/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/nzb-file-trans.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 22:04:58,109 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 22:04:58,111 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 22:04:58,151 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 22:04:58,205 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 22:04:58,241 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 22:04:58,241 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 22:04:58,242 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 22:04:58,242 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 22:04:58,244 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 22:04:58,244 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 22:04:58,244 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 22:04:58,245 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 22:04:58,245 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 22:04:58,245 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 22:04:58,246 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 22:04:58,246 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 22:04:58,246 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 22:04:58,246 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 22:04:58,246 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 22:04:58,246 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 22:04:58,246 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 22:04:58,246 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 22:04:58,247 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 22:04:58,247 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 22:04:58,247 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 22:04:58,247 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 22:04:58,247 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 22:04:58,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 22:04:58,247 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 22:04:58,247 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 22:04:58,248 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 22:04:58,248 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 22:04:58,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 22:04:58,248 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 22:04:58,248 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 22:04:58,248 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 22:04:58,534 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 22:04:58,551 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 22:04:58,554 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 22:04:58,554 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 22:04:58,556 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 22:04:58,556 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/nzb-file-trans.wvr.bpl [2021-06-05 22:04:58,557 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/nzb-file-trans.wvr.bpl' [2021-06-05 22:04:58,595 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 22:04:58,597 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 22:04:58,598 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 22:04:58,598 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 22:04:58,598 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 22:04:58,610 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:04:58" (1/1) ... [2021-06-05 22:04:58,618 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:04:58" (1/1) ... [2021-06-05 22:04:58,624 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 22:04:58,626 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 22:04:58,626 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 22:04:58,626 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 22:04:58,632 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:04:58" (1/1) ... [2021-06-05 22:04:58,633 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:04:58" (1/1) ... [2021-06-05 22:04:58,634 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:04:58" (1/1) ... [2021-06-05 22:04:58,635 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:04:58" (1/1) ... [2021-06-05 22:04:58,639 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:04:58" (1/1) ... [2021-06-05 22:04:58,641 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:04:58" (1/1) ... [2021-06-05 22:04:58,643 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:04:58" (1/1) ... [2021-06-05 22:04:58,645 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 22:04:58,645 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 22:04:58,645 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 22:04:58,646 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 22:04:58,650 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:04:58" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 22:04:58,714 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 22:04:58,714 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 22:04:58,715 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 22:04:58,715 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 22:04:58,715 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 22:04:58,715 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 22:04:58,715 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 22:04:58,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 22:04:58,715 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 22:04:58,716 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 22:04:58,716 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 22:04:58,716 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 22:04:58,718 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 22:04:59,147 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 22:04:59,147 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-06-05 22:04:59,152 INFO L202 PluginConnector]: Adding new model nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 10:04:59 BoogieIcfgContainer [2021-06-05 22:04:59,153 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 22:04:59,154 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 22:04:59,154 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 22:04:59,157 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 22:04:59,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:04:58" (1/2) ... [2021-06-05 22:04:59,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fe55154 and model type nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 10:04:59, skipping insertion in model container [2021-06-05 22:04:59,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 10:04:59" (2/2) ... [2021-06-05 22:04:59,159 INFO L111 eAbstractionObserver]: Analyzing ICFG nzb-file-trans.wvr.bpl [2021-06-05 22:04:59,163 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 22:04:59,163 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 22:04:59,164 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 22:04:59,164 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 22:04:59,232 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 22:04:59,252 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 22:04:59,270 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 22:04:59,270 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 22:04:59,270 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 22:04:59,270 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 22:04:59,270 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 22:04:59,270 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 22:04:59,270 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 22:04:59,270 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 22:04:59,282 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 28 transitions, 80 flow [2021-06-05 22:04:59,307 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 110 states, 108 states have (on average 3.4814814814814814) internal successors, (376), 109 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:59,310 INFO L276 IsEmpty]: Start isEmpty. Operand has 110 states, 108 states have (on average 3.4814814814814814) internal successors, (376), 109 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:59,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 22:04:59,320 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:59,321 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:59,321 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:59,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:04:59,326 INFO L82 PathProgramCache]: Analyzing trace with hash 454115418, now seen corresponding path program 1 times [2021-06-05 22:04:59,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:04:59,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056818781] [2021-06-05 22:04:59,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:04:59,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:04:59,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:04:59,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:04:59,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056818781] [2021-06-05 22:04:59,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056818781] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:04:59,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:04:59,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:04:59,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379003787] [2021-06-05 22:04:59,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:04:59,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:04:59,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:04:59,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:04:59,683 INFO L87 Difference]: Start difference. First operand has 110 states, 108 states have (on average 3.4814814814814814) internal successors, (376), 109 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:59,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:04:59,890 INFO L93 Difference]: Finished difference Result 265 states and 821 transitions. [2021-06-05 22:04:59,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:04:59,892 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 22:04:59,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:04:59,909 INFO L225 Difference]: With dead ends: 265 [2021-06-05 22:04:59,909 INFO L226 Difference]: Without dead ends: 250 [2021-06-05 22:04:59,910 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 129.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:04:59,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-06-05 22:04:59,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 126. [2021-06-05 22:04:59,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 3.368) internal successors, (421), 125 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:59,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 421 transitions. [2021-06-05 22:04:59,994 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 421 transitions. Word has length 14 [2021-06-05 22:04:59,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:04:59,995 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 421 transitions. [2021-06-05 22:04:59,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:04:59,995 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 421 transitions. [2021-06-05 22:04:59,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 22:04:59,997 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:04:59,997 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:04:59,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 22:04:59,997 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:04:59,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:00,001 INFO L82 PathProgramCache]: Analyzing trace with hash -947352844, now seen corresponding path program 2 times [2021-06-05 22:05:00,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:00,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31994672] [2021-06-05 22:05:00,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:00,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:00,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:00,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:00,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31994672] [2021-06-05 22:05:00,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31994672] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:05:00,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:05:00,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:05:00,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103746668] [2021-06-05 22:05:00,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:05:00,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:00,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:05:00,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:05:00,128 INFO L87 Difference]: Start difference. First operand 126 states and 421 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:00,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:00,276 INFO L93 Difference]: Finished difference Result 326 states and 1050 transitions. [2021-06-05 22:05:00,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:05:00,276 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 22:05:00,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:00,279 INFO L225 Difference]: With dead ends: 326 [2021-06-05 22:05:00,279 INFO L226 Difference]: Without dead ends: 311 [2021-06-05 22:05:00,280 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 78.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:05:00,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-06-05 22:05:00,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 132. [2021-06-05 22:05:00,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 3.312977099236641) internal successors, (434), 131 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:00,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 434 transitions. [2021-06-05 22:05:00,291 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 434 transitions. Word has length 14 [2021-06-05 22:05:00,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:00,291 INFO L482 AbstractCegarLoop]: Abstraction has 132 states and 434 transitions. [2021-06-05 22:05:00,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:00,292 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 434 transitions. [2021-06-05 22:05:00,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 22:05:00,293 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:00,293 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:00,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 22:05:00,293 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:00,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:00,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1857974612, now seen corresponding path program 3 times [2021-06-05 22:05:00,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:00,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705540633] [2021-06-05 22:05:00,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:00,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:00,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:00,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:00,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705540633] [2021-06-05 22:05:00,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705540633] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:05:00,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:05:00,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:05:00,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343133601] [2021-06-05 22:05:00,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:05:00,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:00,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:05:00,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:05:00,405 INFO L87 Difference]: Start difference. First operand 132 states and 434 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:00,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:00,541 INFO L93 Difference]: Finished difference Result 261 states and 774 transitions. [2021-06-05 22:05:00,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:05:00,542 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 22:05:00,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:00,545 INFO L225 Difference]: With dead ends: 261 [2021-06-05 22:05:00,547 INFO L226 Difference]: Without dead ends: 246 [2021-06-05 22:05:00,548 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 109.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:05:00,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-06-05 22:05:00,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 140. [2021-06-05 22:05:00,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 3.2949640287769784) internal successors, (458), 139 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:00,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 458 transitions. [2021-06-05 22:05:00,571 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 458 transitions. Word has length 14 [2021-06-05 22:05:00,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:00,571 INFO L482 AbstractCegarLoop]: Abstraction has 140 states and 458 transitions. [2021-06-05 22:05:00,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:00,571 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 458 transitions. [2021-06-05 22:05:00,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 22:05:00,576 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:00,576 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:00,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 22:05:00,577 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:00,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:00,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1906157040, now seen corresponding path program 4 times [2021-06-05 22:05:00,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:00,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840724957] [2021-06-05 22:05:00,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:00,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:00,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:00,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:00,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840724957] [2021-06-05 22:05:00,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840724957] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:05:00,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:05:00,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:05:00,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242752703] [2021-06-05 22:05:00,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:05:00,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:00,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:05:00,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:05:00,654 INFO L87 Difference]: Start difference. First operand 140 states and 458 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:00,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:00,789 INFO L93 Difference]: Finished difference Result 264 states and 776 transitions. [2021-06-05 22:05:00,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:05:00,790 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 22:05:00,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:00,791 INFO L225 Difference]: With dead ends: 264 [2021-06-05 22:05:00,792 INFO L226 Difference]: Without dead ends: 249 [2021-06-05 22:05:00,792 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 106.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:05:00,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-06-05 22:05:00,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 140. [2021-06-05 22:05:00,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 3.2949640287769784) internal successors, (458), 139 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:00,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 458 transitions. [2021-06-05 22:05:00,797 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 458 transitions. Word has length 14 [2021-06-05 22:05:00,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:00,804 INFO L482 AbstractCegarLoop]: Abstraction has 140 states and 458 transitions. [2021-06-05 22:05:00,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:00,805 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 458 transitions. [2021-06-05 22:05:00,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 22:05:00,805 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:00,805 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:00,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 22:05:00,806 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:00,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:00,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1941149522, now seen corresponding path program 5 times [2021-06-05 22:05:00,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:00,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521625369] [2021-06-05 22:05:00,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:00,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:00,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:00,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:00,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521625369] [2021-06-05 22:05:00,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521625369] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:05:00,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:05:00,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:05:00,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056701006] [2021-06-05 22:05:00,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:05:00,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:00,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:05:00,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:05:00,906 INFO L87 Difference]: Start difference. First operand 140 states and 458 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:01,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:01,147 INFO L93 Difference]: Finished difference Result 229 states and 668 transitions. [2021-06-05 22:05:01,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:05:01,149 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 22:05:01,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:01,151 INFO L225 Difference]: With dead ends: 229 [2021-06-05 22:05:01,151 INFO L226 Difference]: Without dead ends: 214 [2021-06-05 22:05:01,151 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 230.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:05:01,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-06-05 22:05:01,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 142. [2021-06-05 22:05:01,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 3.3120567375886525) internal successors, (467), 141 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:01,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 467 transitions. [2021-06-05 22:05:01,163 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 467 transitions. Word has length 14 [2021-06-05 22:05:01,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:01,163 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 467 transitions. [2021-06-05 22:05:01,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:01,164 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 467 transitions. [2021-06-05 22:05:01,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 22:05:01,164 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:01,164 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:01,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 22:05:01,165 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:01,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:01,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1674927890, now seen corresponding path program 6 times [2021-06-05 22:05:01,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:01,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034541166] [2021-06-05 22:05:01,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:01,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:01,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:01,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:01,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034541166] [2021-06-05 22:05:01,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034541166] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:05:01,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:05:01,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:05:01,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176503815] [2021-06-05 22:05:01,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:05:01,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:01,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:05:01,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:05:01,257 INFO L87 Difference]: Start difference. First operand 142 states and 467 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:01,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:01,563 INFO L93 Difference]: Finished difference Result 336 states and 1030 transitions. [2021-06-05 22:05:01,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 22:05:01,563 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 22:05:01,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:01,565 INFO L225 Difference]: With dead ends: 336 [2021-06-05 22:05:01,565 INFO L226 Difference]: Without dead ends: 321 [2021-06-05 22:05:01,566 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 229.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:05:01,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-06-05 22:05:01,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 142. [2021-06-05 22:05:01,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 3.3120567375886525) internal successors, (467), 141 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:01,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 467 transitions. [2021-06-05 22:05:01,573 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 467 transitions. Word has length 14 [2021-06-05 22:05:01,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:01,573 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 467 transitions. [2021-06-05 22:05:01,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:01,573 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 467 transitions. [2021-06-05 22:05:01,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 22:05:01,574 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:01,574 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:01,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 22:05:01,574 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:01,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:01,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1444712772, now seen corresponding path program 1 times [2021-06-05 22:05:01,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:01,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146148461] [2021-06-05 22:05:01,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:01,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:01,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:01,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:01,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146148461] [2021-06-05 22:05:01,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146148461] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:05:01,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:05:01,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 22:05:01,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260925942] [2021-06-05 22:05:01,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 22:05:01,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:01,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 22:05:01,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 22:05:01,591 INFO L87 Difference]: Start difference. First operand 142 states and 467 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:01,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:01,595 INFO L93 Difference]: Finished difference Result 166 states and 549 transitions. [2021-06-05 22:05:01,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 22:05:01,596 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 22:05:01,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:01,597 INFO L225 Difference]: With dead ends: 166 [2021-06-05 22:05:01,597 INFO L226 Difference]: Without dead ends: 166 [2021-06-05 22:05:01,597 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 22:05:01,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-06-05 22:05:01,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2021-06-05 22:05:01,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 3.327272727272727) internal successors, (549), 165 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:01,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 549 transitions. [2021-06-05 22:05:01,603 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 549 transitions. Word has length 15 [2021-06-05 22:05:01,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:01,603 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 549 transitions. [2021-06-05 22:05:01,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:01,603 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 549 transitions. [2021-06-05 22:05:01,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 22:05:01,604 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:01,604 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:01,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 22:05:01,604 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:01,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:01,604 INFO L82 PathProgramCache]: Analyzing trace with hash 868256482, now seen corresponding path program 1 times [2021-06-05 22:05:01,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:01,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626088126] [2021-06-05 22:05:01,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:01,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:01,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:01,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:01,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626088126] [2021-06-05 22:05:01,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626088126] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:05:01,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:05:01,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 22:05:01,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623001185] [2021-06-05 22:05:01,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 22:05:01,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:01,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 22:05:01,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 22:05:01,620 INFO L87 Difference]: Start difference. First operand 166 states and 549 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:01,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:01,626 INFO L93 Difference]: Finished difference Result 192 states and 636 transitions. [2021-06-05 22:05:01,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 22:05:01,626 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 22:05:01,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:01,628 INFO L225 Difference]: With dead ends: 192 [2021-06-05 22:05:01,628 INFO L226 Difference]: Without dead ends: 192 [2021-06-05 22:05:01,628 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 22:05:01,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-06-05 22:05:01,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2021-06-05 22:05:01,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 3.329842931937173) internal successors, (636), 191 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:01,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 636 transitions. [2021-06-05 22:05:01,635 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 636 transitions. Word has length 15 [2021-06-05 22:05:01,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:01,635 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 636 transitions. [2021-06-05 22:05:01,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:01,635 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 636 transitions. [2021-06-05 22:05:01,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 22:05:01,636 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:01,636 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:01,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-05 22:05:01,636 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:01,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:01,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1029743448, now seen corresponding path program 1 times [2021-06-05 22:05:01,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:01,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416688295] [2021-06-05 22:05:01,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:01,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:01,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:01,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:01,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416688295] [2021-06-05 22:05:01,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416688295] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:05:01,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:05:01,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 22:05:01,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503872573] [2021-06-05 22:05:01,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 22:05:01,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:01,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 22:05:01,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 22:05:01,654 INFO L87 Difference]: Start difference. First operand 192 states and 636 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:01,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:01,659 INFO L93 Difference]: Finished difference Result 223 states and 739 transitions. [2021-06-05 22:05:01,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 22:05:01,660 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 22:05:01,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:01,661 INFO L225 Difference]: With dead ends: 223 [2021-06-05 22:05:01,662 INFO L226 Difference]: Without dead ends: 223 [2021-06-05 22:05:01,662 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 22:05:01,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-06-05 22:05:01,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2021-06-05 22:05:01,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 3.328828828828829) internal successors, (739), 222 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:01,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 739 transitions. [2021-06-05 22:05:01,669 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 739 transitions. Word has length 15 [2021-06-05 22:05:01,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:01,669 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 739 transitions. [2021-06-05 22:05:01,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:01,670 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 739 transitions. [2021-06-05 22:05:01,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:05:01,670 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:01,671 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:01,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-05 22:05:01,671 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:01,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:01,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1505443044, now seen corresponding path program 1 times [2021-06-05 22:05:01,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:01,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762079612] [2021-06-05 22:05:01,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:01,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:01,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:05:01,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:01,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762079612] [2021-06-05 22:05:01,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762079612] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:05:01,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:05:01,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:05:01,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761662077] [2021-06-05 22:05:01,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:05:01,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:01,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:05:01,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:05:01,716 INFO L87 Difference]: Start difference. First operand 223 states and 739 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:01,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:01,761 INFO L93 Difference]: Finished difference Result 414 states and 1238 transitions. [2021-06-05 22:05:01,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:05:01,762 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:05:01,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:01,764 INFO L225 Difference]: With dead ends: 414 [2021-06-05 22:05:01,764 INFO L226 Difference]: Without dead ends: 366 [2021-06-05 22:05:01,765 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 26.4ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:05:01,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-06-05 22:05:01,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 223. [2021-06-05 22:05:01,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 3.3063063063063063) internal successors, (734), 222 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:01,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 734 transitions. [2021-06-05 22:05:01,775 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 734 transitions. Word has length 16 [2021-06-05 22:05:01,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:01,775 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 734 transitions. [2021-06-05 22:05:01,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:01,775 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 734 transitions. [2021-06-05 22:05:01,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:05:01,776 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:01,776 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:01,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-05 22:05:01,776 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:01,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:01,777 INFO L82 PathProgramCache]: Analyzing trace with hash 821727578, now seen corresponding path program 1 times [2021-06-05 22:05:01,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:01,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498448242] [2021-06-05 22:05:01,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:01,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:01,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:05:01,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:01,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498448242] [2021-06-05 22:05:01,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498448242] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:05:01,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:05:01,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:05:01,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168918128] [2021-06-05 22:05:01,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:05:01,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:01,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:05:01,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:05:01,812 INFO L87 Difference]: Start difference. First operand 223 states and 734 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:01,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:01,887 INFO L93 Difference]: Finished difference Result 571 states and 1740 transitions. [2021-06-05 22:05:01,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 22:05:01,888 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:05:01,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:01,891 INFO L225 Difference]: With dead ends: 571 [2021-06-05 22:05:01,891 INFO L226 Difference]: Without dead ends: 495 [2021-06-05 22:05:01,891 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.8ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:05:01,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-06-05 22:05:01,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 233. [2021-06-05 22:05:01,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 3.2456896551724137) internal successors, (753), 232 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:01,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 753 transitions. [2021-06-05 22:05:01,902 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 753 transitions. Word has length 16 [2021-06-05 22:05:01,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:01,902 INFO L482 AbstractCegarLoop]: Abstraction has 233 states and 753 transitions. [2021-06-05 22:05:01,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:01,902 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 753 transitions. [2021-06-05 22:05:01,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:05:01,903 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:01,903 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:01,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-05 22:05:01,903 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:01,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:01,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1911442418, now seen corresponding path program 2 times [2021-06-05 22:05:01,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:01,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38093518] [2021-06-05 22:05:01,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:01,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:01,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:05:01,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:01,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38093518] [2021-06-05 22:05:01,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38093518] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:05:01,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:05:01,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 22:05:01,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857822729] [2021-06-05 22:05:01,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 22:05:01,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:01,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 22:05:01,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 22:05:01,937 INFO L87 Difference]: Start difference. First operand 233 states and 753 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:01,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:01,952 INFO L93 Difference]: Finished difference Result 347 states and 1054 transitions. [2021-06-05 22:05:01,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 22:05:01,952 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:05:01,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:01,954 INFO L225 Difference]: With dead ends: 347 [2021-06-05 22:05:01,954 INFO L226 Difference]: Without dead ends: 283 [2021-06-05 22:05:01,954 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 22:05:01,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-06-05 22:05:01,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 230. [2021-06-05 22:05:01,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 3.2620087336244543) internal successors, (747), 229 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:01,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 747 transitions. [2021-06-05 22:05:01,962 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 747 transitions. Word has length 16 [2021-06-05 22:05:01,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:01,962 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 747 transitions. [2021-06-05 22:05:01,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:01,962 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 747 transitions. [2021-06-05 22:05:01,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:05:01,963 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:01,963 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:01,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-05 22:05:01,964 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:01,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:01,964 INFO L82 PathProgramCache]: Analyzing trace with hash -2095449492, now seen corresponding path program 1 times [2021-06-05 22:05:01,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:01,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996669121] [2021-06-05 22:05:01,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:01,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:01,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:01,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:01,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996669121] [2021-06-05 22:05:01,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996669121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:01,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564269621] [2021-06-05 22:05:01,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:02,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:02,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 22:05:02,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:02,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:02,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564269621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:02,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:02,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-06-05 22:05:02,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173418878] [2021-06-05 22:05:02,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 22:05:02,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:02,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 22:05:02,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:05:02,219 INFO L87 Difference]: Start difference. First operand 230 states and 747 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:02,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:02,321 INFO L93 Difference]: Finished difference Result 529 states and 1519 transitions. [2021-06-05 22:05:02,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:05:02,322 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:05:02,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:02,324 INFO L225 Difference]: With dead ends: 529 [2021-06-05 22:05:02,324 INFO L226 Difference]: Without dead ends: 455 [2021-06-05 22:05:02,324 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 78.2ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:05:02,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-06-05 22:05:02,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 240. [2021-06-05 22:05:02,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 3.1380753138075312) internal successors, (750), 239 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:02,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 750 transitions. [2021-06-05 22:05:02,335 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 750 transitions. Word has length 16 [2021-06-05 22:05:02,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:02,336 INFO L482 AbstractCegarLoop]: Abstraction has 240 states and 750 transitions. [2021-06-05 22:05:02,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:02,336 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 750 transitions. [2021-06-05 22:05:02,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:05:02,353 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:02,353 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:02,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-05 22:05:02,555 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:02,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:02,555 INFO L82 PathProgramCache]: Analyzing trace with hash 364875434, now seen corresponding path program 3 times [2021-06-05 22:05:02,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:02,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397305209] [2021-06-05 22:05:02,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:02,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:02,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:05:02,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:02,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397305209] [2021-06-05 22:05:02,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397305209] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:05:02,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:05:02,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 22:05:02,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207992648] [2021-06-05 22:05:02,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 22:05:02,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:02,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 22:05:02,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 22:05:02,576 INFO L87 Difference]: Start difference. First operand 240 states and 750 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:02,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:02,604 INFO L93 Difference]: Finished difference Result 335 states and 978 transitions. [2021-06-05 22:05:02,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 22:05:02,605 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:05:02,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:02,606 INFO L225 Difference]: With dead ends: 335 [2021-06-05 22:05:02,606 INFO L226 Difference]: Without dead ends: 263 [2021-06-05 22:05:02,607 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:05:02,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-06-05 22:05:02,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 234. [2021-06-05 22:05:02,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 3.0257510729613735) internal successors, (705), 233 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:02,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 705 transitions. [2021-06-05 22:05:02,614 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 705 transitions. Word has length 16 [2021-06-05 22:05:02,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:02,614 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 705 transitions. [2021-06-05 22:05:02,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:02,614 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 705 transitions. [2021-06-05 22:05:02,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:05:02,615 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:02,615 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:02,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-05 22:05:02,616 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:02,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:02,616 INFO L82 PathProgramCache]: Analyzing trace with hash -792720916, now seen corresponding path program 2 times [2021-06-05 22:05:02,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:02,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979348733] [2021-06-05 22:05:02,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:02,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:02,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:05:02,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:02,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979348733] [2021-06-05 22:05:02,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979348733] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:05:02,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:05:02,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 22:05:02,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239503444] [2021-06-05 22:05:02,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 22:05:02,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:02,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 22:05:02,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 22:05:02,657 INFO L87 Difference]: Start difference. First operand 234 states and 705 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:02,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:02,673 INFO L93 Difference]: Finished difference Result 314 states and 885 transitions. [2021-06-05 22:05:02,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 22:05:02,673 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:05:02,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:02,675 INFO L225 Difference]: With dead ends: 314 [2021-06-05 22:05:02,675 INFO L226 Difference]: Without dead ends: 244 [2021-06-05 22:05:02,676 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 22:05:02,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-06-05 22:05:02,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 213. [2021-06-05 22:05:02,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.9669811320754715) internal successors, (629), 212 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:02,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 629 transitions. [2021-06-05 22:05:02,684 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 629 transitions. Word has length 16 [2021-06-05 22:05:02,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:02,684 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 629 transitions. [2021-06-05 22:05:02,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:02,684 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 629 transitions. [2021-06-05 22:05:02,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:05:02,685 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:02,685 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:02,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-06-05 22:05:02,686 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:02,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:02,686 INFO L82 PathProgramCache]: Analyzing trace with hash -507279316, now seen corresponding path program 2 times [2021-06-05 22:05:02,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:02,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891855193] [2021-06-05 22:05:02,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:02,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:02,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:05:02,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:02,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891855193] [2021-06-05 22:05:02,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891855193] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:05:02,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:05:02,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:05:02,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901544179] [2021-06-05 22:05:02,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:05:02,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:02,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:05:02,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:05:02,726 INFO L87 Difference]: Start difference. First operand 213 states and 629 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:02,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:02,746 INFO L93 Difference]: Finished difference Result 281 states and 773 transitions. [2021-06-05 22:05:02,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:05:02,747 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:05:02,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:02,748 INFO L225 Difference]: With dead ends: 281 [2021-06-05 22:05:02,748 INFO L226 Difference]: Without dead ends: 240 [2021-06-05 22:05:02,748 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 18.0ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:05:02,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-06-05 22:05:02,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 209. [2021-06-05 22:05:02,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.985576923076923) internal successors, (621), 208 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:02,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 621 transitions. [2021-06-05 22:05:02,754 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 621 transitions. Word has length 16 [2021-06-05 22:05:02,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:02,754 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 621 transitions. [2021-06-05 22:05:02,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:02,754 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 621 transitions. [2021-06-05 22:05:02,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:05:02,755 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:02,755 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:02,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-06-05 22:05:02,755 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:02,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:02,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1232360210, now seen corresponding path program 3 times [2021-06-05 22:05:02,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:02,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546926823] [2021-06-05 22:05:02,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:02,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:02,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:05:02,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:02,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546926823] [2021-06-05 22:05:02,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546926823] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:05:02,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:05:02,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:05:02,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161493885] [2021-06-05 22:05:02,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:05:02,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:02,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:05:02,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:05:02,781 INFO L87 Difference]: Start difference. First operand 209 states and 621 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:02,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:02,813 INFO L93 Difference]: Finished difference Result 238 states and 670 transitions. [2021-06-05 22:05:02,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:05:02,814 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:05:02,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:02,815 INFO L225 Difference]: With dead ends: 238 [2021-06-05 22:05:02,815 INFO L226 Difference]: Without dead ends: 189 [2021-06-05 22:05:02,815 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:05:02,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-06-05 22:05:02,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2021-06-05 22:05:02,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9202127659574466) internal successors, (549), 188 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:02,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 549 transitions. [2021-06-05 22:05:02,820 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 549 transitions. Word has length 16 [2021-06-05 22:05:02,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:02,820 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 549 transitions. [2021-06-05 22:05:02,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:02,820 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 549 transitions. [2021-06-05 22:05:02,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:02,821 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:02,821 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:02,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-06-05 22:05:02,821 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:02,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:02,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1392682474, now seen corresponding path program 1 times [2021-06-05 22:05:02,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:02,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52119] [2021-06-05 22:05:02,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:02,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:03,021 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:03,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:03,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52119] [2021-06-05 22:05:03,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:03,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023462313] [2021-06-05 22:05:03,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:03,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:03,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:05:03,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:03,490 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:05:03,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023462313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:03,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:03,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-06-05 22:05:03,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942964754] [2021-06-05 22:05:03,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:05:03,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:03,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:05:03,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:05:03,494 INFO L87 Difference]: Start difference. First operand 189 states and 549 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:04,154 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-06-05 22:05:04,785 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-06-05 22:05:04,939 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2021-06-05 22:05:05,098 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2021-06-05 22:05:05,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:05,162 INFO L93 Difference]: Finished difference Result 577 states and 1611 transitions. [2021-06-05 22:05:05,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:05:05,163 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:05,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:05,165 INFO L225 Difference]: With dead ends: 577 [2021-06-05 22:05:05,165 INFO L226 Difference]: Without dead ends: 486 [2021-06-05 22:05:05,166 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1559.4ms TimeCoverageRelationStatistics Valid=208, Invalid=662, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:05:05,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-06-05 22:05:05,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 243. [2021-06-05 22:05:05,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.9545454545454546) internal successors, (715), 242 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:05,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 715 transitions. [2021-06-05 22:05:05,173 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 715 transitions. Word has length 20 [2021-06-05 22:05:05,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:05,173 INFO L482 AbstractCegarLoop]: Abstraction has 243 states and 715 transitions. [2021-06-05 22:05:05,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:05,173 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 715 transitions. [2021-06-05 22:05:05,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:05,174 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:05,174 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:05,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 22:05:05,397 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:05,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:05,397 INFO L82 PathProgramCache]: Analyzing trace with hash 56489052, now seen corresponding path program 2 times [2021-06-05 22:05:05,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:05,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007011215] [2021-06-05 22:05:05,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:05,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:05,532 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:05,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:05,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007011215] [2021-06-05 22:05:05,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007011215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:05,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161536849] [2021-06-05 22:05:05,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:05,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:05:05,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:05,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 22:05:05,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:05,944 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:05:05,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161536849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:05,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:05,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 22:05:05,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826690969] [2021-06-05 22:05:05,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:05,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:05,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:05,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:05,947 INFO L87 Difference]: Start difference. First operand 243 states and 715 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:07,220 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-06-05 22:05:07,616 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-06-05 22:05:08,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:08,095 INFO L93 Difference]: Finished difference Result 801 states and 2205 transitions. [2021-06-05 22:05:08,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:05:08,095 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:08,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:08,098 INFO L225 Difference]: With dead ends: 801 [2021-06-05 22:05:08,099 INFO L226 Difference]: Without dead ends: 633 [2021-06-05 22:05:08,099 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1964.5ms TimeCoverageRelationStatistics Valid=284, Invalid=1122, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:05:08,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-06-05 22:05:08,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 284. [2021-06-05 22:05:08,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.954063604240283) internal successors, (836), 283 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:08,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 836 transitions. [2021-06-05 22:05:08,109 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 836 transitions. Word has length 20 [2021-06-05 22:05:08,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:08,109 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 836 transitions. [2021-06-05 22:05:08,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:08,109 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 836 transitions. [2021-06-05 22:05:08,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:08,110 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:08,110 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:08,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:08,333 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:08,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:08,333 INFO L82 PathProgramCache]: Analyzing trace with hash 2054143060, now seen corresponding path program 3 times [2021-06-05 22:05:08,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:08,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719463023] [2021-06-05 22:05:08,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:08,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:08,554 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:08,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:08,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719463023] [2021-06-05 22:05:08,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719463023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:08,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213853900] [2021-06-05 22:05:08,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:08,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:05:08,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:08,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:05:08,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:08,891 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:05:08,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213853900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:08,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:08,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-06-05 22:05:08,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344014253] [2021-06-05 22:05:08,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:05:08,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:08,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:05:08,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:05:08,896 INFO L87 Difference]: Start difference. First operand 284 states and 836 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:09,978 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-06-05 22:05:10,256 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 43 [2021-06-05 22:05:10,409 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2021-06-05 22:05:10,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:10,930 INFO L93 Difference]: Finished difference Result 766 states and 2175 transitions. [2021-06-05 22:05:10,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:05:10,931 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:10,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:10,934 INFO L225 Difference]: With dead ends: 766 [2021-06-05 22:05:10,934 INFO L226 Difference]: Without dead ends: 654 [2021-06-05 22:05:10,935 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1858.8ms TimeCoverageRelationStatistics Valid=281, Invalid=1051, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:05:10,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2021-06-05 22:05:10,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 303. [2021-06-05 22:05:10,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.9205298013245033) internal successors, (882), 302 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:10,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 882 transitions. [2021-06-05 22:05:10,944 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 882 transitions. Word has length 20 [2021-06-05 22:05:10,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:10,945 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 882 transitions. [2021-06-05 22:05:10,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:10,945 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 882 transitions. [2021-06-05 22:05:10,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:10,946 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:10,946 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:11,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:11,169 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:11,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:11,169 INFO L82 PathProgramCache]: Analyzing trace with hash 585717068, now seen corresponding path program 4 times [2021-06-05 22:05:11,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:11,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879238176] [2021-06-05 22:05:11,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:11,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:11,415 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:11,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:11,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879238176] [2021-06-05 22:05:11,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879238176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:11,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241764754] [2021-06-05 22:05:11,416 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:11,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:05:11,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:11,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 22:05:11,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:11,842 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:05:11,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241764754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:11,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:11,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 22:05:11,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827966226] [2021-06-05 22:05:11,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:11,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:11,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:11,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:11,844 INFO L87 Difference]: Start difference. First operand 303 states and 882 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:13,204 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2021-06-05 22:05:13,713 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2021-06-05 22:05:13,839 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2021-06-05 22:05:14,226 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2021-06-05 22:05:14,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:14,448 INFO L93 Difference]: Finished difference Result 971 states and 2714 transitions. [2021-06-05 22:05:14,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:05:14,449 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:14,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:14,452 INFO L225 Difference]: With dead ends: 971 [2021-06-05 22:05:14,452 INFO L226 Difference]: Without dead ends: 736 [2021-06-05 22:05:14,453 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 2486.3ms TimeCoverageRelationStatistics Valid=359, Invalid=1363, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:05:14,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2021-06-05 22:05:14,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 362. [2021-06-05 22:05:14,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 3.0554016620498614) internal successors, (1103), 361 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:14,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 1103 transitions. [2021-06-05 22:05:14,465 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 1103 transitions. Word has length 20 [2021-06-05 22:05:14,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:14,466 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 1103 transitions. [2021-06-05 22:05:14,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:14,466 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 1103 transitions. [2021-06-05 22:05:14,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:14,468 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:14,468 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:14,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 22:05:14,689 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:14,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:14,689 INFO L82 PathProgramCache]: Analyzing trace with hash -2103334614, now seen corresponding path program 5 times [2021-06-05 22:05:14,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:14,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466759108] [2021-06-05 22:05:14,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:14,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:14,928 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:14,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:14,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466759108] [2021-06-05 22:05:14,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466759108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:14,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472023967] [2021-06-05 22:05:14,929 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:14,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:05:14,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:14,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:05:14,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:15,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:05:15,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472023967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:15,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:15,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 22:05:15,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119821710] [2021-06-05 22:05:15,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:05:15,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:15,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:05:15,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:05:15,218 INFO L87 Difference]: Start difference. First operand 362 states and 1103 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:16,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:16,436 INFO L93 Difference]: Finished difference Result 667 states and 1967 transitions. [2021-06-05 22:05:16,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:05:16,437 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:16,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:16,440 INFO L225 Difference]: With dead ends: 667 [2021-06-05 22:05:16,440 INFO L226 Difference]: Without dead ends: 592 [2021-06-05 22:05:16,440 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1085.4ms TimeCoverageRelationStatistics Valid=240, Invalid=1092, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:05:16,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-06-05 22:05:16,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 368. [2021-06-05 22:05:16,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 3.0544959128065394) internal successors, (1121), 367 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:16,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1121 transitions. [2021-06-05 22:05:16,449 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1121 transitions. Word has length 20 [2021-06-05 22:05:16,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:16,450 INFO L482 AbstractCegarLoop]: Abstraction has 368 states and 1121 transitions. [2021-06-05 22:05:16,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:16,450 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1121 transitions. [2021-06-05 22:05:16,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:16,451 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:16,451 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:16,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:16,673 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:16,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:16,673 INFO L82 PathProgramCache]: Analyzing trace with hash -927843970, now seen corresponding path program 6 times [2021-06-05 22:05:16,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:16,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575643091] [2021-06-05 22:05:16,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:16,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:16,809 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:16,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:16,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575643091] [2021-06-05 22:05:16,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575643091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:16,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252245967] [2021-06-05 22:05:16,810 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:16,856 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:05:16,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:16,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 22:05:16,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:17,127 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:05:17,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252245967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:17,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:17,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 22:05:17,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197516031] [2021-06-05 22:05:17,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:05:17,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:17,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:05:17,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:05:17,128 INFO L87 Difference]: Start difference. First operand 368 states and 1121 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:17,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:17,410 INFO L93 Difference]: Finished difference Result 643 states and 1884 transitions. [2021-06-05 22:05:17,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:05:17,410 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:17,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:17,413 INFO L225 Difference]: With dead ends: 643 [2021-06-05 22:05:17,413 INFO L226 Difference]: Without dead ends: 565 [2021-06-05 22:05:17,413 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 356.9ms TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:05:17,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-06-05 22:05:17,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 374. [2021-06-05 22:05:17,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 373 states have (on average 3.06970509383378) internal successors, (1145), 373 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:17,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 1145 transitions. [2021-06-05 22:05:17,425 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 1145 transitions. Word has length 20 [2021-06-05 22:05:17,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:17,426 INFO L482 AbstractCegarLoop]: Abstraction has 374 states and 1145 transitions. [2021-06-05 22:05:17,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:17,426 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 1145 transitions. [2021-06-05 22:05:17,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:17,427 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:17,427 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:17,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:17,645 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:17,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:17,645 INFO L82 PathProgramCache]: Analyzing trace with hash 685722764, now seen corresponding path program 7 times [2021-06-05 22:05:17,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:17,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102550835] [2021-06-05 22:05:17,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:17,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:17,825 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:17,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:17,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102550835] [2021-06-05 22:05:17,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102550835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:17,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71948568] [2021-06-05 22:05:17,826 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:17,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:17,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:05:17,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:18,370 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1, ends_with_6], 1=[ends_with_2]} [2021-06-05 22:05:18,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:05:18,382 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:18,386 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:05:18,387 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:18,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:05:18,392 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:18,395 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:05:18,396 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:18,400 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:05:18,401 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:18,404 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:05:18,405 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:18,481 INFO L628 ElimStorePlain]: treesize reduction 83, result has 46.1 percent of original size [2021-06-05 22:05:18,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:05:18,485 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:18,531 INFO L628 ElimStorePlain]: treesize reduction 25, result has 63.2 percent of original size [2021-06-05 22:05:18,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:05:18,535 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:18,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:05:18,539 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:18,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:18,559 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:05:18,559 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 4 variables, input treesize:278, output treesize:20 [2021-06-05 22:05:18,619 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:05:18,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71948568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:18,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:18,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-06-05 22:05:18,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519340877] [2021-06-05 22:05:18,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:05:18,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:18,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:05:18,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:05:18,621 INFO L87 Difference]: Start difference. First operand 374 states and 1145 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:19,700 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2021-06-05 22:05:19,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:19,880 INFO L93 Difference]: Finished difference Result 613 states and 1787 transitions. [2021-06-05 22:05:19,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:05:19,881 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:19,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:19,883 INFO L225 Difference]: With dead ends: 613 [2021-06-05 22:05:19,883 INFO L226 Difference]: Without dead ends: 553 [2021-06-05 22:05:19,884 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1120.6ms TimeCoverageRelationStatistics Valid=188, Invalid=868, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:05:19,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-06-05 22:05:19,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 384. [2021-06-05 22:05:19,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 3.0548302872062663) internal successors, (1170), 383 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:19,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1170 transitions. [2021-06-05 22:05:19,892 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1170 transitions. Word has length 20 [2021-06-05 22:05:19,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:19,893 INFO L482 AbstractCegarLoop]: Abstraction has 384 states and 1170 transitions. [2021-06-05 22:05:19,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:19,893 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1170 transitions. [2021-06-05 22:05:19,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:19,894 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:19,894 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:20,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 22:05:20,113 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:20,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:20,113 INFO L82 PathProgramCache]: Analyzing trace with hash 504067178, now seen corresponding path program 8 times [2021-06-05 22:05:20,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:20,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383899438] [2021-06-05 22:05:20,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:20,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:20,204 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:05:20,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:20,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383899438] [2021-06-05 22:05:20,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383899438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:20,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149566922] [2021-06-05 22:05:20,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:20,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:05:20,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:20,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 22:05:20,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:20,491 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:05:20,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149566922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:20,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:20,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 22:05:20,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739623368] [2021-06-05 22:05:20,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:05:20,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:20,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:05:20,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:05:20,493 INFO L87 Difference]: Start difference. First operand 384 states and 1170 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:20,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:20,799 INFO L93 Difference]: Finished difference Result 663 states and 1941 transitions. [2021-06-05 22:05:20,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:05:20,799 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:20,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:20,802 INFO L225 Difference]: With dead ends: 663 [2021-06-05 22:05:20,802 INFO L226 Difference]: Without dead ends: 537 [2021-06-05 22:05:20,802 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 342.4ms TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:05:20,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-06-05 22:05:20,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 389. [2021-06-05 22:05:20,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 3.054123711340206) internal successors, (1185), 388 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:20,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 1185 transitions. [2021-06-05 22:05:20,811 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 1185 transitions. Word has length 20 [2021-06-05 22:05:20,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:20,812 INFO L482 AbstractCegarLoop]: Abstraction has 389 states and 1185 transitions. [2021-06-05 22:05:20,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:20,812 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 1185 transitions. [2021-06-05 22:05:20,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:20,813 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:20,813 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:21,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:21,029 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:21,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:21,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1287248534, now seen corresponding path program 9 times [2021-06-05 22:05:21,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:21,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484426047] [2021-06-05 22:05:21,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:21,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:21,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:05:21,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:21,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484426047] [2021-06-05 22:05:21,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484426047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:21,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414140638] [2021-06-05 22:05:21,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:21,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:05:21,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:21,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 22:05:21,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:21,445 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:05:21,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414140638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:21,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:21,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 22:05:21,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194911316] [2021-06-05 22:05:21,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:05:21,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:21,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:05:21,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:05:21,448 INFO L87 Difference]: Start difference. First operand 389 states and 1185 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:21,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:21,954 INFO L93 Difference]: Finished difference Result 865 states and 2507 transitions. [2021-06-05 22:05:21,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:05:21,955 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:21,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:21,957 INFO L225 Difference]: With dead ends: 865 [2021-06-05 22:05:21,957 INFO L226 Difference]: Without dead ends: 722 [2021-06-05 22:05:21,957 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 588.2ms TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:05:21,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2021-06-05 22:05:21,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 395. [2021-06-05 22:05:21,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 3.068527918781726) internal successors, (1209), 394 states have internal predecessors, (1209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:21,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1209 transitions. [2021-06-05 22:05:21,971 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1209 transitions. Word has length 20 [2021-06-05 22:05:21,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:21,971 INFO L482 AbstractCegarLoop]: Abstraction has 395 states and 1209 transitions. [2021-06-05 22:05:21,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:21,971 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1209 transitions. [2021-06-05 22:05:21,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:21,972 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:21,972 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:22,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-06-05 22:05:22,190 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:22,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:22,190 INFO L82 PathProgramCache]: Analyzing trace with hash 326318200, now seen corresponding path program 10 times [2021-06-05 22:05:22,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:22,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306434077] [2021-06-05 22:05:22,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:22,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:22,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:05:22,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:22,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306434077] [2021-06-05 22:05:22,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306434077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:22,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037695087] [2021-06-05 22:05:22,269 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:22,323 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:05:22,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:22,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 22:05:22,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:22,574 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:05:22,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037695087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:22,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:22,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 22:05:22,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114040826] [2021-06-05 22:05:22,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:05:22,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:22,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:05:22,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:05:22,575 INFO L87 Difference]: Start difference. First operand 395 states and 1209 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:22,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:22,926 INFO L93 Difference]: Finished difference Result 717 states and 2094 transitions. [2021-06-05 22:05:22,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:05:22,927 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:22,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:22,930 INFO L225 Difference]: With dead ends: 717 [2021-06-05 22:05:22,930 INFO L226 Difference]: Without dead ends: 558 [2021-06-05 22:05:22,930 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 453.2ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:05:22,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-06-05 22:05:22,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 389. [2021-06-05 22:05:22,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 3.054123711340206) internal successors, (1185), 388 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:22,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 1185 transitions. [2021-06-05 22:05:22,949 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 1185 transitions. Word has length 20 [2021-06-05 22:05:22,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:22,949 INFO L482 AbstractCegarLoop]: Abstraction has 389 states and 1185 transitions. [2021-06-05 22:05:22,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:22,950 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 1185 transitions. [2021-06-05 22:05:22,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:22,953 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:22,953 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:23,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-06-05 22:05:23,169 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:23,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:23,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1731378416, now seen corresponding path program 11 times [2021-06-05 22:05:23,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:23,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066254938] [2021-06-05 22:05:23,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:23,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:23,274 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:05:23,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:23,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066254938] [2021-06-05 22:05:23,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066254938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:23,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085043292] [2021-06-05 22:05:23,275 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:23,312 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:05:23,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:23,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 22:05:23,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:23,580 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:05:23,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085043292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:23,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:23,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 22:05:23,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538881776] [2021-06-05 22:05:23,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:05:23,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:23,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:05:23,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:05:23,582 INFO L87 Difference]: Start difference. First operand 389 states and 1185 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:25,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:25,231 INFO L93 Difference]: Finished difference Result 980 states and 2855 transitions. [2021-06-05 22:05:25,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 22:05:25,231 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:25,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:25,234 INFO L225 Difference]: With dead ends: 980 [2021-06-05 22:05:25,234 INFO L226 Difference]: Without dead ends: 780 [2021-06-05 22:05:25,235 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 1459.9ms TimeCoverageRelationStatistics Valid=342, Invalid=1464, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:05:25,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2021-06-05 22:05:25,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 442. [2021-06-05 22:05:25,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 3.0657596371882088) internal successors, (1352), 441 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:25,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 1352 transitions. [2021-06-05 22:05:25,245 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 1352 transitions. Word has length 20 [2021-06-05 22:05:25,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:25,245 INFO L482 AbstractCegarLoop]: Abstraction has 442 states and 1352 transitions. [2021-06-05 22:05:25,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:25,245 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 1352 transitions. [2021-06-05 22:05:25,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:25,246 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:25,247 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:25,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-06-05 22:05:25,457 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:25,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:25,457 INFO L82 PathProgramCache]: Analyzing trace with hash -852916892, now seen corresponding path program 12 times [2021-06-05 22:05:25,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:25,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611178546] [2021-06-05 22:05:25,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:25,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:25,528 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:25,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:25,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611178546] [2021-06-05 22:05:25,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611178546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:25,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358174314] [2021-06-05 22:05:25,529 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:25,579 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:05:25,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:25,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 22:05:25,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:25,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:05:25,664 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:25,742 INFO L628 ElimStorePlain]: treesize reduction 4, result has 95.5 percent of original size [2021-06-05 22:05:25,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:05:25,746 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:25,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:05:25,750 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:25,811 INFO L628 ElimStorePlain]: treesize reduction 18, result has 76.6 percent of original size [2021-06-05 22:05:25,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:05:25,816 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:25,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:25,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:05:25,840 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:91, output treesize:55 [2021-06-05 22:05:26,180 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:26,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358174314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:26,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:26,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:05:26,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991236728] [2021-06-05 22:05:26,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:05:26,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:26,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:05:26,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:05:26,182 INFO L87 Difference]: Start difference. First operand 442 states and 1352 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:26,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:26,534 INFO L93 Difference]: Finished difference Result 830 states and 2406 transitions. [2021-06-05 22:05:26,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:05:26,534 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:26,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:26,537 INFO L225 Difference]: With dead ends: 830 [2021-06-05 22:05:26,537 INFO L226 Difference]: Without dead ends: 687 [2021-06-05 22:05:26,538 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 463.9ms TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:05:26,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2021-06-05 22:05:26,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 452. [2021-06-05 22:05:26,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 451 states have (on average 3.0776053215077606) internal successors, (1388), 451 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:26,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 1388 transitions. [2021-06-05 22:05:26,548 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 1388 transitions. Word has length 20 [2021-06-05 22:05:26,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:26,548 INFO L482 AbstractCegarLoop]: Abstraction has 452 states and 1388 transitions. [2021-06-05 22:05:26,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:26,548 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 1388 transitions. [2021-06-05 22:05:26,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:05:26,549 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:26,549 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:26,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-06-05 22:05:26,772 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:26,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:26,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1463437194, now seen corresponding path program 13 times [2021-06-05 22:05:26,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:26,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136972991] [2021-06-05 22:05:26,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:26,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:26,859 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:26,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:26,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136972991] [2021-06-05 22:05:26,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136972991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:26,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514602114] [2021-06-05 22:05:26,860 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:26,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:26,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:05:26,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:27,119 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:27,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514602114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:27,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:27,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:05:27,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591832650] [2021-06-05 22:05:27,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:05:27,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:27,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:05:27,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:05:27,121 INFO L87 Difference]: Start difference. First operand 452 states and 1388 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:27,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:27,258 INFO L93 Difference]: Finished difference Result 595 states and 1752 transitions. [2021-06-05 22:05:27,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:05:27,259 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:05:27,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:27,260 INFO L225 Difference]: With dead ends: 595 [2021-06-05 22:05:27,260 INFO L226 Difference]: Without dead ends: 475 [2021-06-05 22:05:27,261 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 198.9ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:27,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-06-05 22:05:27,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 442. [2021-06-05 22:05:27,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 3.0657596371882088) internal successors, (1352), 441 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:27,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 1352 transitions. [2021-06-05 22:05:27,268 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 1352 transitions. Word has length 20 [2021-06-05 22:05:27,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:27,268 INFO L482 AbstractCegarLoop]: Abstraction has 442 states and 1352 transitions. [2021-06-05 22:05:27,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:27,268 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 1352 transitions. [2021-06-05 22:05:27,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:27,269 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:27,270 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:27,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:27,489 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:27,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:27,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1353227094, now seen corresponding path program 14 times [2021-06-05 22:05:27,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:27,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492599007] [2021-06-05 22:05:27,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:27,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:27,572 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:27,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:27,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492599007] [2021-06-05 22:05:27,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492599007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:27,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738718455] [2021-06-05 22:05:27,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:27,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:05:27,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:27,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 22:05:27,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:27,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:05:27,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:27,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:05:27,703 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:27,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:05:27,707 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:27,744 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-06-05 22:05:27,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:05:27,748 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:27,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:05:27,750 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:27,776 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-05 22:05:27,777 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:05:27,777 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-05 22:05:27,816 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:05:27,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738718455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:27,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:27,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 22:05:27,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975751360] [2021-06-05 22:05:27,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:05:27,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:27,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:05:27,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:05:27,817 INFO L87 Difference]: Start difference. First operand 442 states and 1352 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:27,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:27,988 INFO L93 Difference]: Finished difference Result 699 states and 2099 transitions. [2021-06-05 22:05:27,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:05:27,988 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:27,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:27,990 INFO L225 Difference]: With dead ends: 699 [2021-06-05 22:05:27,990 INFO L226 Difference]: Without dead ends: 648 [2021-06-05 22:05:27,990 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 169.3ms TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:05:27,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2021-06-05 22:05:27,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 421. [2021-06-05 22:05:27,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 3.0904761904761906) internal successors, (1298), 420 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:27,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 1298 transitions. [2021-06-05 22:05:27,999 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 1298 transitions. Word has length 21 [2021-06-05 22:05:27,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:28,000 INFO L482 AbstractCegarLoop]: Abstraction has 421 states and 1298 transitions. [2021-06-05 22:05:28,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:28,000 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 1298 transitions. [2021-06-05 22:05:28,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:28,001 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:28,001 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:28,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2021-06-05 22:05:28,217 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:28,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:28,217 INFO L82 PathProgramCache]: Analyzing trace with hash -2142789994, now seen corresponding path program 15 times [2021-06-05 22:05:28,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:28,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481183152] [2021-06-05 22:05:28,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:28,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:28,286 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:28,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:28,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481183152] [2021-06-05 22:05:28,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481183152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:28,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850763842] [2021-06-05 22:05:28,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:28,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:05:28,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:28,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 22:05:28,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:28,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:05:28,402 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:28,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:05:28,406 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:28,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:05:28,410 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:28,451 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-06-05 22:05:28,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:05:28,455 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:28,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:05:28,459 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:28,489 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-05 22:05:28,490 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:05:28,490 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-05 22:05:28,533 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:05:28,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850763842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:28,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:28,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 22:05:28,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857990800] [2021-06-05 22:05:28,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:05:28,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:28,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:05:28,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:05:28,535 INFO L87 Difference]: Start difference. First operand 421 states and 1298 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:28,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:28,771 INFO L93 Difference]: Finished difference Result 665 states and 2020 transitions. [2021-06-05 22:05:28,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:05:28,771 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:28,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:28,774 INFO L225 Difference]: With dead ends: 665 [2021-06-05 22:05:28,774 INFO L226 Difference]: Without dead ends: 614 [2021-06-05 22:05:28,775 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 196.6ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:05:28,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-06-05 22:05:28,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 432. [2021-06-05 22:05:28,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 3.1113689095127612) internal successors, (1341), 431 states have internal predecessors, (1341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:28,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1341 transitions. [2021-06-05 22:05:28,786 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1341 transitions. Word has length 21 [2021-06-05 22:05:28,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:28,786 INFO L482 AbstractCegarLoop]: Abstraction has 432 states and 1341 transitions. [2021-06-05 22:05:28,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:28,787 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1341 transitions. [2021-06-05 22:05:28,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:28,788 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:28,788 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:29,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:29,001 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:29,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:29,001 INFO L82 PathProgramCache]: Analyzing trace with hash -967299350, now seen corresponding path program 16 times [2021-06-05 22:05:29,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:29,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705636230] [2021-06-05 22:05:29,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:29,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:29,077 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:29,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:29,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705636230] [2021-06-05 22:05:29,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705636230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:29,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444139949] [2021-06-05 22:05:29,078 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:29,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:05:29,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:29,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 22:05:29,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:29,234 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:05:29,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444139949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:29,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:29,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-05 22:05:29,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011537246] [2021-06-05 22:05:29,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:05:29,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:29,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:05:29,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:05:29,236 INFO L87 Difference]: Start difference. First operand 432 states and 1341 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:29,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:29,453 INFO L93 Difference]: Finished difference Result 728 states and 2188 transitions. [2021-06-05 22:05:29,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:05:29,454 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:29,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:29,456 INFO L225 Difference]: With dead ends: 728 [2021-06-05 22:05:29,456 INFO L226 Difference]: Without dead ends: 677 [2021-06-05 22:05:29,456 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 196.5ms TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:05:29,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2021-06-05 22:05:29,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 443. [2021-06-05 22:05:29,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 3.1561085972850678) internal successors, (1395), 442 states have internal predecessors, (1395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:29,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 1395 transitions. [2021-06-05 22:05:29,464 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 1395 transitions. Word has length 21 [2021-06-05 22:05:29,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:29,464 INFO L482 AbstractCegarLoop]: Abstraction has 443 states and 1395 transitions. [2021-06-05 22:05:29,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:29,465 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 1395 transitions. [2021-06-05 22:05:29,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:29,466 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:29,466 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:29,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2021-06-05 22:05:29,674 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:29,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:29,674 INFO L82 PathProgramCache]: Analyzing trace with hash 646267384, now seen corresponding path program 17 times [2021-06-05 22:05:29,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:29,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039459163] [2021-06-05 22:05:29,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:29,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:29,753 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:29,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:29,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039459163] [2021-06-05 22:05:29,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039459163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:29,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140139364] [2021-06-05 22:05:29,753 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:29,791 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:05:29,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:29,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 22:05:29,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:29,924 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:05:29,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140139364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:29,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:29,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 22:05:29,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646100579] [2021-06-05 22:05:29,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:05:29,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:29,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:05:29,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:05:29,925 INFO L87 Difference]: Start difference. First operand 443 states and 1395 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:30,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:30,226 INFO L93 Difference]: Finished difference Result 654 states and 1967 transitions. [2021-06-05 22:05:30,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:05:30,227 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:30,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:30,229 INFO L225 Difference]: With dead ends: 654 [2021-06-05 22:05:30,229 INFO L226 Difference]: Without dead ends: 591 [2021-06-05 22:05:30,229 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 266.7ms TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:05:30,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-06-05 22:05:30,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 413. [2021-06-05 22:05:30,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.0728155339805827) internal successors, (1266), 412 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:30,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1266 transitions. [2021-06-05 22:05:30,238 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1266 transitions. Word has length 21 [2021-06-05 22:05:30,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:30,238 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 1266 transitions. [2021-06-05 22:05:30,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:30,238 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1266 transitions. [2021-06-05 22:05:30,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:30,239 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:30,239 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:30,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-06-05 22:05:30,449 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:30,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:30,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1289968066, now seen corresponding path program 18 times [2021-06-05 22:05:30,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:30,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441194673] [2021-06-05 22:05:30,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:30,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:30,552 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:30,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:30,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441194673] [2021-06-05 22:05:30,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441194673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:30,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95545299] [2021-06-05 22:05:30,552 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:30,607 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:05:30,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:30,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:05:30,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:30,753 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:30,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95545299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:30,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:30,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 22:05:30,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266282806] [2021-06-05 22:05:30,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:05:30,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:30,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:05:30,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:05:30,754 INFO L87 Difference]: Start difference. First operand 413 states and 1266 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:31,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:31,152 INFO L93 Difference]: Finished difference Result 864 states and 2562 transitions. [2021-06-05 22:05:31,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:05:31,153 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:31,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:31,155 INFO L225 Difference]: With dead ends: 864 [2021-06-05 22:05:31,155 INFO L226 Difference]: Without dead ends: 812 [2021-06-05 22:05:31,156 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 367.2ms TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:05:31,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-06-05 22:05:31,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 458. [2021-06-05 22:05:31,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 3.1684901531728666) internal successors, (1448), 457 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:31,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1448 transitions. [2021-06-05 22:05:31,166 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1448 transitions. Word has length 21 [2021-06-05 22:05:31,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:31,167 INFO L482 AbstractCegarLoop]: Abstraction has 458 states and 1448 transitions. [2021-06-05 22:05:31,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:31,167 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1448 transitions. [2021-06-05 22:05:31,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:31,168 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:31,168 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:31,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:31,385 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:31,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:31,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1898744654, now seen corresponding path program 19 times [2021-06-05 22:05:31,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:31,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957592937] [2021-06-05 22:05:31,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:31,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:31,480 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:31,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:31,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957592937] [2021-06-05 22:05:31,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957592937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:31,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247201293] [2021-06-05 22:05:31,480 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:31,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:31,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:05:31,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:31,690 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:31,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247201293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:31,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:31,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 22:05:31,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489726379] [2021-06-05 22:05:31,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:05:31,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:31,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:05:31,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:05:31,691 INFO L87 Difference]: Start difference. First operand 458 states and 1448 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:32,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:32,249 INFO L93 Difference]: Finished difference Result 906 states and 2628 transitions. [2021-06-05 22:05:32,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:05:32,249 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:32,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:32,251 INFO L225 Difference]: With dead ends: 906 [2021-06-05 22:05:32,251 INFO L226 Difference]: Without dead ends: 837 [2021-06-05 22:05:32,251 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 512.7ms TimeCoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:05:32,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2021-06-05 22:05:32,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 464. [2021-06-05 22:05:32,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.1295896328293735) internal successors, (1449), 463 states have internal predecessors, (1449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:32,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1449 transitions. [2021-06-05 22:05:32,262 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1449 transitions. Word has length 21 [2021-06-05 22:05:32,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:32,262 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 1449 transitions. [2021-06-05 22:05:32,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:32,262 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1449 transitions. [2021-06-05 22:05:32,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:32,263 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:32,263 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:32,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable348 [2021-06-05 22:05:32,481 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:32,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:32,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1066038364, now seen corresponding path program 20 times [2021-06-05 22:05:32,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:32,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066118769] [2021-06-05 22:05:32,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:32,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:32,565 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:32,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:32,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066118769] [2021-06-05 22:05:32,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066118769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:32,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079837576] [2021-06-05 22:05:32,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:32,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:05:32,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:32,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:05:32,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:32,774 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:32,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079837576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:32,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:32,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 22:05:32,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744451999] [2021-06-05 22:05:32,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:32,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:32,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:32,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:32,776 INFO L87 Difference]: Start difference. First operand 464 states and 1449 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:33,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:33,192 INFO L93 Difference]: Finished difference Result 795 states and 2331 transitions. [2021-06-05 22:05:33,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:05:33,193 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:33,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:33,198 INFO L225 Difference]: With dead ends: 795 [2021-06-05 22:05:33,198 INFO L226 Difference]: Without dead ends: 713 [2021-06-05 22:05:33,198 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 414.5ms TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:05:33,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-06-05 22:05:33,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 471. [2021-06-05 22:05:33,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 3.0914893617021275) internal successors, (1453), 470 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:33,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1453 transitions. [2021-06-05 22:05:33,206 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1453 transitions. Word has length 21 [2021-06-05 22:05:33,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:33,206 INFO L482 AbstractCegarLoop]: Abstraction has 471 states and 1453 transitions. [2021-06-05 22:05:33,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:33,207 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1453 transitions. [2021-06-05 22:05:33,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:33,208 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:33,208 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:33,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable357 [2021-06-05 22:05:33,430 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:33,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:33,431 INFO L82 PathProgramCache]: Analyzing trace with hash 601158056, now seen corresponding path program 21 times [2021-06-05 22:05:33,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:33,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572015110] [2021-06-05 22:05:33,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:33,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:33,515 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:33,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:33,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572015110] [2021-06-05 22:05:33,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572015110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:33,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465731040] [2021-06-05 22:05:33,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:33,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:05:33,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:33,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:05:33,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:33,712 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:33,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465731040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:33,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:33,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 22:05:33,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123518084] [2021-06-05 22:05:33,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:05:33,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:33,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:05:33,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:05:33,714 INFO L87 Difference]: Start difference. First operand 471 states and 1453 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:34,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:34,088 INFO L93 Difference]: Finished difference Result 773 states and 2266 transitions. [2021-06-05 22:05:34,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:05:34,088 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:34,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:34,089 INFO L225 Difference]: With dead ends: 773 [2021-06-05 22:05:34,089 INFO L226 Difference]: Without dead ends: 672 [2021-06-05 22:05:34,090 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 385.1ms TimeCoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:05:34,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-06-05 22:05:34,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 462. [2021-06-05 22:05:34,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 3.0390455531453364) internal successors, (1401), 461 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:34,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 1401 transitions. [2021-06-05 22:05:34,098 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 1401 transitions. Word has length 21 [2021-06-05 22:05:34,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:34,098 INFO L482 AbstractCegarLoop]: Abstraction has 462 states and 1401 transitions. [2021-06-05 22:05:34,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:34,099 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 1401 transitions. [2021-06-05 22:05:34,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:34,100 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:34,100 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:34,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable366,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:34,309 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:34,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:34,309 INFO L82 PathProgramCache]: Analyzing trace with hash 454395940, now seen corresponding path program 22 times [2021-06-05 22:05:34,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:34,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676449389] [2021-06-05 22:05:34,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:34,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:34,404 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:34,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:34,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676449389] [2021-06-05 22:05:34,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676449389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:34,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120740185] [2021-06-05 22:05:34,404 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:34,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:05:34,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:34,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:05:34,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:34,591 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:34,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120740185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:34,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:34,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 22:05:34,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734495767] [2021-06-05 22:05:34,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:05:34,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:34,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:05:34,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:05:34,592 INFO L87 Difference]: Start difference. First operand 462 states and 1401 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:34,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:34,779 INFO L93 Difference]: Finished difference Result 807 states and 2396 transitions. [2021-06-05 22:05:34,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:05:34,780 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:34,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:34,781 INFO L225 Difference]: With dead ends: 807 [2021-06-05 22:05:34,781 INFO L226 Difference]: Without dead ends: 755 [2021-06-05 22:05:34,781 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 218.2ms TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:05:34,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2021-06-05 22:05:34,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 506. [2021-06-05 22:05:34,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 3.130693069306931) internal successors, (1581), 505 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:34,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1581 transitions. [2021-06-05 22:05:34,790 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1581 transitions. Word has length 21 [2021-06-05 22:05:34,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:34,790 INFO L482 AbstractCegarLoop]: Abstraction has 506 states and 1581 transitions. [2021-06-05 22:05:34,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:34,790 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1581 transitions. [2021-06-05 22:05:34,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:34,791 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:34,791 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:35,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2021-06-05 22:05:35,014 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:35,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:35,014 INFO L82 PathProgramCache]: Analyzing trace with hash -651858636, now seen corresponding path program 23 times [2021-06-05 22:05:35,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:35,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191055109] [2021-06-05 22:05:35,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:35,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:35,117 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:35,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:35,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191055109] [2021-06-05 22:05:35,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191055109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:35,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617705371] [2021-06-05 22:05:35,118 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:35,157 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:05:35,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:35,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:05:35,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:35,316 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:35,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617705371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:35,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:35,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 22:05:35,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271698053] [2021-06-05 22:05:35,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:05:35,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:35,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:05:35,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:05:35,317 INFO L87 Difference]: Start difference. First operand 506 states and 1581 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:35,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:35,724 INFO L93 Difference]: Finished difference Result 851 states and 2469 transitions. [2021-06-05 22:05:35,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:05:35,724 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:35,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:35,729 INFO L225 Difference]: With dead ends: 851 [2021-06-05 22:05:35,729 INFO L226 Difference]: Without dead ends: 782 [2021-06-05 22:05:35,729 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 384.5ms TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:05:35,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2021-06-05 22:05:35,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 491. [2021-06-05 22:05:35,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 3.0816326530612246) internal successors, (1510), 490 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:35,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 1510 transitions. [2021-06-05 22:05:35,740 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 1510 transitions. Word has length 21 [2021-06-05 22:05:35,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:35,740 INFO L482 AbstractCegarLoop]: Abstraction has 491 states and 1510 transitions. [2021-06-05 22:05:35,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:35,740 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 1510 transitions. [2021-06-05 22:05:35,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:35,741 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:35,741 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:35,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2021-06-05 22:05:35,964 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:35,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:35,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1484564926, now seen corresponding path program 24 times [2021-06-05 22:05:35,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:35,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336348521] [2021-06-05 22:05:35,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:35,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:36,084 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:36,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:36,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336348521] [2021-06-05 22:05:36,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336348521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:36,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813112833] [2021-06-05 22:05:36,085 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:36,139 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:05:36,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:36,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:05:36,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:36,302 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:36,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813112833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:36,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:36,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-06-05 22:05:36,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922181812] [2021-06-05 22:05:36,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:05:36,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:36,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:05:36,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:05:36,303 INFO L87 Difference]: Start difference. First operand 491 states and 1510 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:36,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:36,586 INFO L93 Difference]: Finished difference Result 682 states and 1999 transitions. [2021-06-05 22:05:36,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:05:36,587 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:36,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:36,588 INFO L225 Difference]: With dead ends: 682 [2021-06-05 22:05:36,588 INFO L226 Difference]: Without dead ends: 600 [2021-06-05 22:05:36,588 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 299.8ms TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:05:36,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2021-06-05 22:05:36,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 476. [2021-06-05 22:05:36,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 3.0442105263157893) internal successors, (1446), 475 states have internal predecessors, (1446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:36,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1446 transitions. [2021-06-05 22:05:36,598 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1446 transitions. Word has length 21 [2021-06-05 22:05:36,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:36,599 INFO L482 AbstractCegarLoop]: Abstraction has 476 states and 1446 transitions. [2021-06-05 22:05:36,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:36,599 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1446 transitions. [2021-06-05 22:05:36,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:36,600 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:36,600 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:36,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2021-06-05 22:05:36,823 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:36,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:36,823 INFO L82 PathProgramCache]: Analyzing trace with hash -818537768, now seen corresponding path program 25 times [2021-06-05 22:05:36,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:36,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25585272] [2021-06-05 22:05:36,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:36,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:36,941 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:36,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:36,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25585272] [2021-06-05 22:05:36,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25585272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:36,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745942413] [2021-06-05 22:05:36,942 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:36,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:36,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:05:36,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:37,083 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:37,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745942413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:37,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:37,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 22:05:37,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614693260] [2021-06-05 22:05:37,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:05:37,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:37,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:05:37,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:05:37,084 INFO L87 Difference]: Start difference. First operand 476 states and 1446 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:37,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:37,286 INFO L93 Difference]: Finished difference Result 853 states and 2541 transitions. [2021-06-05 22:05:37,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:05:37,286 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:37,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:37,287 INFO L225 Difference]: With dead ends: 853 [2021-06-05 22:05:37,287 INFO L226 Difference]: Without dead ends: 801 [2021-06-05 22:05:37,287 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 195.3ms TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:05:37,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2021-06-05 22:05:37,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 514. [2021-06-05 22:05:37,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 513 states have (on average 3.142300194931774) internal successors, (1612), 513 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:37,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 1612 transitions. [2021-06-05 22:05:37,302 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 1612 transitions. Word has length 21 [2021-06-05 22:05:37,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:37,302 INFO L482 AbstractCegarLoop]: Abstraction has 514 states and 1612 transitions. [2021-06-05 22:05:37,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:37,302 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 1612 transitions. [2021-06-05 22:05:37,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:37,303 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:37,303 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:37,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:37,521 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:37,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:37,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1924792344, now seen corresponding path program 26 times [2021-06-05 22:05:37,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:37,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441525166] [2021-06-05 22:05:37,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:37,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:37,612 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:37,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:37,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441525166] [2021-06-05 22:05:37,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441525166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:37,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078178367] [2021-06-05 22:05:37,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:37,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:05:37,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:37,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:05:37,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:37,761 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:37,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078178367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:37,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:37,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 22:05:37,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300649263] [2021-06-05 22:05:37,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:05:37,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:37,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:05:37,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:05:37,762 INFO L87 Difference]: Start difference. First operand 514 states and 1612 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:38,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:38,054 INFO L93 Difference]: Finished difference Result 772 states and 2308 transitions. [2021-06-05 22:05:38,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:05:38,054 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:38,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:38,056 INFO L225 Difference]: With dead ends: 772 [2021-06-05 22:05:38,056 INFO L226 Difference]: Without dead ends: 703 [2021-06-05 22:05:38,056 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 234.6ms TimeCoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:05:38,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2021-06-05 22:05:38,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 501. [2021-06-05 22:05:38,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 3.092) internal successors, (1546), 500 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:38,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 1546 transitions. [2021-06-05 22:05:38,063 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 1546 transitions. Word has length 21 [2021-06-05 22:05:38,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:38,063 INFO L482 AbstractCegarLoop]: Abstraction has 501 states and 1546 transitions. [2021-06-05 22:05:38,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:38,063 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 1546 transitions. [2021-06-05 22:05:38,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:38,064 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:38,065 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:38,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable416 [2021-06-05 22:05:38,267 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:38,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:38,267 INFO L82 PathProgramCache]: Analyzing trace with hash 941515172, now seen corresponding path program 27 times [2021-06-05 22:05:38,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:38,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622214281] [2021-06-05 22:05:38,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:38,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:38,349 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:38,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:38,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622214281] [2021-06-05 22:05:38,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622214281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:38,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463454676] [2021-06-05 22:05:38,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:38,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:05:38,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:38,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:05:38,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:38,500 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:38,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463454676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:38,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:38,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 22:05:38,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413033852] [2021-06-05 22:05:38,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:05:38,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:38,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:05:38,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:05:38,501 INFO L87 Difference]: Start difference. First operand 501 states and 1546 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:38,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:38,697 INFO L93 Difference]: Finished difference Result 688 states and 2059 transitions. [2021-06-05 22:05:38,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:05:38,697 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:38,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:38,699 INFO L225 Difference]: With dead ends: 688 [2021-06-05 22:05:38,699 INFO L226 Difference]: Without dead ends: 636 [2021-06-05 22:05:38,699 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 178.2ms TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:05:38,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-06-05 22:05:38,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 481. [2021-06-05 22:05:38,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 3.0625) internal successors, (1470), 480 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:38,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1470 transitions. [2021-06-05 22:05:38,708 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1470 transitions. Word has length 21 [2021-06-05 22:05:38,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:38,708 INFO L482 AbstractCegarLoop]: Abstraction has 481 states and 1470 transitions. [2021-06-05 22:05:38,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:38,708 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1470 transitions. [2021-06-05 22:05:38,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:38,709 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:38,709 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:38,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable424,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:38,910 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:38,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:38,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1149829974, now seen corresponding path program 28 times [2021-06-05 22:05:38,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:38,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477897928] [2021-06-05 22:05:38,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:38,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:39,069 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:39,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:39,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477897928] [2021-06-05 22:05:39,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477897928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:39,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464401009] [2021-06-05 22:05:39,070 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:39,110 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:05:39,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:39,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 22:05:39,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:39,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:05:39,173 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:39,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:39,188 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-05 22:05:39,188 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:24 [2021-06-05 22:05:39,346 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:05:39,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464401009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:39,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:39,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-06-05 22:05:39,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42572678] [2021-06-05 22:05:39,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:05:39,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:39,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:05:39,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:05:39,347 INFO L87 Difference]: Start difference. First operand 481 states and 1470 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:40,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:40,170 INFO L93 Difference]: Finished difference Result 800 states and 2393 transitions. [2021-06-05 22:05:40,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:05:40,171 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:40,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:40,172 INFO L225 Difference]: With dead ends: 800 [2021-06-05 22:05:40,172 INFO L226 Difference]: Without dead ends: 713 [2021-06-05 22:05:40,172 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 733.8ms TimeCoverageRelationStatistics Valid=193, Invalid=863, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:05:40,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-06-05 22:05:40,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 466. [2021-06-05 22:05:40,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 3.0602150537634407) internal successors, (1423), 465 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:40,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 1423 transitions. [2021-06-05 22:05:40,179 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 1423 transitions. Word has length 21 [2021-06-05 22:05:40,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:40,179 INFO L482 AbstractCegarLoop]: Abstraction has 466 states and 1423 transitions. [2021-06-05 22:05:40,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:40,179 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 1423 transitions. [2021-06-05 22:05:40,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:40,180 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:40,180 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:40,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable427 [2021-06-05 22:05:40,381 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:40,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:40,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1969646678, now seen corresponding path program 29 times [2021-06-05 22:05:40,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:40,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856256828] [2021-06-05 22:05:40,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:40,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:40,469 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:40,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:40,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856256828] [2021-06-05 22:05:40,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856256828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:40,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296138933] [2021-06-05 22:05:40,470 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:40,517 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:05:40,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:40,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 22:05:40,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:40,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:05:40,573 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:40,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:40,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-05 22:05:40,582 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:20 [2021-06-05 22:05:40,762 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:05:40,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296138933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:40,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:40,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-06-05 22:05:40,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643720235] [2021-06-05 22:05:40,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:05:40,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:40,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:05:40,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:05:40,763 INFO L87 Difference]: Start difference. First operand 466 states and 1423 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:40,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:40,926 INFO L93 Difference]: Finished difference Result 732 states and 2198 transitions. [2021-06-05 22:05:40,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:05:40,927 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:40,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:40,928 INFO L225 Difference]: With dead ends: 732 [2021-06-05 22:05:40,928 INFO L226 Difference]: Without dead ends: 680 [2021-06-05 22:05:40,928 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 209.9ms TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:05:40,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-06-05 22:05:40,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 480. [2021-06-05 22:05:40,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 3.1022964509394573) internal successors, (1486), 479 states have internal predecessors, (1486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:40,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1486 transitions. [2021-06-05 22:05:40,935 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1486 transitions. Word has length 21 [2021-06-05 22:05:40,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:40,935 INFO L482 AbstractCegarLoop]: Abstraction has 480 states and 1486 transitions. [2021-06-05 22:05:40,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:40,935 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1486 transitions. [2021-06-05 22:05:40,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:40,936 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:40,936 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:41,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:41,149 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:41,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:41,149 INFO L82 PathProgramCache]: Analyzing trace with hash -356079944, now seen corresponding path program 30 times [2021-06-05 22:05:41,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:41,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788062392] [2021-06-05 22:05:41,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:41,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:41,230 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:41,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:41,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788062392] [2021-06-05 22:05:41,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788062392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:41,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826203040] [2021-06-05 22:05:41,230 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:41,279 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:05:41,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:41,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 22:05:41,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:41,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:05:41,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:41,326 INFO L628 ElimStorePlain]: treesize reduction 2, result has 90.0 percent of original size [2021-06-05 22:05:41,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:05:41,327 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:18 [2021-06-05 22:05:41,489 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:05:41,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826203040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:41,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:41,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 22:05:41,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888528358] [2021-06-05 22:05:41,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:05:41,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:41,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:05:41,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:05:41,490 INFO L87 Difference]: Start difference. First operand 480 states and 1486 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:41,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:41,664 INFO L93 Difference]: Finished difference Result 663 states and 1991 transitions. [2021-06-05 22:05:41,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:05:41,664 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:41,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:41,666 INFO L225 Difference]: With dead ends: 663 [2021-06-05 22:05:41,666 INFO L226 Difference]: Without dead ends: 606 [2021-06-05 22:05:41,666 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 193.2ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:05:41,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2021-06-05 22:05:41,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 446. [2021-06-05 22:05:41,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 3.0584269662921346) internal successors, (1361), 445 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:41,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 1361 transitions. [2021-06-05 22:05:41,674 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 1361 transitions. Word has length 21 [2021-06-05 22:05:41,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:41,674 INFO L482 AbstractCegarLoop]: Abstraction has 446 states and 1361 transitions. [2021-06-05 22:05:41,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:41,674 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 1361 transitions. [2021-06-05 22:05:41,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:41,675 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:41,675 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:41,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable469 [2021-06-05 22:05:41,890 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:41,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:41,891 INFO L82 PathProgramCache]: Analyzing trace with hash 110824918, now seen corresponding path program 31 times [2021-06-05 22:05:41,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:41,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782426522] [2021-06-05 22:05:41,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:41,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:41,971 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:41,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:41,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782426522] [2021-06-05 22:05:41,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782426522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:41,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926133523] [2021-06-05 22:05:41,971 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:42,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:42,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 22:05:42,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:42,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:05:42,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:42,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:05:42,109 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:42,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:05:42,114 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:42,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:05:42,118 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:42,168 INFO L628 ElimStorePlain]: treesize reduction 40, result has 56.5 percent of original size [2021-06-05 22:05:42,169 INFO L518 ElimStorePlain]: Eliminatee ends_with_10 vanished before elimination [2021-06-05 22:05:42,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:05:42,170 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:107, output treesize:52 [2021-06-05 22:05:42,296 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:05:42,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926133523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:42,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:42,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 22:05:42,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391247272] [2021-06-05 22:05:42,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:05:42,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:42,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:05:42,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:05:42,299 INFO L87 Difference]: Start difference. First operand 446 states and 1361 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:42,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:42,498 INFO L93 Difference]: Finished difference Result 613 states and 1807 transitions. [2021-06-05 22:05:42,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:05:42,498 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:42,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:42,499 INFO L225 Difference]: With dead ends: 613 [2021-06-05 22:05:42,499 INFO L226 Difference]: Without dead ends: 561 [2021-06-05 22:05:42,499 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 254.5ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:05:42,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-06-05 22:05:42,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 431. [2021-06-05 22:05:42,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 3.041860465116279) internal successors, (1308), 430 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:42,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1308 transitions. [2021-06-05 22:05:42,507 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1308 transitions. Word has length 21 [2021-06-05 22:05:42,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:42,507 INFO L482 AbstractCegarLoop]: Abstraction has 431 states and 1308 transitions. [2021-06-05 22:05:42,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:42,508 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1308 transitions. [2021-06-05 22:05:42,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:42,508 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:42,509 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:42,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable491 [2021-06-05 22:05:42,731 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:42,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:42,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1724391652, now seen corresponding path program 32 times [2021-06-05 22:05:42,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:42,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10690159] [2021-06-05 22:05:42,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:42,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:42,902 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:42,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:42,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10690159] [2021-06-05 22:05:42,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10690159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:42,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777361255] [2021-06-05 22:05:42,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:42,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:05:42,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:42,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 22:05:42,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:43,163 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:05:43,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777361255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:43,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:43,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-06-05 22:05:43,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729134720] [2021-06-05 22:05:43,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:05:43,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:43,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:05:43,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:05:43,164 INFO L87 Difference]: Start difference. First operand 431 states and 1308 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:44,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:44,160 INFO L93 Difference]: Finished difference Result 819 states and 2339 transitions. [2021-06-05 22:05:44,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:05:44,160 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:44,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:44,162 INFO L225 Difference]: With dead ends: 819 [2021-06-05 22:05:44,162 INFO L226 Difference]: Without dead ends: 715 [2021-06-05 22:05:44,162 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 967.6ms TimeCoverageRelationStatistics Valid=178, Invalid=814, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:05:44,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2021-06-05 22:05:44,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 427. [2021-06-05 22:05:44,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 3.0) internal successors, (1278), 426 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:44,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1278 transitions. [2021-06-05 22:05:44,171 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1278 transitions. Word has length 21 [2021-06-05 22:05:44,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:44,171 INFO L482 AbstractCegarLoop]: Abstraction has 427 states and 1278 transitions. [2021-06-05 22:05:44,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:44,171 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1278 transitions. [2021-06-05 22:05:44,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:44,172 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:44,172 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:44,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:44,389 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:44,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:44,389 INFO L82 PathProgramCache]: Analyzing trace with hash -214051430, now seen corresponding path program 33 times [2021-06-05 22:05:44,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:44,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437040949] [2021-06-05 22:05:44,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:44,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:44,461 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:44,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:44,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437040949] [2021-06-05 22:05:44,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437040949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:44,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519051295] [2021-06-05 22:05:44,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:44,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:05:44,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:44,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 22:05:44,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:44,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:05:44,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:44,618 INFO L628 ElimStorePlain]: treesize reduction 28, result has 73.1 percent of original size [2021-06-05 22:05:44,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:05:44,622 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:44,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:05:44,626 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:44,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:05:44,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:05:44,655 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:05:44,694 INFO L628 ElimStorePlain]: treesize reduction 16, result has 75.4 percent of original size [2021-06-05 22:05:44,695 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:05:44,695 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:107, output treesize:49 [2021-06-05 22:05:44,815 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:44,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519051295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:44,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:44,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 22:05:44,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164618336] [2021-06-05 22:05:44,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:05:44,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:44,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:05:44,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:05:44,817 INFO L87 Difference]: Start difference. First operand 427 states and 1278 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:45,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:45,121 INFO L93 Difference]: Finished difference Result 542 states and 1584 transitions. [2021-06-05 22:05:45,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:05:45,121 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:45,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:45,122 INFO L225 Difference]: With dead ends: 542 [2021-06-05 22:05:45,122 INFO L226 Difference]: Without dead ends: 465 [2021-06-05 22:05:45,122 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 295.6ms TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:05:45,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-06-05 22:05:45,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 385. [2021-06-05 22:05:45,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 3.0) internal successors, (1152), 384 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:45,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1152 transitions. [2021-06-05 22:05:45,127 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1152 transitions. Word has length 21 [2021-06-05 22:05:45,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:45,127 INFO L482 AbstractCegarLoop]: Abstraction has 385 states and 1152 transitions. [2021-06-05 22:05:45,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:45,127 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1152 transitions. [2021-06-05 22:05:45,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:45,128 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:45,128 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:45,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable531 [2021-06-05 22:05:45,329 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:45,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:45,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1805824578, now seen corresponding path program 34 times [2021-06-05 22:05:45,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:45,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855604494] [2021-06-05 22:05:45,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:45,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:45,433 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:05:45,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:45,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855604494] [2021-06-05 22:05:45,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855604494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:45,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21414354] [2021-06-05 22:05:45,434 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:45,476 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:05:45,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:45,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:05:45,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:45,641 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:45,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21414354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:45,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:45,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 22:05:45,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35281668] [2021-06-05 22:05:45,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:05:45,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:45,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:05:45,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:05:45,642 INFO L87 Difference]: Start difference. First operand 385 states and 1152 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:46,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:46,730 INFO L93 Difference]: Finished difference Result 1027 states and 2935 transitions. [2021-06-05 22:05:46,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 22:05:46,730 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:46,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:46,732 INFO L225 Difference]: With dead ends: 1027 [2021-06-05 22:05:46,732 INFO L226 Difference]: Without dead ends: 876 [2021-06-05 22:05:46,732 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 945.1ms TimeCoverageRelationStatistics Valid=291, Invalid=1191, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:05:46,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2021-06-05 22:05:46,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 395. [2021-06-05 22:05:46,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 3.0076142131979697) internal successors, (1185), 394 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:46,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1185 transitions. [2021-06-05 22:05:46,742 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1185 transitions. Word has length 21 [2021-06-05 22:05:46,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:46,742 INFO L482 AbstractCegarLoop]: Abstraction has 395 states and 1185 transitions. [2021-06-05 22:05:46,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:46,742 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1185 transitions. [2021-06-05 22:05:46,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:46,743 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:46,743 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:46,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable548,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:46,957 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:46,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:46,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1761625290, now seen corresponding path program 35 times [2021-06-05 22:05:46,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:46,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568133763] [2021-06-05 22:05:46,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:46,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:47,064 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:47,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:47,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568133763] [2021-06-05 22:05:47,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568133763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:47,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626643334] [2021-06-05 22:05:47,065 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:47,106 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:05:47,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:47,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:05:47,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:47,213 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:47,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626643334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:47,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:47,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 22:05:47,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882382651] [2021-06-05 22:05:47,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:05:47,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:47,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:05:47,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:05:47,214 INFO L87 Difference]: Start difference. First operand 395 states and 1185 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:47,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:47,651 INFO L93 Difference]: Finished difference Result 561 states and 1670 transitions. [2021-06-05 22:05:47,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:05:47,651 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:47,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:47,652 INFO L225 Difference]: With dead ends: 561 [2021-06-05 22:05:47,652 INFO L226 Difference]: Without dead ends: 509 [2021-06-05 22:05:47,653 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 343.6ms TimeCoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:05:47,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-06-05 22:05:47,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 404. [2021-06-05 22:05:47,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 3.0124069478908186) internal successors, (1214), 403 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:47,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 1214 transitions. [2021-06-05 22:05:47,660 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 1214 transitions. Word has length 21 [2021-06-05 22:05:47,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:47,660 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 1214 transitions. [2021-06-05 22:05:47,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:47,660 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 1214 transitions. [2021-06-05 22:05:47,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:47,661 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:47,661 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:47,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable557 [2021-06-05 22:05:47,884 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:47,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:47,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1539064924, now seen corresponding path program 36 times [2021-06-05 22:05:47,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:47,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686304667] [2021-06-05 22:05:47,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:47,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:47,989 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:47,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:47,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686304667] [2021-06-05 22:05:47,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686304667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:47,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789100625] [2021-06-05 22:05:47,990 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:48,040 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:05:48,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:48,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:05:48,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:48,165 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:48,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789100625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:48,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:48,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 22:05:48,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437070435] [2021-06-05 22:05:48,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:05:48,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:48,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:05:48,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:05:48,166 INFO L87 Difference]: Start difference. First operand 404 states and 1214 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:48,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:48,443 INFO L93 Difference]: Finished difference Result 648 states and 1890 transitions. [2021-06-05 22:05:48,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:05:48,443 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:48,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:48,444 INFO L225 Difference]: With dead ends: 648 [2021-06-05 22:05:48,444 INFO L226 Difference]: Without dead ends: 579 [2021-06-05 22:05:48,444 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 255.0ms TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:05:48,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-06-05 22:05:48,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 433. [2021-06-05 22:05:48,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 3.0300925925925926) internal successors, (1309), 432 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:48,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1309 transitions. [2021-06-05 22:05:48,454 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1309 transitions. Word has length 21 [2021-06-05 22:05:48,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:48,454 INFO L482 AbstractCegarLoop]: Abstraction has 433 states and 1309 transitions. [2021-06-05 22:05:48,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:48,454 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1309 transitions. [2021-06-05 22:05:48,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:48,455 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:48,455 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:48,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable560,38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:48,678 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:48,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:48,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1609295264, now seen corresponding path program 37 times [2021-06-05 22:05:48,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:48,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559706984] [2021-06-05 22:05:48,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:48,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:48,784 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:48,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:48,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559706984] [2021-06-05 22:05:48,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559706984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:48,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858468595] [2021-06-05 22:05:48,785 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:48,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:48,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:05:48,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:48,970 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:48,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858468595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:48,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:48,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 22:05:48,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409289854] [2021-06-05 22:05:48,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:05:48,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:48,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:05:48,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:05:48,972 INFO L87 Difference]: Start difference. First operand 433 states and 1309 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:49,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:49,291 INFO L93 Difference]: Finished difference Result 583 states and 1717 transitions. [2021-06-05 22:05:49,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:05:49,291 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:49,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:49,292 INFO L225 Difference]: With dead ends: 583 [2021-06-05 22:05:49,292 INFO L226 Difference]: Without dead ends: 531 [2021-06-05 22:05:49,292 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 262.9ms TimeCoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:05:49,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-06-05 22:05:49,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 395. [2021-06-05 22:05:49,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 3.0076142131979697) internal successors, (1185), 394 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:49,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1185 transitions. [2021-06-05 22:05:49,297 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1185 transitions. Word has length 21 [2021-06-05 22:05:49,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:49,297 INFO L482 AbstractCegarLoop]: Abstraction has 395 states and 1185 transitions. [2021-06-05 22:05:49,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:49,297 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1185 transitions. [2021-06-05 22:05:49,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:49,298 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:49,298 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:49,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable568 [2021-06-05 22:05:49,498 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:49,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:49,499 INFO L82 PathProgramCache]: Analyzing trace with hash 927641802, now seen corresponding path program 38 times [2021-06-05 22:05:49,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:49,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144175366] [2021-06-05 22:05:49,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:49,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:49,589 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:05:49,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:49,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144175366] [2021-06-05 22:05:49,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144175366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:49,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397232576] [2021-06-05 22:05:49,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:49,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:05:49,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:49,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:05:49,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:49,813 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:05:49,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397232576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:49,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:49,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 22:05:49,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479689398] [2021-06-05 22:05:49,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:05:49,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:49,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:05:49,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:05:49,814 INFO L87 Difference]: Start difference. First operand 395 states and 1185 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:50,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:50,479 INFO L93 Difference]: Finished difference Result 659 states and 1867 transitions. [2021-06-05 22:05:50,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:05:50,480 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:50,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:50,481 INFO L225 Difference]: With dead ends: 659 [2021-06-05 22:05:50,481 INFO L226 Difference]: Without dead ends: 508 [2021-06-05 22:05:50,481 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 563.7ms TimeCoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:05:50,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-06-05 22:05:50,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 388. [2021-06-05 22:05:50,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 2.992248062015504) internal successors, (1158), 387 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:50,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1158 transitions. [2021-06-05 22:05:50,488 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1158 transitions. Word has length 21 [2021-06-05 22:05:50,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:50,488 INFO L482 AbstractCegarLoop]: Abstraction has 388 states and 1158 transitions. [2021-06-05 22:05:50,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:50,489 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1158 transitions. [2021-06-05 22:05:50,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:50,489 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:50,489 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:50,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable576 [2021-06-05 22:05:50,712 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:50,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:50,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1063950666, now seen corresponding path program 39 times [2021-06-05 22:05:50,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:50,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042101917] [2021-06-05 22:05:50,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:50,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:50,811 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:05:50,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:50,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042101917] [2021-06-05 22:05:50,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042101917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:50,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37778004] [2021-06-05 22:05:50,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:50,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:05:50,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:50,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:05:50,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:51,013 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:51,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37778004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:51,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:51,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 22:05:51,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973063589] [2021-06-05 22:05:51,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:05:51,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:51,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:05:51,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:05:51,014 INFO L87 Difference]: Start difference. First operand 388 states and 1158 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:52,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:52,151 INFO L93 Difference]: Finished difference Result 733 states and 2120 transitions. [2021-06-05 22:05:52,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 22:05:52,151 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:52,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:52,152 INFO L225 Difference]: With dead ends: 733 [2021-06-05 22:05:52,152 INFO L226 Difference]: Without dead ends: 590 [2021-06-05 22:05:52,153 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 936.8ms TimeCoverageRelationStatistics Valid=296, Invalid=1264, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:05:52,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-06-05 22:05:52,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 370. [2021-06-05 22:05:52,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 2.97289972899729) internal successors, (1097), 369 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:52,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1097 transitions. [2021-06-05 22:05:52,159 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1097 transitions. Word has length 21 [2021-06-05 22:05:52,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:52,160 INFO L482 AbstractCegarLoop]: Abstraction has 370 states and 1097 transitions. [2021-06-05 22:05:52,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:52,160 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1097 transitions. [2021-06-05 22:05:52,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:52,160 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:52,160 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:52,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable583,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:52,381 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:52,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:52,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1824010934, now seen corresponding path program 40 times [2021-06-05 22:05:52,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:52,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088342528] [2021-06-05 22:05:52,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:52,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:52,478 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:05:52,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:52,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088342528] [2021-06-05 22:05:52,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088342528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:52,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343989231] [2021-06-05 22:05:52,479 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:52,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:05:52,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:52,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:05:52,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:52,655 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:52,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343989231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:52,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:52,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 22:05:52,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769385754] [2021-06-05 22:05:52,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:05:52,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:52,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:05:52,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:05:52,656 INFO L87 Difference]: Start difference. First operand 370 states and 1097 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:53,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:53,624 INFO L93 Difference]: Finished difference Result 858 states and 2494 transitions. [2021-06-05 22:05:53,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 22:05:53,624 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:53,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:53,625 INFO L225 Difference]: With dead ends: 858 [2021-06-05 22:05:53,625 INFO L226 Difference]: Without dead ends: 761 [2021-06-05 22:05:53,626 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 728.1ms TimeCoverageRelationStatistics Valid=313, Invalid=1247, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:05:53,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2021-06-05 22:05:53,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 390. [2021-06-05 22:05:53,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.025706940874036) internal successors, (1177), 389 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:53,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1177 transitions. [2021-06-05 22:05:53,631 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1177 transitions. Word has length 21 [2021-06-05 22:05:53,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:53,632 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 1177 transitions. [2021-06-05 22:05:53,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:53,632 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1177 transitions. [2021-06-05 22:05:53,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:53,632 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:53,632 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:53,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:53,833 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:53,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:53,833 INFO L82 PathProgramCache]: Analyzing trace with hash -223501882, now seen corresponding path program 41 times [2021-06-05 22:05:53,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:53,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703869418] [2021-06-05 22:05:53,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:53,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:53,910 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:05:53,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:53,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703869418] [2021-06-05 22:05:53,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703869418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:53,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423664698] [2021-06-05 22:05:53,910 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:53,971 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:05:53,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:53,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:05:53,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:54,072 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:54,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423664698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:54,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:54,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 22:05:54,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633464302] [2021-06-05 22:05:54,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:05:54,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:54,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:05:54,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:05:54,074 INFO L87 Difference]: Start difference. First operand 390 states and 1177 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:54,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:54,973 INFO L93 Difference]: Finished difference Result 851 states and 2515 transitions. [2021-06-05 22:05:54,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:05:54,973 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:54,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:54,974 INFO L225 Difference]: With dead ends: 851 [2021-06-05 22:05:54,975 INFO L226 Difference]: Without dead ends: 742 [2021-06-05 22:05:54,975 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 682.1ms TimeCoverageRelationStatistics Valid=273, Invalid=1133, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:05:54,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2021-06-05 22:05:54,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 400. [2021-06-05 22:05:54,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 3.0526315789473686) internal successors, (1218), 399 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:54,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1218 transitions. [2021-06-05 22:05:54,983 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1218 transitions. Word has length 21 [2021-06-05 22:05:54,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:54,983 INFO L482 AbstractCegarLoop]: Abstraction has 400 states and 1218 transitions. [2021-06-05 22:05:54,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:54,984 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1218 transitions. [2021-06-05 22:05:54,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:54,984 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:54,984 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:55,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-06-05 22:05:55,207 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:55,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:55,207 INFO L82 PathProgramCache]: Analyzing trace with hash 59224522, now seen corresponding path program 42 times [2021-06-05 22:05:55,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:55,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069255467] [2021-06-05 22:05:55,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:55,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:55,292 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:05:55,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:55,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069255467] [2021-06-05 22:05:55,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069255467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:55,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461792667] [2021-06-05 22:05:55,292 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:55,349 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:05:55,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:55,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:05:55,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:55,476 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:55,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461792667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:55,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:55,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 22:05:55,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856255792] [2021-06-05 22:05:55,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:05:55,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:55,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:05:55,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:05:55,478 INFO L87 Difference]: Start difference. First operand 400 states and 1218 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:56,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:56,155 INFO L93 Difference]: Finished difference Result 777 states and 2233 transitions. [2021-06-05 22:05:56,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:05:56,155 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:56,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:56,156 INFO L225 Difference]: With dead ends: 777 [2021-06-05 22:05:56,157 INFO L226 Difference]: Without dead ends: 676 [2021-06-05 22:05:56,157 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 562.2ms TimeCoverageRelationStatistics Valid=199, Invalid=857, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:05:56,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-06-05 22:05:56,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 385. [2021-06-05 22:05:56,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 2.9817708333333335) internal successors, (1145), 384 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:56,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1145 transitions. [2021-06-05 22:05:56,163 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1145 transitions. Word has length 21 [2021-06-05 22:05:56,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:56,164 INFO L482 AbstractCegarLoop]: Abstraction has 385 states and 1145 transitions. [2021-06-05 22:05:56,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:56,164 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1145 transitions. [2021-06-05 22:05:56,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:05:56,164 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:56,164 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:56,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable601,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:56,365 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:56,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:56,365 INFO L82 PathProgramCache]: Analyzing trace with hash -191892094, now seen corresponding path program 43 times [2021-06-05 22:05:56,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:56,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770704703] [2021-06-05 22:05:56,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:56,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:56,428 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:05:56,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:56,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770704703] [2021-06-05 22:05:56,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770704703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:56,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765812223] [2021-06-05 22:05:56,428 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:56,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:56,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:05:56,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:56,561 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:05:56,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765812223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:56,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:56,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 22:05:56,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494982573] [2021-06-05 22:05:56,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:05:56,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:56,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:05:56,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:05:56,562 INFO L87 Difference]: Start difference. First operand 385 states and 1145 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:57,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:57,196 INFO L93 Difference]: Finished difference Result 528 states and 1542 transitions. [2021-06-05 22:05:57,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:05:57,197 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:05:57,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:57,197 INFO L225 Difference]: With dead ends: 528 [2021-06-05 22:05:57,197 INFO L226 Difference]: Without dead ends: 482 [2021-06-05 22:05:57,197 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 490.1ms TimeCoverageRelationStatistics Valid=208, Invalid=848, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:05:57,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-06-05 22:05:57,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 304. [2021-06-05 22:05:57,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.953795379537954) internal successors, (895), 303 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:57,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 895 transitions. [2021-06-05 22:05:57,202 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 895 transitions. Word has length 21 [2021-06-05 22:05:57,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:57,203 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 895 transitions. [2021-06-05 22:05:57,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:57,203 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 895 transitions. [2021-06-05 22:05:57,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:05:57,203 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:57,203 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:57,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable608,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:57,404 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:57,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:57,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1148844402, now seen corresponding path program 44 times [2021-06-05 22:05:57,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:57,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794021980] [2021-06-05 22:05:57,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:57,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:57,499 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:05:57,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:57,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794021980] [2021-06-05 22:05:57,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794021980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:57,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238799474] [2021-06-05 22:05:57,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:57,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:05:57,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:57,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:05:57,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:57,769 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:57,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238799474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:57,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:57,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 22:05:57,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297632291] [2021-06-05 22:05:57,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:05:57,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:57,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:05:57,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:05:57,770 INFO L87 Difference]: Start difference. First operand 304 states and 895 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:58,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:58,410 INFO L93 Difference]: Finished difference Result 791 states and 2249 transitions. [2021-06-05 22:05:58,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:05:58,411 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:05:58,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:58,411 INFO L225 Difference]: With dead ends: 791 [2021-06-05 22:05:58,412 INFO L226 Difference]: Without dead ends: 673 [2021-06-05 22:05:58,412 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 688.6ms TimeCoverageRelationStatistics Valid=193, Invalid=509, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:05:58,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2021-06-05 22:05:58,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 311. [2021-06-05 22:05:58,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.97741935483871) internal successors, (923), 310 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:58,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 923 transitions. [2021-06-05 22:05:58,417 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 923 transitions. Word has length 22 [2021-06-05 22:05:58,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:58,417 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 923 transitions. [2021-06-05 22:05:58,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:58,417 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 923 transitions. [2021-06-05 22:05:58,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:05:58,418 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:58,418 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:58,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable611 [2021-06-05 22:05:58,618 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:58,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:58,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1439910460, now seen corresponding path program 45 times [2021-06-05 22:05:58,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:58,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026424468] [2021-06-05 22:05:58,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:58,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:58,698 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:05:58,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:58,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026424468] [2021-06-05 22:05:58,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026424468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:58,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601932240] [2021-06-05 22:05:58,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:58,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:05:58,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:58,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 22:05:58,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:58,912 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:05:58,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601932240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:58,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:58,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 22:05:58,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013124813] [2021-06-05 22:05:58,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:05:58,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:58,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:05:58,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:05:58,913 INFO L87 Difference]: Start difference. First operand 311 states and 923 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:59,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:05:59,141 INFO L93 Difference]: Finished difference Result 694 states and 1967 transitions. [2021-06-05 22:05:59,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:05:59,141 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:05:59,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:05:59,142 INFO L225 Difference]: With dead ends: 694 [2021-06-05 22:05:59,142 INFO L226 Difference]: Without dead ends: 607 [2021-06-05 22:05:59,142 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 304.6ms TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:05:59,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-06-05 22:05:59,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 302. [2021-06-05 22:05:59,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 2.956810631229236) internal successors, (890), 301 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:59,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 890 transitions. [2021-06-05 22:05:59,147 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 890 transitions. Word has length 22 [2021-06-05 22:05:59,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:05:59,147 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 890 transitions. [2021-06-05 22:05:59,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:05:59,147 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 890 transitions. [2021-06-05 22:05:59,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:05:59,148 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:05:59,148 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:05:59,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable619,47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:59,369 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:05:59,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:05:59,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1043150932, now seen corresponding path program 46 times [2021-06-05 22:05:59,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:05:59,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229908931] [2021-06-05 22:05:59,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:05:59,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:05:59,444 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:59,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:05:59,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229908931] [2021-06-05 22:05:59,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229908931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:59,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146404667] [2021-06-05 22:05:59,444 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:05:59,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:05:59,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:05:59,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:05:59,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:05:59,745 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:05:59,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146404667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:05:59,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:05:59,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 22:05:59,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495930820] [2021-06-05 22:05:59,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:05:59,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:05:59,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:05:59,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:05:59,746 INFO L87 Difference]: Start difference. First operand 302 states and 890 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:00,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:00,524 INFO L93 Difference]: Finished difference Result 620 states and 1775 transitions. [2021-06-05 22:06:00,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:06:00,524 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:06:00,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:00,525 INFO L225 Difference]: With dead ends: 620 [2021-06-05 22:06:00,525 INFO L226 Difference]: Without dead ends: 510 [2021-06-05 22:06:00,525 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 811.2ms TimeCoverageRelationStatistics Valid=184, Invalid=628, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:06:00,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-06-05 22:06:00,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 269. [2021-06-05 22:06:00,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.966417910447761) internal successors, (795), 268 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:00,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 795 transitions. [2021-06-05 22:06:00,528 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 795 transitions. Word has length 22 [2021-06-05 22:06:00,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:00,528 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 795 transitions. [2021-06-05 22:06:00,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:00,529 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 795 transitions. [2021-06-05 22:06:00,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:06:00,529 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:00,529 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:00,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable630,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:00,730 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:00,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:00,730 INFO L82 PathProgramCache]: Analyzing trace with hash 942011964, now seen corresponding path program 47 times [2021-06-05 22:06:00,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:00,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950014092] [2021-06-05 22:06:00,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:00,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:00,801 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:06:00,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:00,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950014092] [2021-06-05 22:06:00,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950014092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:00,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948251085] [2021-06-05 22:06:00,802 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:00,861 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:06:00,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:00,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:06:00,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:01,085 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:01,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948251085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:01,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:01,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-06-05 22:06:01,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532868183] [2021-06-05 22:06:01,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:06:01,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:01,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:06:01,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:06:01,086 INFO L87 Difference]: Start difference. First operand 269 states and 795 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:02,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:02,433 INFO L93 Difference]: Finished difference Result 887 states and 2504 transitions. [2021-06-05 22:06:02,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:06:02,433 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:06:02,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:02,434 INFO L225 Difference]: With dead ends: 887 [2021-06-05 22:06:02,434 INFO L226 Difference]: Without dead ends: 635 [2021-06-05 22:06:02,435 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 1313.4ms TimeCoverageRelationStatistics Valid=353, Invalid=1207, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:06:02,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-06-05 22:06:02,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 269. [2021-06-05 22:06:02,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.9365671641791047) internal successors, (787), 268 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:02,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 787 transitions. [2021-06-05 22:06:02,439 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 787 transitions. Word has length 22 [2021-06-05 22:06:02,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:02,439 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 787 transitions. [2021-06-05 22:06:02,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:02,439 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 787 transitions. [2021-06-05 22:06:02,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:06:02,439 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:02,440 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:02,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable636,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:02,640 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:02,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:02,640 INFO L82 PathProgramCache]: Analyzing trace with hash 746481008, now seen corresponding path program 48 times [2021-06-05 22:06:02,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:02,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88332730] [2021-06-05 22:06:02,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:02,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:02,784 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:02,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:02,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88332730] [2021-06-05 22:06:02,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88332730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:02,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159919345] [2021-06-05 22:06:02,785 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:02,856 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:06:02,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:02,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:06:02,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:03,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:06:03,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:03,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:03,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:06:03,021 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:03,194 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2021-06-05 22:06:03,194 INFO L628 ElimStorePlain]: treesize reduction 36, result has 78.7 percent of original size [2021-06-05 22:06:03,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:06:03,201 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:03,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:03,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:06:03,289 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:03,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:06:03,295 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:03,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:03,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:06:03,364 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:03,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:06:03,368 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:03,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:03,426 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-06-05 22:06:03,426 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 8 variables, input treesize:199, output treesize:114 [2021-06-05 22:06:03,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:03,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:03,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:06:03,704 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:03,705 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:06:03,706 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:03,736 INFO L628 ElimStorePlain]: treesize reduction 20, result has 61.5 percent of original size [2021-06-05 22:06:03,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:06:03,739 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:03,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:03,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:06:03,752 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:79, output treesize:13 [2021-06-05 22:06:03,798 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:03,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159919345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:03,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:03,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 22:06:03,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609650543] [2021-06-05 22:06:03,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:06:03,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:03,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:06:03,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:06:03,799 INFO L87 Difference]: Start difference. First operand 269 states and 787 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:04,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:04,529 INFO L93 Difference]: Finished difference Result 639 states and 1819 transitions. [2021-06-05 22:06:04,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:06:04,530 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:06:04,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:04,531 INFO L225 Difference]: With dead ends: 639 [2021-06-05 22:06:04,531 INFO L226 Difference]: Without dead ends: 521 [2021-06-05 22:06:04,531 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 829.3ms TimeCoverageRelationStatistics Valid=200, Invalid=556, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:06:04,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-06-05 22:06:04,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 290. [2021-06-05 22:06:04,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.98961937716263) internal successors, (864), 289 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:04,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 864 transitions. [2021-06-05 22:06:04,535 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 864 transitions. Word has length 22 [2021-06-05 22:06:04,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:04,535 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 864 transitions. [2021-06-05 22:06:04,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:04,535 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 864 transitions. [2021-06-05 22:06:04,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:06:04,535 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:04,535 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:04,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable643 [2021-06-05 22:06:04,736 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:04,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:04,736 INFO L82 PathProgramCache]: Analyzing trace with hash -959731426, now seen corresponding path program 49 times [2021-06-05 22:06:04,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:04,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502223913] [2021-06-05 22:06:04,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:04,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:04,882 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:04,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:04,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502223913] [2021-06-05 22:06:04,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502223913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:04,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433229545] [2021-06-05 22:06:04,883 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:04,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:04,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:06:04,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:05,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:05,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:05,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:06:05,097 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:05,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:06:05,102 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:05,243 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2021-06-05 22:06:05,243 INFO L628 ElimStorePlain]: treesize reduction 36, result has 78.7 percent of original size [2021-06-05 22:06:05,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:06:05,248 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:05,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:06:05,252 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:05,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:05,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:06:05,316 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:05,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:06:05,321 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:05,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:05,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:06:05,403 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:05,457 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:05,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-06-05 22:06:05,461 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 8 variables, input treesize:199, output treesize:114 [2021-06-05 22:06:05,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:06:05,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:05,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:05,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:06:05,702 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:05,783 INFO L628 ElimStorePlain]: treesize reduction 78, result has 46.2 percent of original size [2021-06-05 22:06:05,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:06:05,792 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:05,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:05,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:06:05,824 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:05,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:05,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:06:05,855 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:05,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:05,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:06:05,883 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:157, output treesize:25 [2021-06-05 22:06:05,961 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:05,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433229545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:05,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:05,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 22:06:05,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107850746] [2021-06-05 22:06:05,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:06:05,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:05,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:06:05,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:06:05,961 INFO L87 Difference]: Start difference. First operand 290 states and 864 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:07,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:07,968 INFO L93 Difference]: Finished difference Result 703 states and 1960 transitions. [2021-06-05 22:06:07,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:06:07,969 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:06:07,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:07,969 INFO L225 Difference]: With dead ends: 703 [2021-06-05 22:06:07,969 INFO L226 Difference]: Without dead ends: 541 [2021-06-05 22:06:07,969 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1889.6ms TimeCoverageRelationStatistics Valid=288, Invalid=972, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:06:07,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-06-05 22:06:07,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 283. [2021-06-05 22:06:07,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.9645390070921986) internal successors, (836), 282 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:07,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 836 transitions. [2021-06-05 22:06:07,973 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 836 transitions. Word has length 22 [2021-06-05 22:06:07,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:07,973 INFO L482 AbstractCegarLoop]: Abstraction has 283 states and 836 transitions. [2021-06-05 22:06:07,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:07,974 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 836 transitions. [2021-06-05 22:06:07,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:06:07,974 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:07,974 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:08,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable675 [2021-06-05 22:06:08,175 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:08,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:08,175 INFO L82 PathProgramCache]: Analyzing trace with hash 205767280, now seen corresponding path program 50 times [2021-06-05 22:06:08,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:08,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67329606] [2021-06-05 22:06:08,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:08,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:08,380 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:08,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:08,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67329606] [2021-06-05 22:06:08,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67329606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:08,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115443305] [2021-06-05 22:06:08,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:08,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:06:08,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:08,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:06:08,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:08,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:06:08,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:08,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:08,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:06:08,652 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:08,791 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-06-05 22:06:08,792 INFO L628 ElimStorePlain]: treesize reduction 32, result has 79.7 percent of original size [2021-06-05 22:06:08,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:06:08,797 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:08,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:08,862 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 5 xjuncts. [2021-06-05 22:06:08,862 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:170, output treesize:120 [2021-06-05 22:06:09,075 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:09,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115443305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:09,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:09,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-05 22:06:09,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421745324] [2021-06-05 22:06:09,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:06:09,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:09,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:06:09,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:06:09,076 INFO L87 Difference]: Start difference. First operand 283 states and 836 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:09,632 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 50 [2021-06-05 22:06:10,020 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 50 [2021-06-05 22:06:10,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:10,286 INFO L93 Difference]: Finished difference Result 463 states and 1318 transitions. [2021-06-05 22:06:10,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:06:10,286 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:06:10,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:10,286 INFO L225 Difference]: With dead ends: 463 [2021-06-05 22:06:10,286 INFO L226 Difference]: Without dead ends: 323 [2021-06-05 22:06:10,287 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1288.8ms TimeCoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:06:10,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-06-05 22:06:10,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 276. [2021-06-05 22:06:10,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.938181818181818) internal successors, (808), 275 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:10,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 808 transitions. [2021-06-05 22:06:10,290 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 808 transitions. Word has length 22 [2021-06-05 22:06:10,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:10,290 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 808 transitions. [2021-06-05 22:06:10,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:10,290 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 808 transitions. [2021-06-05 22:06:10,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:06:10,290 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:10,290 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:10,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable712 [2021-06-05 22:06:10,491 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:10,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:10,491 INFO L82 PathProgramCache]: Analyzing trace with hash -388078088, now seen corresponding path program 51 times [2021-06-05 22:06:10,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:10,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231542780] [2021-06-05 22:06:10,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:10,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:10,596 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:10,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:10,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231542780] [2021-06-05 22:06:10,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231542780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:10,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941195542] [2021-06-05 22:06:10,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:10,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:06:10,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:10,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:06:10,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:10,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:10,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:10,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:06:10,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:10,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:10,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:10,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:06:10,840 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:10,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:06:10,843 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:10,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:06:10,847 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:10,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:06:10,850 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:10,852 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:06:10,853 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:10,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:10,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:10,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:06:10,857 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:10,859 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:06:10,860 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:10,925 INFO L628 ElimStorePlain]: treesize reduction 23, result has 76.3 percent of original size [2021-06-05 22:06:10,928 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 22:06:10,928 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 2 variables, input treesize:199, output treesize:66 [2021-06-05 22:06:11,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:06:11,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:11,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:11,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:06:11,106 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:11,140 INFO L628 ElimStorePlain]: treesize reduction 35, result has 47.8 percent of original size [2021-06-05 22:06:11,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:06:11,144 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:11,155 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:11,156 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:06:11,156 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:79, output treesize:13 [2021-06-05 22:06:11,200 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:11,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941195542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:11,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:11,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 22:06:11,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218262506] [2021-06-05 22:06:11,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:06:11,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:11,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:06:11,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:06:11,201 INFO L87 Difference]: Start difference. First operand 276 states and 808 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:11,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:11,816 INFO L93 Difference]: Finished difference Result 730 states and 2080 transitions. [2021-06-05 22:06:11,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:06:11,816 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:06:11,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:11,817 INFO L225 Difference]: With dead ends: 730 [2021-06-05 22:06:11,817 INFO L226 Difference]: Without dead ends: 612 [2021-06-05 22:06:11,817 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 636.1ms TimeCoverageRelationStatistics Valid=192, Invalid=510, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:06:11,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-06-05 22:06:11,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 304. [2021-06-05 22:06:11,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.036303630363036) internal successors, (920), 303 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:11,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 920 transitions. [2021-06-05 22:06:11,822 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 920 transitions. Word has length 22 [2021-06-05 22:06:11,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:11,822 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 920 transitions. [2021-06-05 22:06:11,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:11,822 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 920 transitions. [2021-06-05 22:06:11,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:06:11,823 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:11,823 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:12,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable740 [2021-06-05 22:06:12,025 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:12,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:12,025 INFO L82 PathProgramCache]: Analyzing trace with hash -2094290522, now seen corresponding path program 52 times [2021-06-05 22:06:12,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:12,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420885667] [2021-06-05 22:06:12,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:12,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:12,159 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:12,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:12,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420885667] [2021-06-05 22:06:12,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420885667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:12,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048611161] [2021-06-05 22:06:12,159 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:12,230 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:06:12,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:12,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:06:12,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:12,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:12,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:12,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:06:12,363 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:12,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:06:12,367 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:12,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:06:12,372 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:12,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:12,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:06:12,376 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:12,451 INFO L628 ElimStorePlain]: treesize reduction 19, result has 79.6 percent of original size [2021-06-05 22:06:12,454 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 22:06:12,454 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:132, output treesize:66 [2021-06-05 22:06:12,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:06:12,647 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:12,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:06:12,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:06:12,652 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:12,722 INFO L628 ElimStorePlain]: treesize reduction 57, result has 49.1 percent of original size [2021-06-05 22:06:12,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:06:12,726 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:12,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:12,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:06:12,754 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:06:12,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:06:12,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:06:12,779 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:124, output treesize:24 [2021-06-05 22:06:12,859 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:12,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048611161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:12,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:12,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 22:06:12,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226700044] [2021-06-05 22:06:12,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:06:12,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:12,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:06:12,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:06:12,860 INFO L87 Difference]: Start difference. First operand 304 states and 920 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:14,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:14,340 INFO L93 Difference]: Finished difference Result 858 states and 2428 transitions. [2021-06-05 22:06:14,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:06:14,341 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:06:14,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:14,341 INFO L225 Difference]: With dead ends: 858 [2021-06-05 22:06:14,341 INFO L226 Difference]: Without dead ends: 643 [2021-06-05 22:06:14,341 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 1408.1ms TimeCoverageRelationStatistics Valid=284, Invalid=838, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:06:14,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-06-05 22:06:14,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 317. [2021-06-05 22:06:14,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.990506329113924) internal successors, (945), 316 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:14,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 945 transitions. [2021-06-05 22:06:14,346 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 945 transitions. Word has length 22 [2021-06-05 22:06:14,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:14,346 INFO L482 AbstractCegarLoop]: Abstraction has 317 states and 945 transitions. [2021-06-05 22:06:14,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:14,347 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 945 transitions. [2021-06-05 22:06:14,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:06:14,347 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:14,347 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:14,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable798 [2021-06-05 22:06:14,548 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:14,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:14,548 INFO L82 PathProgramCache]: Analyzing trace with hash 129512560, now seen corresponding path program 53 times [2021-06-05 22:06:14,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:14,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765500453] [2021-06-05 22:06:14,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:14,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:14,689 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:14,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:14,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765500453] [2021-06-05 22:06:14,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765500453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:14,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185856369] [2021-06-05 22:06:14,690 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:14,735 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:06:14,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:14,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:06:14,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:14,870 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:14,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185856369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:14,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:14,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 22:06:14,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753492824] [2021-06-05 22:06:14,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:06:14,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:14,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:06:14,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:06:14,871 INFO L87 Difference]: Start difference. First operand 317 states and 945 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:15,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:15,493 INFO L93 Difference]: Finished difference Result 594 states and 1685 transitions. [2021-06-05 22:06:15,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:06:15,493 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:06:15,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:15,494 INFO L225 Difference]: With dead ends: 594 [2021-06-05 22:06:15,494 INFO L226 Difference]: Without dead ends: 435 [2021-06-05 22:06:15,494 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 673.1ms TimeCoverageRelationStatistics Valid=211, Invalid=719, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:06:15,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-06-05 22:06:15,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 304. [2021-06-05 22:06:15,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.943894389438944) internal successors, (892), 303 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:15,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 892 transitions. [2021-06-05 22:06:15,497 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 892 transitions. Word has length 22 [2021-06-05 22:06:15,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:15,497 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 892 transitions. [2021-06-05 22:06:15,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:15,497 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 892 transitions. [2021-06-05 22:06:15,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:06:15,498 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:15,498 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:15,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable850 [2021-06-05 22:06:15,701 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:15,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:15,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1694127950, now seen corresponding path program 54 times [2021-06-05 22:06:15,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:15,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536121604] [2021-06-05 22:06:15,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:15,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:15,769 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:15,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:15,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536121604] [2021-06-05 22:06:15,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536121604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:15,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802981217] [2021-06-05 22:06:15,770 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:15,841 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:06:15,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:15,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:06:15,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:15,950 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:15,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802981217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:15,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:15,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 22:06:15,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776867168] [2021-06-05 22:06:15,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:06:15,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:15,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:06:15,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:06:15,952 INFO L87 Difference]: Start difference. First operand 304 states and 892 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:16,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:16,185 INFO L93 Difference]: Finished difference Result 485 states and 1424 transitions. [2021-06-05 22:06:16,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:06:16,185 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:06:16,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:16,186 INFO L225 Difference]: With dead ends: 485 [2021-06-05 22:06:16,186 INFO L226 Difference]: Without dead ends: 485 [2021-06-05 22:06:16,186 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 191.7ms TimeCoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:06:16,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-06-05 22:06:16,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 319. [2021-06-05 22:06:16,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.9465408805031448) internal successors, (937), 318 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:16,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 937 transitions. [2021-06-05 22:06:16,190 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 937 transitions. Word has length 22 [2021-06-05 22:06:16,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:16,190 INFO L482 AbstractCegarLoop]: Abstraction has 319 states and 937 transitions. [2021-06-05 22:06:16,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:16,190 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 937 transitions. [2021-06-05 22:06:16,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:06:16,190 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:16,190 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:16,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable855,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:16,391 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:16,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:16,391 INFO L82 PathProgramCache]: Analyzing trace with hash -541317644, now seen corresponding path program 55 times [2021-06-05 22:06:16,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:16,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58048812] [2021-06-05 22:06:16,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:16,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:16,464 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:16,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:16,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58048812] [2021-06-05 22:06:16,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58048812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:16,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452820591] [2021-06-05 22:06:16,465 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:16,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:16,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:06:16,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:16,659 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:16,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452820591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:16,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:16,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:06:16,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430696022] [2021-06-05 22:06:16,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:06:16,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:16,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:06:16,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:06:16,660 INFO L87 Difference]: Start difference. First operand 319 states and 937 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:16,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:16,987 INFO L93 Difference]: Finished difference Result 594 states and 1723 transitions. [2021-06-05 22:06:16,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:06:16,987 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:06:16,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:16,988 INFO L225 Difference]: With dead ends: 594 [2021-06-05 22:06:16,988 INFO L226 Difference]: Without dead ends: 594 [2021-06-05 22:06:16,988 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 268.6ms TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:06:16,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-06-05 22:06:16,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 331. [2021-06-05 22:06:16,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.984848484848485) internal successors, (985), 330 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:16,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 985 transitions. [2021-06-05 22:06:16,992 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 985 transitions. Word has length 22 [2021-06-05 22:06:16,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:16,992 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 985 transitions. [2021-06-05 22:06:16,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:16,992 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 985 transitions. [2021-06-05 22:06:16,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:06:16,993 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:16,993 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:17,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable859,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:17,197 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:17,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:17,197 INFO L82 PathProgramCache]: Analyzing trace with hash 953285320, now seen corresponding path program 56 times [2021-06-05 22:06:17,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:17,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472595054] [2021-06-05 22:06:17,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:17,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:17,296 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:17,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:17,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472595054] [2021-06-05 22:06:17,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472595054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:17,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875374827] [2021-06-05 22:06:17,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:17,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:06:17,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:17,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:06:17,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:17,452 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:17,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875374827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:17,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:17,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:06:17,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140813881] [2021-06-05 22:06:17,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:06:17,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:17,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:06:17,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:06:17,453 INFO L87 Difference]: Start difference. First operand 331 states and 985 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:17,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:17,686 INFO L93 Difference]: Finished difference Result 573 states and 1658 transitions. [2021-06-05 22:06:17,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:06:17,686 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:06:17,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:17,687 INFO L225 Difference]: With dead ends: 573 [2021-06-05 22:06:17,687 INFO L226 Difference]: Without dead ends: 563 [2021-06-05 22:06:17,687 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 234.1ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:06:17,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-06-05 22:06:17,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 338. [2021-06-05 22:06:17,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.964391691394659) internal successors, (999), 337 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:17,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 999 transitions. [2021-06-05 22:06:17,693 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 999 transitions. Word has length 22 [2021-06-05 22:06:17,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:17,693 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 999 transitions. [2021-06-05 22:06:17,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:17,693 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 999 transitions. [2021-06-05 22:06:17,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:06:17,693 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:17,693 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:17,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable865,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:17,894 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:17,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:17,894 INFO L82 PathProgramCache]: Analyzing trace with hash 634173000, now seen corresponding path program 57 times [2021-06-05 22:06:17,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:17,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806296966] [2021-06-05 22:06:17,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:17,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:17,965 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:17,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:17,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806296966] [2021-06-05 22:06:17,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806296966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:17,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285825401] [2021-06-05 22:06:17,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:18,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:06:18,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:18,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:06:18,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:18,154 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:18,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285825401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:18,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:18,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:06:18,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766541926] [2021-06-05 22:06:18,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:06:18,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:18,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:06:18,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:06:18,155 INFO L87 Difference]: Start difference. First operand 338 states and 999 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:18,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:18,419 INFO L93 Difference]: Finished difference Result 506 states and 1487 transitions. [2021-06-05 22:06:18,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:06:18,420 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:06:18,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:18,420 INFO L225 Difference]: With dead ends: 506 [2021-06-05 22:06:18,420 INFO L226 Difference]: Without dead ends: 506 [2021-06-05 22:06:18,420 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 223.3ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:06:18,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-06-05 22:06:18,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 319. [2021-06-05 22:06:18,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.9465408805031448) internal successors, (937), 318 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:18,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 937 transitions. [2021-06-05 22:06:18,424 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 937 transitions. Word has length 22 [2021-06-05 22:06:18,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:18,424 INFO L482 AbstractCegarLoop]: Abstraction has 319 states and 937 transitions. [2021-06-05 22:06:18,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:18,424 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 937 transitions. [2021-06-05 22:06:18,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:06:18,425 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:18,425 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:18,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable871 [2021-06-05 22:06:18,625 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:18,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:18,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1424442098, now seen corresponding path program 58 times [2021-06-05 22:06:18,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:18,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409920534] [2021-06-05 22:06:18,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:18,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:18,695 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:18,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:18,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409920534] [2021-06-05 22:06:18,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409920534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:18,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530190533] [2021-06-05 22:06:18,696 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:18,755 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:06:18,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:18,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:06:18,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:18,866 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:18,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530190533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:18,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:18,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:06:18,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963767230] [2021-06-05 22:06:18,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:06:18,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:18,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:06:18,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:06:18,868 INFO L87 Difference]: Start difference. First operand 319 states and 937 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:19,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:19,158 INFO L93 Difference]: Finished difference Result 458 states and 1333 transitions. [2021-06-05 22:06:19,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:06:19,158 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:06:19,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:19,159 INFO L225 Difference]: With dead ends: 458 [2021-06-05 22:06:19,159 INFO L226 Difference]: Without dead ends: 458 [2021-06-05 22:06:19,159 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 276.0ms TimeCoverageRelationStatistics Valid=171, Invalid=479, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:06:19,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-06-05 22:06:19,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 328. [2021-06-05 22:06:19,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.9663608562691133) internal successors, (970), 327 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:19,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 970 transitions. [2021-06-05 22:06:19,163 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 970 transitions. Word has length 22 [2021-06-05 22:06:19,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:19,163 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 970 transitions. [2021-06-05 22:06:19,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:19,163 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 970 transitions. [2021-06-05 22:06:19,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:06:19,163 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:19,163 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:19,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable874,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:19,364 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:19,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:19,364 INFO L82 PathProgramCache]: Analyzing trace with hash 70160866, now seen corresponding path program 59 times [2021-06-05 22:06:19,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:19,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104559268] [2021-06-05 22:06:19,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:19,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:19,432 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:19,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:19,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104559268] [2021-06-05 22:06:19,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104559268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:19,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551941377] [2021-06-05 22:06:19,433 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:19,494 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:06:19,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:19,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:06:19,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:19,628 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:19,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551941377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:19,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:19,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:06:19,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897552551] [2021-06-05 22:06:19,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:06:19,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:19,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:06:19,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:06:19,630 INFO L87 Difference]: Start difference. First operand 328 states and 970 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:19,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:19,859 INFO L93 Difference]: Finished difference Result 475 states and 1370 transitions. [2021-06-05 22:06:19,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:06:19,860 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:06:19,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:19,860 INFO L225 Difference]: With dead ends: 475 [2021-06-05 22:06:19,860 INFO L226 Difference]: Without dead ends: 465 [2021-06-05 22:06:19,861 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 216.6ms TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:06:19,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-06-05 22:06:19,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 325. [2021-06-05 22:06:19,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.95679012345679) internal successors, (958), 324 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:19,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 958 transitions. [2021-06-05 22:06:19,864 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 958 transitions. Word has length 22 [2021-06-05 22:06:19,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:19,864 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 958 transitions. [2021-06-05 22:06:19,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:19,865 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 958 transitions. [2021-06-05 22:06:19,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:06:19,865 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:19,865 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:20,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable879 [2021-06-05 22:06:20,066 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:20,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:20,066 INFO L82 PathProgramCache]: Analyzing trace with hash 495108076, now seen corresponding path program 60 times [2021-06-05 22:06:20,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:20,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050667496] [2021-06-05 22:06:20,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:20,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:20,128 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:20,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:20,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050667496] [2021-06-05 22:06:20,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050667496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:20,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014445039] [2021-06-05 22:06:20,128 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:20,190 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:06:20,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:20,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:06:20,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:20,320 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:20,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014445039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:20,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:20,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:06:20,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487773576] [2021-06-05 22:06:20,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:06:20,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:20,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:06:20,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:06:20,321 INFO L87 Difference]: Start difference. First operand 325 states and 958 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:20,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:20,458 INFO L93 Difference]: Finished difference Result 364 states and 1056 transitions. [2021-06-05 22:06:20,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:06:20,458 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:06:20,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:20,459 INFO L225 Difference]: With dead ends: 364 [2021-06-05 22:06:20,459 INFO L226 Difference]: Without dead ends: 344 [2021-06-05 22:06:20,459 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 176.0ms TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:06:20,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-06-05 22:06:20,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 322. [2021-06-05 22:06:20,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.9470404984423677) internal successors, (946), 321 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:20,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 946 transitions. [2021-06-05 22:06:20,463 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 946 transitions. Word has length 22 [2021-06-05 22:06:20,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:20,464 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 946 transitions. [2021-06-05 22:06:20,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:20,464 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 946 transitions. [2021-06-05 22:06:20,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:06:20,464 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:20,464 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:20,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable885,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:20,669 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:20,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:20,669 INFO L82 PathProgramCache]: Analyzing trace with hash 656029498, now seen corresponding path program 61 times [2021-06-05 22:06:20,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:20,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414849992] [2021-06-05 22:06:20,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:20,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:20,737 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:20,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:20,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414849992] [2021-06-05 22:06:20,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414849992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:20,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751103911] [2021-06-05 22:06:20,737 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:20,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:20,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:06:20,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:20,901 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:20,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751103911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:20,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:20,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:06:20,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839808348] [2021-06-05 22:06:20,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:06:20,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:20,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:06:20,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:06:20,902 INFO L87 Difference]: Start difference. First operand 322 states and 946 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:21,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:21,116 INFO L93 Difference]: Finished difference Result 488 states and 1415 transitions. [2021-06-05 22:06:21,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:06:21,116 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:06:21,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:21,117 INFO L225 Difference]: With dead ends: 488 [2021-06-05 22:06:21,117 INFO L226 Difference]: Without dead ends: 488 [2021-06-05 22:06:21,117 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 216.2ms TimeCoverageRelationStatistics Valid=157, Invalid=395, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:06:21,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-06-05 22:06:21,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 334. [2021-06-05 22:06:21,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.984984984984985) internal successors, (994), 333 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:21,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 994 transitions. [2021-06-05 22:06:21,121 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 994 transitions. Word has length 22 [2021-06-05 22:06:21,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:21,121 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 994 transitions. [2021-06-05 22:06:21,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:21,121 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 994 transitions. [2021-06-05 22:06:21,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:06:21,121 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:21,121 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:21,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable888 [2021-06-05 22:06:21,322 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:21,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:21,322 INFO L82 PathProgramCache]: Analyzing trace with hash -2144334834, now seen corresponding path program 62 times [2021-06-05 22:06:21,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:21,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445381920] [2021-06-05 22:06:21,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:21,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:21,383 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:21,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:21,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445381920] [2021-06-05 22:06:21,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445381920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:21,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002065550] [2021-06-05 22:06:21,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:21,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:06:21,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:21,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:06:21,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:21,542 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:21,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002065550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:21,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:21,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:06:21,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791285449] [2021-06-05 22:06:21,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:06:21,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:21,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:06:21,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:06:21,543 INFO L87 Difference]: Start difference. First operand 334 states and 994 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:21,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:21,710 INFO L93 Difference]: Finished difference Result 473 states and 1368 transitions. [2021-06-05 22:06:21,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:06:21,710 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:06:21,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:21,711 INFO L225 Difference]: With dead ends: 473 [2021-06-05 22:06:21,711 INFO L226 Difference]: Without dead ends: 463 [2021-06-05 22:06:21,711 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 161.5ms TimeCoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:06:21,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-06-05 22:06:21,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 341. [2021-06-05 22:06:21,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.9647058823529413) internal successors, (1008), 340 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:21,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1008 transitions. [2021-06-05 22:06:21,715 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1008 transitions. Word has length 22 [2021-06-05 22:06:21,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:21,715 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1008 transitions. [2021-06-05 22:06:21,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:21,715 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1008 transitions. [2021-06-05 22:06:21,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:06:21,715 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:21,715 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:21,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable894,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:21,916 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:21,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:21,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1831520142, now seen corresponding path program 63 times [2021-06-05 22:06:21,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:21,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952493887] [2021-06-05 22:06:21,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:21,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:21,983 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:21,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:21,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952493887] [2021-06-05 22:06:21,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952493887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:21,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384517995] [2021-06-05 22:06:21,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:22,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:06:22,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:22,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:06:22,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:22,138 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:22,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384517995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:22,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:22,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:06:22,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121650700] [2021-06-05 22:06:22,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:06:22,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:22,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:06:22,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:06:22,139 INFO L87 Difference]: Start difference. First operand 341 states and 1008 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:22,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:22,318 INFO L93 Difference]: Finished difference Result 400 states and 1179 transitions. [2021-06-05 22:06:22,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:06:22,318 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:06:22,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:22,319 INFO L225 Difference]: With dead ends: 400 [2021-06-05 22:06:22,319 INFO L226 Difference]: Without dead ends: 400 [2021-06-05 22:06:22,319 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 171.8ms TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:06:22,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-06-05 22:06:22,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 319. [2021-06-05 22:06:22,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.9465408805031448) internal successors, (937), 318 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:22,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 937 transitions. [2021-06-05 22:06:22,322 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 937 transitions. Word has length 22 [2021-06-05 22:06:22,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:22,322 INFO L482 AbstractCegarLoop]: Abstraction has 319 states and 937 transitions. [2021-06-05 22:06:22,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:22,322 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 937 transitions. [2021-06-05 22:06:22,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:06:22,323 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:22,323 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:22,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable900,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:22,524 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:22,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:22,524 INFO L82 PathProgramCache]: Analyzing trace with hash -640453132, now seen corresponding path program 64 times [2021-06-05 22:06:22,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:22,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923864154] [2021-06-05 22:06:22,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:22,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:22,590 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:22,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:22,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923864154] [2021-06-05 22:06:22,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923864154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:22,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345967203] [2021-06-05 22:06:22,591 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:22,639 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:06:22,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:22,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:06:22,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:22,751 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:22,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345967203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:22,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:22,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:06:22,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299397087] [2021-06-05 22:06:22,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:06:22,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:22,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:06:22,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:06:22,752 INFO L87 Difference]: Start difference. First operand 319 states and 937 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:22,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:22,960 INFO L93 Difference]: Finished difference Result 563 states and 1637 transitions. [2021-06-05 22:06:22,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:06:22,960 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:06:22,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:22,961 INFO L225 Difference]: With dead ends: 563 [2021-06-05 22:06:22,961 INFO L226 Difference]: Without dead ends: 563 [2021-06-05 22:06:22,964 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 205.5ms TimeCoverageRelationStatistics Valid=137, Invalid=369, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:06:22,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-06-05 22:06:22,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 337. [2021-06-05 22:06:22,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.9851190476190474) internal successors, (1003), 336 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:22,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1003 transitions. [2021-06-05 22:06:22,970 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1003 transitions. Word has length 22 [2021-06-05 22:06:22,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:22,970 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1003 transitions. [2021-06-05 22:06:22,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:22,971 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1003 transitions. [2021-06-05 22:06:22,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:06:22,971 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:22,972 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:23,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable903 [2021-06-05 22:06:23,194 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:23,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:23,194 INFO L82 PathProgramCache]: Analyzing trace with hash 854149832, now seen corresponding path program 65 times [2021-06-05 22:06:23,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:23,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169203830] [2021-06-05 22:06:23,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:23,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:23,255 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:23,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:23,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169203830] [2021-06-05 22:06:23,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169203830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:23,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881549059] [2021-06-05 22:06:23,255 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:23,307 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:06:23,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:23,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:06:23,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:23,434 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:23,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881549059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:23,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:23,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:06:23,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727996551] [2021-06-05 22:06:23,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:06:23,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:23,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:06:23,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:06:23,435 INFO L87 Difference]: Start difference. First operand 337 states and 1003 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:23,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:23,970 INFO L93 Difference]: Finished difference Result 595 states and 1719 transitions. [2021-06-05 22:06:23,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:06:23,970 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:06:23,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:23,971 INFO L225 Difference]: With dead ends: 595 [2021-06-05 22:06:23,971 INFO L226 Difference]: Without dead ends: 585 [2021-06-05 22:06:23,971 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 438.9ms TimeCoverageRelationStatistics Valid=254, Invalid=868, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:06:23,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-06-05 22:06:23,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 334. [2021-06-05 22:06:23,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.975975975975976) internal successors, (991), 333 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:23,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 991 transitions. [2021-06-05 22:06:23,976 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 991 transitions. Word has length 22 [2021-06-05 22:06:23,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:23,976 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 991 transitions. [2021-06-05 22:06:23,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:23,976 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 991 transitions. [2021-06-05 22:06:23,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:06:23,977 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:23,977 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:24,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable909 [2021-06-05 22:06:24,182 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:24,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:24,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1279097042, now seen corresponding path program 66 times [2021-06-05 22:06:24,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:24,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236929633] [2021-06-05 22:06:24,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:24,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:24,241 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:24,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:24,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236929633] [2021-06-05 22:06:24,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236929633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:24,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812914914] [2021-06-05 22:06:24,241 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:24,295 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:06:24,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:24,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:06:24,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:24,405 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:24,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812914914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:24,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:24,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:06:24,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208227133] [2021-06-05 22:06:24,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:06:24,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:24,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:06:24,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:06:24,406 INFO L87 Difference]: Start difference. First operand 334 states and 991 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:24,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:24,726 INFO L93 Difference]: Finished difference Result 572 states and 1665 transitions. [2021-06-05 22:06:24,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:06:24,726 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:06:24,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:24,727 INFO L225 Difference]: With dead ends: 572 [2021-06-05 22:06:24,727 INFO L226 Difference]: Without dead ends: 552 [2021-06-05 22:06:24,727 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 270.5ms TimeCoverageRelationStatistics Valid=166, Invalid=536, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:06:24,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-06-05 22:06:24,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 331. [2021-06-05 22:06:24,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.966666666666667) internal successors, (979), 330 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:24,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 979 transitions. [2021-06-05 22:06:24,732 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 979 transitions. Word has length 22 [2021-06-05 22:06:24,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:24,732 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 979 transitions. [2021-06-05 22:06:24,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:24,732 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 979 transitions. [2021-06-05 22:06:24,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:06:24,732 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:24,732 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:24,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable915,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:24,933 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:24,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:24,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1244273694, now seen corresponding path program 67 times [2021-06-05 22:06:24,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:24,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653215043] [2021-06-05 22:06:24,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:24,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:24,986 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:24,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:24,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653215043] [2021-06-05 22:06:24,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653215043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:24,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187815566] [2021-06-05 22:06:24,987 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:25,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:25,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:06:25,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:25,139 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:25,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187815566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:25,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:25,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:06:25,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216426198] [2021-06-05 22:06:25,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:06:25,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:25,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:06:25,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:06:25,140 INFO L87 Difference]: Start difference. First operand 331 states and 979 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:25,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:25,390 INFO L93 Difference]: Finished difference Result 515 states and 1495 transitions. [2021-06-05 22:06:25,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:06:25,391 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:06:25,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:25,391 INFO L225 Difference]: With dead ends: 515 [2021-06-05 22:06:25,391 INFO L226 Difference]: Without dead ends: 479 [2021-06-05 22:06:25,391 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 209.8ms TimeCoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:06:25,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-06-05 22:06:25,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 325. [2021-06-05 22:06:25,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.947530864197531) internal successors, (955), 324 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:25,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 955 transitions. [2021-06-05 22:06:25,395 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 955 transitions. Word has length 22 [2021-06-05 22:06:25,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:25,395 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 955 transitions. [2021-06-05 22:06:25,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:25,395 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 955 transitions. [2021-06-05 22:06:25,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:06:25,396 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:25,396 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:25,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable918,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:25,596 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:25,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:25,597 INFO L82 PathProgramCache]: Analyzing trace with hash 697114082, now seen corresponding path program 68 times [2021-06-05 22:06:25,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:25,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982755975] [2021-06-05 22:06:25,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:25,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:25,662 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:25,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:25,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982755975] [2021-06-05 22:06:25,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982755975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:25,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243619380] [2021-06-05 22:06:25,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:25,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:06:25,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:25,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:06:25,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:25,826 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:25,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243619380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:25,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:25,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:06:25,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258748450] [2021-06-05 22:06:25,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:06:25,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:25,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:06:25,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:06:25,827 INFO L87 Difference]: Start difference. First operand 325 states and 955 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:25,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:25,985 INFO L93 Difference]: Finished difference Result 461 states and 1343 transitions. [2021-06-05 22:06:25,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:06:25,986 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:06:25,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:25,986 INFO L225 Difference]: With dead ends: 461 [2021-06-05 22:06:25,986 INFO L226 Difference]: Without dead ends: 461 [2021-06-05 22:06:25,986 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 163.5ms TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:06:25,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-06-05 22:06:25,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 334. [2021-06-05 22:06:25,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.966966966966967) internal successors, (988), 333 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:25,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 988 transitions. [2021-06-05 22:06:25,991 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 988 transitions. Word has length 22 [2021-06-05 22:06:25,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:25,991 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 988 transitions. [2021-06-05 22:06:25,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:25,991 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 988 transitions. [2021-06-05 22:06:25,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:06:25,991 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:25,992 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:26,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable922,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:26,197 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:26,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:26,197 INFO L82 PathProgramCache]: Analyzing trace with hash -2103250250, now seen corresponding path program 69 times [2021-06-05 22:06:26,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:26,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913567440] [2021-06-05 22:06:26,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:26,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:26,258 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:26,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:26,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913567440] [2021-06-05 22:06:26,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913567440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:26,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289465889] [2021-06-05 22:06:26,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:26,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:06:26,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:26,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:06:26,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:26,474 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:26,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289465889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:26,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:26,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:06:26,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483797073] [2021-06-05 22:06:26,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:06:26,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:26,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:06:26,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:06:26,476 INFO L87 Difference]: Start difference. First operand 334 states and 988 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:26,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:26,790 INFO L93 Difference]: Finished difference Result 492 states and 1422 transitions. [2021-06-05 22:06:26,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:06:26,790 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:06:26,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:26,791 INFO L225 Difference]: With dead ends: 492 [2021-06-05 22:06:26,791 INFO L226 Difference]: Without dead ends: 482 [2021-06-05 22:06:26,791 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 279.9ms TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:06:26,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-06-05 22:06:26,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 331. [2021-06-05 22:06:26,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.9575757575757575) internal successors, (976), 330 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:26,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 976 transitions. [2021-06-05 22:06:26,797 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 976 transitions. Word has length 22 [2021-06-05 22:06:26,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:26,797 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 976 transitions. [2021-06-05 22:06:26,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:26,797 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 976 transitions. [2021-06-05 22:06:26,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:06:26,798 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:26,798 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:26,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable928 [2021-06-05 22:06:26,998 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:26,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:26,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1678303040, now seen corresponding path program 70 times [2021-06-05 22:06:26,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:26,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883213718] [2021-06-05 22:06:26,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:27,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:27,058 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:27,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:27,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883213718] [2021-06-05 22:06:27,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883213718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:27,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254645197] [2021-06-05 22:06:27,059 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:27,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:06:27,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:27,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:06:27,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:27,220 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:27,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254645197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:27,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:27,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:06:27,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947498825] [2021-06-05 22:06:27,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:06:27,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:27,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:06:27,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:06:27,221 INFO L87 Difference]: Start difference. First operand 331 states and 976 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:27,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:27,441 INFO L93 Difference]: Finished difference Result 446 states and 1303 transitions. [2021-06-05 22:06:27,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:06:27,441 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:06:27,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:27,442 INFO L225 Difference]: With dead ends: 446 [2021-06-05 22:06:27,442 INFO L226 Difference]: Without dead ends: 426 [2021-06-05 22:06:27,442 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 197.7ms TimeCoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:06:27,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-06-05 22:06:27,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 328. [2021-06-05 22:06:27,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.948012232415902) internal successors, (964), 327 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:27,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 964 transitions. [2021-06-05 22:06:27,445 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 964 transitions. Word has length 22 [2021-06-05 22:06:27,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:27,446 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 964 transitions. [2021-06-05 22:06:27,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:27,446 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 964 transitions. [2021-06-05 22:06:27,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:06:27,446 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:27,446 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:27,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable933,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:27,647 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:27,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:27,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1517381618, now seen corresponding path program 71 times [2021-06-05 22:06:27,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:27,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197641015] [2021-06-05 22:06:27,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:27,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:27,711 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:27,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:27,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197641015] [2021-06-05 22:06:27,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197641015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:27,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343127425] [2021-06-05 22:06:27,711 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:27,762 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:06:27,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:27,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:06:27,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:27,900 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:27,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343127425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:27,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:27,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:06:27,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752681436] [2021-06-05 22:06:27,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:06:27,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:27,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:06:27,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:06:27,901 INFO L87 Difference]: Start difference. First operand 328 states and 964 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:28,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:28,210 INFO L93 Difference]: Finished difference Result 502 states and 1458 transitions. [2021-06-05 22:06:28,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:06:28,211 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:06:28,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:28,211 INFO L225 Difference]: With dead ends: 502 [2021-06-05 22:06:28,211 INFO L226 Difference]: Without dead ends: 502 [2021-06-05 22:06:28,212 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 243.3ms TimeCoverageRelationStatistics Valid=151, Invalid=401, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:06:28,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-06-05 22:06:28,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 340. [2021-06-05 22:06:28,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.9852507374631267) internal successors, (1012), 339 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:28,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1012 transitions. [2021-06-05 22:06:28,217 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1012 transitions. Word has length 22 [2021-06-05 22:06:28,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:28,217 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1012 transitions. [2021-06-05 22:06:28,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:28,217 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1012 transitions. [2021-06-05 22:06:28,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:06:28,218 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:28,218 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:28,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable937,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:28,433 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:28,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:28,433 INFO L82 PathProgramCache]: Analyzing trace with hash -22778654, now seen corresponding path program 72 times [2021-06-05 22:06:28,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:28,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906922576] [2021-06-05 22:06:28,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:28,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:28,493 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:28,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:28,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906922576] [2021-06-05 22:06:28,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906922576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:28,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430536270] [2021-06-05 22:06:28,493 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:28,544 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:06:28,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:28,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:06:28,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:28,653 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:28,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430536270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:28,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:28,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:06:28,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38235954] [2021-06-05 22:06:28,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:06:28,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:28,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:06:28,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:06:28,654 INFO L87 Difference]: Start difference. First operand 340 states and 1012 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:28,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:28,835 INFO L93 Difference]: Finished difference Result 490 states and 1420 transitions. [2021-06-05 22:06:28,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:06:28,835 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:06:28,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:28,836 INFO L225 Difference]: With dead ends: 490 [2021-06-05 22:06:28,836 INFO L226 Difference]: Without dead ends: 480 [2021-06-05 22:06:28,836 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 163.0ms TimeCoverageRelationStatistics Valid=119, Invalid=301, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:06:28,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-06-05 22:06:28,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 347. [2021-06-05 22:06:28,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.9653179190751446) internal successors, (1026), 346 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:28,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1026 transitions. [2021-06-05 22:06:28,840 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1026 transitions. Word has length 22 [2021-06-05 22:06:28,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:28,840 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1026 transitions. [2021-06-05 22:06:28,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:28,840 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1026 transitions. [2021-06-05 22:06:28,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:06:28,840 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:28,840 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:29,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable943,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:29,041 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:29,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:29,041 INFO L82 PathProgramCache]: Analyzing trace with hash -341890974, now seen corresponding path program 73 times [2021-06-05 22:06:29,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:29,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269224529] [2021-06-05 22:06:29,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:29,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:29,119 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:29,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:29,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269224529] [2021-06-05 22:06:29,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269224529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:29,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972524861] [2021-06-05 22:06:29,120 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:29,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:29,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:06:29,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:29,295 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:29,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972524861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:29,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:29,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 22:06:29,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394292535] [2021-06-05 22:06:29,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:06:29,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:29,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:06:29,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:06:29,296 INFO L87 Difference]: Start difference. First operand 347 states and 1026 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:29,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:29,465 INFO L93 Difference]: Finished difference Result 414 states and 1222 transitions. [2021-06-05 22:06:29,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:06:29,466 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:06:29,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:29,466 INFO L225 Difference]: With dead ends: 414 [2021-06-05 22:06:29,466 INFO L226 Difference]: Without dead ends: 414 [2021-06-05 22:06:29,467 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 178.7ms TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:06:29,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-06-05 22:06:29,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 319. [2021-06-05 22:06:29,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.9465408805031448) internal successors, (937), 318 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:29,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 937 transitions. [2021-06-05 22:06:29,470 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 937 transitions. Word has length 22 [2021-06-05 22:06:29,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:29,470 INFO L482 AbstractCegarLoop]: Abstraction has 319 states and 937 transitions. [2021-06-05 22:06:29,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:29,470 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 937 transitions. [2021-06-05 22:06:29,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:06:29,471 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:29,471 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:29,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable949,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:29,673 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:29,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:29,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1055430800, now seen corresponding path program 74 times [2021-06-05 22:06:29,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:29,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351781234] [2021-06-05 22:06:29,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:29,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:29,742 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:29,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:29,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351781234] [2021-06-05 22:06:29,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351781234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:29,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21296916] [2021-06-05 22:06:29,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:29,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:06:29,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:29,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:06:29,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:29,890 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:29,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21296916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:29,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:29,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 22:06:29,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630188145] [2021-06-05 22:06:29,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:06:29,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:29,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:06:29,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:06:29,891 INFO L87 Difference]: Start difference. First operand 319 states and 937 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:30,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:30,212 INFO L93 Difference]: Finished difference Result 554 states and 1630 transitions. [2021-06-05 22:06:30,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:06:30,213 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:06:30,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:30,214 INFO L225 Difference]: With dead ends: 554 [2021-06-05 22:06:30,214 INFO L226 Difference]: Without dead ends: 554 [2021-06-05 22:06:30,214 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 250.1ms TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:06:30,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-06-05 22:06:30,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 326. [2021-06-05 22:06:30,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.9476923076923076) internal successors, (958), 325 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:30,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 958 transitions. [2021-06-05 22:06:30,218 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 958 transitions. Word has length 22 [2021-06-05 22:06:30,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:30,218 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 958 transitions. [2021-06-05 22:06:30,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:30,218 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 958 transitions. [2021-06-05 22:06:30,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:06:30,219 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:30,219 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:30,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable952,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:30,419 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:30,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:30,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1004090902, now seen corresponding path program 75 times [2021-06-05 22:06:30,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:30,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612867633] [2021-06-05 22:06:30,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:30,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:30,483 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:30,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:30,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612867633] [2021-06-05 22:06:30,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612867633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:30,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967621999] [2021-06-05 22:06:30,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:30,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:06:30,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:30,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:06:30,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:30,670 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:30,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967621999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:30,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:30,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:06:30,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814792187] [2021-06-05 22:06:30,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:06:30,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:30,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:06:30,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:06:30,671 INFO L87 Difference]: Start difference. First operand 326 states and 958 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:31,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:31,028 INFO L93 Difference]: Finished difference Result 651 states and 1893 transitions. [2021-06-05 22:06:31,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:06:31,029 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:06:31,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:31,030 INFO L225 Difference]: With dead ends: 651 [2021-06-05 22:06:31,030 INFO L226 Difference]: Without dead ends: 651 [2021-06-05 22:06:31,030 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 329.3ms TimeCoverageRelationStatistics Valid=160, Invalid=490, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:06:31,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2021-06-05 22:06:31,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 338. [2021-06-05 22:06:31,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.9851632047477743) internal successors, (1006), 337 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:31,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1006 transitions. [2021-06-05 22:06:31,035 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1006 transitions. Word has length 22 [2021-06-05 22:06:31,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:31,035 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1006 transitions. [2021-06-05 22:06:31,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:31,035 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1006 transitions. [2021-06-05 22:06:31,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:06:31,036 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:31,036 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:31,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable956,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:31,236 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:31,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:31,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1796273430, now seen corresponding path program 76 times [2021-06-05 22:06:31,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:31,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445093220] [2021-06-05 22:06:31,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:31,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:31,303 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:31,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:31,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445093220] [2021-06-05 22:06:31,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445093220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:31,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277043954] [2021-06-05 22:06:31,303 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:31,384 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:06:31,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:31,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:06:31,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:31,514 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:31,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277043954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:31,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:31,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:06:31,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866192657] [2021-06-05 22:06:31,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:06:31,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:31,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:06:31,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:06:31,515 INFO L87 Difference]: Start difference. First operand 338 states and 1006 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:31,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:31,863 INFO L93 Difference]: Finished difference Result 642 states and 1864 transitions. [2021-06-05 22:06:31,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:06:31,864 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:06:31,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:31,864 INFO L225 Difference]: With dead ends: 642 [2021-06-05 22:06:31,864 INFO L226 Difference]: Without dead ends: 632 [2021-06-05 22:06:31,864 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 267.9ms TimeCoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:06:31,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-06-05 22:06:31,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 345. [2021-06-05 22:06:31,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 2.9651162790697674) internal successors, (1020), 344 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:31,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1020 transitions. [2021-06-05 22:06:31,869 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1020 transitions. Word has length 22 [2021-06-05 22:06:31,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:31,869 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1020 transitions. [2021-06-05 22:06:31,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:31,869 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1020 transitions. [2021-06-05 22:06:31,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:06:31,869 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:31,869 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:32,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable961 [2021-06-05 22:06:32,070 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:32,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:32,070 INFO L82 PathProgramCache]: Analyzing trace with hash -2115385750, now seen corresponding path program 77 times [2021-06-05 22:06:32,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:32,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779938615] [2021-06-05 22:06:32,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:32,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:32,139 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:32,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:32,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779938615] [2021-06-05 22:06:32,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779938615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:32,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603531938] [2021-06-05 22:06:32,139 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:32,191 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:06:32,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:32,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:06:32,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:32,308 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:32,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603531938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:32,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:32,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:06:32,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259846030] [2021-06-05 22:06:32,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:06:32,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:32,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:06:32,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:06:32,308 INFO L87 Difference]: Start difference. First operand 345 states and 1020 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:32,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:32,589 INFO L93 Difference]: Finished difference Result 560 states and 1648 transitions. [2021-06-05 22:06:32,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:06:32,589 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:06:32,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:32,590 INFO L225 Difference]: With dead ends: 560 [2021-06-05 22:06:32,590 INFO L226 Difference]: Without dead ends: 560 [2021-06-05 22:06:32,590 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 248.7ms TimeCoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:06:32,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-06-05 22:06:32,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 323. [2021-06-05 22:06:32,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.9472049689440993) internal successors, (949), 322 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:32,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 949 transitions. [2021-06-05 22:06:32,594 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 949 transitions. Word has length 22 [2021-06-05 22:06:32,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:32,594 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 949 transitions. [2021-06-05 22:06:32,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:32,594 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 949 transitions. [2021-06-05 22:06:32,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:06:32,595 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:32,595 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:32,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable966,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:32,807 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:32,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:32,807 INFO L82 PathProgramCache]: Analyzing trace with hash 120966448, now seen corresponding path program 78 times [2021-06-05 22:06:32,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:32,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120424535] [2021-06-05 22:06:32,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:32,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:32,876 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:32,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:32,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120424535] [2021-06-05 22:06:32,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120424535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:32,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507688609] [2021-06-05 22:06:32,876 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:32,929 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:06:32,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:32,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:06:32,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:33,042 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:33,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507688609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:33,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:33,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:06:33,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37615895] [2021-06-05 22:06:33,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:06:33,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:33,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:06:33,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:06:33,043 INFO L87 Difference]: Start difference. First operand 323 states and 949 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:33,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:33,333 INFO L93 Difference]: Finished difference Result 503 states and 1467 transitions. [2021-06-05 22:06:33,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:06:33,333 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:06:33,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:33,334 INFO L225 Difference]: With dead ends: 503 [2021-06-05 22:06:33,334 INFO L226 Difference]: Without dead ends: 503 [2021-06-05 22:06:33,334 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 262.8ms TimeCoverageRelationStatistics Valid=157, Invalid=443, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:06:33,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-06-05 22:06:33,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 332. [2021-06-05 22:06:33,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.9667673716012084) internal successors, (982), 331 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:33,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 982 transitions. [2021-06-05 22:06:33,338 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 982 transitions. Word has length 22 [2021-06-05 22:06:33,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:33,338 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 982 transitions. [2021-06-05 22:06:33,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:33,338 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 982 transitions. [2021-06-05 22:06:33,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:06:33,339 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:33,339 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:33,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable970,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:33,539 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:33,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:33,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1615569412, now seen corresponding path program 79 times [2021-06-05 22:06:33,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:33,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194491059] [2021-06-05 22:06:33,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:33,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:33,610 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:33,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:33,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194491059] [2021-06-05 22:06:33,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194491059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:33,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286255936] [2021-06-05 22:06:33,611 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:33,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:33,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:06:33,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:33,821 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:33,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286255936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:33,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:33,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:06:33,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547568943] [2021-06-05 22:06:33,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:06:33,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:33,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:06:33,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:06:33,823 INFO L87 Difference]: Start difference. First operand 332 states and 982 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:34,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:34,143 INFO L93 Difference]: Finished difference Result 523 states and 1513 transitions. [2021-06-05 22:06:34,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:06:34,143 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:06:34,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:34,144 INFO L225 Difference]: With dead ends: 523 [2021-06-05 22:06:34,144 INFO L226 Difference]: Without dead ends: 513 [2021-06-05 22:06:34,144 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 254.3ms TimeCoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:06:34,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-06-05 22:06:34,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 329. [2021-06-05 22:06:34,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.957317073170732) internal successors, (970), 328 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:34,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 970 transitions. [2021-06-05 22:06:34,148 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 970 transitions. Word has length 22 [2021-06-05 22:06:34,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:34,148 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 970 transitions. [2021-06-05 22:06:34,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:34,148 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 970 transitions. [2021-06-05 22:06:34,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:06:34,149 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:34,149 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:34,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable975 [2021-06-05 22:06:34,349 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:34,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:34,349 INFO L82 PathProgramCache]: Analyzing trace with hash 2040516622, now seen corresponding path program 80 times [2021-06-05 22:06:34,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:34,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787270807] [2021-06-05 22:06:34,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:34,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:34,407 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:34,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:34,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787270807] [2021-06-05 22:06:34,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787270807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:34,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441743755] [2021-06-05 22:06:34,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:34,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:06:34,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:34,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:06:34,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:34,585 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:34,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441743755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:34,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:34,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:06:34,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118236115] [2021-06-05 22:06:34,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:06:34,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:34,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:06:34,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:06:34,586 INFO L87 Difference]: Start difference. First operand 329 states and 970 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:34,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:34,808 INFO L93 Difference]: Finished difference Result 412 states and 1199 transitions. [2021-06-05 22:06:34,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:06:34,809 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:06:34,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:34,809 INFO L225 Difference]: With dead ends: 412 [2021-06-05 22:06:34,809 INFO L226 Difference]: Without dead ends: 392 [2021-06-05 22:06:34,809 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 209.5ms TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:06:34,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-06-05 22:06:34,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 326. [2021-06-05 22:06:34,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.9476923076923076) internal successors, (958), 325 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:34,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 958 transitions. [2021-06-05 22:06:34,813 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 958 transitions. Word has length 22 [2021-06-05 22:06:34,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:34,813 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 958 transitions. [2021-06-05 22:06:34,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:34,813 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 958 transitions. [2021-06-05 22:06:34,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:06:34,814 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:34,814 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:35,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable980,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:35,014 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:35,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:35,015 INFO L82 PathProgramCache]: Analyzing trace with hash -2093529252, now seen corresponding path program 81 times [2021-06-05 22:06:35,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:35,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619019240] [2021-06-05 22:06:35,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:35,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:35,092 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:35,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:35,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619019240] [2021-06-05 22:06:35,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619019240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:35,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310799105] [2021-06-05 22:06:35,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:35,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:06:35,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:35,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:06:35,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:35,257 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:35,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310799105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:35,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:35,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:06:35,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749232068] [2021-06-05 22:06:35,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:06:35,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:35,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:06:35,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:06:35,258 INFO L87 Difference]: Start difference. First operand 326 states and 958 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:35,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:35,538 INFO L93 Difference]: Finished difference Result 551 states and 1603 transitions. [2021-06-05 22:06:35,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:06:35,539 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:06:35,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:35,539 INFO L225 Difference]: With dead ends: 551 [2021-06-05 22:06:35,539 INFO L226 Difference]: Without dead ends: 551 [2021-06-05 22:06:35,540 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 260.6ms TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:06:35,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-06-05 22:06:35,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 338. [2021-06-05 22:06:35,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.9851632047477743) internal successors, (1006), 337 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:35,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1006 transitions. [2021-06-05 22:06:35,544 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1006 transitions. Word has length 22 [2021-06-05 22:06:35,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:35,544 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1006 transitions. [2021-06-05 22:06:35,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:35,544 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1006 transitions. [2021-06-05 22:06:35,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:06:35,544 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:35,545 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:35,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable983 [2021-06-05 22:06:35,745 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:35,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:35,745 INFO L82 PathProgramCache]: Analyzing trace with hash -598926288, now seen corresponding path program 82 times [2021-06-05 22:06:35,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:35,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098316293] [2021-06-05 22:06:35,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:35,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:35,815 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:35,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:35,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098316293] [2021-06-05 22:06:35,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098316293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:35,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909588353] [2021-06-05 22:06:35,815 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:35,869 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:06:35,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:35,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:06:35,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:35,982 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:35,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909588353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:35,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:35,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:06:35,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743635941] [2021-06-05 22:06:35,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:06:35,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:35,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:06:35,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:06:35,983 INFO L87 Difference]: Start difference. First operand 338 states and 1006 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:36,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:36,211 INFO L93 Difference]: Finished difference Result 530 states and 1538 transitions. [2021-06-05 22:06:36,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:06:36,211 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:06:36,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:36,212 INFO L225 Difference]: With dead ends: 530 [2021-06-05 22:06:36,212 INFO L226 Difference]: Without dead ends: 520 [2021-06-05 22:06:36,213 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 207.0ms TimeCoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:06:36,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-06-05 22:06:36,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 345. [2021-06-05 22:06:36,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 2.9651162790697674) internal successors, (1020), 344 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:36,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1020 transitions. [2021-06-05 22:06:36,218 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1020 transitions. Word has length 22 [2021-06-05 22:06:36,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:36,218 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1020 transitions. [2021-06-05 22:06:36,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:36,218 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1020 transitions. [2021-06-05 22:06:36,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:06:36,218 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:36,218 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:36,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable988,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:36,419 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:36,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:36,431 INFO L82 PathProgramCache]: Analyzing trace with hash -918038608, now seen corresponding path program 83 times [2021-06-05 22:06:36,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:36,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430560550] [2021-06-05 22:06:36,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:36,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:36,543 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:36,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:36,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430560550] [2021-06-05 22:06:36,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430560550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:36,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278699207] [2021-06-05 22:06:36,543 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:36,598 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:06:36,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:36,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:06:36,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:36,709 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:36,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278699207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:36,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:36,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:06:36,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91350848] [2021-06-05 22:06:36,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:06:36,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:36,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:06:36,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:06:36,710 INFO L87 Difference]: Start difference. First operand 345 states and 1020 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:36,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:36,955 INFO L93 Difference]: Finished difference Result 451 states and 1331 transitions. [2021-06-05 22:06:36,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:06:36,955 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:06:36,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:36,956 INFO L225 Difference]: With dead ends: 451 [2021-06-05 22:06:36,956 INFO L226 Difference]: Without dead ends: 451 [2021-06-05 22:06:36,956 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 238.4ms TimeCoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:06:36,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-06-05 22:06:36,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 320. [2021-06-05 22:06:36,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.946708463949843) internal successors, (940), 319 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:36,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 940 transitions. [2021-06-05 22:06:36,960 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 940 transitions. Word has length 22 [2021-06-05 22:06:36,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:36,960 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 940 transitions. [2021-06-05 22:06:36,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:36,960 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 940 transitions. [2021-06-05 22:06:36,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:06:36,961 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:36,961 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:37,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable993 [2021-06-05 22:06:37,165 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:37,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:37,165 INFO L82 PathProgramCache]: Analyzing trace with hash -132951768, now seen corresponding path program 84 times [2021-06-05 22:06:37,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:37,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494472939] [2021-06-05 22:06:37,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:37,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:37,240 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:37,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:37,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494472939] [2021-06-05 22:06:37,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494472939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:37,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871103909] [2021-06-05 22:06:37,241 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:37,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:06:37,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:37,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:06:37,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:37,434 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:37,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871103909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:37,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:37,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 22:06:37,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274125454] [2021-06-05 22:06:37,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:06:37,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:37,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:06:37,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:06:37,435 INFO L87 Difference]: Start difference. First operand 320 states and 940 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:37,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:37,793 INFO L93 Difference]: Finished difference Result 736 states and 2158 transitions. [2021-06-05 22:06:37,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:06:37,793 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:06:37,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:37,794 INFO L225 Difference]: With dead ends: 736 [2021-06-05 22:06:37,794 INFO L226 Difference]: Without dead ends: 736 [2021-06-05 22:06:37,794 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 333.5ms TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:06:37,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2021-06-05 22:06:37,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 328. [2021-06-05 22:06:37,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.9602446483180427) internal successors, (968), 327 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:37,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 968 transitions. [2021-06-05 22:06:37,799 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 968 transitions. Word has length 22 [2021-06-05 22:06:37,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:37,800 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 968 transitions. [2021-06-05 22:06:37,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:37,800 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 968 transitions. [2021-06-05 22:06:37,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:06:37,801 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:37,801 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:38,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable997,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:38,017 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:38,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:38,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1926569934, now seen corresponding path program 85 times [2021-06-05 22:06:38,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:38,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204574619] [2021-06-05 22:06:38,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:38,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:38,086 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:38,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:38,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204574619] [2021-06-05 22:06:38,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204574619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:38,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941088645] [2021-06-05 22:06:38,087 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:38,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:38,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:06:38,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:38,288 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:38,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941088645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:38,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:38,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:06:38,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881823409] [2021-06-05 22:06:38,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:06:38,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:38,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:06:38,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:06:38,289 INFO L87 Difference]: Start difference. First operand 328 states and 968 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:38,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:38,815 INFO L93 Difference]: Finished difference Result 755 states and 2196 transitions. [2021-06-05 22:06:38,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:06:38,815 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:06:38,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:38,816 INFO L225 Difference]: With dead ends: 755 [2021-06-05 22:06:38,816 INFO L226 Difference]: Without dead ends: 755 [2021-06-05 22:06:38,816 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 456.9ms TimeCoverageRelationStatistics Valid=185, Invalid=517, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:06:38,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2021-06-05 22:06:38,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 340. [2021-06-05 22:06:38,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.9970501474926254) internal successors, (1016), 339 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:38,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1016 transitions. [2021-06-05 22:06:38,823 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1016 transitions. Word has length 22 [2021-06-05 22:06:38,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:38,823 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1016 transitions. [2021-06-05 22:06:38,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:38,823 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1016 transitions. [2021-06-05 22:06:38,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:06:38,824 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:38,824 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:39,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1002 [2021-06-05 22:06:39,033 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:39,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:39,033 INFO L82 PathProgramCache]: Analyzing trace with hash -873794398, now seen corresponding path program 86 times [2021-06-05 22:06:39,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:39,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484946611] [2021-06-05 22:06:39,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:39,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:39,106 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:39,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:39,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484946611] [2021-06-05 22:06:39,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484946611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:39,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627160599] [2021-06-05 22:06:39,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:39,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:06:39,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:39,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:06:39,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:39,285 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:39,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627160599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:39,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:39,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:06:39,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963634744] [2021-06-05 22:06:39,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:06:39,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:39,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:06:39,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:06:39,286 INFO L87 Difference]: Start difference. First operand 340 states and 1016 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:39,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:39,684 INFO L93 Difference]: Finished difference Result 758 states and 2203 transitions. [2021-06-05 22:06:39,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:06:39,684 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:06:39,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:39,685 INFO L225 Difference]: With dead ends: 758 [2021-06-05 22:06:39,685 INFO L226 Difference]: Without dead ends: 748 [2021-06-05 22:06:39,685 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 310.2ms TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:06:39,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-06-05 22:06:39,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 347. [2021-06-05 22:06:39,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.976878612716763) internal successors, (1030), 346 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:39,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1030 transitions. [2021-06-05 22:06:39,690 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1030 transitions. Word has length 22 [2021-06-05 22:06:39,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:39,691 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1030 transitions. [2021-06-05 22:06:39,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:39,691 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1030 transitions. [2021-06-05 22:06:39,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:06:39,691 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:39,691 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:39,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1010,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:39,910 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:39,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:39,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1192906718, now seen corresponding path program 87 times [2021-06-05 22:06:39,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:39,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460290386] [2021-06-05 22:06:39,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:39,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:39,979 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:39,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:39,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460290386] [2021-06-05 22:06:39,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460290386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:39,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920126460] [2021-06-05 22:06:39,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:40,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:06:40,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:40,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:06:40,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:40,174 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:40,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920126460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:40,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:40,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:06:40,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166332673] [2021-06-05 22:06:40,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:06:40,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:40,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:06:40,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:06:40,175 INFO L87 Difference]: Start difference. First operand 347 states and 1030 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:40,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:40,562 INFO L93 Difference]: Finished difference Result 686 states and 2019 transitions. [2021-06-05 22:06:40,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:06:40,563 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:06:40,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:40,563 INFO L225 Difference]: With dead ends: 686 [2021-06-05 22:06:40,564 INFO L226 Difference]: Without dead ends: 686 [2021-06-05 22:06:40,564 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 347.1ms TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:06:40,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2021-06-05 22:06:40,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 341. [2021-06-05 22:06:40,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.976470588235294) internal successors, (1012), 340 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:40,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1012 transitions. [2021-06-05 22:06:40,568 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1012 transitions. Word has length 22 [2021-06-05 22:06:40,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:40,568 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1012 transitions. [2021-06-05 22:06:40,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:40,568 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1012 transitions. [2021-06-05 22:06:40,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:06:40,569 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:40,569 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:40,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1019,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:40,769 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:40,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:40,769 INFO L82 PathProgramCache]: Analyzing trace with hash -241741712, now seen corresponding path program 88 times [2021-06-05 22:06:40,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:40,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456453483] [2021-06-05 22:06:40,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:40,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:40,834 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:40,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:40,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456453483] [2021-06-05 22:06:40,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456453483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:40,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587568673] [2021-06-05 22:06:40,834 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:40,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:06:40,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:40,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:06:40,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:41,021 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:41,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587568673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:41,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:41,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 22:06:41,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950004525] [2021-06-05 22:06:41,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:06:41,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:41,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:06:41,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:06:41,022 INFO L87 Difference]: Start difference. First operand 341 states and 1012 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:41,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:41,411 INFO L93 Difference]: Finished difference Result 621 states and 1823 transitions. [2021-06-05 22:06:41,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:06:41,412 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:06:41,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:41,412 INFO L225 Difference]: With dead ends: 621 [2021-06-05 22:06:41,412 INFO L226 Difference]: Without dead ends: 621 [2021-06-05 22:06:41,413 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 325.1ms TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:06:41,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-06-05 22:06:41,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 324. [2021-06-05 22:06:41,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.9473684210526314) internal successors, (952), 323 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:41,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 952 transitions. [2021-06-05 22:06:41,420 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 952 transitions. Word has length 22 [2021-06-05 22:06:41,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:41,421 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 952 transitions. [2021-06-05 22:06:41,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:41,421 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 952 transitions. [2021-06-05 22:06:41,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:06:41,422 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:41,422 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:41,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1026,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:41,645 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:41,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:41,646 INFO L82 PathProgramCache]: Analyzing trace with hash 968794932, now seen corresponding path program 89 times [2021-06-05 22:06:41,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:41,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757525396] [2021-06-05 22:06:41,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:41,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:41,727 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:41,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:41,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757525396] [2021-06-05 22:06:41,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757525396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:41,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284010168] [2021-06-05 22:06:41,728 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:41,798 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:06:41,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:41,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:06:41,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:41,915 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:41,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284010168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:41,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:41,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 22:06:41,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319019102] [2021-06-05 22:06:41,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:06:41,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:41,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:06:41,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:06:41,916 INFO L87 Difference]: Start difference. First operand 324 states and 952 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:42,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:42,265 INFO L93 Difference]: Finished difference Result 633 states and 1841 transitions. [2021-06-05 22:06:42,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:06:42,265 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:06:42,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:42,266 INFO L225 Difference]: With dead ends: 633 [2021-06-05 22:06:42,266 INFO L226 Difference]: Without dead ends: 633 [2021-06-05 22:06:42,266 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 304.9ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:06:42,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-06-05 22:06:42,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 336. [2021-06-05 22:06:42,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.985074626865672) internal successors, (1000), 335 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:42,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1000 transitions. [2021-06-05 22:06:42,270 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1000 transitions. Word has length 22 [2021-06-05 22:06:42,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:42,270 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1000 transitions. [2021-06-05 22:06:42,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:42,270 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1000 transitions. [2021-06-05 22:06:42,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:06:42,270 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:42,270 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:42,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1031,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:42,471 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:42,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:42,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1983309410, now seen corresponding path program 90 times [2021-06-05 22:06:42,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:42,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957462246] [2021-06-05 22:06:42,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:42,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:42,539 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:42,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:42,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957462246] [2021-06-05 22:06:42,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957462246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:42,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975453878] [2021-06-05 22:06:42,540 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:42,608 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:06:42,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:42,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:06:42,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:42,738 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:42,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975453878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:42,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:42,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 22:06:42,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76214449] [2021-06-05 22:06:42,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:06:42,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:42,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:06:42,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:06:42,739 INFO L87 Difference]: Start difference. First operand 336 states and 1000 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:43,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:43,111 INFO L93 Difference]: Finished difference Result 603 states and 1751 transitions. [2021-06-05 22:06:43,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:06:43,111 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:06:43,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:43,112 INFO L225 Difference]: With dead ends: 603 [2021-06-05 22:06:43,112 INFO L226 Difference]: Without dead ends: 594 [2021-06-05 22:06:43,112 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 308.6ms TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:06:43,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-06-05 22:06:43,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 342. [2021-06-05 22:06:43,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.967741935483871) internal successors, (1012), 341 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:43,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1012 transitions. [2021-06-05 22:06:43,116 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1012 transitions. Word has length 22 [2021-06-05 22:06:43,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:43,116 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1012 transitions. [2021-06-05 22:06:43,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:43,116 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1012 transitions. [2021-06-05 22:06:43,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:06:43,117 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:43,117 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:43,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1037 [2021-06-05 22:06:43,317 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:43,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:43,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1137989188, now seen corresponding path program 91 times [2021-06-05 22:06:43,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:43,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591396143] [2021-06-05 22:06:43,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:43,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:43,397 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:43,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:43,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591396143] [2021-06-05 22:06:43,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591396143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:43,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611013879] [2021-06-05 22:06:43,397 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:43,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:43,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:06:43,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:43,578 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:43,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611013879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:43,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:43,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 22:06:43,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822186948] [2021-06-05 22:06:43,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:06:43,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:43,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:06:43,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:06:43,579 INFO L87 Difference]: Start difference. First operand 342 states and 1012 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:43,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:43,907 INFO L93 Difference]: Finished difference Result 546 states and 1607 transitions. [2021-06-05 22:06:43,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:06:43,907 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:06:43,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:43,908 INFO L225 Difference]: With dead ends: 546 [2021-06-05 22:06:43,908 INFO L226 Difference]: Without dead ends: 546 [2021-06-05 22:06:43,908 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 312.6ms TimeCoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:06:43,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-06-05 22:06:43,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 324. [2021-06-05 22:06:43,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.9473684210526314) internal successors, (952), 323 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:43,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 952 transitions. [2021-06-05 22:06:43,912 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 952 transitions. Word has length 22 [2021-06-05 22:06:43,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:43,912 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 952 transitions. [2021-06-05 22:06:43,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:43,912 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 952 transitions. [2021-06-05 22:06:43,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:06:43,912 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:43,912 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:44,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1042,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:44,113 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:44,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:44,113 INFO L82 PathProgramCache]: Analyzing trace with hash -2141572440, now seen corresponding path program 92 times [2021-06-05 22:06:44,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:44,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120054286] [2021-06-05 22:06:44,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:44,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:44,195 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:44,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:44,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120054286] [2021-06-05 22:06:44,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120054286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:44,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112342433] [2021-06-05 22:06:44,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:44,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:06:44,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:44,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:06:44,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:44,430 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:44,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112342433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:44,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:44,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:06:44,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131755137] [2021-06-05 22:06:44,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:06:44,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:44,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:06:44,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:06:44,431 INFO L87 Difference]: Start difference. First operand 324 states and 952 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:44,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:44,890 INFO L93 Difference]: Finished difference Result 733 states and 2130 transitions. [2021-06-05 22:06:44,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:06:44,891 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:06:44,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:44,892 INFO L225 Difference]: With dead ends: 733 [2021-06-05 22:06:44,892 INFO L226 Difference]: Without dead ends: 733 [2021-06-05 22:06:44,892 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 469.2ms TimeCoverageRelationStatistics Valid=192, Invalid=510, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:06:44,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2021-06-05 22:06:44,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 338. [2021-06-05 22:06:44,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 3.0118694362017804) internal successors, (1015), 337 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:44,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1015 transitions. [2021-06-05 22:06:44,896 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1015 transitions. Word has length 22 [2021-06-05 22:06:44,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:44,896 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1015 transitions. [2021-06-05 22:06:44,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:44,896 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1015 transitions. [2021-06-05 22:06:44,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:06:44,897 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:44,897 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:45,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1048 [2021-06-05 22:06:45,097 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:45,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:45,098 INFO L82 PathProgramCache]: Analyzing trace with hash -646969476, now seen corresponding path program 93 times [2021-06-05 22:06:45,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:45,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57562330] [2021-06-05 22:06:45,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:45,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:45,173 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:45,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:45,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57562330] [2021-06-05 22:06:45,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57562330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:45,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610202283] [2021-06-05 22:06:45,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:45,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:06:45,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:45,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:06:45,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:45,400 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:45,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610202283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:45,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:45,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:06:45,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73296265] [2021-06-05 22:06:45,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:06:45,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:45,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:06:45,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:06:45,400 INFO L87 Difference]: Start difference. First operand 338 states and 1015 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:45,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:45,808 INFO L93 Difference]: Finished difference Result 767 states and 2208 transitions. [2021-06-05 22:06:45,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:06:45,809 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:06:45,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:45,810 INFO L225 Difference]: With dead ends: 767 [2021-06-05 22:06:45,810 INFO L226 Difference]: Without dead ends: 757 [2021-06-05 22:06:45,810 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 413.8ms TimeCoverageRelationStatistics Valid=171, Invalid=479, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:06:45,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2021-06-05 22:06:45,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 345. [2021-06-05 22:06:45,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 2.991279069767442) internal successors, (1029), 344 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:45,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1029 transitions. [2021-06-05 22:06:45,814 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1029 transitions. Word has length 22 [2021-06-05 22:06:45,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:45,815 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1029 transitions. [2021-06-05 22:06:45,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:45,815 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1029 transitions. [2021-06-05 22:06:45,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:06:45,815 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:45,815 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:46,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1062,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:46,016 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:46,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:46,016 INFO L82 PathProgramCache]: Analyzing trace with hash 803562480, now seen corresponding path program 94 times [2021-06-05 22:06:46,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:46,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033506833] [2021-06-05 22:06:46,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:46,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:46,088 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:46,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:46,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033506833] [2021-06-05 22:06:46,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033506833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:46,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954005294] [2021-06-05 22:06:46,088 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:46,146 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:06:46,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:46,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:06:46,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:46,280 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:46,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954005294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:46,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:46,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:06:46,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902751479] [2021-06-05 22:06:46,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:06:46,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:46,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:06:46,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:06:46,281 INFO L87 Difference]: Start difference. First operand 345 states and 1029 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:46,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:46,633 INFO L93 Difference]: Finished difference Result 745 states and 2169 transitions. [2021-06-05 22:06:46,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:06:46,633 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:06:46,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:46,634 INFO L225 Difference]: With dead ends: 745 [2021-06-05 22:06:46,634 INFO L226 Difference]: Without dead ends: 745 [2021-06-05 22:06:46,634 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 307.7ms TimeCoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:06:46,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2021-06-05 22:06:46,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 351. [2021-06-05 22:06:46,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 3.0171428571428573) internal successors, (1056), 350 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:46,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1056 transitions. [2021-06-05 22:06:46,639 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1056 transitions. Word has length 22 [2021-06-05 22:06:46,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:46,639 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1056 transitions. [2021-06-05 22:06:46,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:46,639 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1056 transitions. [2021-06-05 22:06:46,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:06:46,639 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:46,639 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:46,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1076,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:46,840 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:46,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:46,840 INFO L82 PathProgramCache]: Analyzing trace with hash -708456964, now seen corresponding path program 95 times [2021-06-05 22:06:46,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:46,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205663856] [2021-06-05 22:06:46,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:46,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:46,913 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:46,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:46,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205663856] [2021-06-05 22:06:46,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205663856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:46,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210665354] [2021-06-05 22:06:46,913 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:47,006 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:06:47,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:47,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:06:47,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:47,168 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:47,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210665354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:47,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:47,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:06:47,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149230610] [2021-06-05 22:06:47,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:06:47,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:47,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:06:47,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:06:47,170 INFO L87 Difference]: Start difference. First operand 351 states and 1056 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:47,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:47,640 INFO L93 Difference]: Finished difference Result 754 states and 2175 transitions. [2021-06-05 22:06:47,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:06:47,640 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:06:47,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:47,641 INFO L225 Difference]: With dead ends: 754 [2021-06-05 22:06:47,641 INFO L226 Difference]: Without dead ends: 745 [2021-06-05 22:06:47,641 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 422.2ms TimeCoverageRelationStatistics Valid=175, Invalid=475, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:06:47,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2021-06-05 22:06:47,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 357. [2021-06-05 22:06:47,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 3.0) internal successors, (1068), 356 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:47,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1068 transitions. [2021-06-05 22:06:47,647 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1068 transitions. Word has length 22 [2021-06-05 22:06:47,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:47,647 INFO L482 AbstractCegarLoop]: Abstraction has 357 states and 1068 transitions. [2021-06-05 22:06:47,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:47,647 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1068 transitions. [2021-06-05 22:06:47,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:06:47,648 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:47,648 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:47,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1089 [2021-06-05 22:06:47,865 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:47,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:47,865 INFO L82 PathProgramCache]: Analyzing trace with hash -931017330, now seen corresponding path program 96 times [2021-06-05 22:06:47,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:47,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950908973] [2021-06-05 22:06:47,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:47,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:47,935 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:47,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:47,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950908973] [2021-06-05 22:06:47,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950908973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:47,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995049312] [2021-06-05 22:06:47,936 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:48,006 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:06:48,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:48,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:06:48,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:48,146 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:48,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995049312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:48,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:48,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 22:06:48,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306790060] [2021-06-05 22:06:48,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:06:48,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:48,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:06:48,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:06:48,147 INFO L87 Difference]: Start difference. First operand 357 states and 1068 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:48,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:48,610 INFO L93 Difference]: Finished difference Result 797 states and 2257 transitions. [2021-06-05 22:06:48,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:06:48,610 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:06:48,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:48,611 INFO L225 Difference]: With dead ends: 797 [2021-06-05 22:06:48,611 INFO L226 Difference]: Without dead ends: 787 [2021-06-05 22:06:48,612 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 389.9ms TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:06:48,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2021-06-05 22:06:48,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 369. [2021-06-05 22:06:48,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 3.005434782608696) internal successors, (1106), 368 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:48,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 1106 transitions. [2021-06-05 22:06:48,616 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 1106 transitions. Word has length 22 [2021-06-05 22:06:48,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:48,616 INFO L482 AbstractCegarLoop]: Abstraction has 369 states and 1106 transitions. [2021-06-05 22:06:48,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:48,617 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 1106 transitions. [2021-06-05 22:06:48,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:06:48,617 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:48,617 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:48,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1103 [2021-06-05 22:06:48,818 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:48,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:48,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1113107642, now seen corresponding path program 97 times [2021-06-05 22:06:48,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:48,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588106280] [2021-06-05 22:06:48,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:48,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:48,893 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:48,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:48,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588106280] [2021-06-05 22:06:48,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588106280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:48,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279788158] [2021-06-05 22:06:48,894 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:48,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:48,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:06:48,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:49,103 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:49,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279788158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:49,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:49,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 22:06:49,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933280478] [2021-06-05 22:06:49,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:06:49,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:49,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:06:49,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:06:49,108 INFO L87 Difference]: Start difference. First operand 369 states and 1106 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:49,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:49,467 INFO L93 Difference]: Finished difference Result 711 states and 2049 transitions. [2021-06-05 22:06:49,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:06:49,467 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:06:49,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:49,468 INFO L225 Difference]: With dead ends: 711 [2021-06-05 22:06:49,468 INFO L226 Difference]: Without dead ends: 699 [2021-06-05 22:06:49,468 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 321.3ms TimeCoverageRelationStatistics Valid=130, Invalid=376, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:06:49,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2021-06-05 22:06:49,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 365. [2021-06-05 22:06:49,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 3.0054945054945055) internal successors, (1094), 364 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:49,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 1094 transitions. [2021-06-05 22:06:49,474 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 1094 transitions. Word has length 22 [2021-06-05 22:06:49,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:49,474 INFO L482 AbstractCegarLoop]: Abstraction has 365 states and 1094 transitions. [2021-06-05 22:06:49,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:49,474 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 1094 transitions. [2021-06-05 22:06:49,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:06:49,474 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:49,474 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:49,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1114,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:49,675 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:49,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:49,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1304772384, now seen corresponding path program 98 times [2021-06-05 22:06:49,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:49,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86638632] [2021-06-05 22:06:49,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:49,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:49,756 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:49,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:49,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86638632] [2021-06-05 22:06:49,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86638632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:49,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594625841] [2021-06-05 22:06:49,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:49,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:06:49,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:49,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:06:49,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:49,964 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:49,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594625841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:49,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:49,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:06:49,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224800046] [2021-06-05 22:06:49,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:06:49,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:49,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:06:49,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:06:49,965 INFO L87 Difference]: Start difference. First operand 365 states and 1094 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:50,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:50,395 INFO L93 Difference]: Finished difference Result 689 states and 2001 transitions. [2021-06-05 22:06:50,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:06:50,395 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:06:50,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:50,396 INFO L225 Difference]: With dead ends: 689 [2021-06-05 22:06:50,396 INFO L226 Difference]: Without dead ends: 689 [2021-06-05 22:06:50,396 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 410.6ms TimeCoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:06:50,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2021-06-05 22:06:50,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 370. [2021-06-05 22:06:50,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 3.0) internal successors, (1107), 369 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:50,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1107 transitions. [2021-06-05 22:06:50,401 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1107 transitions. Word has length 22 [2021-06-05 22:06:50,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:50,401 INFO L482 AbstractCegarLoop]: Abstraction has 370 states and 1107 transitions. [2021-06-05 22:06:50,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:50,401 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1107 transitions. [2021-06-05 22:06:50,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:06:50,401 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:50,401 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:50,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1123 [2021-06-05 22:06:50,602 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:50,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:50,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1495591948, now seen corresponding path program 99 times [2021-06-05 22:06:50,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:50,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471101280] [2021-06-05 22:06:50,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:50,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:50,670 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:50,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:50,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471101280] [2021-06-05 22:06:50,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471101280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:50,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889521502] [2021-06-05 22:06:50,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:50,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:06:50,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:50,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:06:50,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:50,882 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:50,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889521502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:50,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:50,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:06:50,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877168420] [2021-06-05 22:06:50,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:06:50,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:50,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:06:50,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:06:50,883 INFO L87 Difference]: Start difference. First operand 370 states and 1107 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:51,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:51,213 INFO L93 Difference]: Finished difference Result 680 states and 1981 transitions. [2021-06-05 22:06:51,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:06:51,214 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:06:51,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:51,215 INFO L225 Difference]: With dead ends: 680 [2021-06-05 22:06:51,215 INFO L226 Difference]: Without dead ends: 670 [2021-06-05 22:06:51,215 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 324.3ms TimeCoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:06:51,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2021-06-05 22:06:51,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 349. [2021-06-05 22:06:51,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.971264367816092) internal successors, (1034), 348 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:51,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1034 transitions. [2021-06-05 22:06:51,220 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1034 transitions. Word has length 22 [2021-06-05 22:06:51,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:51,220 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1034 transitions. [2021-06-05 22:06:51,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:51,220 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1034 transitions. [2021-06-05 22:06:51,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:06:51,221 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:51,221 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:51,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1131,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:51,421 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:51,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:51,421 INFO L82 PathProgramCache]: Analyzing trace with hash -2041925648, now seen corresponding path program 100 times [2021-06-05 22:06:51,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:51,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700565719] [2021-06-05 22:06:51,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:51,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:51,493 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:51,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:51,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700565719] [2021-06-05 22:06:51,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700565719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:51,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732228223] [2021-06-05 22:06:51,494 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:51,554 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:06:51,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:51,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:06:51,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:51,701 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:51,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732228223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:51,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:51,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:06:51,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442618594] [2021-06-05 22:06:51,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:06:51,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:51,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:06:51,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:06:51,702 INFO L87 Difference]: Start difference. First operand 349 states and 1034 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:52,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:52,048 INFO L93 Difference]: Finished difference Result 594 states and 1754 transitions. [2021-06-05 22:06:52,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:06:52,049 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:06:52,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:52,049 INFO L225 Difference]: With dead ends: 594 [2021-06-05 22:06:52,049 INFO L226 Difference]: Without dead ends: 594 [2021-06-05 22:06:52,050 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 308.5ms TimeCoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:06:52,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-06-05 22:06:52,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 346. [2021-06-05 22:06:52,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 2.971014492753623) internal successors, (1025), 345 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:52,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1025 transitions. [2021-06-05 22:06:52,054 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1025 transitions. Word has length 22 [2021-06-05 22:06:52,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:52,054 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 1025 transitions. [2021-06-05 22:06:52,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:52,054 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1025 transitions. [2021-06-05 22:06:52,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:06:52,054 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:52,054 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:52,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1141,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:52,256 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:52,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:52,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1317993700, now seen corresponding path program 101 times [2021-06-05 22:06:52,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:52,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798143321] [2021-06-05 22:06:52,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:52,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:52,330 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:52,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:52,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798143321] [2021-06-05 22:06:52,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798143321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:52,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548329213] [2021-06-05 22:06:52,330 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:52,390 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:06:52,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:52,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:06:52,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:52,527 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:52,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548329213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:52,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:52,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:06:52,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362572534] [2021-06-05 22:06:52,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:06:52,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:52,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:06:52,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:06:52,528 INFO L87 Difference]: Start difference. First operand 346 states and 1025 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:52,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:52,964 INFO L93 Difference]: Finished difference Result 655 states and 1884 transitions. [2021-06-05 22:06:52,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:06:52,964 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:06:52,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:52,965 INFO L225 Difference]: With dead ends: 655 [2021-06-05 22:06:52,965 INFO L226 Difference]: Without dead ends: 655 [2021-06-05 22:06:52,965 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 397.1ms TimeCoverageRelationStatistics Valid=172, Invalid=478, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:06:52,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-06-05 22:06:52,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 354. [2021-06-05 22:06:52,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.9830028328611897) internal successors, (1053), 353 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:52,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1053 transitions. [2021-06-05 22:06:52,969 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1053 transitions. Word has length 22 [2021-06-05 22:06:52,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:52,969 INFO L482 AbstractCegarLoop]: Abstraction has 354 states and 1053 transitions. [2021-06-05 22:06:52,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:52,969 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1053 transitions. [2021-06-05 22:06:52,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:06:52,970 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:52,970 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:53,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1148,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:53,170 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:53,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:53,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1464954152, now seen corresponding path program 102 times [2021-06-05 22:06:53,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:53,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430546603] [2021-06-05 22:06:53,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:53,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:53,238 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:53,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:53,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430546603] [2021-06-05 22:06:53,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430546603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:53,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763385300] [2021-06-05 22:06:53,239 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:53,298 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:06:53,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:53,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:06:53,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:53,445 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:53,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763385300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:53,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:53,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:06:53,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659879283] [2021-06-05 22:06:53,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:06:53,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:53,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:06:53,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:06:53,447 INFO L87 Difference]: Start difference. First operand 354 states and 1053 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:53,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:53,793 INFO L93 Difference]: Finished difference Result 622 states and 1795 transitions. [2021-06-05 22:06:53,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:06:53,793 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:06:53,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:53,794 INFO L225 Difference]: With dead ends: 622 [2021-06-05 22:06:53,794 INFO L226 Difference]: Without dead ends: 613 [2021-06-05 22:06:53,794 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 301.8ms TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:06:53,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-06-05 22:06:53,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 354. [2021-06-05 22:06:53,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.954674220963173) internal successors, (1043), 353 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:53,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1043 transitions. [2021-06-05 22:06:53,799 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1043 transitions. Word has length 22 [2021-06-05 22:06:53,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:53,799 INFO L482 AbstractCegarLoop]: Abstraction has 354 states and 1043 transitions. [2021-06-05 22:06:53,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:53,800 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1043 transitions. [2021-06-05 22:06:53,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:06:53,800 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:53,800 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:54,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1155 [2021-06-05 22:06:54,021 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:54,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:54,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1287030692, now seen corresponding path program 103 times [2021-06-05 22:06:54,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:54,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168446125] [2021-06-05 22:06:54,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:54,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:54,099 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:54,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:54,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168446125] [2021-06-05 22:06:54,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168446125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:54,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327801808] [2021-06-05 22:06:54,099 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:54,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:54,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:06:54,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:54,303 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:54,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327801808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:54,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:54,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:06:54,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556805300] [2021-06-05 22:06:54,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:06:54,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:54,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:06:54,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:06:54,304 INFO L87 Difference]: Start difference. First operand 354 states and 1043 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:54,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:54,609 INFO L93 Difference]: Finished difference Result 565 states and 1664 transitions. [2021-06-05 22:06:54,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:06:54,610 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:06:54,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:54,610 INFO L225 Difference]: With dead ends: 565 [2021-06-05 22:06:54,610 INFO L226 Difference]: Without dead ends: 565 [2021-06-05 22:06:54,610 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 307.2ms TimeCoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:06:54,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-06-05 22:06:54,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 324. [2021-06-05 22:06:54,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.9473684210526314) internal successors, (952), 323 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:54,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 952 transitions. [2021-06-05 22:06:54,614 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 952 transitions. Word has length 22 [2021-06-05 22:06:54,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:54,614 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 952 transitions. [2021-06-05 22:06:54,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:54,614 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 952 transitions. [2021-06-05 22:06:54,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:06:54,615 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:54,615 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:54,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1163,105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:54,817 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:54,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:54,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1437395562, now seen corresponding path program 104 times [2021-06-05 22:06:54,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:54,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65701231] [2021-06-05 22:06:54,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:54,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:54,889 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:54,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:54,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65701231] [2021-06-05 22:06:54,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65701231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:54,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000071869] [2021-06-05 22:06:54,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:54,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:06:54,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:54,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:06:54,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:55,093 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:55,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000071869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:55,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:55,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:06:55,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460090301] [2021-06-05 22:06:55,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:06:55,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:55,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:06:55,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:06:55,094 INFO L87 Difference]: Start difference. First operand 324 states and 952 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:55,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:55,357 INFO L93 Difference]: Finished difference Result 489 states and 1425 transitions. [2021-06-05 22:06:55,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:06:55,358 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:06:55,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:55,358 INFO L225 Difference]: With dead ends: 489 [2021-06-05 22:06:55,358 INFO L226 Difference]: Without dead ends: 489 [2021-06-05 22:06:55,358 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 267.6ms TimeCoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:06:55,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-06-05 22:06:55,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 334. [2021-06-05 22:06:55,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.978978978978979) internal successors, (992), 333 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:55,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 992 transitions. [2021-06-05 22:06:55,362 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 992 transitions. Word has length 22 [2021-06-05 22:06:55,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:55,362 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 992 transitions. [2021-06-05 22:06:55,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:55,362 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 992 transitions. [2021-06-05 22:06:55,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:06:55,363 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:55,363 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:55,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1170,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:55,563 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:55,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:55,563 INFO L82 PathProgramCache]: Analyzing trace with hash 57207402, now seen corresponding path program 105 times [2021-06-05 22:06:55,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:55,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152333306] [2021-06-05 22:06:55,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:55,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:55,640 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:55,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:55,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152333306] [2021-06-05 22:06:55,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152333306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:55,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244111099] [2021-06-05 22:06:55,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:55,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:06:55,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:55,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:06:55,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:55,880 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:55,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244111099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:55,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:55,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:06:55,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810248770] [2021-06-05 22:06:55,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:06:55,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:55,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:06:55,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:06:55,881 INFO L87 Difference]: Start difference. First operand 334 states and 992 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:56,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:56,235 INFO L93 Difference]: Finished difference Result 516 states and 1492 transitions. [2021-06-05 22:06:56,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:06:56,235 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:06:56,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:56,236 INFO L225 Difference]: With dead ends: 516 [2021-06-05 22:06:56,236 INFO L226 Difference]: Without dead ends: 506 [2021-06-05 22:06:56,236 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 337.7ms TimeCoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:06:56,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-06-05 22:06:56,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 331. [2021-06-05 22:06:56,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.9696969696969697) internal successors, (980), 330 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:56,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 980 transitions. [2021-06-05 22:06:56,239 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 980 transitions. Word has length 22 [2021-06-05 22:06:56,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:56,240 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 980 transitions. [2021-06-05 22:06:56,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:56,240 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 980 transitions. [2021-06-05 22:06:56,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:06:56,240 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:56,240 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:56,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1180,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:56,441 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:56,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:56,441 INFO L82 PathProgramCache]: Analyzing trace with hash 482154612, now seen corresponding path program 106 times [2021-06-05 22:06:56,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:56,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004369772] [2021-06-05 22:06:56,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:56,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:56,503 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:56,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:56,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004369772] [2021-06-05 22:06:56,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004369772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:56,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994868105] [2021-06-05 22:06:56,504 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:56,571 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:06:56,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:56,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:06:56,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:56,766 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:56,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994868105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:56,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:56,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:06:56,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514604373] [2021-06-05 22:06:56,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:06:56,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:56,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:06:56,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:06:56,767 INFO L87 Difference]: Start difference. First operand 331 states and 980 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:57,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:57,075 INFO L93 Difference]: Finished difference Result 477 states and 1390 transitions. [2021-06-05 22:06:57,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:06:57,076 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:06:57,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:57,076 INFO L225 Difference]: With dead ends: 477 [2021-06-05 22:06:57,076 INFO L226 Difference]: Without dead ends: 457 [2021-06-05 22:06:57,076 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 321.1ms TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:06:57,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-06-05 22:06:57,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 328. [2021-06-05 22:06:57,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.9602446483180427) internal successors, (968), 327 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:57,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 968 transitions. [2021-06-05 22:06:57,080 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 968 transitions. Word has length 22 [2021-06-05 22:06:57,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:57,080 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 968 transitions. [2021-06-05 22:06:57,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:57,080 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 968 transitions. [2021-06-05 22:06:57,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:06:57,080 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:57,080 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:57,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1193,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:57,281 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:57,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:57,281 INFO L82 PathProgramCache]: Analyzing trace with hash -332526258, now seen corresponding path program 107 times [2021-06-05 22:06:57,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:57,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56807246] [2021-06-05 22:06:57,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:57,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:57,360 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:57,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:57,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56807246] [2021-06-05 22:06:57,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56807246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:57,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075144642] [2021-06-05 22:06:57,360 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:57,438 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:06:57,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:57,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:06:57,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:57,571 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:57,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075144642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:57,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:57,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:06:57,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522037811] [2021-06-05 22:06:57,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:06:57,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:57,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:06:57,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:06:57,572 INFO L87 Difference]: Start difference. First operand 328 states and 968 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:57,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:57,906 INFO L93 Difference]: Finished difference Result 607 states and 1761 transitions. [2021-06-05 22:06:57,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:06:57,906 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:06:57,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:57,907 INFO L225 Difference]: With dead ends: 607 [2021-06-05 22:06:57,907 INFO L226 Difference]: Without dead ends: 607 [2021-06-05 22:06:57,907 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 307.9ms TimeCoverageRelationStatistics Valid=148, Invalid=404, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:06:57,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-06-05 22:06:57,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 338. [2021-06-05 22:06:57,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 3.0118694362017804) internal successors, (1015), 337 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:57,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1015 transitions. [2021-06-05 22:06:57,911 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1015 transitions. Word has length 22 [2021-06-05 22:06:57,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:57,911 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1015 transitions. [2021-06-05 22:06:57,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:57,911 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1015 transitions. [2021-06-05 22:06:57,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:06:57,912 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:57,912 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:58,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1201,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:58,112 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:58,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:58,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1162076706, now seen corresponding path program 108 times [2021-06-05 22:06:58,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:58,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238103797] [2021-06-05 22:06:58,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:58,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:58,177 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:58,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:58,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238103797] [2021-06-05 22:06:58,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238103797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:58,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588277720] [2021-06-05 22:06:58,177 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:58,238 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:06:58,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:58,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:06:58,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:58,396 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:58,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588277720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:58,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:58,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:06:58,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405831795] [2021-06-05 22:06:58,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:06:58,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:58,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:06:58,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:06:58,397 INFO L87 Difference]: Start difference. First operand 338 states and 1015 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:58,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:58,857 INFO L93 Difference]: Finished difference Result 651 states and 1869 transitions. [2021-06-05 22:06:58,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:06:58,858 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:06:58,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:58,858 INFO L225 Difference]: With dead ends: 651 [2021-06-05 22:06:58,858 INFO L226 Difference]: Without dead ends: 641 [2021-06-05 22:06:58,859 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 398.8ms TimeCoverageRelationStatistics Valid=155, Invalid=495, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:06:58,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2021-06-05 22:06:58,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 345. [2021-06-05 22:06:58,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 2.991279069767442) internal successors, (1029), 344 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:58,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1029 transitions. [2021-06-05 22:06:58,863 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1029 transitions. Word has length 22 [2021-06-05 22:06:58,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:58,863 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1029 transitions. [2021-06-05 22:06:58,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:58,863 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1029 transitions. [2021-06-05 22:06:58,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:06:58,863 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:58,863 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:59,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1210 [2021-06-05 22:06:59,064 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:59,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:59,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1682358634, now seen corresponding path program 109 times [2021-06-05 22:06:59,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:59,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251738268] [2021-06-05 22:06:59,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:59,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:59,140 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:59,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:59,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251738268] [2021-06-05 22:06:59,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251738268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:59,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799098055] [2021-06-05 22:06:59,140 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:59,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:59,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:06:59,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:06:59,371 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:59,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799098055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:59,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:06:59,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:06:59,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226258792] [2021-06-05 22:06:59,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:06:59,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:06:59,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:06:59,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:06:59,372 INFO L87 Difference]: Start difference. First operand 345 states and 1029 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:59,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:06:59,633 INFO L93 Difference]: Finished difference Result 540 states and 1570 transitions. [2021-06-05 22:06:59,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:06:59,633 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:06:59,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:06:59,634 INFO L225 Difference]: With dead ends: 540 [2021-06-05 22:06:59,634 INFO L226 Difference]: Without dead ends: 540 [2021-06-05 22:06:59,634 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 256.9ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:06:59,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-06-05 22:06:59,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 336. [2021-06-05 22:06:59,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.997014925373134) internal successors, (1004), 335 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:59,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1004 transitions. [2021-06-05 22:06:59,638 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1004 transitions. Word has length 22 [2021-06-05 22:06:59,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:06:59,638 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1004 transitions. [2021-06-05 22:06:59,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:06:59,638 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1004 transitions. [2021-06-05 22:06:59,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:06:59,639 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:06:59,639 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:06:59,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1221 [2021-06-05 22:06:59,839 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:06:59,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:06:59,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1100589218, now seen corresponding path program 110 times [2021-06-05 22:06:59,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:06:59,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338388700] [2021-06-05 22:06:59,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:06:59,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:06:59,913 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:06:59,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:06:59,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338388700] [2021-06-05 22:06:59,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338388700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:06:59,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299523712] [2021-06-05 22:06:59,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:06:59,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:06:59,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:06:59,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:06:59,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:00,183 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:00,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299523712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:00,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:00,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:07:00,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874316762] [2021-06-05 22:07:00,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:07:00,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:00,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:07:00,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:07:00,184 INFO L87 Difference]: Start difference. First operand 336 states and 1004 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:00,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:00,469 INFO L93 Difference]: Finished difference Result 556 states and 1597 transitions. [2021-06-05 22:07:00,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:07:00,470 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:00,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:00,471 INFO L225 Difference]: With dead ends: 556 [2021-06-05 22:07:00,471 INFO L226 Difference]: Without dead ends: 547 [2021-06-05 22:07:00,471 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 300.6ms TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:07:00,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-06-05 22:07:00,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 342. [2021-06-05 22:07:00,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.9794721407624634) internal successors, (1016), 341 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:00,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1016 transitions. [2021-06-05 22:07:00,476 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1016 transitions. Word has length 22 [2021-06-05 22:07:00,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:00,476 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1016 transitions. [2021-06-05 22:07:00,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:00,477 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1016 transitions. [2021-06-05 22:07:00,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:00,477 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:00,479 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:00,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1234 [2021-06-05 22:07:00,685 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:00,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:00,685 INFO L82 PathProgramCache]: Analyzing trace with hash 878028852, now seen corresponding path program 111 times [2021-06-05 22:07:00,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:00,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455853107] [2021-06-05 22:07:00,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:00,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:00,746 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:00,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:00,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455853107] [2021-06-05 22:07:00,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455853107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:00,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296515957] [2021-06-05 22:07:00,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:00,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:07:00,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:00,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:00,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:00,940 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:00,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296515957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:00,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:00,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 22:07:00,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319130962] [2021-06-05 22:07:00,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:07:00,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:00,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:07:00,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:07:00,941 INFO L87 Difference]: Start difference. First operand 342 states and 1016 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:01,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:01,365 INFO L93 Difference]: Finished difference Result 616 states and 1742 transitions. [2021-06-05 22:07:01,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:07:01,365 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:01,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:01,366 INFO L225 Difference]: With dead ends: 616 [2021-06-05 22:07:01,366 INFO L226 Difference]: Without dead ends: 606 [2021-06-05 22:07:01,366 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 392.8ms TimeCoverageRelationStatistics Valid=131, Invalid=421, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:07:01,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2021-06-05 22:07:01,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 364. [2021-06-05 22:07:01,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 2.975206611570248) internal successors, (1080), 363 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:01,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 1080 transitions. [2021-06-05 22:07:01,371 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 1080 transitions. Word has length 22 [2021-06-05 22:07:01,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:01,371 INFO L482 AbstractCegarLoop]: Abstraction has 364 states and 1080 transitions. [2021-06-05 22:07:01,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:01,371 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 1080 transitions. [2021-06-05 22:07:01,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:01,372 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:01,372 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:01,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1246 [2021-06-05 22:07:01,577 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:01,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:01,577 INFO L82 PathProgramCache]: Analyzing trace with hash 695938540, now seen corresponding path program 112 times [2021-06-05 22:07:01,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:01,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354496774] [2021-06-05 22:07:01,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:01,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:01,637 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:01,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:01,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354496774] [2021-06-05 22:07:01,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354496774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:01,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746996909] [2021-06-05 22:07:01,638 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:01,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:07:01,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:01,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:01,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:01,868 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:01,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746996909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:01,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:01,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 22:07:01,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878613281] [2021-06-05 22:07:01,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:07:01,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:01,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:07:01,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:07:01,869 INFO L87 Difference]: Start difference. First operand 364 states and 1080 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:02,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:02,222 INFO L93 Difference]: Finished difference Result 606 states and 1703 transitions. [2021-06-05 22:07:02,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:07:02,223 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:02,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:02,223 INFO L225 Difference]: With dead ends: 606 [2021-06-05 22:07:02,223 INFO L226 Difference]: Without dead ends: 594 [2021-06-05 22:07:02,224 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 355.0ms TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:07:02,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-06-05 22:07:02,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 344. [2021-06-05 22:07:02,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 2.9737609329446064) internal successors, (1020), 343 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:02,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1020 transitions. [2021-06-05 22:07:02,228 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1020 transitions. Word has length 22 [2021-06-05 22:07:02,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:02,228 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1020 transitions. [2021-06-05 22:07:02,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:02,228 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1020 transitions. [2021-06-05 22:07:02,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:02,228 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:02,229 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:02,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1257 [2021-06-05 22:07:02,429 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:02,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:02,429 INFO L82 PathProgramCache]: Analyzing trace with hash 266605730, now seen corresponding path program 113 times [2021-06-05 22:07:02,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:02,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182294115] [2021-06-05 22:07:02,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:02,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:02,484 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:02,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:02,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182294115] [2021-06-05 22:07:02,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182294115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:02,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914468431] [2021-06-05 22:07:02,484 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:02,547 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:07:02,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:02,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:02,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:02,702 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:02,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914468431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:02,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:02,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:07:02,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664330677] [2021-06-05 22:07:02,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:07:02,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:02,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:07:02,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:07:02,703 INFO L87 Difference]: Start difference. First operand 344 states and 1020 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:03,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:03,086 INFO L93 Difference]: Finished difference Result 474 states and 1386 transitions. [2021-06-05 22:07:03,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:07:03,087 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:03,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:03,087 INFO L225 Difference]: With dead ends: 474 [2021-06-05 22:07:03,087 INFO L226 Difference]: Without dead ends: 454 [2021-06-05 22:07:03,087 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 337.7ms TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:07:03,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-06-05 22:07:03,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 350. [2021-06-05 22:07:03,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 2.9598853868194843) internal successors, (1033), 349 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:03,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1033 transitions. [2021-06-05 22:07:03,091 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1033 transitions. Word has length 22 [2021-06-05 22:07:03,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:03,091 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 1033 transitions. [2021-06-05 22:07:03,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:03,091 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1033 transitions. [2021-06-05 22:07:03,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:03,091 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:03,092 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:03,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1271,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:03,293 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:03,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:03,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1083226646, now seen corresponding path program 114 times [2021-06-05 22:07:03,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:03,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276887593] [2021-06-05 22:07:03,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:03,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:03,352 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:03,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:03,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276887593] [2021-06-05 22:07:03,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276887593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:03,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299395991] [2021-06-05 22:07:03,352 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:03,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:07:03,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:03,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:03,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:03,561 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:03,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299395991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:03,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:03,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 22:07:03,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209691004] [2021-06-05 22:07:03,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:07:03,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:03,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:07:03,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:07:03,562 INFO L87 Difference]: Start difference. First operand 350 states and 1033 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:03,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:03,927 INFO L93 Difference]: Finished difference Result 552 states and 1564 transitions. [2021-06-05 22:07:03,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:07:03,928 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:03,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:03,929 INFO L225 Difference]: With dead ends: 552 [2021-06-05 22:07:03,929 INFO L226 Difference]: Without dead ends: 542 [2021-06-05 22:07:03,929 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 299.4ms TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:07:03,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-06-05 22:07:03,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 372. [2021-06-05 22:07:03,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 2.9568733153638815) internal successors, (1097), 371 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:03,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1097 transitions. [2021-06-05 22:07:03,933 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1097 transitions. Word has length 22 [2021-06-05 22:07:03,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:03,933 INFO L482 AbstractCegarLoop]: Abstraction has 372 states and 1097 transitions. [2021-06-05 22:07:03,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:03,933 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1097 transitions. [2021-06-05 22:07:03,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:03,933 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:03,933 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:04,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1280 [2021-06-05 22:07:04,134 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:04,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:04,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1265316958, now seen corresponding path program 115 times [2021-06-05 22:07:04,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:04,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859716413] [2021-06-05 22:07:04,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:04,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:04,192 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:04,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:04,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859716413] [2021-06-05 22:07:04,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859716413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:04,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522306239] [2021-06-05 22:07:04,192 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:04,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:04,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:04,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:04,386 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:04,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522306239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:04,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:04,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 22:07:04,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208576211] [2021-06-05 22:07:04,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:07:04,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:04,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:07:04,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:07:04,387 INFO L87 Difference]: Start difference. First operand 372 states and 1097 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:04,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:04,673 INFO L93 Difference]: Finished difference Result 509 states and 1453 transitions. [2021-06-05 22:07:04,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:07:04,673 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:04,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:04,674 INFO L225 Difference]: With dead ends: 509 [2021-06-05 22:07:04,674 INFO L226 Difference]: Without dead ends: 494 [2021-06-05 22:07:04,674 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 247.6ms TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:07:04,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-06-05 22:07:04,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 346. [2021-06-05 22:07:04,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 2.9681159420289855) internal successors, (1024), 345 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:04,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1024 transitions. [2021-06-05 22:07:04,677 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1024 transitions. Word has length 22 [2021-06-05 22:07:04,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:04,678 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 1024 transitions. [2021-06-05 22:07:04,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:04,678 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1024 transitions. [2021-06-05 22:07:04,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:04,678 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:04,678 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:04,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1291,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:04,878 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:04,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:04,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1974888418, now seen corresponding path program 116 times [2021-06-05 22:07:04,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:04,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610777249] [2021-06-05 22:07:04,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:04,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:04,948 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:04,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:04,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610777249] [2021-06-05 22:07:04,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610777249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:04,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059965391] [2021-06-05 22:07:04,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:05,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:07:05,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:05,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:05,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:05,134 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:05,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059965391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:05,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:05,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:07:05,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425931851] [2021-06-05 22:07:05,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:07:05,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:05,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:07:05,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:07:05,135 INFO L87 Difference]: Start difference. First operand 346 states and 1024 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:05,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:05,342 INFO L93 Difference]: Finished difference Result 472 states and 1360 transitions. [2021-06-05 22:07:05,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:07:05,342 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:05,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:05,343 INFO L225 Difference]: With dead ends: 472 [2021-06-05 22:07:05,343 INFO L226 Difference]: Without dead ends: 472 [2021-06-05 22:07:05,343 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 202.0ms TimeCoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:07:05,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-06-05 22:07:05,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 349. [2021-06-05 22:07:05,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.954022988505747) internal successors, (1028), 348 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:05,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1028 transitions. [2021-06-05 22:07:05,347 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1028 transitions. Word has length 22 [2021-06-05 22:07:05,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:05,347 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1028 transitions. [2021-06-05 22:07:05,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:05,347 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1028 transitions. [2021-06-05 22:07:05,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:05,347 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:05,347 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:05,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1301 [2021-06-05 22:07:05,548 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:05,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:05,548 INFO L82 PathProgramCache]: Analyzing trace with hash -480285454, now seen corresponding path program 117 times [2021-06-05 22:07:05,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:05,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996188549] [2021-06-05 22:07:05,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:05,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:05,608 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:05,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:05,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996188549] [2021-06-05 22:07:05,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996188549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:05,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544964350] [2021-06-05 22:07:05,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:05,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:07:05,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:05,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:05,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:05,795 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:05,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544964350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:05,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:05,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:07:05,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494073864] [2021-06-05 22:07:05,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:07:05,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:05,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:07:05,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:07:05,796 INFO L87 Difference]: Start difference. First operand 349 states and 1028 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:06,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:06,089 INFO L93 Difference]: Finished difference Result 499 states and 1424 transitions. [2021-06-05 22:07:06,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:07:06,089 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:06,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:06,090 INFO L225 Difference]: With dead ends: 499 [2021-06-05 22:07:06,090 INFO L226 Difference]: Without dead ends: 489 [2021-06-05 22:07:06,090 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 258.4ms TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:07:06,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-06-05 22:07:06,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 346. [2021-06-05 22:07:06,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 2.944927536231884) internal successors, (1016), 345 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:06,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1016 transitions. [2021-06-05 22:07:06,095 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1016 transitions. Word has length 22 [2021-06-05 22:07:06,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:06,095 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 1016 transitions. [2021-06-05 22:07:06,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:06,095 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1016 transitions. [2021-06-05 22:07:06,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:06,096 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:06,096 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:06,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1306 [2021-06-05 22:07:06,309 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:06,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:06,309 INFO L82 PathProgramCache]: Analyzing trace with hash -55338244, now seen corresponding path program 118 times [2021-06-05 22:07:06,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:06,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290637375] [2021-06-05 22:07:06,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:06,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:06,368 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:06,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:06,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290637375] [2021-06-05 22:07:06,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290637375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:06,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402146684] [2021-06-05 22:07:06,369 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:06,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:07:06,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:06,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:06,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:06,571 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:06,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402146684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:06,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:06,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:07:06,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530699677] [2021-06-05 22:07:06,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:07:06,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:06,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:07:06,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:07:06,572 INFO L87 Difference]: Start difference. First operand 346 states and 1016 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:06,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:06,838 INFO L93 Difference]: Finished difference Result 450 states and 1308 transitions. [2021-06-05 22:07:06,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:07:06,839 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:06,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:06,839 INFO L225 Difference]: With dead ends: 450 [2021-06-05 22:07:06,839 INFO L226 Difference]: Without dead ends: 430 [2021-06-05 22:07:06,839 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 215.3ms TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:07:06,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-06-05 22:07:06,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 328. [2021-06-05 22:07:06,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.948012232415902) internal successors, (964), 327 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:06,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 964 transitions. [2021-06-05 22:07:06,843 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 964 transitions. Word has length 22 [2021-06-05 22:07:06,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:06,843 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 964 transitions. [2021-06-05 22:07:06,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:06,843 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 964 transitions. [2021-06-05 22:07:06,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:06,843 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:06,843 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:07,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1312 [2021-06-05 22:07:07,044 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:07,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:07,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1651654990, now seen corresponding path program 119 times [2021-06-05 22:07:07,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:07,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49585262] [2021-06-05 22:07:07,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:07,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:07,114 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:07,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:07,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49585262] [2021-06-05 22:07:07,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49585262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:07,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558859447] [2021-06-05 22:07:07,114 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:07,189 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:07:07,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:07,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:07,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:07,310 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:07,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558859447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:07,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:07,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:07:07,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472925598] [2021-06-05 22:07:07,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:07:07,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:07,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:07:07,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:07:07,311 INFO L87 Difference]: Start difference. First operand 328 states and 964 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:07,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:07,561 INFO L93 Difference]: Finished difference Result 531 states and 1544 transitions. [2021-06-05 22:07:07,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:07:07,561 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:07,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:07,562 INFO L225 Difference]: With dead ends: 531 [2021-06-05 22:07:07,562 INFO L226 Difference]: Without dead ends: 531 [2021-06-05 22:07:07,562 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 249.4ms TimeCoverageRelationStatistics Valid=137, Invalid=369, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:07:07,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-06-05 22:07:07,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 340. [2021-06-05 22:07:07,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.9852507374631267) internal successors, (1012), 339 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:07,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1012 transitions. [2021-06-05 22:07:07,565 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1012 transitions. Word has length 22 [2021-06-05 22:07:07,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:07,566 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1012 transitions. [2021-06-05 22:07:07,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:07,566 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1012 transitions. [2021-06-05 22:07:07,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:07,566 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:07,566 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:07,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1316,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:07,767 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:07,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:07,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1148709342, now seen corresponding path program 120 times [2021-06-05 22:07:07,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:07,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877131174] [2021-06-05 22:07:07,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:07,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:07,841 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:07,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:07,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877131174] [2021-06-05 22:07:07,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877131174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:07,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434067345] [2021-06-05 22:07:07,841 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:07,906 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:07:07,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:07,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:07,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:08,033 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:08,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434067345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:08,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:08,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:07:08,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933649512] [2021-06-05 22:07:08,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:07:08,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:08,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:07:08,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:07:08,034 INFO L87 Difference]: Start difference. First operand 340 states and 1012 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:08,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:08,313 INFO L93 Difference]: Finished difference Result 503 states and 1458 transitions. [2021-06-05 22:07:08,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:07:08,313 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:08,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:08,314 INFO L225 Difference]: With dead ends: 503 [2021-06-05 22:07:08,314 INFO L226 Difference]: Without dead ends: 493 [2021-06-05 22:07:08,314 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 260.9ms TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:07:08,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-06-05 22:07:08,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 347. [2021-06-05 22:07:08,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.9653179190751446) internal successors, (1026), 346 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:08,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1026 transitions. [2021-06-05 22:07:08,318 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1026 transitions. Word has length 22 [2021-06-05 22:07:08,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:08,318 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1026 transitions. [2021-06-05 22:07:08,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:08,318 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1026 transitions. [2021-06-05 22:07:08,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:08,318 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:08,318 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:08,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1322 [2021-06-05 22:07:08,519 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:08,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:08,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1467821662, now seen corresponding path program 121 times [2021-06-05 22:07:08,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:08,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579289106] [2021-06-05 22:07:08,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:08,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:08,588 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:08,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:08,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579289106] [2021-06-05 22:07:08,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579289106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:08,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418234855] [2021-06-05 22:07:08,588 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:08,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:08,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:08,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:08,771 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:08,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418234855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:08,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:08,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:07:08,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159544700] [2021-06-05 22:07:08,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:07:08,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:08,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:07:08,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:07:08,772 INFO L87 Difference]: Start difference. First operand 347 states and 1026 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:09,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:09,002 INFO L93 Difference]: Finished difference Result 431 states and 1272 transitions. [2021-06-05 22:07:09,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:07:09,002 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:09,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:09,003 INFO L225 Difference]: With dead ends: 431 [2021-06-05 22:07:09,003 INFO L226 Difference]: Without dead ends: 431 [2021-06-05 22:07:09,003 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 228.5ms TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:07:09,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-06-05 22:07:09,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 325. [2021-06-05 22:07:09,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.947530864197531) internal successors, (955), 324 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:09,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 955 transitions. [2021-06-05 22:07:09,006 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 955 transitions. Word has length 22 [2021-06-05 22:07:09,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:09,007 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 955 transitions. [2021-06-05 22:07:09,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:09,007 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 955 transitions. [2021-06-05 22:07:09,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:09,007 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:09,007 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:09,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1327,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:09,208 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:09,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:09,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1676258398, now seen corresponding path program 122 times [2021-06-05 22:07:09,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:09,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880236665] [2021-06-05 22:07:09,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:09,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:09,276 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:09,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:09,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880236665] [2021-06-05 22:07:09,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880236665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:09,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214522993] [2021-06-05 22:07:09,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:09,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:07:09,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:09,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:09,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:09,488 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:09,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214522993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:09,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:09,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:07:09,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321715118] [2021-06-05 22:07:09,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:07:09,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:09,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:07:09,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:07:09,489 INFO L87 Difference]: Start difference. First operand 325 states and 955 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:09,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:09,790 INFO L93 Difference]: Finished difference Result 688 states and 1965 transitions. [2021-06-05 22:07:09,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:07:09,790 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:09,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:09,791 INFO L225 Difference]: With dead ends: 688 [2021-06-05 22:07:09,791 INFO L226 Difference]: Without dead ends: 688 [2021-06-05 22:07:09,791 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 309.3ms TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:07:09,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2021-06-05 22:07:09,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 339. [2021-06-05 22:07:09,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 3.0118343195266273) internal successors, (1018), 338 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:09,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1018 transitions. [2021-06-05 22:07:09,795 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1018 transitions. Word has length 22 [2021-06-05 22:07:09,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:09,795 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1018 transitions. [2021-06-05 22:07:09,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:09,796 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1018 transitions. [2021-06-05 22:07:09,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:09,796 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:09,796 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:09,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1331 [2021-06-05 22:07:09,996 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:09,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:09,997 INFO L82 PathProgramCache]: Analyzing trace with hash -181655434, now seen corresponding path program 123 times [2021-06-05 22:07:09,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:09,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105133519] [2021-06-05 22:07:09,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:10,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:10,064 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:10,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:10,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105133519] [2021-06-05 22:07:10,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105133519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:10,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326728427] [2021-06-05 22:07:10,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:10,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:07:10,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:10,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:10,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:10,277 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:10,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326728427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:10,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:10,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:07:10,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146748431] [2021-06-05 22:07:10,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:07:10,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:10,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:07:10,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:07:10,278 INFO L87 Difference]: Start difference. First operand 339 states and 1018 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:10,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:10,581 INFO L93 Difference]: Finished difference Result 627 states and 1798 transitions. [2021-06-05 22:07:10,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:07:10,581 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:10,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:10,582 INFO L225 Difference]: With dead ends: 627 [2021-06-05 22:07:10,582 INFO L226 Difference]: Without dead ends: 617 [2021-06-05 22:07:10,582 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 254.5ms TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:07:10,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2021-06-05 22:07:10,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 346. [2021-06-05 22:07:10,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 2.991304347826087) internal successors, (1032), 345 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:10,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1032 transitions. [2021-06-05 22:07:10,588 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1032 transitions. Word has length 22 [2021-06-05 22:07:10,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:10,588 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 1032 transitions. [2021-06-05 22:07:10,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:10,588 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1032 transitions. [2021-06-05 22:07:10,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:10,589 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:10,589 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:10,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1342 [2021-06-05 22:07:10,813 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:10,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:10,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1268876522, now seen corresponding path program 124 times [2021-06-05 22:07:10,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:10,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932584341] [2021-06-05 22:07:10,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:10,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:10,896 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:10,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:10,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932584341] [2021-06-05 22:07:10,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932584341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:10,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888036332] [2021-06-05 22:07:10,897 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:10,962 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:07:10,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:10,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:10,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:11,126 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:11,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888036332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:11,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:11,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:07:11,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664867409] [2021-06-05 22:07:11,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:07:11,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:11,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:07:11,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:07:11,127 INFO L87 Difference]: Start difference. First operand 346 states and 1032 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:11,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:11,329 INFO L93 Difference]: Finished difference Result 621 states and 1807 transitions. [2021-06-05 22:07:11,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:07:11,329 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:11,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:11,333 INFO L225 Difference]: With dead ends: 621 [2021-06-05 22:07:11,333 INFO L226 Difference]: Without dead ends: 621 [2021-06-05 22:07:11,333 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 225.2ms TimeCoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:07:11,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-06-05 22:07:11,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 352. [2021-06-05 22:07:11,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 3.017094017094017) internal successors, (1059), 351 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:11,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1059 transitions. [2021-06-05 22:07:11,337 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1059 transitions. Word has length 22 [2021-06-05 22:07:11,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:11,338 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 1059 transitions. [2021-06-05 22:07:11,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:11,338 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1059 transitions. [2021-06-05 22:07:11,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:11,338 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:11,338 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:11,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1354 [2021-06-05 22:07:11,539 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:11,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:11,539 INFO L82 PathProgramCache]: Analyzing trace with hash -243142922, now seen corresponding path program 125 times [2021-06-05 22:07:11,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:11,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184161037] [2021-06-05 22:07:11,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:11,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:11,612 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:11,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:11,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184161037] [2021-06-05 22:07:11,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184161037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:11,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755413494] [2021-06-05 22:07:11,612 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:11,678 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:07:11,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:11,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:11,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:11,816 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:11,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755413494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:11,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:11,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:07:11,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456530049] [2021-06-05 22:07:11,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:07:11,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:11,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:07:11,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:07:11,817 INFO L87 Difference]: Start difference. First operand 352 states and 1059 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:12,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:12,110 INFO L93 Difference]: Finished difference Result 637 states and 1834 transitions. [2021-06-05 22:07:12,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:07:12,111 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:12,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:12,111 INFO L225 Difference]: With dead ends: 637 [2021-06-05 22:07:12,112 INFO L226 Difference]: Without dead ends: 628 [2021-06-05 22:07:12,112 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 254.7ms TimeCoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:07:12,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-06-05 22:07:12,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 358. [2021-06-05 22:07:12,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 3.0) internal successors, (1071), 357 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:12,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 1071 transitions. [2021-06-05 22:07:12,116 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 1071 transitions. Word has length 22 [2021-06-05 22:07:12,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:12,116 INFO L482 AbstractCegarLoop]: Abstraction has 358 states and 1071 transitions. [2021-06-05 22:07:12,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:12,116 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 1071 transitions. [2021-06-05 22:07:12,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:12,116 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:12,117 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:12,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1367 [2021-06-05 22:07:12,317 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:12,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:12,317 INFO L82 PathProgramCache]: Analyzing trace with hash -465703288, now seen corresponding path program 126 times [2021-06-05 22:07:12,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:12,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217017029] [2021-06-05 22:07:12,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:12,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:12,383 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:12,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:12,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217017029] [2021-06-05 22:07:12,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217017029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:12,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117631261] [2021-06-05 22:07:12,383 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:12,452 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:07:12,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:12,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:12,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:12,615 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:12,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117631261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:12,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:12,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 22:07:12,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650233673] [2021-06-05 22:07:12,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:07:12,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:12,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:07:12,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:07:12,616 INFO L87 Difference]: Start difference. First operand 358 states and 1071 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:12,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:12,945 INFO L93 Difference]: Finished difference Result 592 states and 1704 transitions. [2021-06-05 22:07:12,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:07:12,945 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:12,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:12,946 INFO L225 Difference]: With dead ends: 592 [2021-06-05 22:07:12,946 INFO L226 Difference]: Without dead ends: 582 [2021-06-05 22:07:12,946 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 276.2ms TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:07:12,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-06-05 22:07:12,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 370. [2021-06-05 22:07:12,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 3.005420054200542) internal successors, (1109), 369 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:12,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1109 transitions. [2021-06-05 22:07:12,950 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1109 transitions. Word has length 22 [2021-06-05 22:07:12,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:12,950 INFO L482 AbstractCegarLoop]: Abstraction has 370 states and 1109 transitions. [2021-06-05 22:07:12,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:12,950 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1109 transitions. [2021-06-05 22:07:12,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:12,951 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:12,951 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:13,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1378 [2021-06-05 22:07:13,152 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:13,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:13,152 INFO L82 PathProgramCache]: Analyzing trace with hash -647793600, now seen corresponding path program 127 times [2021-06-05 22:07:13,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:13,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957280323] [2021-06-05 22:07:13,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:13,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:13,216 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:13,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:13,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957280323] [2021-06-05 22:07:13,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957280323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:13,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20539507] [2021-06-05 22:07:13,216 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:13,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:13,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:13,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:13,426 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:13,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20539507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:13,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:13,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 22:07:13,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027914320] [2021-06-05 22:07:13,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:07:13,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:13,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:07:13,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:07:13,427 INFO L87 Difference]: Start difference. First operand 370 states and 1109 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:13,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:13,741 INFO L93 Difference]: Finished difference Result 623 states and 1767 transitions. [2021-06-05 22:07:13,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:07:13,742 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:13,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:13,742 INFO L225 Difference]: With dead ends: 623 [2021-06-05 22:07:13,742 INFO L226 Difference]: Without dead ends: 611 [2021-06-05 22:07:13,742 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 251.9ms TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:07:13,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2021-06-05 22:07:13,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 366. [2021-06-05 22:07:13,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 3.0054794520547947) internal successors, (1097), 365 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:13,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1097 transitions. [2021-06-05 22:07:13,747 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1097 transitions. Word has length 22 [2021-06-05 22:07:13,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:13,747 INFO L482 AbstractCegarLoop]: Abstraction has 366 states and 1097 transitions. [2021-06-05 22:07:13,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:13,747 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1097 transitions. [2021-06-05 22:07:13,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:13,748 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:13,748 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:13,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1391,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:13,969 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:13,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:13,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1770086426, now seen corresponding path program 128 times [2021-06-05 22:07:13,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:13,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736194060] [2021-06-05 22:07:13,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:13,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:14,039 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:14,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:14,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736194060] [2021-06-05 22:07:14,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736194060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:14,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617104915] [2021-06-05 22:07:14,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:14,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:07:14,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:14,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:14,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:14,268 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:14,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617104915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:14,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:14,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:07:14,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459134792] [2021-06-05 22:07:14,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:07:14,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:14,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:07:14,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:07:14,269 INFO L87 Difference]: Start difference. First operand 366 states and 1097 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:14,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:14,602 INFO L93 Difference]: Finished difference Result 571 states and 1657 transitions. [2021-06-05 22:07:14,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:07:14,602 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:14,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:14,603 INFO L225 Difference]: With dead ends: 571 [2021-06-05 22:07:14,603 INFO L226 Difference]: Without dead ends: 571 [2021-06-05 22:07:14,603 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 322.6ms TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:07:14,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-06-05 22:07:14,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 371. [2021-06-05 22:07:14,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 3.0) internal successors, (1110), 370 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:14,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 1110 transitions. [2021-06-05 22:07:14,607 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 1110 transitions. Word has length 22 [2021-06-05 22:07:14,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:14,607 INFO L482 AbstractCegarLoop]: Abstraction has 371 states and 1110 transitions. [2021-06-05 22:07:14,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:14,607 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 1110 transitions. [2021-06-05 22:07:14,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:14,608 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:14,608 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:14,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1400 [2021-06-05 22:07:14,816 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:14,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:14,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1030277906, now seen corresponding path program 129 times [2021-06-05 22:07:14,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:14,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139066780] [2021-06-05 22:07:14,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:14,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:14,885 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:14,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:14,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139066780] [2021-06-05 22:07:14,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139066780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:14,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355161570] [2021-06-05 22:07:14,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:14,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:07:14,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:14,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:14,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:15,089 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:15,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355161570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:15,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:15,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:07:15,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634348687] [2021-06-05 22:07:15,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:07:15,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:15,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:07:15,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:07:15,092 INFO L87 Difference]: Start difference. First operand 371 states and 1110 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:15,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:15,331 INFO L93 Difference]: Finished difference Result 543 states and 1580 transitions. [2021-06-05 22:07:15,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:07:15,331 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:15,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:15,332 INFO L225 Difference]: With dead ends: 543 [2021-06-05 22:07:15,332 INFO L226 Difference]: Without dead ends: 533 [2021-06-05 22:07:15,332 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 231.3ms TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:07:15,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-06-05 22:07:15,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 350. [2021-06-05 22:07:15,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 2.9713467048710602) internal successors, (1037), 349 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:15,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1037 transitions. [2021-06-05 22:07:15,336 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1037 transitions. Word has length 22 [2021-06-05 22:07:15,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:15,336 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 1037 transitions. [2021-06-05 22:07:15,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:15,336 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1037 transitions. [2021-06-05 22:07:15,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:15,337 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:15,337 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:15,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1409,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:15,553 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:15,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:15,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1576611606, now seen corresponding path program 130 times [2021-06-05 22:07:15,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:15,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840693533] [2021-06-05 22:07:15,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:15,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:15,623 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:15,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:15,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840693533] [2021-06-05 22:07:15,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840693533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:15,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180485676] [2021-06-05 22:07:15,624 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:15,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:07:15,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:15,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:15,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:15,847 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:15,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180485676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:15,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:15,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:07:15,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894167177] [2021-06-05 22:07:15,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:07:15,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:15,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:07:15,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:07:15,848 INFO L87 Difference]: Start difference. First operand 350 states and 1037 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:16,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:16,112 INFO L93 Difference]: Finished difference Result 476 states and 1410 transitions. [2021-06-05 22:07:16,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:07:16,112 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:16,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:16,113 INFO L225 Difference]: With dead ends: 476 [2021-06-05 22:07:16,113 INFO L226 Difference]: Without dead ends: 476 [2021-06-05 22:07:16,113 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 268.3ms TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:07:16,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-06-05 22:07:16,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 347. [2021-06-05 22:07:16,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.9710982658959537) internal successors, (1028), 346 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:16,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1028 transitions. [2021-06-05 22:07:16,117 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1028 transitions. Word has length 22 [2021-06-05 22:07:16,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:16,117 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1028 transitions. [2021-06-05 22:07:16,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:16,117 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1028 transitions. [2021-06-05 22:07:16,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:16,117 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:16,117 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:16,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1418,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:16,325 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:16,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:16,325 INFO L82 PathProgramCache]: Analyzing trace with hash -852679658, now seen corresponding path program 131 times [2021-06-05 22:07:16,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:16,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433635069] [2021-06-05 22:07:16,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:16,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:16,396 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:16,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:16,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433635069] [2021-06-05 22:07:16,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433635069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:16,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610346423] [2021-06-05 22:07:16,396 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:16,464 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:07:16,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:16,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:16,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:16,602 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:16,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610346423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:16,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:16,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:07:16,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293423883] [2021-06-05 22:07:16,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:07:16,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:16,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:07:16,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:07:16,603 INFO L87 Difference]: Start difference. First operand 347 states and 1028 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:16,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:16,838 INFO L93 Difference]: Finished difference Result 525 states and 1504 transitions. [2021-06-05 22:07:16,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:07:16,839 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:16,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:16,839 INFO L225 Difference]: With dead ends: 525 [2021-06-05 22:07:16,839 INFO L226 Difference]: Without dead ends: 525 [2021-06-05 22:07:16,839 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 242.2ms TimeCoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:07:16,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-06-05 22:07:16,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 355. [2021-06-05 22:07:16,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.983050847457627) internal successors, (1056), 354 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:16,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1056 transitions. [2021-06-05 22:07:16,843 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1056 transitions. Word has length 22 [2021-06-05 22:07:16,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:16,843 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 1056 transitions. [2021-06-05 22:07:16,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:16,843 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1056 transitions. [2021-06-05 22:07:16,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:16,844 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:16,844 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:17,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1422 [2021-06-05 22:07:17,044 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:17,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:17,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1930268194, now seen corresponding path program 132 times [2021-06-05 22:07:17,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:17,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822291878] [2021-06-05 22:07:17,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:17,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:17,114 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:17,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:17,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822291878] [2021-06-05 22:07:17,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822291878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:17,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771389135] [2021-06-05 22:07:17,114 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:17,183 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:07:17,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:17,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:17,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:17,320 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:17,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771389135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:17,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:17,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:07:17,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073859099] [2021-06-05 22:07:17,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:07:17,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:17,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:07:17,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:07:17,321 INFO L87 Difference]: Start difference. First operand 355 states and 1056 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:17,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:17,621 INFO L93 Difference]: Finished difference Result 496 states and 1427 transitions. [2021-06-05 22:07:17,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:07:17,621 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:17,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:17,622 INFO L225 Difference]: With dead ends: 496 [2021-06-05 22:07:17,622 INFO L226 Difference]: Without dead ends: 487 [2021-06-05 22:07:17,622 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 283.2ms TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:07:17,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-06-05 22:07:17,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 355. [2021-06-05 22:07:17,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.9548022598870056) internal successors, (1046), 354 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:17,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1046 transitions. [2021-06-05 22:07:17,625 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1046 transitions. Word has length 22 [2021-06-05 22:07:17,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:17,626 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 1046 transitions. [2021-06-05 22:07:17,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:17,626 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1046 transitions. [2021-06-05 22:07:17,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:17,626 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:17,626 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:17,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1430 [2021-06-05 22:07:17,827 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:17,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:17,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1752344734, now seen corresponding path program 133 times [2021-06-05 22:07:17,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:17,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376072234] [2021-06-05 22:07:17,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:17,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:17,899 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:17,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:17,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376072234] [2021-06-05 22:07:17,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376072234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:17,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770756542] [2021-06-05 22:07:17,899 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:17,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:17,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:17,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:18,114 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:18,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770756542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:18,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:18,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:07:18,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235785178] [2021-06-05 22:07:18,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:07:18,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:18,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:07:18,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:07:18,115 INFO L87 Difference]: Start difference. First operand 355 states and 1046 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:18,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:18,366 INFO L93 Difference]: Finished difference Result 435 states and 1284 transitions. [2021-06-05 22:07:18,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:07:18,366 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:18,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:18,367 INFO L225 Difference]: With dead ends: 435 [2021-06-05 22:07:18,367 INFO L226 Difference]: Without dead ends: 435 [2021-06-05 22:07:18,367 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 265.0ms TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:07:18,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-06-05 22:07:18,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 324. [2021-06-05 22:07:18,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.9473684210526314) internal successors, (952), 323 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:18,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 952 transitions. [2021-06-05 22:07:18,370 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 952 transitions. Word has length 22 [2021-06-05 22:07:18,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:18,370 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 952 transitions. [2021-06-05 22:07:18,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:18,370 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 952 transitions. [2021-06-05 22:07:18,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:18,371 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:18,371 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:18,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1441 [2021-06-05 22:07:18,571 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:18,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:18,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1705035186, now seen corresponding path program 134 times [2021-06-05 22:07:18,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:18,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698497758] [2021-06-05 22:07:18,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:18,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:18,633 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:18,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:18,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698497758] [2021-06-05 22:07:18,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698497758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:18,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573035077] [2021-06-05 22:07:18,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:18,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:07:18,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:18,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:18,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:18,867 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:18,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573035077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:18,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:18,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:07:18,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735251886] [2021-06-05 22:07:18,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:07:18,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:18,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:07:18,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:07:18,868 INFO L87 Difference]: Start difference. First operand 324 states and 952 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:19,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:19,196 INFO L93 Difference]: Finished difference Result 750 states and 2186 transitions. [2021-06-05 22:07:19,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:07:19,196 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:19,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:19,197 INFO L225 Difference]: With dead ends: 750 [2021-06-05 22:07:19,197 INFO L226 Difference]: Without dead ends: 750 [2021-06-05 22:07:19,197 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 344.7ms TimeCoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:07:19,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2021-06-05 22:07:19,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 344. [2021-06-05 22:07:19,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.008746355685131) internal successors, (1032), 343 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:19,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1032 transitions. [2021-06-05 22:07:19,202 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1032 transitions. Word has length 22 [2021-06-05 22:07:19,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:19,202 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1032 transitions. [2021-06-05 22:07:19,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:19,202 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1032 transitions. [2021-06-05 22:07:19,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:19,203 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:19,203 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:19,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1448 [2021-06-05 22:07:19,403 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:19,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:19,404 INFO L82 PathProgramCache]: Analyzing trace with hash -210432222, now seen corresponding path program 135 times [2021-06-05 22:07:19,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:19,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732313429] [2021-06-05 22:07:19,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:19,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:19,463 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:19,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:19,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732313429] [2021-06-05 22:07:19,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732313429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:19,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769526566] [2021-06-05 22:07:19,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:19,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:07:19,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:19,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:19,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:19,700 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:19,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769526566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:19,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:19,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:07:19,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761314785] [2021-06-05 22:07:19,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:07:19,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:19,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:07:19,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:07:19,701 INFO L87 Difference]: Start difference. First operand 344 states and 1032 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:20,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:20,289 INFO L93 Difference]: Finished difference Result 773 states and 2241 transitions. [2021-06-05 22:07:20,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:07:20,290 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:20,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:20,291 INFO L225 Difference]: With dead ends: 773 [2021-06-05 22:07:20,291 INFO L226 Difference]: Without dead ends: 763 [2021-06-05 22:07:20,291 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 547.8ms TimeCoverageRelationStatistics Valid=214, Invalid=716, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:07:20,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2021-06-05 22:07:20,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 341. [2021-06-05 22:07:20,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 3.0) internal successors, (1020), 340 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:20,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1020 transitions. [2021-06-05 22:07:20,295 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1020 transitions. Word has length 22 [2021-06-05 22:07:20,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:20,295 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1020 transitions. [2021-06-05 22:07:20,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:20,295 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1020 transitions. [2021-06-05 22:07:20,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:20,296 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:20,296 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:20,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1462 [2021-06-05 22:07:20,496 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:20,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:20,496 INFO L82 PathProgramCache]: Analyzing trace with hash 214514988, now seen corresponding path program 136 times [2021-06-05 22:07:20,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:20,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465612184] [2021-06-05 22:07:20,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:20,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:20,556 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:20,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:20,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465612184] [2021-06-05 22:07:20,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465612184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:20,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281960094] [2021-06-05 22:07:20,556 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:20,625 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:07:20,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:20,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:20,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:20,788 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:20,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281960094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:20,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:20,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:07:20,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530447951] [2021-06-05 22:07:20,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:07:20,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:20,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:07:20,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:07:20,789 INFO L87 Difference]: Start difference. First operand 341 states and 1020 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:21,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:21,189 INFO L93 Difference]: Finished difference Result 747 states and 2178 transitions. [2021-06-05 22:07:21,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:07:21,189 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:21,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:21,190 INFO L225 Difference]: With dead ends: 747 [2021-06-05 22:07:21,190 INFO L226 Difference]: Without dead ends: 727 [2021-06-05 22:07:21,190 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 400.6ms TimeCoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:07:21,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2021-06-05 22:07:21,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 338. [2021-06-05 22:07:21,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.9910979228486645) internal successors, (1008), 337 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:21,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1008 transitions. [2021-06-05 22:07:21,196 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1008 transitions. Word has length 22 [2021-06-05 22:07:21,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:21,196 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1008 transitions. [2021-06-05 22:07:21,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:21,196 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1008 transitions. [2021-06-05 22:07:21,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:21,197 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:21,197 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:21,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1473 [2021-06-05 22:07:21,419 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:21,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:21,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1986111548, now seen corresponding path program 137 times [2021-06-05 22:07:21,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:21,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453054423] [2021-06-05 22:07:21,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:21,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:21,475 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:21,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:21,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453054423] [2021-06-05 22:07:21,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453054423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:21,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754273358] [2021-06-05 22:07:21,475 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:21,544 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:07:21,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:21,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:21,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:21,681 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:21,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754273358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:21,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:21,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:07:21,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452085144] [2021-06-05 22:07:21,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:07:21,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:21,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:07:21,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:07:21,682 INFO L87 Difference]: Start difference. First operand 338 states and 1008 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:22,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:22,027 INFO L93 Difference]: Finished difference Result 756 states and 2173 transitions. [2021-06-05 22:07:22,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:07:22,027 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:22,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:22,028 INFO L225 Difference]: With dead ends: 756 [2021-06-05 22:07:22,028 INFO L226 Difference]: Without dead ends: 720 [2021-06-05 22:07:22,028 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 306.3ms TimeCoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:07:22,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2021-06-05 22:07:22,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 332. [2021-06-05 22:07:22,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.972809667673716) internal successors, (984), 331 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:22,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 984 transitions. [2021-06-05 22:07:22,032 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 984 transitions. Word has length 22 [2021-06-05 22:07:22,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:22,032 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 984 transitions. [2021-06-05 22:07:22,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:22,032 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 984 transitions. [2021-06-05 22:07:22,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:22,033 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:22,033 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:22,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1481,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:22,233 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:22,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:22,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1654265104, now seen corresponding path program 138 times [2021-06-05 22:07:22,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:22,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091060162] [2021-06-05 22:07:22,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:22,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:22,311 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:22,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:22,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091060162] [2021-06-05 22:07:22,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091060162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:22,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980351018] [2021-06-05 22:07:22,312 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:22,380 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:07:22,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:22,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:22,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:22,533 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:22,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980351018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:22,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:22,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:07:22,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663275968] [2021-06-05 22:07:22,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:07:22,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:22,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:07:22,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:07:22,535 INFO L87 Difference]: Start difference. First operand 332 states and 984 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:22,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:22,894 INFO L93 Difference]: Finished difference Result 659 states and 1924 transitions. [2021-06-05 22:07:22,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:07:22,894 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:22,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:22,895 INFO L225 Difference]: With dead ends: 659 [2021-06-05 22:07:22,895 INFO L226 Difference]: Without dead ends: 659 [2021-06-05 22:07:22,895 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 356.6ms TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:07:22,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2021-06-05 22:07:22,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 340. [2021-06-05 22:07:22,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.0) internal successors, (1017), 339 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:22,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1017 transitions. [2021-06-05 22:07:22,899 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1017 transitions. Word has length 22 [2021-06-05 22:07:22,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:22,899 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1017 transitions. [2021-06-05 22:07:22,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:22,899 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1017 transitions. [2021-06-05 22:07:22,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:22,900 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:22,900 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:23,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1489 [2021-06-05 22:07:23,100 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:23,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:23,101 INFO L82 PathProgramCache]: Analyzing trace with hash -159662140, now seen corresponding path program 139 times [2021-06-05 22:07:23,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:23,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833233880] [2021-06-05 22:07:23,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:23,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:23,174 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:23,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:23,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833233880] [2021-06-05 22:07:23,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833233880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:23,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560807165] [2021-06-05 22:07:23,175 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:23,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:23,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:23,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:23,427 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:23,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560807165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:23,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:23,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:07:23,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364444709] [2021-06-05 22:07:23,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:07:23,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:23,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:07:23,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:07:23,428 INFO L87 Difference]: Start difference. First operand 340 states and 1017 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:24,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:24,236 INFO L93 Difference]: Finished difference Result 743 states and 2162 transitions. [2021-06-05 22:07:24,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:07:24,236 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:24,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:24,237 INFO L225 Difference]: With dead ends: 743 [2021-06-05 22:07:24,237 INFO L226 Difference]: Without dead ends: 733 [2021-06-05 22:07:24,237 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 777.4ms TimeCoverageRelationStatistics Valid=240, Invalid=882, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:07:24,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2021-06-05 22:07:24,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 337. [2021-06-05 22:07:24,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.9910714285714284) internal successors, (1005), 336 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:24,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1005 transitions. [2021-06-05 22:07:24,242 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1005 transitions. Word has length 22 [2021-06-05 22:07:24,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:24,242 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1005 transitions. [2021-06-05 22:07:24,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:24,242 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1005 transitions. [2021-06-05 22:07:24,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:24,242 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:24,242 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:24,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1501,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:24,443 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:24,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:24,443 INFO L82 PathProgramCache]: Analyzing trace with hash 265285070, now seen corresponding path program 140 times [2021-06-05 22:07:24,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:24,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450002312] [2021-06-05 22:07:24,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:24,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:24,499 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:24,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:24,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450002312] [2021-06-05 22:07:24,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450002312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:24,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611111620] [2021-06-05 22:07:24,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:24,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:07:24,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:24,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:24,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:24,773 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:24,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611111620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:24,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:24,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:07:24,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695683674] [2021-06-05 22:07:24,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:07:24,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:24,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:07:24,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:07:24,774 INFO L87 Difference]: Start difference. First operand 337 states and 1005 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:25,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:25,321 INFO L93 Difference]: Finished difference Result 667 states and 1949 transitions. [2021-06-05 22:07:25,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:07:25,322 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:25,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:25,322 INFO L225 Difference]: With dead ends: 667 [2021-06-05 22:07:25,322 INFO L226 Difference]: Without dead ends: 647 [2021-06-05 22:07:25,323 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 509.5ms TimeCoverageRelationStatistics Valid=202, Invalid=728, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:07:25,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2021-06-05 22:07:25,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 334. [2021-06-05 22:07:25,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.981981981981982) internal successors, (993), 333 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:25,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 993 transitions. [2021-06-05 22:07:25,327 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 993 transitions. Word has length 22 [2021-06-05 22:07:25,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:25,327 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 993 transitions. [2021-06-05 22:07:25,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:25,327 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 993 transitions. [2021-06-05 22:07:25,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:25,327 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:25,327 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:25,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1513 [2021-06-05 22:07:25,528 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:25,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:25,528 INFO L82 PathProgramCache]: Analyzing trace with hash -549395800, now seen corresponding path program 141 times [2021-06-05 22:07:25,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:25,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971424818] [2021-06-05 22:07:25,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:25,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:25,597 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:25,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:25,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971424818] [2021-06-05 22:07:25,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971424818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:25,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652188786] [2021-06-05 22:07:25,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:25,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:07:25,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:25,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:25,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:25,830 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:25,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652188786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:25,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:25,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:07:25,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535058024] [2021-06-05 22:07:25,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:07:25,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:25,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:07:25,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:07:25,831 INFO L87 Difference]: Start difference. First operand 334 states and 993 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:26,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:26,364 INFO L93 Difference]: Finished difference Result 777 states and 2260 transitions. [2021-06-05 22:07:26,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:07:26,364 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:26,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:26,365 INFO L225 Difference]: With dead ends: 777 [2021-06-05 22:07:26,365 INFO L226 Difference]: Without dead ends: 777 [2021-06-05 22:07:26,365 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 502.9ms TimeCoverageRelationStatistics Valid=162, Invalid=438, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:07:26,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2021-06-05 22:07:26,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 344. [2021-06-05 22:07:26,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.0320699708454812) internal successors, (1040), 343 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:26,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1040 transitions. [2021-06-05 22:07:26,370 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1040 transitions. Word has length 22 [2021-06-05 22:07:26,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:26,370 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1040 transitions. [2021-06-05 22:07:26,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:26,370 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1040 transitions. [2021-06-05 22:07:26,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:26,370 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:26,370 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:26,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1521 [2021-06-05 22:07:26,571 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:26,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:26,571 INFO L82 PathProgramCache]: Analyzing trace with hash 945207164, now seen corresponding path program 142 times [2021-06-05 22:07:26,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:26,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486486783] [2021-06-05 22:07:26,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:26,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:26,640 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:26,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:26,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486486783] [2021-06-05 22:07:26,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486486783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:26,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069078834] [2021-06-05 22:07:26,640 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:26,714 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:07:26,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:26,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:26,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:26,896 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:26,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069078834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:26,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:26,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:07:26,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194162437] [2021-06-05 22:07:26,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:07:26,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:26,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:07:26,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:07:26,897 INFO L87 Difference]: Start difference. First operand 344 states and 1040 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:27,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:27,964 INFO L93 Difference]: Finished difference Result 860 states and 2485 transitions. [2021-06-05 22:07:27,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:07:27,965 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:27,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:27,966 INFO L225 Difference]: With dead ends: 860 [2021-06-05 22:07:27,966 INFO L226 Difference]: Without dead ends: 850 [2021-06-05 22:07:27,966 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 918.6ms TimeCoverageRelationStatistics Valid=355, Invalid=1205, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:07:27,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2021-06-05 22:07:27,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 351. [2021-06-05 22:07:27,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 3.0114285714285716) internal successors, (1054), 350 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:27,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1054 transitions. [2021-06-05 22:07:27,971 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1054 transitions. Word has length 22 [2021-06-05 22:07:27,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:27,971 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1054 transitions. [2021-06-05 22:07:27,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:27,971 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1054 transitions. [2021-06-05 22:07:27,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:27,971 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:27,971 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:28,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1535,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:28,173 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:28,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:28,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1899228176, now seen corresponding path program 143 times [2021-06-05 22:07:28,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:28,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657301413] [2021-06-05 22:07:28,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:28,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:28,238 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:28,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:28,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657301413] [2021-06-05 22:07:28,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657301413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:28,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037515216] [2021-06-05 22:07:28,238 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:28,310 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:07:28,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:28,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:28,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:28,490 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:28,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037515216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:28,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:28,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:07:28,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510111520] [2021-06-05 22:07:28,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:07:28,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:28,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:07:28,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:07:28,491 INFO L87 Difference]: Start difference. First operand 351 states and 1054 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:28,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:28,869 INFO L93 Difference]: Finished difference Result 710 states and 2069 transitions. [2021-06-05 22:07:28,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:07:28,869 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:28,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:28,870 INFO L225 Difference]: With dead ends: 710 [2021-06-05 22:07:28,870 INFO L226 Difference]: Without dead ends: 710 [2021-06-05 22:07:28,870 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 393.5ms TimeCoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:07:28,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2021-06-05 22:07:28,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 342. [2021-06-05 22:07:28,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 3.0175953079178885) internal successors, (1029), 341 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:28,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1029 transitions. [2021-06-05 22:07:28,875 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1029 transitions. Word has length 22 [2021-06-05 22:07:28,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:28,875 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1029 transitions. [2021-06-05 22:07:28,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:28,875 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1029 transitions. [2021-06-05 22:07:28,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:28,875 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:28,875 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:29,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1546 [2021-06-05 22:07:29,076 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:29,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:29,076 INFO L82 PathProgramCache]: Analyzing trace with hash 883719676, now seen corresponding path program 144 times [2021-06-05 22:07:29,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:29,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319163673] [2021-06-05 22:07:29,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:29,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:29,141 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:29,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:29,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319163673] [2021-06-05 22:07:29,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319163673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:29,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893854438] [2021-06-05 22:07:29,142 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:29,213 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:07:29,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:29,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:29,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:29,350 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:29,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893854438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:29,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:29,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:07:29,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399906359] [2021-06-05 22:07:29,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:07:29,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:29,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:07:29,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:07:29,351 INFO L87 Difference]: Start difference. First operand 342 states and 1029 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:29,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:29,718 INFO L93 Difference]: Finished difference Result 701 states and 2021 transitions. [2021-06-05 22:07:29,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:07:29,718 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:29,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:29,719 INFO L225 Difference]: With dead ends: 701 [2021-06-05 22:07:29,719 INFO L226 Difference]: Without dead ends: 692 [2021-06-05 22:07:29,719 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 342.8ms TimeCoverageRelationStatistics Valid=139, Invalid=367, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:07:29,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2021-06-05 22:07:29,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 348. [2021-06-05 22:07:29,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 3.0) internal successors, (1041), 347 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:29,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1041 transitions. [2021-06-05 22:07:29,723 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1041 transitions. Word has length 22 [2021-06-05 22:07:29,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:29,723 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1041 transitions. [2021-06-05 22:07:29,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:29,723 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1041 transitions. [2021-06-05 22:07:29,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:29,724 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:29,724 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:29,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1557,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:29,924 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:29,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:29,924 INFO L82 PathProgramCache]: Analyzing trace with hash 661159310, now seen corresponding path program 145 times [2021-06-05 22:07:29,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:29,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413442429] [2021-06-05 22:07:29,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:29,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:30,002 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:30,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:30,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413442429] [2021-06-05 22:07:30,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413442429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:30,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233609339] [2021-06-05 22:07:30,002 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:30,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:30,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:30,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:30,213 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:30,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233609339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:30,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:30,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 22:07:30,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660890748] [2021-06-05 22:07:30,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:07:30,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:30,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:07:30,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:07:30,214 INFO L87 Difference]: Start difference. First operand 348 states and 1041 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:31,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:31,101 INFO L93 Difference]: Finished difference Result 796 states and 2271 transitions. [2021-06-05 22:07:31,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:07:31,102 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:31,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:31,103 INFO L225 Difference]: With dead ends: 796 [2021-06-05 22:07:31,103 INFO L226 Difference]: Without dead ends: 786 [2021-06-05 22:07:31,103 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 801.1ms TimeCoverageRelationStatistics Valid=285, Invalid=905, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:07:31,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2021-06-05 22:07:31,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 370. [2021-06-05 22:07:31,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 2.994579945799458) internal successors, (1105), 369 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:31,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1105 transitions. [2021-06-05 22:07:31,107 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1105 transitions. Word has length 22 [2021-06-05 22:07:31,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:31,107 INFO L482 AbstractCegarLoop]: Abstraction has 370 states and 1105 transitions. [2021-06-05 22:07:31,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:31,108 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1105 transitions. [2021-06-05 22:07:31,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:31,108 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:31,108 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:31,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1570,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:31,308 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:31,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:31,309 INFO L82 PathProgramCache]: Analyzing trace with hash 479068998, now seen corresponding path program 146 times [2021-06-05 22:07:31,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:31,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113247264] [2021-06-05 22:07:31,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:31,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:31,370 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:31,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:31,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113247264] [2021-06-05 22:07:31,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113247264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:31,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445788001] [2021-06-05 22:07:31,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:31,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:07:31,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:31,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:31,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:31,601 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:31,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445788001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:31,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:31,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 22:07:31,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948797898] [2021-06-05 22:07:31,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:07:31,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:31,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:07:31,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:07:31,602 INFO L87 Difference]: Start difference. First operand 370 states and 1105 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:32,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:32,438 INFO L93 Difference]: Finished difference Result 786 states and 2232 transitions. [2021-06-05 22:07:32,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:07:32,439 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:32,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:32,440 INFO L225 Difference]: With dead ends: 786 [2021-06-05 22:07:32,440 INFO L226 Difference]: Without dead ends: 774 [2021-06-05 22:07:32,440 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 746.9ms TimeCoverageRelationStatistics Valid=279, Invalid=843, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:07:32,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2021-06-05 22:07:32,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 350. [2021-06-05 22:07:32,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 2.994269340974212) internal successors, (1045), 349 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:32,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1045 transitions. [2021-06-05 22:07:32,446 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1045 transitions. Word has length 22 [2021-06-05 22:07:32,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:32,446 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 1045 transitions. [2021-06-05 22:07:32,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:32,446 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1045 transitions. [2021-06-05 22:07:32,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:32,447 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:32,447 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:32,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1584 [2021-06-05 22:07:32,665 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:32,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:32,665 INFO L82 PathProgramCache]: Analyzing trace with hash 49736188, now seen corresponding path program 147 times [2021-06-05 22:07:32,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:32,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093014432] [2021-06-05 22:07:32,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:32,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:32,722 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:32,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:32,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093014432] [2021-06-05 22:07:32,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093014432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:32,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157645005] [2021-06-05 22:07:32,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:32,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:07:32,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:32,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:32,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:32,937 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:32,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157645005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:32,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:32,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:07:32,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576931713] [2021-06-05 22:07:32,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:07:32,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:32,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:07:32,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:07:32,938 INFO L87 Difference]: Start difference. First operand 350 states and 1045 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:33,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:33,367 INFO L93 Difference]: Finished difference Result 649 states and 1895 transitions. [2021-06-05 22:07:33,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:07:33,368 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:33,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:33,368 INFO L225 Difference]: With dead ends: 649 [2021-06-05 22:07:33,368 INFO L226 Difference]: Without dead ends: 629 [2021-06-05 22:07:33,368 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 412.8ms TimeCoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:07:33,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-06-05 22:07:33,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 356. [2021-06-05 22:07:33,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 2.980281690140845) internal successors, (1058), 355 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:33,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 1058 transitions. [2021-06-05 22:07:33,373 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 1058 transitions. Word has length 22 [2021-06-05 22:07:33,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:33,373 INFO L482 AbstractCegarLoop]: Abstraction has 356 states and 1058 transitions. [2021-06-05 22:07:33,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:33,373 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 1058 transitions. [2021-06-05 22:07:33,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:33,373 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:33,373 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:33,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1598 [2021-06-05 22:07:33,574 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:33,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:33,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1300096188, now seen corresponding path program 148 times [2021-06-05 22:07:33,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:33,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848562023] [2021-06-05 22:07:33,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:33,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:33,630 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:33,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:33,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848562023] [2021-06-05 22:07:33,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848562023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:33,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510107955] [2021-06-05 22:07:33,631 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:33,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:07:33,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:33,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:33,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:33,841 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:33,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510107955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:33,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:33,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 22:07:33,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889818637] [2021-06-05 22:07:33,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:07:33,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:33,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:07:33,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:07:33,842 INFO L87 Difference]: Start difference. First operand 356 states and 1058 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:34,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:34,421 INFO L93 Difference]: Finished difference Result 727 states and 2073 transitions. [2021-06-05 22:07:34,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:07:34,421 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:34,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:34,422 INFO L225 Difference]: With dead ends: 727 [2021-06-05 22:07:34,422 INFO L226 Difference]: Without dead ends: 717 [2021-06-05 22:07:34,422 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 528.1ms TimeCoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:07:34,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2021-06-05 22:07:34,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 378. [2021-06-05 22:07:34,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 2.976127320954907) internal successors, (1122), 377 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:34,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 1122 transitions. [2021-06-05 22:07:34,426 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 1122 transitions. Word has length 22 [2021-06-05 22:07:34,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:34,426 INFO L482 AbstractCegarLoop]: Abstraction has 378 states and 1122 transitions. [2021-06-05 22:07:34,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:34,426 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 1122 transitions. [2021-06-05 22:07:34,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:34,427 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:34,427 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:34,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1605 [2021-06-05 22:07:34,641 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:34,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:34,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1482186500, now seen corresponding path program 149 times [2021-06-05 22:07:34,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:34,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215550143] [2021-06-05 22:07:34,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:34,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:34,698 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:34,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:34,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215550143] [2021-06-05 22:07:34,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215550143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:34,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788736141] [2021-06-05 22:07:34,698 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:34,820 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:07:34,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:34,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:34,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:34,992 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:34,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788736141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:34,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:34,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 22:07:34,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124187292] [2021-06-05 22:07:34,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:07:34,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:34,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:07:34,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:07:34,992 INFO L87 Difference]: Start difference. First operand 378 states and 1122 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:35,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:35,462 INFO L93 Difference]: Finished difference Result 684 states and 1962 transitions. [2021-06-05 22:07:35,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:07:35,462 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:35,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:35,463 INFO L225 Difference]: With dead ends: 684 [2021-06-05 22:07:35,463 INFO L226 Difference]: Without dead ends: 669 [2021-06-05 22:07:35,463 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 453.4ms TimeCoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:07:35,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2021-06-05 22:07:35,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 352. [2021-06-05 22:07:35,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 2.988603988603989) internal successors, (1049), 351 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:35,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1049 transitions. [2021-06-05 22:07:35,467 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1049 transitions. Word has length 22 [2021-06-05 22:07:35,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:35,467 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 1049 transitions. [2021-06-05 22:07:35,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:35,467 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1049 transitions. [2021-06-05 22:07:35,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:35,468 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:35,468 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:35,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1615,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:35,668 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:35,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:35,669 INFO L82 PathProgramCache]: Analyzing trace with hash -400936498, now seen corresponding path program 150 times [2021-06-05 22:07:35,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:35,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904622412] [2021-06-05 22:07:35,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:35,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:35,729 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:35,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:35,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904622412] [2021-06-05 22:07:35,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904622412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:35,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581830385] [2021-06-05 22:07:35,730 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:35,803 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:07:35,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:35,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:35,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:35,953 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:35,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581830385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:35,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:35,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:07:35,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847600554] [2021-06-05 22:07:35,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:07:35,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:35,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:07:35,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:07:35,954 INFO L87 Difference]: Start difference. First operand 352 states and 1049 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:36,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:36,333 INFO L93 Difference]: Finished difference Result 665 states and 1917 transitions. [2021-06-05 22:07:36,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:07:36,334 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:36,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:36,335 INFO L225 Difference]: With dead ends: 665 [2021-06-05 22:07:36,335 INFO L226 Difference]: Without dead ends: 629 [2021-06-05 22:07:36,335 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 369.4ms TimeCoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:07:36,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-06-05 22:07:36,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 362. [2021-06-05 22:07:36,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.96398891966759) internal successors, (1070), 361 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:36,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 1070 transitions. [2021-06-05 22:07:36,339 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 1070 transitions. Word has length 22 [2021-06-05 22:07:36,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:36,339 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 1070 transitions. [2021-06-05 22:07:36,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:36,339 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 1070 transitions. [2021-06-05 22:07:36,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:36,340 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:36,340 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:36,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1627 [2021-06-05 22:07:36,540 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:36,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:36,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1124721900, now seen corresponding path program 151 times [2021-06-05 22:07:36,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:36,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730852413] [2021-06-05 22:07:36,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:36,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:36,592 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:36,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:36,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730852413] [2021-06-05 22:07:36,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730852413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:36,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654080241] [2021-06-05 22:07:36,593 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:36,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:36,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:36,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:36,810 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:36,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654080241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:36,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:36,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:07:36,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833253394] [2021-06-05 22:07:36,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:07:36,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:36,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:07:36,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:07:36,811 INFO L87 Difference]: Start difference. First operand 362 states and 1070 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:37,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:37,140 INFO L93 Difference]: Finished difference Result 609 states and 1767 transitions. [2021-06-05 22:07:37,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:07:37,140 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:37,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:37,141 INFO L225 Difference]: With dead ends: 609 [2021-06-05 22:07:37,141 INFO L226 Difference]: Without dead ends: 589 [2021-06-05 22:07:37,141 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 336.4ms TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:07:37,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-06-05 22:07:37,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 368. [2021-06-05 22:07:37,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 2.9509536784741144) internal successors, (1083), 367 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:37,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1083 transitions. [2021-06-05 22:07:37,145 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1083 transitions. Word has length 22 [2021-06-05 22:07:37,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:37,145 INFO L482 AbstractCegarLoop]: Abstraction has 368 states and 1083 transitions. [2021-06-05 22:07:37,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:37,145 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1083 transitions. [2021-06-05 22:07:37,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:37,146 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:37,146 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:37,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1637,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:37,346 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:37,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:37,346 INFO L82 PathProgramCache]: Analyzing trace with hash -225110476, now seen corresponding path program 152 times [2021-06-05 22:07:37,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:37,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504252528] [2021-06-05 22:07:37,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:37,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:37,401 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:37,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:37,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504252528] [2021-06-05 22:07:37,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504252528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:37,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796125092] [2021-06-05 22:07:37,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:37,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:07:37,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:37,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:37,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:37,622 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:37,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796125092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:37,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:37,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 22:07:37,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113495295] [2021-06-05 22:07:37,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:07:37,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:37,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:07:37,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:07:37,623 INFO L87 Difference]: Start difference. First operand 368 states and 1083 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:38,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:38,093 INFO L93 Difference]: Finished difference Result 687 states and 1945 transitions. [2021-06-05 22:07:38,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:07:38,094 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:38,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:38,094 INFO L225 Difference]: With dead ends: 687 [2021-06-05 22:07:38,094 INFO L226 Difference]: Without dead ends: 677 [2021-06-05 22:07:38,095 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 450.9ms TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:07:38,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2021-06-05 22:07:38,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 390. [2021-06-05 22:07:38,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.948586118251928) internal successors, (1147), 389 states have internal predecessors, (1147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:38,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1147 transitions. [2021-06-05 22:07:38,099 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1147 transitions. Word has length 22 [2021-06-05 22:07:38,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:38,099 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 1147 transitions. [2021-06-05 22:07:38,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:38,099 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1147 transitions. [2021-06-05 22:07:38,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:38,100 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:38,100 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:38,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1645,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:38,300 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:38,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:38,301 INFO L82 PathProgramCache]: Analyzing trace with hash -407200788, now seen corresponding path program 153 times [2021-06-05 22:07:38,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:38,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396848238] [2021-06-05 22:07:38,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:38,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:38,355 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:38,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:38,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396848238] [2021-06-05 22:07:38,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396848238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:38,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803559196] [2021-06-05 22:07:38,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:38,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:07:38,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:38,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:38,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:38,575 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:38,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803559196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:38,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:38,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 22:07:38,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16447783] [2021-06-05 22:07:38,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:07:38,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:38,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:07:38,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:07:38,576 INFO L87 Difference]: Start difference. First operand 390 states and 1147 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:38,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:38,906 INFO L93 Difference]: Finished difference Result 644 states and 1834 transitions. [2021-06-05 22:07:38,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:07:38,907 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:38,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:38,907 INFO L225 Difference]: With dead ends: 644 [2021-06-05 22:07:38,907 INFO L226 Difference]: Without dead ends: 624 [2021-06-05 22:07:38,908 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 342.6ms TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:07:38,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-06-05 22:07:38,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 355. [2021-06-05 22:07:38,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.977401129943503) internal successors, (1054), 354 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:38,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1054 transitions. [2021-06-05 22:07:38,912 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1054 transitions. Word has length 22 [2021-06-05 22:07:38,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:38,912 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 1054 transitions. [2021-06-05 22:07:38,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:38,912 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1054 transitions. [2021-06-05 22:07:38,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:38,912 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:38,912 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:39,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1655 [2021-06-05 22:07:39,113 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:39,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:39,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1187444538, now seen corresponding path program 154 times [2021-06-05 22:07:39,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:39,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204376795] [2021-06-05 22:07:39,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:39,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:39,186 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:39,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:39,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204376795] [2021-06-05 22:07:39,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204376795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:39,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57807305] [2021-06-05 22:07:39,186 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:39,283 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:07:39,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:39,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:39,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:39,423 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:39,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57807305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:39,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:39,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:07:39,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30953724] [2021-06-05 22:07:39,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:07:39,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:39,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:07:39,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:07:39,424 INFO L87 Difference]: Start difference. First operand 355 states and 1054 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:39,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:39,703 INFO L93 Difference]: Finished difference Result 643 states and 1857 transitions. [2021-06-05 22:07:39,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:07:39,704 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:39,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:39,704 INFO L225 Difference]: With dead ends: 643 [2021-06-05 22:07:39,705 INFO L226 Difference]: Without dead ends: 643 [2021-06-05 22:07:39,705 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 279.4ms TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:07:39,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-06-05 22:07:39,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 364. [2021-06-05 22:07:39,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 2.9669421487603307) internal successors, (1077), 363 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:39,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 1077 transitions. [2021-06-05 22:07:39,709 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 1077 transitions. Word has length 22 [2021-06-05 22:07:39,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:39,709 INFO L482 AbstractCegarLoop]: Abstraction has 364 states and 1077 transitions. [2021-06-05 22:07:39,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:39,709 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 1077 transitions. [2021-06-05 22:07:39,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:39,710 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:39,710 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:39,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1665,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:39,925 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:39,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:39,925 INFO L82 PathProgramCache]: Analyzing trace with hash 307158426, now seen corresponding path program 155 times [2021-06-05 22:07:39,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:39,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959693251] [2021-06-05 22:07:39,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:39,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:39,991 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:39,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:39,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959693251] [2021-06-05 22:07:39,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959693251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:39,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979764872] [2021-06-05 22:07:39,992 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:40,075 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:07:40,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:40,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:40,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:40,197 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:40,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979764872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:40,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:40,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:07:40,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251904312] [2021-06-05 22:07:40,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:07:40,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:40,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:07:40,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:07:40,198 INFO L87 Difference]: Start difference. First operand 364 states and 1077 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:40,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:40,713 INFO L93 Difference]: Finished difference Result 666 states and 1909 transitions. [2021-06-05 22:07:40,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:07:40,714 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:40,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:40,714 INFO L225 Difference]: With dead ends: 666 [2021-06-05 22:07:40,714 INFO L226 Difference]: Without dead ends: 656 [2021-06-05 22:07:40,715 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 446.9ms TimeCoverageRelationStatistics Valid=200, Invalid=670, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:07:40,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2021-06-05 22:07:40,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 361. [2021-06-05 22:07:40,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 2.9583333333333335) internal successors, (1065), 360 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:40,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 1065 transitions. [2021-06-05 22:07:40,719 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 1065 transitions. Word has length 22 [2021-06-05 22:07:40,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:40,719 INFO L482 AbstractCegarLoop]: Abstraction has 361 states and 1065 transitions. [2021-06-05 22:07:40,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:40,719 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 1065 transitions. [2021-06-05 22:07:40,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:40,719 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:40,719 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:40,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1671 [2021-06-05 22:07:40,920 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:40,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:40,920 INFO L82 PathProgramCache]: Analyzing trace with hash 732105636, now seen corresponding path program 156 times [2021-06-05 22:07:40,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:40,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967499354] [2021-06-05 22:07:40,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:40,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:40,974 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:40,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:40,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967499354] [2021-06-05 22:07:40,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967499354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:40,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914733314] [2021-06-05 22:07:40,974 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:41,049 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:07:41,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:41,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:41,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:41,166 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:41,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914733314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:41,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:41,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:07:41,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85108272] [2021-06-05 22:07:41,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:07:41,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:41,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:07:41,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:07:41,167 INFO L87 Difference]: Start difference. First operand 361 states and 1065 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:41,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:41,496 INFO L93 Difference]: Finished difference Result 652 states and 1887 transitions. [2021-06-05 22:07:41,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:07:41,496 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:41,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:41,497 INFO L225 Difference]: With dead ends: 652 [2021-06-05 22:07:41,497 INFO L226 Difference]: Without dead ends: 632 [2021-06-05 22:07:41,497 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 302.9ms TimeCoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:07:41,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-06-05 22:07:41,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 358. [2021-06-05 22:07:41,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 2.9495798319327733) internal successors, (1053), 357 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:41,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 1053 transitions. [2021-06-05 22:07:41,501 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 1053 transitions. Word has length 22 [2021-06-05 22:07:41,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:41,501 INFO L482 AbstractCegarLoop]: Abstraction has 358 states and 1053 transitions. [2021-06-05 22:07:41,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:41,501 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 1053 transitions. [2021-06-05 22:07:41,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:41,501 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:41,501 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:41,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1676 [2021-06-05 22:07:41,702 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:41,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:41,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1791265100, now seen corresponding path program 157 times [2021-06-05 22:07:41,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:41,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148035947] [2021-06-05 22:07:41,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:41,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:41,760 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:41,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:41,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148035947] [2021-06-05 22:07:41,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148035947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:41,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446186765] [2021-06-05 22:07:41,760 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:41,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:41,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:41,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:42,002 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:42,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446186765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:42,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:42,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:07:42,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057536611] [2021-06-05 22:07:42,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:07:42,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:42,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:07:42,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:07:42,003 INFO L87 Difference]: Start difference. First operand 358 states and 1053 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:42,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:42,300 INFO L93 Difference]: Finished difference Result 580 states and 1679 transitions. [2021-06-05 22:07:42,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:07:42,300 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:42,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:42,301 INFO L225 Difference]: With dead ends: 580 [2021-06-05 22:07:42,301 INFO L226 Difference]: Without dead ends: 544 [2021-06-05 22:07:42,301 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 268.2ms TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:07:42,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-06-05 22:07:42,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 332. [2021-06-05 22:07:42,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.9486404833836857) internal successors, (976), 331 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:42,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 976 transitions. [2021-06-05 22:07:42,306 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 976 transitions. Word has length 22 [2021-06-05 22:07:42,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:42,306 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 976 transitions. [2021-06-05 22:07:42,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:42,306 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 976 transitions. [2021-06-05 22:07:42,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:42,307 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:42,307 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:42,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1680,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:42,529 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:42,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:42,530 INFO L82 PathProgramCache]: Analyzing trace with hash 833708592, now seen corresponding path program 158 times [2021-06-05 22:07:42,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:42,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467961161] [2021-06-05 22:07:42,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:42,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:42,591 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:42,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:42,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467961161] [2021-06-05 22:07:42,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467961161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:42,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398696366] [2021-06-05 22:07:42,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:42,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:07:42,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:42,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:42,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:42,785 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:42,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398696366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:42,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:42,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:07:42,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437494685] [2021-06-05 22:07:42,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:07:42,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:42,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:07:42,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:07:42,786 INFO L87 Difference]: Start difference. First operand 332 states and 976 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:42,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:42,992 INFO L93 Difference]: Finished difference Result 529 states and 1547 transitions. [2021-06-05 22:07:42,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:07:42,993 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:42,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:42,993 INFO L225 Difference]: With dead ends: 529 [2021-06-05 22:07:42,993 INFO L226 Difference]: Without dead ends: 529 [2021-06-05 22:07:42,994 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 174.8ms TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:07:42,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-06-05 22:07:42,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 341. [2021-06-05 22:07:42,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.9676470588235295) internal successors, (1009), 340 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:42,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1009 transitions. [2021-06-05 22:07:42,997 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1009 transitions. Word has length 22 [2021-06-05 22:07:42,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:42,998 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1009 transitions. [2021-06-05 22:07:42,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:42,998 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1009 transitions. [2021-06-05 22:07:42,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:42,998 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:42,998 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:43,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1684 [2021-06-05 22:07:43,200 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:43,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:43,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1966655740, now seen corresponding path program 159 times [2021-06-05 22:07:43,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:43,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745330925] [2021-06-05 22:07:43,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:43,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:43,257 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:43,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:43,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745330925] [2021-06-05 22:07:43,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745330925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:43,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424964277] [2021-06-05 22:07:43,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:43,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:07:43,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:43,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:43,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:43,449 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:43,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424964277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:43,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:43,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:07:43,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033948677] [2021-06-05 22:07:43,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:07:43,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:43,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:07:43,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:07:43,450 INFO L87 Difference]: Start difference. First operand 341 states and 1009 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:43,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:43,713 INFO L93 Difference]: Finished difference Result 560 states and 1626 transitions. [2021-06-05 22:07:43,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:07:43,713 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:43,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:43,714 INFO L225 Difference]: With dead ends: 560 [2021-06-05 22:07:43,714 INFO L226 Difference]: Without dead ends: 550 [2021-06-05 22:07:43,714 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 246.7ms TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:07:43,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-06-05 22:07:43,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 338. [2021-06-05 22:07:43,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.9584569732937687) internal successors, (997), 337 states have internal predecessors, (997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:43,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 997 transitions. [2021-06-05 22:07:43,718 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 997 transitions. Word has length 22 [2021-06-05 22:07:43,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:43,718 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 997 transitions. [2021-06-05 22:07:43,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:43,718 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 997 transitions. [2021-06-05 22:07:43,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:43,718 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:43,718 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:43,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1689 [2021-06-05 22:07:43,919 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:43,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:43,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1541708530, now seen corresponding path program 160 times [2021-06-05 22:07:43,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:43,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065614824] [2021-06-05 22:07:43,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:43,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:43,973 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:43,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:43,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065614824] [2021-06-05 22:07:43,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065614824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:43,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879259403] [2021-06-05 22:07:43,973 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:44,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:07:44,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:44,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:44,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:44,167 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:44,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879259403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:44,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:44,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:07:44,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851009030] [2021-06-05 22:07:44,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:07:44,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:44,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:07:44,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:07:44,168 INFO L87 Difference]: Start difference. First operand 338 states and 997 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:44,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:44,418 INFO L93 Difference]: Finished difference Result 511 states and 1498 transitions. [2021-06-05 22:07:44,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:07:44,419 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:44,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:44,419 INFO L225 Difference]: With dead ends: 511 [2021-06-05 22:07:44,419 INFO L226 Difference]: Without dead ends: 491 [2021-06-05 22:07:44,419 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 208.0ms TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:07:44,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-06-05 22:07:44,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 335. [2021-06-05 22:07:44,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 2.9491017964071857) internal successors, (985), 334 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:44,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 985 transitions. [2021-06-05 22:07:44,423 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 985 transitions. Word has length 22 [2021-06-05 22:07:44,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:44,423 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 985 transitions. [2021-06-05 22:07:44,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:44,423 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 985 transitions. [2021-06-05 22:07:44,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:44,423 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:44,423 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:44,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1695,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:44,624 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:44,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:44,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1380787108, now seen corresponding path program 161 times [2021-06-05 22:07:44,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:44,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848237560] [2021-06-05 22:07:44,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:44,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:44,686 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:44,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:44,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848237560] [2021-06-05 22:07:44,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848237560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:44,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149320055] [2021-06-05 22:07:44,686 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:44,763 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:07:44,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:44,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:44,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:44,908 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:44,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149320055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:44,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:44,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:07:44,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403659195] [2021-06-05 22:07:44,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:07:44,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:44,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:07:44,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:07:44,909 INFO L87 Difference]: Start difference. First operand 335 states and 985 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:45,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:45,174 INFO L93 Difference]: Finished difference Result 621 states and 1797 transitions. [2021-06-05 22:07:45,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:07:45,174 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:45,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:45,175 INFO L225 Difference]: With dead ends: 621 [2021-06-05 22:07:45,175 INFO L226 Difference]: Without dead ends: 621 [2021-06-05 22:07:45,175 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 221.6ms TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:07:45,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-06-05 22:07:45,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 347. [2021-06-05 22:07:45,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.985549132947977) internal successors, (1033), 346 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:45,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1033 transitions. [2021-06-05 22:07:45,179 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1033 transitions. Word has length 22 [2021-06-05 22:07:45,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:45,179 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1033 transitions. [2021-06-05 22:07:45,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:45,179 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1033 transitions. [2021-06-05 22:07:45,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:45,179 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:45,179 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:45,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1698 [2021-06-05 22:07:45,381 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:45,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:45,381 INFO L82 PathProgramCache]: Analyzing trace with hash 113815856, now seen corresponding path program 162 times [2021-06-05 22:07:45,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:45,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584727222] [2021-06-05 22:07:45,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:45,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:45,441 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:45,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:45,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584727222] [2021-06-05 22:07:45,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584727222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:45,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590432784] [2021-06-05 22:07:45,442 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:45,519 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:07:45,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:45,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:45,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:45,627 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:45,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590432784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:45,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:45,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:07:45,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203942084] [2021-06-05 22:07:45,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:07:45,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:45,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:07:45,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:07:45,628 INFO L87 Difference]: Start difference. First operand 347 states and 1033 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:45,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:45,963 INFO L93 Difference]: Finished difference Result 584 states and 1702 transitions. [2021-06-05 22:07:45,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:07:45,963 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:45,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:45,964 INFO L225 Difference]: With dead ends: 584 [2021-06-05 22:07:45,964 INFO L226 Difference]: Without dead ends: 574 [2021-06-05 22:07:45,964 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 264.0ms TimeCoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:07:45,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-06-05 22:07:45,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 354. [2021-06-05 22:07:45,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.9660056657223794) internal successors, (1047), 353 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:45,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1047 transitions. [2021-06-05 22:07:45,969 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1047 transitions. Word has length 22 [2021-06-05 22:07:45,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:45,969 INFO L482 AbstractCegarLoop]: Abstraction has 354 states and 1047 transitions. [2021-06-05 22:07:45,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:45,969 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1047 transitions. [2021-06-05 22:07:45,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:45,970 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:45,970 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:46,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1704 [2021-06-05 22:07:46,179 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:46,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:46,180 INFO L82 PathProgramCache]: Analyzing trace with hash -205296464, now seen corresponding path program 163 times [2021-06-05 22:07:46,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:46,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295099747] [2021-06-05 22:07:46,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:46,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:46,242 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:46,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:46,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295099747] [2021-06-05 22:07:46,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295099747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:46,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413929372] [2021-06-05 22:07:46,243 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:46,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:46,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:46,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:46,425 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:46,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413929372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:46,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:46,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 22:07:46,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925618248] [2021-06-05 22:07:46,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:07:46,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:46,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:07:46,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:07:46,426 INFO L87 Difference]: Start difference. First operand 354 states and 1047 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:46,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:46,593 INFO L93 Difference]: Finished difference Result 488 states and 1444 transitions. [2021-06-05 22:07:46,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:07:46,593 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:46,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:46,594 INFO L225 Difference]: With dead ends: 488 [2021-06-05 22:07:46,594 INFO L226 Difference]: Without dead ends: 488 [2021-06-05 22:07:46,594 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 168.1ms TimeCoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:07:46,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-06-05 22:07:46,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 326. [2021-06-05 22:07:46,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.9476923076923076) internal successors, (958), 325 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:46,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 958 transitions. [2021-06-05 22:07:46,597 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 958 transitions. Word has length 22 [2021-06-05 22:07:46,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:46,598 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 958 transitions. [2021-06-05 22:07:46,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:46,598 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 958 transitions. [2021-06-05 22:07:46,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:46,598 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:46,598 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:46,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1709 [2021-06-05 22:07:46,799 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:46,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:46,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1399002178, now seen corresponding path program 164 times [2021-06-05 22:07:46,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:46,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107425276] [2021-06-05 22:07:46,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:46,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:46,865 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:46,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:46,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107425276] [2021-06-05 22:07:46,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107425276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:46,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669591411] [2021-06-05 22:07:46,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:46,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:07:46,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:46,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:46,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:47,085 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:47,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669591411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:47,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:47,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:07:47,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737649575] [2021-06-05 22:07:47,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:07:47,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:47,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:07:47,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:07:47,086 INFO L87 Difference]: Start difference. First operand 326 states and 958 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:47,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:47,327 INFO L93 Difference]: Finished difference Result 508 states and 1483 transitions. [2021-06-05 22:07:47,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:07:47,327 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:47,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:47,328 INFO L225 Difference]: With dead ends: 508 [2021-06-05 22:07:47,328 INFO L226 Difference]: Without dead ends: 508 [2021-06-05 22:07:47,328 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 247.5ms TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:07:47,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-06-05 22:07:47,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 336. [2021-06-05 22:07:47,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.97910447761194) internal successors, (998), 335 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:47,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 998 transitions. [2021-06-05 22:07:47,332 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 998 transitions. Word has length 22 [2021-06-05 22:07:47,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:47,332 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 998 transitions. [2021-06-05 22:07:47,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:47,332 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 998 transitions. [2021-06-05 22:07:47,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:47,332 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:47,332 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:47,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1712,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:47,533 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:47,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:47,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1401362154, now seen corresponding path program 165 times [2021-06-05 22:07:47,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:47,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639080163] [2021-06-05 22:07:47,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:47,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:47,602 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:47,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:47,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639080163] [2021-06-05 22:07:47,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639080163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:47,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683716720] [2021-06-05 22:07:47,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:47,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:07:47,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:47,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:47,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:47,820 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:47,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683716720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:47,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:47,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:07:47,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881334654] [2021-06-05 22:07:47,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:07:47,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:47,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:07:47,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:07:47,821 INFO L87 Difference]: Start difference. First operand 336 states and 998 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:48,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:48,158 INFO L93 Difference]: Finished difference Result 539 states and 1562 transitions. [2021-06-05 22:07:48,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:07:48,158 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:48,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:48,159 INFO L225 Difference]: With dead ends: 539 [2021-06-05 22:07:48,159 INFO L226 Difference]: Without dead ends: 529 [2021-06-05 22:07:48,159 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 316.9ms TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:07:48,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-06-05 22:07:48,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 333. [2021-06-05 22:07:48,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.9698795180722892) internal successors, (986), 332 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:48,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 986 transitions. [2021-06-05 22:07:48,163 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 986 transitions. Word has length 22 [2021-06-05 22:07:48,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:48,163 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 986 transitions. [2021-06-05 22:07:48,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:48,163 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 986 transitions. [2021-06-05 22:07:48,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:48,163 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:48,163 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:48,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1721 [2021-06-05 22:07:48,364 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:48,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:48,364 INFO L82 PathProgramCache]: Analyzing trace with hash -976414944, now seen corresponding path program 166 times [2021-06-05 22:07:48,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:48,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981119216] [2021-06-05 22:07:48,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:48,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:48,447 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:48,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:48,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981119216] [2021-06-05 22:07:48,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981119216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:48,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391414715] [2021-06-05 22:07:48,447 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:48,530 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:07:48,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:48,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:48,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:48,739 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:48,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391414715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:48,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:48,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:07:48,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530699566] [2021-06-05 22:07:48,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:07:48,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:48,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:07:48,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:07:48,740 INFO L87 Difference]: Start difference. First operand 333 states and 986 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:49,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:49,070 INFO L93 Difference]: Finished difference Result 500 states and 1460 transitions. [2021-06-05 22:07:49,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:07:49,070 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:49,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:49,071 INFO L225 Difference]: With dead ends: 500 [2021-06-05 22:07:49,071 INFO L226 Difference]: Without dead ends: 480 [2021-06-05 22:07:49,071 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 357.4ms TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:07:49,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-06-05 22:07:49,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 330. [2021-06-05 22:07:49,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.9604863221884496) internal successors, (974), 329 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:49,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 974 transitions. [2021-06-05 22:07:49,075 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 974 transitions. Word has length 22 [2021-06-05 22:07:49,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:49,075 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 974 transitions. [2021-06-05 22:07:49,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:49,075 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 974 transitions. [2021-06-05 22:07:49,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:49,075 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:49,075 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:49,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1730,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:49,276 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:49,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:49,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1791095814, now seen corresponding path program 167 times [2021-06-05 22:07:49,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:49,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746736358] [2021-06-05 22:07:49,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:49,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:49,341 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:49,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:49,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746736358] [2021-06-05 22:07:49,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746736358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:49,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313980984] [2021-06-05 22:07:49,341 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:49,420 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:07:49,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:49,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:49,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:49,590 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:49,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313980984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:49,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:49,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:07:49,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407745172] [2021-06-05 22:07:49,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:07:49,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:49,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:07:49,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:07:49,590 INFO L87 Difference]: Start difference. First operand 330 states and 974 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:49,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:49,921 INFO L93 Difference]: Finished difference Result 626 states and 1819 transitions. [2021-06-05 22:07:49,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:07:49,921 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:49,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:49,922 INFO L225 Difference]: With dead ends: 626 [2021-06-05 22:07:49,922 INFO L226 Difference]: Without dead ends: 626 [2021-06-05 22:07:49,922 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 332.9ms TimeCoverageRelationStatistics Valid=142, Invalid=364, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:07:49,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2021-06-05 22:07:49,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 340. [2021-06-05 22:07:49,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.0117994100294987) internal successors, (1021), 339 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:49,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1021 transitions. [2021-06-05 22:07:49,926 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1021 transitions. Word has length 22 [2021-06-05 22:07:49,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:49,926 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1021 transitions. [2021-06-05 22:07:49,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:49,926 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1021 transitions. [2021-06-05 22:07:49,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:49,926 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:49,926 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:50,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1739,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:50,127 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:50,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:50,127 INFO L82 PathProgramCache]: Analyzing trace with hash -296492850, now seen corresponding path program 168 times [2021-06-05 22:07:50,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:50,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73057460] [2021-06-05 22:07:50,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:50,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:50,201 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:50,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:50,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73057460] [2021-06-05 22:07:50,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73057460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:50,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404247856] [2021-06-05 22:07:50,201 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:50,308 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:07:50,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:50,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:50,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:50,466 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:50,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404247856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:50,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:50,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:07:50,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343284174] [2021-06-05 22:07:50,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:07:50,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:50,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:07:50,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:07:50,467 INFO L87 Difference]: Start difference. First operand 340 states and 1021 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:50,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:50,894 INFO L93 Difference]: Finished difference Result 668 states and 1921 transitions. [2021-06-05 22:07:50,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:07:50,895 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:50,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:50,896 INFO L225 Difference]: With dead ends: 668 [2021-06-05 22:07:50,896 INFO L226 Difference]: Without dead ends: 658 [2021-06-05 22:07:50,896 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 413.9ms TimeCoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:07:50,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2021-06-05 22:07:50,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 347. [2021-06-05 22:07:50,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.991329479768786) internal successors, (1035), 346 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:50,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1035 transitions. [2021-06-05 22:07:50,900 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1035 transitions. Word has length 22 [2021-06-05 22:07:50,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:50,900 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1035 transitions. [2021-06-05 22:07:50,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:50,900 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1035 transitions. [2021-06-05 22:07:50,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:50,900 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:50,900 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:51,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1750 [2021-06-05 22:07:51,101 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:51,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:51,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1154039106, now seen corresponding path program 169 times [2021-06-05 22:07:51,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:51,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474763197] [2021-06-05 22:07:51,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:51,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:51,166 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:51,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:51,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474763197] [2021-06-05 22:07:51,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474763197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:51,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721969133] [2021-06-05 22:07:51,167 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:51,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:51,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:51,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:51,403 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:51,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721969133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:51,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:51,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:07:51,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57742645] [2021-06-05 22:07:51,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:07:51,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:51,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:07:51,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:07:51,404 INFO L87 Difference]: Start difference. First operand 347 states and 1035 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:51,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:51,600 INFO L93 Difference]: Finished difference Result 559 states and 1628 transitions. [2021-06-05 22:07:51,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:07:51,600 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:51,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:51,601 INFO L225 Difference]: With dead ends: 559 [2021-06-05 22:07:51,601 INFO L226 Difference]: Without dead ends: 559 [2021-06-05 22:07:51,601 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 238.3ms TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:07:51,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-06-05 22:07:51,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 338. [2021-06-05 22:07:51,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.9970326409495547) internal successors, (1010), 337 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:51,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1010 transitions. [2021-06-05 22:07:51,605 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1010 transitions. Word has length 22 [2021-06-05 22:07:51,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:51,605 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1010 transitions. [2021-06-05 22:07:51,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:51,605 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1010 transitions. [2021-06-05 22:07:51,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:51,606 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:51,606 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:51,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1761 [2021-06-05 22:07:51,806 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:51,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:51,806 INFO L82 PathProgramCache]: Analyzing trace with hash -357980338, now seen corresponding path program 170 times [2021-06-05 22:07:51,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:51,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072265041] [2021-06-05 22:07:51,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:51,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:51,882 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:51,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:51,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072265041] [2021-06-05 22:07:51,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072265041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:51,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979881490] [2021-06-05 22:07:51,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:51,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:07:51,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:51,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:51,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:52,093 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:52,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979881490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:52,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:52,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:07:52,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125942387] [2021-06-05 22:07:52,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:07:52,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:52,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:07:52,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:07:52,094 INFO L87 Difference]: Start difference. First operand 338 states and 1010 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:52,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:52,352 INFO L93 Difference]: Finished difference Result 550 states and 1580 transitions. [2021-06-05 22:07:52,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:07:52,354 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:52,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:52,354 INFO L225 Difference]: With dead ends: 550 [2021-06-05 22:07:52,354 INFO L226 Difference]: Without dead ends: 541 [2021-06-05 22:07:52,355 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 223.9ms TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:07:52,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-06-05 22:07:52,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 344. [2021-06-05 22:07:52,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 2.979591836734694) internal successors, (1022), 343 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:52,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1022 transitions. [2021-06-05 22:07:52,358 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1022 transitions. Word has length 22 [2021-06-05 22:07:52,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:52,358 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1022 transitions. [2021-06-05 22:07:52,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:52,358 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1022 transitions. [2021-06-05 22:07:52,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:52,359 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:52,359 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:52,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1773,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:52,559 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:52,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:52,560 INFO L82 PathProgramCache]: Analyzing trace with hash -580540704, now seen corresponding path program 171 times [2021-06-05 22:07:52,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:52,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851262761] [2021-06-05 22:07:52,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:52,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:52,621 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:52,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:52,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851262761] [2021-06-05 22:07:52,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851262761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:52,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37514563] [2021-06-05 22:07:52,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:52,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:07:52,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:52,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:52,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:52,836 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:52,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37514563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:52,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:52,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 22:07:52,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861626990] [2021-06-05 22:07:52,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:07:52,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:52,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:07:52,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:07:52,837 INFO L87 Difference]: Start difference. First operand 344 states and 1022 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:53,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:53,246 INFO L93 Difference]: Finished difference Result 617 states and 1746 transitions. [2021-06-05 22:07:53,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:07:53,246 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:53,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:53,247 INFO L225 Difference]: With dead ends: 617 [2021-06-05 22:07:53,247 INFO L226 Difference]: Without dead ends: 607 [2021-06-05 22:07:53,247 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 364.4ms TimeCoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:07:53,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-06-05 22:07:53,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 366. [2021-06-05 22:07:53,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.9753424657534246) internal successors, (1086), 365 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:53,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1086 transitions. [2021-06-05 22:07:53,251 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1086 transitions. Word has length 22 [2021-06-05 22:07:53,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:53,251 INFO L482 AbstractCegarLoop]: Abstraction has 366 states and 1086 transitions. [2021-06-05 22:07:53,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:53,251 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1086 transitions. [2021-06-05 22:07:53,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:53,252 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:53,252 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:53,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1783 [2021-06-05 22:07:53,452 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:53,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:53,453 INFO L82 PathProgramCache]: Analyzing trace with hash -762631016, now seen corresponding path program 172 times [2021-06-05 22:07:53,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:53,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898884318] [2021-06-05 22:07:53,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:53,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:53,514 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:53,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:53,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898884318] [2021-06-05 22:07:53,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898884318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:53,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772535900] [2021-06-05 22:07:53,515 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:53,594 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:07:53,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:53,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:53,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:53,724 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:53,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772535900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:53,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:53,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 22:07:53,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438112632] [2021-06-05 22:07:53,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:07:53,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:53,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:07:53,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:07:53,725 INFO L87 Difference]: Start difference. First operand 366 states and 1086 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:54,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:54,071 INFO L93 Difference]: Finished difference Result 607 states and 1707 transitions. [2021-06-05 22:07:54,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:07:54,072 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:54,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:54,073 INFO L225 Difference]: With dead ends: 607 [2021-06-05 22:07:54,073 INFO L226 Difference]: Without dead ends: 595 [2021-06-05 22:07:54,073 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 329.8ms TimeCoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:07:54,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-06-05 22:07:54,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 346. [2021-06-05 22:07:54,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 2.973913043478261) internal successors, (1026), 345 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:54,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1026 transitions. [2021-06-05 22:07:54,077 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1026 transitions. Word has length 22 [2021-06-05 22:07:54,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:54,077 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 1026 transitions. [2021-06-05 22:07:54,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:54,077 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1026 transitions. [2021-06-05 22:07:54,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:54,077 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:54,077 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:54,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1795 [2021-06-05 22:07:54,278 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:54,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:54,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1191963826, now seen corresponding path program 173 times [2021-06-05 22:07:54,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:54,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764470624] [2021-06-05 22:07:54,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:54,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:54,343 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:54,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:54,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764470624] [2021-06-05 22:07:54,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764470624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:54,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14162190] [2021-06-05 22:07:54,344 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:54,447 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:07:54,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:54,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:54,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:54,580 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:54,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14162190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:54,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:54,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:07:54,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478090076] [2021-06-05 22:07:54,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:07:54,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:54,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:07:54,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:07:54,581 INFO L87 Difference]: Start difference. First operand 346 states and 1026 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:54,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:54,950 INFO L93 Difference]: Finished difference Result 475 states and 1390 transitions. [2021-06-05 22:07:54,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:07:54,950 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:54,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:54,951 INFO L225 Difference]: With dead ends: 475 [2021-06-05 22:07:54,951 INFO L226 Difference]: Without dead ends: 455 [2021-06-05 22:07:54,951 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 344.3ms TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:07:54,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-06-05 22:07:54,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 352. [2021-06-05 22:07:54,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 2.96011396011396) internal successors, (1039), 351 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:54,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1039 transitions. [2021-06-05 22:07:54,955 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1039 transitions. Word has length 22 [2021-06-05 22:07:54,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:54,955 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 1039 transitions. [2021-06-05 22:07:54,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:54,955 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1039 transitions. [2021-06-05 22:07:54,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:54,955 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:54,955 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:55,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1808 [2021-06-05 22:07:55,157 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:55,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:55,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1753171094, now seen corresponding path program 174 times [2021-06-05 22:07:55,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:55,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751530047] [2021-06-05 22:07:55,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:55,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:55,218 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:55,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:55,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751530047] [2021-06-05 22:07:55,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751530047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:55,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104078442] [2021-06-05 22:07:55,218 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:55,299 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:07:55,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:55,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:55,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:55,463 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:55,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104078442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:55,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:55,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 22:07:55,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087118285] [2021-06-05 22:07:55,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:07:55,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:55,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:07:55,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:07:55,464 INFO L87 Difference]: Start difference. First operand 352 states and 1039 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:55,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:55,871 INFO L93 Difference]: Finished difference Result 553 states and 1568 transitions. [2021-06-05 22:07:55,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:07:55,871 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:55,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:55,872 INFO L225 Difference]: With dead ends: 553 [2021-06-05 22:07:55,872 INFO L226 Difference]: Without dead ends: 543 [2021-06-05 22:07:55,872 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 373.4ms TimeCoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:07:55,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-06-05 22:07:55,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 374. [2021-06-05 22:07:55,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 373 states have (on average 2.9571045576407506) internal successors, (1103), 373 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:55,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 1103 transitions. [2021-06-05 22:07:55,876 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 1103 transitions. Word has length 22 [2021-06-05 22:07:55,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:55,876 INFO L482 AbstractCegarLoop]: Abstraction has 374 states and 1103 transitions. [2021-06-05 22:07:55,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:55,876 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 1103 transitions. [2021-06-05 22:07:55,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:55,876 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:55,877 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:56,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1816,176 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:56,077 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:56,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:56,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1571080782, now seen corresponding path program 175 times [2021-06-05 22:07:56,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:56,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550649232] [2021-06-05 22:07:56,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:56,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:56,146 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:56,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:56,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550649232] [2021-06-05 22:07:56,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550649232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:56,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106587871] [2021-06-05 22:07:56,148 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:56,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:56,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:56,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:56,454 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:56,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106587871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:56,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:56,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 22:07:56,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370806796] [2021-06-05 22:07:56,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:07:56,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:56,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:07:56,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:07:56,456 INFO L87 Difference]: Start difference. First operand 374 states and 1103 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:56,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:56,730 INFO L93 Difference]: Finished difference Result 510 states and 1457 transitions. [2021-06-05 22:07:56,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:07:56,730 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:56,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:56,731 INFO L225 Difference]: With dead ends: 510 [2021-06-05 22:07:56,731 INFO L226 Difference]: Without dead ends: 495 [2021-06-05 22:07:56,731 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 315.8ms TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:07:56,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-06-05 22:07:56,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 348. [2021-06-05 22:07:56,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.968299711815562) internal successors, (1030), 347 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:56,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1030 transitions. [2021-06-05 22:07:56,736 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1030 transitions. Word has length 22 [2021-06-05 22:07:56,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:56,736 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1030 transitions. [2021-06-05 22:07:56,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:56,737 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1030 transitions. [2021-06-05 22:07:56,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:56,737 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:56,737 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:56,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1827,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:56,940 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:56,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:56,940 INFO L82 PathProgramCache]: Analyzing trace with hash 861509322, now seen corresponding path program 176 times [2021-06-05 22:07:56,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:56,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195546677] [2021-06-05 22:07:56,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:56,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:57,005 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:57,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:57,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195546677] [2021-06-05 22:07:57,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195546677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:57,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125993147] [2021-06-05 22:07:57,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:57,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:07:57,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:57,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:57,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:57,219 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:57,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125993147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:57,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:57,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:07:57,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519681493] [2021-06-05 22:07:57,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:07:57,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:57,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:07:57,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:07:57,220 INFO L87 Difference]: Start difference. First operand 348 states and 1030 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:57,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:57,416 INFO L93 Difference]: Finished difference Result 491 states and 1418 transitions. [2021-06-05 22:07:57,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:07:57,416 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:57,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:57,417 INFO L225 Difference]: With dead ends: 491 [2021-06-05 22:07:57,417 INFO L226 Difference]: Without dead ends: 491 [2021-06-05 22:07:57,417 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 193.9ms TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:07:57,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-06-05 22:07:57,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 351. [2021-06-05 22:07:57,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 2.954285714285714) internal successors, (1034), 350 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:57,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1034 transitions. [2021-06-05 22:07:57,421 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1034 transitions. Word has length 22 [2021-06-05 22:07:57,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:57,421 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1034 transitions. [2021-06-05 22:07:57,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:57,421 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1034 transitions. [2021-06-05 22:07:57,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:57,421 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:57,421 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:57,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1838,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:57,622 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:57,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:57,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1938855010, now seen corresponding path program 177 times [2021-06-05 22:07:57,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:57,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499112269] [2021-06-05 22:07:57,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:57,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:57,684 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:57,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:57,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499112269] [2021-06-05 22:07:57,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499112269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:57,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802233240] [2021-06-05 22:07:57,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:57,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:07:57,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:57,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:57,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:57,887 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:57,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802233240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:57,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:57,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:07:57,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859220729] [2021-06-05 22:07:57,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:07:57,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:57,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:07:57,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:07:57,887 INFO L87 Difference]: Start difference. First operand 351 states and 1034 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:58,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:58,167 INFO L93 Difference]: Finished difference Result 522 states and 1494 transitions. [2021-06-05 22:07:58,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:07:58,168 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:58,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:58,168 INFO L225 Difference]: With dead ends: 522 [2021-06-05 22:07:58,168 INFO L226 Difference]: Without dead ends: 512 [2021-06-05 22:07:58,169 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 258.5ms TimeCoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:07:58,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-06-05 22:07:58,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 348. [2021-06-05 22:07:58,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.9452449567723344) internal successors, (1022), 347 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:58,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1022 transitions. [2021-06-05 22:07:58,172 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1022 transitions. Word has length 22 [2021-06-05 22:07:58,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:58,172 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1022 transitions. [2021-06-05 22:07:58,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:58,172 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1022 transitions. [2021-06-05 22:07:58,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:58,173 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:58,173 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:58,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1843,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:58,373 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:58,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:58,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1513907800, now seen corresponding path program 178 times [2021-06-05 22:07:58,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:58,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739225081] [2021-06-05 22:07:58,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:58,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:58,432 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:58,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:58,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739225081] [2021-06-05 22:07:58,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739225081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:58,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138494896] [2021-06-05 22:07:58,433 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:58,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:07:58,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:58,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:58,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:58,639 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:58,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138494896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:58,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:58,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:07:58,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448936913] [2021-06-05 22:07:58,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:07:58,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:58,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:07:58,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:07:58,640 INFO L87 Difference]: Start difference. First operand 348 states and 1022 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:58,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:58,897 INFO L93 Difference]: Finished difference Result 473 states and 1378 transitions. [2021-06-05 22:07:58,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:07:58,897 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:58,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:58,898 INFO L225 Difference]: With dead ends: 473 [2021-06-05 22:07:58,898 INFO L226 Difference]: Without dead ends: 453 [2021-06-05 22:07:58,898 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 217.1ms TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:07:58,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-06-05 22:07:58,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 330. [2021-06-05 22:07:58,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.9483282674772036) internal successors, (970), 329 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:58,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 970 transitions. [2021-06-05 22:07:58,901 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 970 transitions. Word has length 22 [2021-06-05 22:07:58,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:58,902 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 970 transitions. [2021-06-05 22:07:58,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:58,902 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 970 transitions. [2021-06-05 22:07:58,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:58,902 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:58,902 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:59,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1848,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:59,103 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:59,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:59,103 INFO L82 PathProgramCache]: Analyzing trace with hash 193085434, now seen corresponding path program 179 times [2021-06-05 22:07:59,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:59,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719111186] [2021-06-05 22:07:59,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:59,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:59,169 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:59,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:59,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719111186] [2021-06-05 22:07:59,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719111186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:59,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678304334] [2021-06-05 22:07:59,170 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:59,252 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:07:59,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:59,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:59,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:07:59,393 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:59,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678304334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:59,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:07:59,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:07:59,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843634841] [2021-06-05 22:07:59,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:07:59,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:07:59,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:07:59,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:07:59,394 INFO L87 Difference]: Start difference. First operand 330 states and 970 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:59,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:07:59,600 INFO L93 Difference]: Finished difference Result 550 states and 1602 transitions. [2021-06-05 22:07:59,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:07:59,600 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:07:59,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:07:59,601 INFO L225 Difference]: With dead ends: 550 [2021-06-05 22:07:59,601 INFO L226 Difference]: Without dead ends: 550 [2021-06-05 22:07:59,601 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 217.6ms TimeCoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:07:59,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-06-05 22:07:59,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 342. [2021-06-05 22:07:59,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.9853372434017595) internal successors, (1018), 341 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:59,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1018 transitions. [2021-06-05 22:07:59,605 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1018 transitions. Word has length 22 [2021-06-05 22:07:59,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:07:59,605 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1018 transitions. [2021-06-05 22:07:59,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:07:59,605 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1018 transitions. [2021-06-05 22:07:59,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:07:59,605 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:07:59,605 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:07:59,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1852 [2021-06-05 22:07:59,806 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:07:59,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:07:59,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1687688398, now seen corresponding path program 180 times [2021-06-05 22:07:59,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:07:59,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889027336] [2021-06-05 22:07:59,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:07:59,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:07:59,883 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:07:59,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:07:59,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889027336] [2021-06-05 22:07:59,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889027336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:07:59,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467452116] [2021-06-05 22:07:59,884 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:07:59,991 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:07:59,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:07:59,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:07:59,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:00,129 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:00,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467452116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:00,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:00,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:08:00,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550791211] [2021-06-05 22:08:00,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:08:00,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:00,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:08:00,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:08:00,130 INFO L87 Difference]: Start difference. First operand 342 states and 1018 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:00,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:00,505 INFO L93 Difference]: Finished difference Result 542 states and 1576 transitions. [2021-06-05 22:08:00,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:08:00,506 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:08:00,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:00,506 INFO L225 Difference]: With dead ends: 542 [2021-06-05 22:08:00,506 INFO L226 Difference]: Without dead ends: 532 [2021-06-05 22:08:00,507 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 338.3ms TimeCoverageRelationStatistics Valid=125, Invalid=427, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:08:00,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-06-05 22:08:00,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 349. [2021-06-05 22:08:00,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.9655172413793105) internal successors, (1032), 348 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:00,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1032 transitions. [2021-06-05 22:08:00,510 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1032 transitions. Word has length 22 [2021-06-05 22:08:00,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:00,510 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1032 transitions. [2021-06-05 22:08:00,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:00,511 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1032 transitions. [2021-06-05 22:08:00,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:08:00,511 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:00,511 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:00,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1857,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:00,711 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:00,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:00,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1368576078, now seen corresponding path program 181 times [2021-06-05 22:08:00,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:00,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142881528] [2021-06-05 22:08:00,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:00,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:00,783 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:00,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:00,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142881528] [2021-06-05 22:08:00,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142881528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:00,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936677871] [2021-06-05 22:08:00,783 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:00,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:00,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:08:00,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:00,974 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:00,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936677871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:00,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:00,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 22:08:00,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518156386] [2021-06-05 22:08:00,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:08:00,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:00,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:08:00,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:08:00,975 INFO L87 Difference]: Start difference. First operand 349 states and 1032 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:01,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:01,155 INFO L93 Difference]: Finished difference Result 450 states and 1330 transitions. [2021-06-05 22:08:01,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:08:01,155 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:08:01,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:01,156 INFO L225 Difference]: With dead ends: 450 [2021-06-05 22:08:01,156 INFO L226 Difference]: Without dead ends: 450 [2021-06-05 22:08:01,156 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 186.3ms TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:08:01,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-06-05 22:08:01,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 327. [2021-06-05 22:08:01,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.9478527607361964) internal successors, (961), 326 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:01,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 961 transitions. [2021-06-05 22:08:01,159 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 961 transitions. Word has length 22 [2021-06-05 22:08:01,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:01,159 INFO L482 AbstractCegarLoop]: Abstraction has 327 states and 961 transitions. [2021-06-05 22:08:01,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:01,160 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 961 transitions. [2021-06-05 22:08:01,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:08:01,160 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:01,160 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:01,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1863 [2021-06-05 22:08:01,360 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:01,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:01,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1160139342, now seen corresponding path program 182 times [2021-06-05 22:08:01,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:01,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267388689] [2021-06-05 22:08:01,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:01,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:01,430 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:01,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:01,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267388689] [2021-06-05 22:08:01,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267388689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:01,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085078740] [2021-06-05 22:08:01,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:01,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:08:01,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:01,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:08:01,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:01,658 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:01,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085078740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:01,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:01,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:08:01,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058104169] [2021-06-05 22:08:01,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:08:01,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:01,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:08:01,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:08:01,659 INFO L87 Difference]: Start difference. First operand 327 states and 961 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:01,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:01,967 INFO L93 Difference]: Finished difference Result 707 states and 2023 transitions. [2021-06-05 22:08:01,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:08:01,968 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:08:01,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:01,969 INFO L225 Difference]: With dead ends: 707 [2021-06-05 22:08:01,969 INFO L226 Difference]: Without dead ends: 707 [2021-06-05 22:08:01,969 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 294.9ms TimeCoverageRelationStatistics Valid=154, Invalid=352, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:08:01,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2021-06-05 22:08:01,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 341. [2021-06-05 22:08:01,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 3.011764705882353) internal successors, (1024), 340 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:01,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1024 transitions. [2021-06-05 22:08:01,973 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1024 transitions. Word has length 22 [2021-06-05 22:08:01,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:01,973 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1024 transitions. [2021-06-05 22:08:01,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:01,973 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1024 transitions. [2021-06-05 22:08:01,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:08:01,974 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:01,974 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:02,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1866,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:02,174 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:02,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:02,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1640224990, now seen corresponding path program 183 times [2021-06-05 22:08:02,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:02,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275671793] [2021-06-05 22:08:02,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:02,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:02,246 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:02,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:02,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275671793] [2021-06-05 22:08:02,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275671793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:02,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242888840] [2021-06-05 22:08:02,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:02,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:08:02,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:02,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:08:02,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:02,479 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:02,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242888840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:02,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:02,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:08:02,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499827494] [2021-06-05 22:08:02,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:08:02,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:02,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:08:02,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:08:02,480 INFO L87 Difference]: Start difference. First operand 341 states and 1024 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:02,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:02,707 INFO L93 Difference]: Finished difference Result 650 states and 1868 transitions. [2021-06-05 22:08:02,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:08:02,708 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:08:02,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:02,709 INFO L225 Difference]: With dead ends: 650 [2021-06-05 22:08:02,709 INFO L226 Difference]: Without dead ends: 640 [2021-06-05 22:08:02,709 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 225.2ms TimeCoverageRelationStatistics Valid=119, Invalid=301, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:08:02,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-06-05 22:08:02,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 348. [2021-06-05 22:08:02,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.9913544668587897) internal successors, (1038), 347 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:02,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1038 transitions. [2021-06-05 22:08:02,713 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1038 transitions. Word has length 22 [2021-06-05 22:08:02,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:02,713 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1038 transitions. [2021-06-05 22:08:02,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:02,713 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1038 transitions. [2021-06-05 22:08:02,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:08:02,713 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:02,713 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:02,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1877 [2021-06-05 22:08:02,914 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:02,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:02,914 INFO L82 PathProgramCache]: Analyzing trace with hash -189693034, now seen corresponding path program 184 times [2021-06-05 22:08:02,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:02,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502449956] [2021-06-05 22:08:02,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:02,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:02,983 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:02,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:02,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502449956] [2021-06-05 22:08:02,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502449956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:02,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835544641] [2021-06-05 22:08:02,983 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:03,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:08:03,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:03,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:08:03,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:03,228 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:03,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835544641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:03,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:03,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:08:03,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143588260] [2021-06-05 22:08:03,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:08:03,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:03,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:08:03,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:08:03,229 INFO L87 Difference]: Start difference. First operand 348 states and 1038 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:03,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:03,428 INFO L93 Difference]: Finished difference Result 640 states and 1865 transitions. [2021-06-05 22:08:03,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:08:03,428 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:08:03,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:03,429 INFO L225 Difference]: With dead ends: 640 [2021-06-05 22:08:03,429 INFO L226 Difference]: Without dead ends: 640 [2021-06-05 22:08:03,429 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 236.5ms TimeCoverageRelationStatistics Valid=130, Invalid=290, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:08:03,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-06-05 22:08:03,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 354. [2021-06-05 22:08:03,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 3.0169971671388103) internal successors, (1065), 353 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:03,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1065 transitions. [2021-06-05 22:08:03,433 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1065 transitions. Word has length 22 [2021-06-05 22:08:03,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:03,434 INFO L482 AbstractCegarLoop]: Abstraction has 354 states and 1065 transitions. [2021-06-05 22:08:03,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:03,434 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1065 transitions. [2021-06-05 22:08:03,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:08:03,434 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:03,434 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:03,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1889,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:03,635 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:03,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:03,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1701712478, now seen corresponding path program 185 times [2021-06-05 22:08:03,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:03,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758408875] [2021-06-05 22:08:03,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:03,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:03,703 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:03,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:03,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758408875] [2021-06-05 22:08:03,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758408875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:03,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204147244] [2021-06-05 22:08:03,703 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:03,787 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:08:03,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:03,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:08:03,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:03,925 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:03,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204147244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:03,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:03,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:08:03,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326097759] [2021-06-05 22:08:03,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:08:03,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:03,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:08:03,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:08:03,926 INFO L87 Difference]: Start difference. First operand 354 states and 1065 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:04,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:04,226 INFO L93 Difference]: Finished difference Result 631 states and 1817 transitions. [2021-06-05 22:08:04,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:08:04,226 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:08:04,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:04,227 INFO L225 Difference]: With dead ends: 631 [2021-06-05 22:08:04,227 INFO L226 Difference]: Without dead ends: 622 [2021-06-05 22:08:04,227 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 272.0ms TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:08:04,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2021-06-05 22:08:04,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 360. [2021-06-05 22:08:04,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 3.0) internal successors, (1077), 359 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:04,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 1077 transitions. [2021-06-05 22:08:04,231 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 1077 transitions. Word has length 22 [2021-06-05 22:08:04,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:04,231 INFO L482 AbstractCegarLoop]: Abstraction has 360 states and 1077 transitions. [2021-06-05 22:08:04,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:04,231 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 1077 transitions. [2021-06-05 22:08:04,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:08:04,232 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:04,232 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:04,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1898,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:04,432 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:04,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:04,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1924272844, now seen corresponding path program 186 times [2021-06-05 22:08:04,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:04,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150115828] [2021-06-05 22:08:04,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:04,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:04,498 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:04,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:04,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150115828] [2021-06-05 22:08:04,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150115828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:04,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394082679] [2021-06-05 22:08:04,499 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:04,583 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:08:04,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:04,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:08:04,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:04,728 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:04,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394082679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:04,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:04,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 22:08:04,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794471299] [2021-06-05 22:08:04,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:08:04,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:04,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:08:04,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:08:04,729 INFO L87 Difference]: Start difference. First operand 360 states and 1077 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:05,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:05,022 INFO L93 Difference]: Finished difference Result 593 states and 1708 transitions. [2021-06-05 22:08:05,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:08:05,023 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:08:05,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:05,024 INFO L225 Difference]: With dead ends: 593 [2021-06-05 22:08:05,024 INFO L226 Difference]: Without dead ends: 583 [2021-06-05 22:08:05,024 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 286.7ms TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:08:05,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-06-05 22:08:05,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 372. [2021-06-05 22:08:05,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 3.0053908355795147) internal successors, (1115), 371 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:05,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1115 transitions. [2021-06-05 22:08:05,029 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1115 transitions. Word has length 22 [2021-06-05 22:08:05,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:05,029 INFO L482 AbstractCegarLoop]: Abstraction has 372 states and 1115 transitions. [2021-06-05 22:08:05,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:05,029 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1115 transitions. [2021-06-05 22:08:05,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:08:05,030 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:05,030 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:05,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1912,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:05,245 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:05,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:05,245 INFO L82 PathProgramCache]: Analyzing trace with hash -2106363156, now seen corresponding path program 187 times [2021-06-05 22:08:05,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:05,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761822083] [2021-06-05 22:08:05,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:05,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:05,315 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:05,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:05,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761822083] [2021-06-05 22:08:05,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761822083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:05,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585413155] [2021-06-05 22:08:05,316 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:05,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:05,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:08:05,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:05,531 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:05,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585413155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:05,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:05,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 22:08:05,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156699649] [2021-06-05 22:08:05,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:08:05,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:05,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:08:05,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:08:05,532 INFO L87 Difference]: Start difference. First operand 372 states and 1115 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:05,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:05,783 INFO L93 Difference]: Finished difference Result 624 states and 1771 transitions. [2021-06-05 22:08:05,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:08:05,784 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:08:05,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:05,784 INFO L225 Difference]: With dead ends: 624 [2021-06-05 22:08:05,784 INFO L226 Difference]: Without dead ends: 612 [2021-06-05 22:08:05,785 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 247.8ms TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:08:05,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-06-05 22:08:05,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 368. [2021-06-05 22:08:05,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 3.005449591280654) internal successors, (1103), 367 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:05,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1103 transitions. [2021-06-05 22:08:05,789 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1103 transitions. Word has length 22 [2021-06-05 22:08:05,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:05,789 INFO L482 AbstractCegarLoop]: Abstraction has 368 states and 1103 transitions. [2021-06-05 22:08:05,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:05,789 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1103 transitions. [2021-06-05 22:08:05,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:08:05,789 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:05,789 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:05,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1925,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:05,990 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:05,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:05,990 INFO L82 PathProgramCache]: Analyzing trace with hash 311516870, now seen corresponding path program 188 times [2021-06-05 22:08:05,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:05,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265816585] [2021-06-05 22:08:05,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:05,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:06,062 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:06,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:06,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265816585] [2021-06-05 22:08:06,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265816585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:06,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822160893] [2021-06-05 22:08:06,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:06,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:08:06,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:06,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:08:06,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:06,303 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:06,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822160893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:06,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:06,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:08:06,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465030415] [2021-06-05 22:08:06,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:08:06,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:06,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:08:06,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:08:06,304 INFO L87 Difference]: Start difference. First operand 368 states and 1103 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:06,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:06,539 INFO L93 Difference]: Finished difference Result 590 states and 1715 transitions. [2021-06-05 22:08:06,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:08:06,539 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:08:06,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:06,540 INFO L225 Difference]: With dead ends: 590 [2021-06-05 22:08:06,540 INFO L226 Difference]: Without dead ends: 590 [2021-06-05 22:08:06,540 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 252.4ms TimeCoverageRelationStatistics Valid=128, Invalid=334, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:08:06,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-06-05 22:08:06,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 373. [2021-06-05 22:08:06,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 3.0) internal successors, (1116), 372 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:06,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 1116 transitions. [2021-06-05 22:08:06,544 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 1116 transitions. Word has length 22 [2021-06-05 22:08:06,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:06,544 INFO L482 AbstractCegarLoop]: Abstraction has 373 states and 1116 transitions. [2021-06-05 22:08:06,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:06,544 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 1116 transitions. [2021-06-05 22:08:06,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:08:06,545 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:06,545 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:06,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1936 [2021-06-05 22:08:06,745 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:06,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:06,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1806119834, now seen corresponding path program 189 times [2021-06-05 22:08:06,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:06,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274977101] [2021-06-05 22:08:06,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:06,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:06,822 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:06,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:06,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274977101] [2021-06-05 22:08:06,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274977101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:06,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980840447] [2021-06-05 22:08:06,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:06,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:08:06,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:06,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:08:06,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:07,038 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:07,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980840447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:07,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:07,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:08:07,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17594826] [2021-06-05 22:08:07,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:08:07,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:07,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:08:07,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:08:07,039 INFO L87 Difference]: Start difference. First operand 373 states and 1116 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:07,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:07,301 INFO L93 Difference]: Finished difference Result 566 states and 1650 transitions. [2021-06-05 22:08:07,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:08:07,301 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:08:07,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:07,302 INFO L225 Difference]: With dead ends: 566 [2021-06-05 22:08:07,302 INFO L226 Difference]: Without dead ends: 556 [2021-06-05 22:08:07,302 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 233.7ms TimeCoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:08:07,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-06-05 22:08:07,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 352. [2021-06-05 22:08:07,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 2.9715099715099713) internal successors, (1043), 351 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:07,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1043 transitions. [2021-06-05 22:08:07,306 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1043 transitions. Word has length 22 [2021-06-05 22:08:07,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:07,306 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 1043 transitions. [2021-06-05 22:08:07,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:07,306 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1043 transitions. [2021-06-05 22:08:07,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:08:07,307 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:07,307 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:07,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1945,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:07,507 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:07,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:07,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1259786134, now seen corresponding path program 190 times [2021-06-05 22:08:07,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:07,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150068178] [2021-06-05 22:08:07,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:07,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:07,582 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:07,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:07,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150068178] [2021-06-05 22:08:07,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150068178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:07,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074542932] [2021-06-05 22:08:07,582 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:07,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:08:07,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:07,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:08:07,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:07,807 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:07,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074542932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:07,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:07,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 22:08:07,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124120402] [2021-06-05 22:08:07,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:08:07,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:07,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:08:07,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:08:07,808 INFO L87 Difference]: Start difference. First operand 352 states and 1043 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:08,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:08,033 INFO L93 Difference]: Finished difference Result 495 states and 1468 transitions. [2021-06-05 22:08:08,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:08:08,034 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:08:08,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:08,034 INFO L225 Difference]: With dead ends: 495 [2021-06-05 22:08:08,034 INFO L226 Difference]: Without dead ends: 495 [2021-06-05 22:08:08,035 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 242.3ms TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:08:08,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-06-05 22:08:08,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 349. [2021-06-05 22:08:08,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.971264367816092) internal successors, (1034), 348 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:08,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1034 transitions. [2021-06-05 22:08:08,038 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1034 transitions. Word has length 22 [2021-06-05 22:08:08,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:08,038 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1034 transitions. [2021-06-05 22:08:08,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:08,038 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1034 transitions. [2021-06-05 22:08:08,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:08:08,039 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:08,039 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:08,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1954,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:08,239 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:08,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:08,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1983718082, now seen corresponding path program 191 times [2021-06-05 22:08:08,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:08,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540493537] [2021-06-05 22:08:08,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:08,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:08,321 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:08,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:08,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540493537] [2021-06-05 22:08:08,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540493537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:08,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646297794] [2021-06-05 22:08:08,321 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:08,409 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:08:08,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:08,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:08:08,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:08,555 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:08,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646297794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:08,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:08,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:08:08,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915015369] [2021-06-05 22:08:08,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:08:08,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:08,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:08:08,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:08:08,555 INFO L87 Difference]: Start difference. First operand 349 states and 1034 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:08,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:08,769 INFO L93 Difference]: Finished difference Result 544 states and 1562 transitions. [2021-06-05 22:08:08,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:08:08,770 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:08:08,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:08,770 INFO L225 Difference]: With dead ends: 544 [2021-06-05 22:08:08,770 INFO L226 Difference]: Without dead ends: 544 [2021-06-05 22:08:08,770 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 250.8ms TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:08:08,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-06-05 22:08:08,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 357. [2021-06-05 22:08:08,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 2.9831460674157304) internal successors, (1062), 356 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:08,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1062 transitions. [2021-06-05 22:08:08,774 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1062 transitions. Word has length 22 [2021-06-05 22:08:08,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:08,774 INFO L482 AbstractCegarLoop]: Abstraction has 357 states and 1062 transitions. [2021-06-05 22:08:08,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:08,774 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1062 transitions. [2021-06-05 22:08:08,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:08:08,775 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:08,775 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:08,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1960 [2021-06-05 22:08:08,975 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:08,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:08,976 INFO L82 PathProgramCache]: Analyzing trace with hash 471698638, now seen corresponding path program 192 times [2021-06-05 22:08:08,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:08,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894273411] [2021-06-05 22:08:08,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:08,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:09,054 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:09,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:09,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894273411] [2021-06-05 22:08:09,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894273411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:09,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675790555] [2021-06-05 22:08:09,055 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:09,146 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:08:09,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:09,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:08:09,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:09,322 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:09,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675790555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:09,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:09,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:08:09,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410741188] [2021-06-05 22:08:09,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:08:09,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:09,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:08:09,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:08:09,323 INFO L87 Difference]: Start difference. First operand 357 states and 1062 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:09,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:09,650 INFO L93 Difference]: Finished difference Result 490 states and 1410 transitions. [2021-06-05 22:08:09,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:08:09,650 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:08:09,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:09,650 INFO L225 Difference]: With dead ends: 490 [2021-06-05 22:08:09,651 INFO L226 Difference]: Without dead ends: 481 [2021-06-05 22:08:09,651 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 347.1ms TimeCoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:08:09,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-06-05 22:08:09,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 357. [2021-06-05 22:08:09,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 2.955056179775281) internal successors, (1052), 356 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:09,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1052 transitions. [2021-06-05 22:08:09,654 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1052 transitions. Word has length 22 [2021-06-05 22:08:09,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:09,655 INFO L482 AbstractCegarLoop]: Abstraction has 357 states and 1052 transitions. [2021-06-05 22:08:09,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:09,655 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1052 transitions. [2021-06-05 22:08:09,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:08:09,655 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:09,655 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:09,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1965,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:09,856 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:09,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:09,856 INFO L82 PathProgramCache]: Analyzing trace with hash 293775178, now seen corresponding path program 193 times [2021-06-05 22:08:09,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:09,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110649942] [2021-06-05 22:08:09,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:09,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:09,938 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:09,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:09,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110649942] [2021-06-05 22:08:09,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110649942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:09,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672700858] [2021-06-05 22:08:09,938 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:10,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:10,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:08:10,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:10,164 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:10,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672700858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:10,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:10,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 22:08:10,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772934304] [2021-06-05 22:08:10,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:08:10,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:10,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:08:10,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:08:10,165 INFO L87 Difference]: Start difference. First operand 357 states and 1052 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:10,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:10,405 INFO L93 Difference]: Finished difference Result 454 states and 1342 transitions. [2021-06-05 22:08:10,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:08:10,405 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:08:10,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:10,406 INFO L225 Difference]: With dead ends: 454 [2021-06-05 22:08:10,406 INFO L226 Difference]: Without dead ends: 454 [2021-06-05 22:08:10,406 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 254.7ms TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:08:10,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-06-05 22:08:10,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 324. [2021-06-05 22:08:10,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.9473684210526314) internal successors, (952), 323 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:10,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 952 transitions. [2021-06-05 22:08:10,410 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 952 transitions. Word has length 22 [2021-06-05 22:08:10,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:10,410 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 952 transitions. [2021-06-05 22:08:10,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:10,410 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 952 transitions. [2021-06-05 22:08:10,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:08:10,410 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:10,410 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:10,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1970 [2021-06-05 22:08:10,611 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:10,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:10,611 INFO L82 PathProgramCache]: Analyzing trace with hash 483357642, now seen corresponding path program 194 times [2021-06-05 22:08:10,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:10,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443113052] [2021-06-05 22:08:10,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:10,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:10,649 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:08:10,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:10,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443113052] [2021-06-05 22:08:10,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443113052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:10,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040532471] [2021-06-05 22:08:10,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:10,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:08:10,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:10,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:08:10,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:10,850 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:10,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040532471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:10,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:10,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 22:08:10,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607068066] [2021-06-05 22:08:10,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:08:10,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:10,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:08:10,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:08:10,851 INFO L87 Difference]: Start difference. First operand 324 states and 952 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:11,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:11,374 INFO L93 Difference]: Finished difference Result 716 states and 2103 transitions. [2021-06-05 22:08:11,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:08:11,375 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:08:11,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:11,375 INFO L225 Difference]: With dead ends: 716 [2021-06-05 22:08:11,376 INFO L226 Difference]: Without dead ends: 614 [2021-06-05 22:08:11,376 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 324.7ms TimeCoverageRelationStatistics Valid=229, Invalid=827, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:08:11,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-06-05 22:08:11,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 309. [2021-06-05 22:08:11,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9448051948051948) internal successors, (907), 308 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:11,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 907 transitions. [2021-06-05 22:08:11,381 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 907 transitions. Word has length 22 [2021-06-05 22:08:11,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:11,381 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 907 transitions. [2021-06-05 22:08:11,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:11,381 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 907 transitions. [2021-06-05 22:08:11,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:08:11,381 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:11,381 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:11,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1974,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:11,582 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:11,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:11,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1787383922, now seen corresponding path program 195 times [2021-06-05 22:08:11,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:11,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164336935] [2021-06-05 22:08:11,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:11,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:11,637 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:08:11,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:11,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164336935] [2021-06-05 22:08:11,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164336935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:11,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300589790] [2021-06-05 22:08:11,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:11,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:08:11,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:11,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 22:08:11,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:11,847 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:08:11,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300589790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:11,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:11,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 22:08:11,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918847897] [2021-06-05 22:08:11,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:08:11,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:11,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:08:11,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:08:11,848 INFO L87 Difference]: Start difference. First operand 309 states and 907 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:11,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:11,969 INFO L93 Difference]: Finished difference Result 627 states and 1817 transitions. [2021-06-05 22:08:11,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:08:11,969 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:08:11,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:11,970 INFO L225 Difference]: With dead ends: 627 [2021-06-05 22:08:11,970 INFO L226 Difference]: Without dead ends: 576 [2021-06-05 22:08:11,970 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 132.2ms TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:08:11,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-06-05 22:08:11,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 329. [2021-06-05 22:08:11,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 3.0091463414634148) internal successors, (987), 328 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:11,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 987 transitions. [2021-06-05 22:08:11,973 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 987 transitions. Word has length 22 [2021-06-05 22:08:11,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:11,974 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 987 transitions. [2021-06-05 22:08:11,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:11,974 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 987 transitions. [2021-06-05 22:08:11,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:08:11,974 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:11,974 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:12,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1977 [2021-06-05 22:08:12,175 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:12,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:12,175 INFO L82 PathProgramCache]: Analyzing trace with hash -772869444, now seen corresponding path program 196 times [2021-06-05 22:08:12,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:12,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581890920] [2021-06-05 22:08:12,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:12,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:12,235 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:08:12,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:12,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581890920] [2021-06-05 22:08:12,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581890920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:12,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980442189] [2021-06-05 22:08:12,236 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:12,327 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:08:12,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:12,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:08:12,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:12,458 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:12,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980442189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:12,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:12,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 22:08:12,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163630915] [2021-06-05 22:08:12,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:08:12,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:12,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:08:12,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:08:12,459 INFO L87 Difference]: Start difference. First operand 329 states and 987 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:13,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:13,292 INFO L93 Difference]: Finished difference Result 999 states and 2873 transitions. [2021-06-05 22:08:13,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:08:13,292 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:08:13,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:13,293 INFO L225 Difference]: With dead ends: 999 [2021-06-05 22:08:13,293 INFO L226 Difference]: Without dead ends: 858 [2021-06-05 22:08:13,294 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 631.5ms TimeCoverageRelationStatistics Valid=322, Invalid=1238, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:08:13,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2021-06-05 22:08:13,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 339. [2021-06-05 22:08:13,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 2.9792899408284024) internal successors, (1007), 338 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:13,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1007 transitions. [2021-06-05 22:08:13,298 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1007 transitions. Word has length 22 [2021-06-05 22:08:13,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:13,298 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1007 transitions. [2021-06-05 22:08:13,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:13,298 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1007 transitions. [2021-06-05 22:08:13,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:08:13,299 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:13,299 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:13,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1988,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:13,499 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:13,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:13,499 INFO L82 PathProgramCache]: Analyzing trace with hash 400799254, now seen corresponding path program 197 times [2021-06-05 22:08:13,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:13,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137326244] [2021-06-05 22:08:13,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:13,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:13,549 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:08:13,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:13,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137326244] [2021-06-05 22:08:13,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137326244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:13,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871937830] [2021-06-05 22:08:13,550 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:13,636 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:08:13,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:13,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:08:13,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:13,768 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:13,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871937830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:13,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:13,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 22:08:13,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545011204] [2021-06-05 22:08:13,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:08:13,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:13,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:08:13,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:08:13,768 INFO L87 Difference]: Start difference. First operand 339 states and 1007 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:14,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:14,384 INFO L93 Difference]: Finished difference Result 816 states and 2373 transitions. [2021-06-05 22:08:14,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:08:14,385 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:08:14,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:14,385 INFO L225 Difference]: With dead ends: 816 [2021-06-05 22:08:14,385 INFO L226 Difference]: Without dead ends: 714 [2021-06-05 22:08:14,386 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 463.5ms TimeCoverageRelationStatistics Valid=267, Invalid=923, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:08:14,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2021-06-05 22:08:14,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 304. [2021-06-05 22:08:14,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.943894389438944) internal successors, (892), 303 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:14,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 892 transitions. [2021-06-05 22:08:14,390 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 892 transitions. Word has length 22 [2021-06-05 22:08:14,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:14,390 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 892 transitions. [2021-06-05 22:08:14,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:14,390 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 892 transitions. [2021-06-05 22:08:14,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:08:14,390 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:14,390 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:14,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1993,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:14,590 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:14,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:14,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1757356874, now seen corresponding path program 198 times [2021-06-05 22:08:14,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:14,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652278718] [2021-06-05 22:08:14,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:14,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:14,665 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:14,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:14,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652278718] [2021-06-05 22:08:14,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652278718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:14,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877097385] [2021-06-05 22:08:14,666 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:14,753 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:08:14,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:14,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:08:14,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:14,925 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:14,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877097385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:14,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:14,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:08:14,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208115371] [2021-06-05 22:08:14,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:08:14,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:14,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:08:14,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:08:14,925 INFO L87 Difference]: Start difference. First operand 304 states and 892 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:15,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:15,309 INFO L93 Difference]: Finished difference Result 674 states and 1948 transitions. [2021-06-05 22:08:15,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:08:15,310 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:08:15,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:15,310 INFO L225 Difference]: With dead ends: 674 [2021-06-05 22:08:15,310 INFO L226 Difference]: Without dead ends: 607 [2021-06-05 22:08:15,311 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 319.1ms TimeCoverageRelationStatistics Valid=201, Invalid=555, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:08:15,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-06-05 22:08:15,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 325. [2021-06-05 22:08:15,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.990740740740741) internal successors, (969), 324 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:15,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 969 transitions. [2021-06-05 22:08:15,316 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 969 transitions. Word has length 22 [2021-06-05 22:08:15,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:15,316 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 969 transitions. [2021-06-05 22:08:15,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:15,316 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 969 transitions. [2021-06-05 22:08:15,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:08:15,317 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:15,317 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:15,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2000,200 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:15,529 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:15,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:15,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1523095944, now seen corresponding path program 199 times [2021-06-05 22:08:15,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:15,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833181344] [2021-06-05 22:08:15,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:15,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:15,617 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:15,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:15,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833181344] [2021-06-05 22:08:15,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833181344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:15,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228052656] [2021-06-05 22:08:15,618 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:15,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:15,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:08:15,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:15,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:15,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:15,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:08:15,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:15,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:15,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:15,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:08:15,864 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:15,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:15,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:15,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:08:15,869 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:15,872 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:15,872 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:15,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:08:15,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 22:08:15,903 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:130, output treesize:51 [2021-06-05 22:08:16,015 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:16,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228052656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:16,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:16,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:08:16,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864365963] [2021-06-05 22:08:16,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:08:16,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:16,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:08:16,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:08:16,016 INFO L87 Difference]: Start difference. First operand 325 states and 969 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:16,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:16,540 INFO L93 Difference]: Finished difference Result 724 states and 2053 transitions. [2021-06-05 22:08:16,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:08:16,540 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:08:16,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:16,541 INFO L225 Difference]: With dead ends: 724 [2021-06-05 22:08:16,541 INFO L226 Difference]: Without dead ends: 628 [2021-06-05 22:08:16,541 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 508.0ms TimeCoverageRelationStatistics Valid=158, Invalid=598, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:08:16,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-06-05 22:08:16,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 318. [2021-06-05 22:08:16,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.968454258675079) internal successors, (941), 317 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:16,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 941 transitions. [2021-06-05 22:08:16,545 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 941 transitions. Word has length 22 [2021-06-05 22:08:16,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:16,545 INFO L482 AbstractCegarLoop]: Abstraction has 318 states and 941 transitions. [2021-06-05 22:08:16,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:16,545 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 941 transitions. [2021-06-05 22:08:16,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:08:16,546 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:16,546 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:16,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2022,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:16,746 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:16,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:16,746 INFO L82 PathProgramCache]: Analyzing trace with hash -2110841266, now seen corresponding path program 200 times [2021-06-05 22:08:16,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:16,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817757294] [2021-06-05 22:08:16,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:16,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:16,870 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:16,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:16,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817757294] [2021-06-05 22:08:16,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817757294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:16,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40252564] [2021-06-05 22:08:16,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:16,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:08:16,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:16,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:08:16,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:17,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:17,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:17,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:08:17,107 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:17,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:17,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:17,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:08:17,111 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:17,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:17,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:17,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:08:17,118 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:17,120 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:17,120 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:17,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:08:17,153 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 22:08:17,153 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:130, output treesize:51 [2021-06-05 22:08:17,257 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:17,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40252564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:17,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:17,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-05 22:08:17,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977869944] [2021-06-05 22:08:17,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:08:17,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:17,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:08:17,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:08:17,258 INFO L87 Difference]: Start difference. First operand 318 states and 941 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:17,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:17,643 INFO L93 Difference]: Finished difference Result 418 states and 1234 transitions. [2021-06-05 22:08:17,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:08:17,643 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:08:17,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:17,644 INFO L225 Difference]: With dead ends: 418 [2021-06-05 22:08:17,644 INFO L226 Difference]: Without dead ends: 400 [2021-06-05 22:08:17,644 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 435.2ms TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:08:17,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-06-05 22:08:17,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 326. [2021-06-05 22:08:17,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.9692307692307693) internal successors, (965), 325 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:17,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 965 transitions. [2021-06-05 22:08:17,647 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 965 transitions. Word has length 22 [2021-06-05 22:08:17,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:17,647 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 965 transitions. [2021-06-05 22:08:17,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:17,647 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 965 transitions. [2021-06-05 22:08:17,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:08:17,648 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:17,648 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:17,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2056 [2021-06-05 22:08:17,848 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:17,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:17,849 INFO L82 PathProgramCache]: Analyzing trace with hash 871558594, now seen corresponding path program 201 times [2021-06-05 22:08:17,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:17,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448438072] [2021-06-05 22:08:17,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:17,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:17,939 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:17,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:17,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448438072] [2021-06-05 22:08:17,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448438072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:17,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139326398] [2021-06-05 22:08:17,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:18,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:08:18,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:18,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:08:18,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:18,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:18,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:08:18,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:18,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:08:18,136 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-05 22:08:18,136 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:34 [2021-06-05 22:08:18,399 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:18,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139326398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:18,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:18,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:08:18,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798482303] [2021-06-05 22:08:18,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:08:18,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:18,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:08:18,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:08:18,400 INFO L87 Difference]: Start difference. First operand 326 states and 965 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:18,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:18,706 INFO L93 Difference]: Finished difference Result 774 states and 2239 transitions. [2021-06-05 22:08:18,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:08:18,706 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:08:18,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:18,707 INFO L225 Difference]: With dead ends: 774 [2021-06-05 22:08:18,707 INFO L226 Difference]: Without dead ends: 707 [2021-06-05 22:08:18,707 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 260.7ms TimeCoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:08:18,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2021-06-05 22:08:18,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 354. [2021-06-05 22:08:18,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 3.0509915014164304) internal successors, (1077), 353 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:18,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1077 transitions. [2021-06-05 22:08:18,712 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1077 transitions. Word has length 22 [2021-06-05 22:08:18,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:18,712 INFO L482 AbstractCegarLoop]: Abstraction has 354 states and 1077 transitions. [2021-06-05 22:08:18,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:18,712 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1077 transitions. [2021-06-05 22:08:18,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:08:18,712 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:18,712 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:18,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2085,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:18,936 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:18,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:18,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1886073072, now seen corresponding path program 202 times [2021-06-05 22:08:18,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:18,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177334439] [2021-06-05 22:08:18,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:18,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:19,010 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:08:19,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:19,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177334439] [2021-06-05 22:08:19,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177334439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:19,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684425578] [2021-06-05 22:08:19,011 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:19,105 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:08:19,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:19,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:08:19,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:19,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:19,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:08:19,203 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:19,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:08:19,218 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-05 22:08:19,218 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:32 [2021-06-05 22:08:19,438 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:19,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684425578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:19,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:19,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 22:08:19,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706211967] [2021-06-05 22:08:19,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:08:19,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:19,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:08:19,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:08:19,439 INFO L87 Difference]: Start difference. First operand 354 states and 1077 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:19,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:19,731 INFO L93 Difference]: Finished difference Result 702 states and 2030 transitions. [2021-06-05 22:08:19,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:08:19,731 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:08:19,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:19,732 INFO L225 Difference]: With dead ends: 702 [2021-06-05 22:08:19,732 INFO L226 Difference]: Without dead ends: 606 [2021-06-05 22:08:19,732 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 238.8ms TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:08:19,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2021-06-05 22:08:19,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 367. [2021-06-05 22:08:19,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 3.010928961748634) internal successors, (1102), 366 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:19,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 1102 transitions. [2021-06-05 22:08:19,737 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 1102 transitions. Word has length 22 [2021-06-05 22:08:19,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:19,737 INFO L482 AbstractCegarLoop]: Abstraction has 367 states and 1102 transitions. [2021-06-05 22:08:19,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:19,737 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 1102 transitions. [2021-06-05 22:08:19,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:08:19,738 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:19,738 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:19,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2172,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:19,945 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:19,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:19,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1235225526, now seen corresponding path program 203 times [2021-06-05 22:08:19,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:19,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466076357] [2021-06-05 22:08:19,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:19,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:20,016 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:20,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:20,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466076357] [2021-06-05 22:08:20,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466076357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:20,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119868730] [2021-06-05 22:08:20,016 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:20,106 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:08:20,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:20,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:08:20,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:20,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:20,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:08:20,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:20,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:08:20,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-05 22:08:20,245 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:30 [2021-06-05 22:08:20,313 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:20,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119868730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:20,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:20,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:08:20,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694216615] [2021-06-05 22:08:20,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:08:20,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:20,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:08:20,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:08:20,314 INFO L87 Difference]: Start difference. First operand 367 states and 1102 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:20,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:20,758 INFO L93 Difference]: Finished difference Result 533 states and 1563 transitions. [2021-06-05 22:08:20,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:08:20,758 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:08:20,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:20,759 INFO L225 Difference]: With dead ends: 533 [2021-06-05 22:08:20,759 INFO L226 Difference]: Without dead ends: 466 [2021-06-05 22:08:20,759 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 321.3ms TimeCoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:08:20,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-06-05 22:08:20,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 323. [2021-06-05 22:08:20,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.968944099378882) internal successors, (956), 322 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:20,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 956 transitions. [2021-06-05 22:08:20,762 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 956 transitions. Word has length 22 [2021-06-05 22:08:20,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:20,763 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 956 transitions. [2021-06-05 22:08:20,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:20,763 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 956 transitions. [2021-06-05 22:08:20,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:08:20,763 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:20,763 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:20,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2228,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:20,964 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:20,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:20,964 INFO L82 PathProgramCache]: Analyzing trace with hash 343747060, now seen corresponding path program 204 times [2021-06-05 22:08:20,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:20,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329159033] [2021-06-05 22:08:20,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:20,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:21,092 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:21,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:21,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329159033] [2021-06-05 22:08:21,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329159033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:21,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162620528] [2021-06-05 22:08:21,092 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:21,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:08:21,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:21,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:08:21,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:21,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:21,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:21,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:08:21,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:21,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:21,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:21,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:08:21,450 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:21,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:21,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:21,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:08:21,454 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:21,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:21,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:08:21,458 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:21,540 INFO L628 ElimStorePlain]: treesize reduction 20, result has 79.6 percent of original size [2021-06-05 22:08:21,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 4 xjuncts. [2021-06-05 22:08:21,542 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:177, output treesize:78 [2021-06-05 22:08:21,713 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:21,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162620528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:21,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:21,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-05 22:08:21,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072805452] [2021-06-05 22:08:21,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:08:21,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:21,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:08:21,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:08:21,714 INFO L87 Difference]: Start difference. First operand 323 states and 956 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:22,154 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-06-05 22:08:22,352 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-06-05 22:08:22,485 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2021-06-05 22:08:22,787 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2021-06-05 22:08:22,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:22,825 INFO L93 Difference]: Finished difference Result 585 states and 1689 transitions. [2021-06-05 22:08:22,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:08:22,826 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:08:22,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:22,826 INFO L225 Difference]: With dead ends: 585 [2021-06-05 22:08:22,826 INFO L226 Difference]: Without dead ends: 424 [2021-06-05 22:08:22,827 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 1095.3ms TimeCoverageRelationStatistics Valid=201, Invalid=669, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:08:22,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-06-05 22:08:22,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 316. [2021-06-05 22:08:22,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.961904761904762) internal successors, (933), 315 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:22,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 933 transitions. [2021-06-05 22:08:22,830 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 933 transitions. Word has length 22 [2021-06-05 22:08:22,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:22,830 INFO L482 AbstractCegarLoop]: Abstraction has 316 states and 933 transitions. [2021-06-05 22:08:22,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:22,830 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 933 transitions. [2021-06-05 22:08:22,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:08:22,830 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:22,830 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:23,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2240,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:23,031 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:23,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:23,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1676379422, now seen corresponding path program 205 times [2021-06-05 22:08:23,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:23,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141261784] [2021-06-05 22:08:23,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:23,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:23,207 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:23,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:23,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141261784] [2021-06-05 22:08:23,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141261784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:23,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409633062] [2021-06-05 22:08:23,207 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:23,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:23,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 22:08:23,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:23,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:23,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:23,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:08:23,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:23,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:08:23,444 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:23,637 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2021-06-05 22:08:23,637 INFO L628 ElimStorePlain]: treesize reduction 71, result has 69.8 percent of original size [2021-06-05 22:08:23,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:08:23,642 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:23,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:08:23,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:08:23,727 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:23,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:08:23,731 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:23,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:08:23,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:08:23,813 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:23,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:08:23,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-06-05 22:08:23,892 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:247, output treesize:150 [2021-06-05 22:08:24,108 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:24,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409633062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:24,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:24,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-05 22:08:24,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422970154] [2021-06-05 22:08:24,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:08:24,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:24,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:08:24,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:08:24,109 INFO L87 Difference]: Start difference. First operand 316 states and 933 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:25,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:25,076 INFO L93 Difference]: Finished difference Result 497 states and 1429 transitions. [2021-06-05 22:08:25,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:08:25,077 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:08:25,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:25,077 INFO L225 Difference]: With dead ends: 497 [2021-06-05 22:08:25,077 INFO L226 Difference]: Without dead ends: 386 [2021-06-05 22:08:25,077 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1020.4ms TimeCoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:08:25,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-06-05 22:08:25,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 304. [2021-06-05 22:08:25,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.943894389438944) internal successors, (892), 303 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:25,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 892 transitions. [2021-06-05 22:08:25,081 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 892 transitions. Word has length 22 [2021-06-05 22:08:25,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:25,081 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 892 transitions. [2021-06-05 22:08:25,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:25,081 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 892 transitions. [2021-06-05 22:08:25,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:08:25,082 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:25,082 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:25,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2324 [2021-06-05 22:08:25,297 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:25,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:25,297 INFO L82 PathProgramCache]: Analyzing trace with hash -410758918, now seen corresponding path program 206 times [2021-06-05 22:08:25,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:25,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530538792] [2021-06-05 22:08:25,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:25,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:25,407 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:08:25,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:25,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530538792] [2021-06-05 22:08:25,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530538792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:25,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697524348] [2021-06-05 22:08:25,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:25,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:08:25,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:25,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 22:08:25,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:25,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:08:25,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:25,633 INFO L628 ElimStorePlain]: treesize reduction 26, result has 77.2 percent of original size [2021-06-05 22:08:25,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:08:25,644 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:25,696 INFO L628 ElimStorePlain]: treesize reduction 19, result has 77.4 percent of original size [2021-06-05 22:08:25,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:08:25,699 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:25,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:08:25,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:08:25,727 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:25,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:08:25,751 INFO L518 ElimStorePlain]: Eliminatee v_prenex_52 vanished before elimination [2021-06-05 22:08:25,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 5 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 22:08:25,753 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:117, output treesize:50 [2021-06-05 22:08:26,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:26,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:26,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:08:26,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:26,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:26,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:26,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:08:26,304 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:26,307 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:26,308 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:26,311 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:26,311 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:26,427 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-06-05 22:08:26,427 INFO L628 ElimStorePlain]: treesize reduction 133, result has 42.7 percent of original size [2021-06-05 22:08:26,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:08:26,431 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:26,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:08:26,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:08:26,476 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:306, output treesize:70 [2021-06-05 22:08:26,624 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:08:26,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697524348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:26,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:26,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:08:26,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952028051] [2021-06-05 22:08:26,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:08:26,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:26,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:08:26,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:08:26,625 INFO L87 Difference]: Start difference. First operand 304 states and 892 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:27,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:27,543 INFO L93 Difference]: Finished difference Result 860 states and 2502 transitions. [2021-06-05 22:08:27,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:08:27,544 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:08:27,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:27,545 INFO L225 Difference]: With dead ends: 860 [2021-06-05 22:08:27,545 INFO L226 Difference]: Without dead ends: 766 [2021-06-05 22:08:27,545 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 1012.5ms TimeCoverageRelationStatistics Valid=156, Invalid=714, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:08:27,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2021-06-05 22:08:27,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 333. [2021-06-05 22:08:27,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 3.0542168674698793) internal successors, (1014), 332 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:27,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1014 transitions. [2021-06-05 22:08:27,549 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1014 transitions. Word has length 23 [2021-06-05 22:08:27,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:27,549 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 1014 transitions. [2021-06-05 22:08:27,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:27,549 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1014 transitions. [2021-06-05 22:08:27,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:08:27,550 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:27,550 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:27,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2352,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:27,750 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:27,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:27,751 INFO L82 PathProgramCache]: Analyzing trace with hash -2116971352, now seen corresponding path program 207 times [2021-06-05 22:08:27,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:27,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446334781] [2021-06-05 22:08:27,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:27,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:27,917 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:08:27,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:27,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446334781] [2021-06-05 22:08:27,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446334781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:27,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696087862] [2021-06-05 22:08:27,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:28,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:08:28,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:28,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 22:08:28,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:28,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:08:28,065 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:28,136 INFO L628 ElimStorePlain]: treesize reduction 31, result has 73.9 percent of original size [2021-06-05 22:08:28,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:08:28,139 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:28,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:08:28,144 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:28,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:08:28,147 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:28,194 INFO L628 ElimStorePlain]: treesize reduction 19, result has 75.3 percent of original size [2021-06-05 22:08:28,196 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 22:08:28,196 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:122, output treesize:50 [2021-06-05 22:08:28,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:28,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:28,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:08:28,540 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:28,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:28,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:28,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:08:28,544 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:28,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:28,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:28,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:08:28,549 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:28,551 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:28,552 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:28,589 INFO L628 ElimStorePlain]: treesize reduction 29, result has 59.7 percent of original size [2021-06-05 22:08:28,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:08:28,590 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:155, output treesize:35 [2021-06-05 22:08:28,669 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:08:28,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696087862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:28,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:28,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-06-05 22:08:28,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868637533] [2021-06-05 22:08:28,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:08:28,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:28,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:08:28,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:08:28,669 INFO L87 Difference]: Start difference. First operand 333 states and 1014 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:31,383 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2021-06-05 22:08:32,123 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 73 [2021-06-05 22:08:32,525 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2021-06-05 22:08:32,659 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2021-06-05 22:08:33,053 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-06-05 22:08:33,185 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2021-06-05 22:08:33,323 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2021-06-05 22:08:33,485 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 71 [2021-06-05 22:08:33,639 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2021-06-05 22:08:33,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:33,752 INFO L93 Difference]: Finished difference Result 1183 states and 3328 transitions. [2021-06-05 22:08:33,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 22:08:33,752 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:08:33,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:33,753 INFO L225 Difference]: With dead ends: 1183 [2021-06-05 22:08:33,753 INFO L226 Difference]: Without dead ends: 983 [2021-06-05 22:08:33,754 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 4652.6ms TimeCoverageRelationStatistics Valid=596, Invalid=3564, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 22:08:33,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2021-06-05 22:08:33,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 404. [2021-06-05 22:08:33,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 3.129032258064516) internal successors, (1261), 403 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:33,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 1261 transitions. [2021-06-05 22:08:33,760 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 1261 transitions. Word has length 23 [2021-06-05 22:08:33,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:33,760 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 1261 transitions. [2021-06-05 22:08:33,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:33,760 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 1261 transitions. [2021-06-05 22:08:33,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:08:33,760 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:33,760 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:33,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2509,209 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:33,961 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:33,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:33,961 INFO L82 PathProgramCache]: Analyzing trace with hash -305065448, now seen corresponding path program 208 times [2021-06-05 22:08:33,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:33,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371032626] [2021-06-05 22:08:33,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:33,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:34,116 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:08:34,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:34,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371032626] [2021-06-05 22:08:34,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371032626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:34,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147098772] [2021-06-05 22:08:34,116 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:34,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:08:34,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:34,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 22:08:34,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:34,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:08:34,247 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:34,319 INFO L628 ElimStorePlain]: treesize reduction 31, result has 73.9 percent of original size [2021-06-05 22:08:34,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:08:34,323 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:34,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:08:34,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:08:34,360 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:34,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:08:34,363 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:34,410 INFO L628 ElimStorePlain]: treesize reduction 19, result has 75.3 percent of original size [2021-06-05 22:08:34,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 22:08:34,412 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:122, output treesize:50 [2021-06-05 22:08:34,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:34,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:34,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:08:34,816 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:34,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:34,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:34,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:08:34,821 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:34,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:34,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:34,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:08:34,825 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:34,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:34,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:08:34,831 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:34,878 INFO L628 ElimStorePlain]: treesize reduction 50, result has 46.2 percent of original size [2021-06-05 22:08:34,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:08:34,879 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:155, output treesize:35 [2021-06-05 22:08:34,950 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:08:34,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147098772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:34,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:34,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-06-05 22:08:34,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401677166] [2021-06-05 22:08:34,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:08:34,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:34,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:08:34,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:08:34,951 INFO L87 Difference]: Start difference. First operand 404 states and 1261 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:37,785 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-06-05 22:08:37,927 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-06-05 22:08:37,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:37,961 INFO L93 Difference]: Finished difference Result 977 states and 2802 transitions. [2021-06-05 22:08:37,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 22:08:37,962 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:08:37,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:37,963 INFO L225 Difference]: With dead ends: 977 [2021-06-05 22:08:37,963 INFO L226 Difference]: Without dead ends: 823 [2021-06-05 22:08:37,963 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 2699.6ms TimeCoverageRelationStatistics Valid=359, Invalid=2091, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 22:08:37,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2021-06-05 22:08:37,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 427. [2021-06-05 22:08:37,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 3.1103286384976525) internal successors, (1325), 426 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:37,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1325 transitions. [2021-06-05 22:08:37,968 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1325 transitions. Word has length 23 [2021-06-05 22:08:37,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:37,968 INFO L482 AbstractCegarLoop]: Abstraction has 427 states and 1325 transitions. [2021-06-05 22:08:37,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:37,968 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1325 transitions. [2021-06-05 22:08:37,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:08:37,969 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:37,969 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:38,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2563 [2021-06-05 22:08:38,169 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:38,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:38,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1627372824, now seen corresponding path program 209 times [2021-06-05 22:08:38,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:38,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144235519] [2021-06-05 22:08:38,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:38,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:38,265 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:08:38,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:38,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144235519] [2021-06-05 22:08:38,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144235519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:38,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701145514] [2021-06-05 22:08:38,266 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:38,380 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:08:38,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:38,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:08:38,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:38,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:08:38,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:38,527 INFO L628 ElimStorePlain]: treesize reduction 4, result has 95.7 percent of original size [2021-06-05 22:08:38,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:08:38,531 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:38,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:08:38,534 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:38,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:08:38,537 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:38,590 INFO L628 ElimStorePlain]: treesize reduction 19, result has 75.3 percent of original size [2021-06-05 22:08:38,592 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 22:08:38,593 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:95, output treesize:50 [2021-06-05 22:08:38,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:38,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:38,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:08:38,826 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:38,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:38,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:38,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:08:38,830 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:38,832 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:38,832 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:38,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:08:38,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:08:38,843 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:82, output treesize:20 [2021-06-05 22:08:38,901 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:08:38,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701145514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:38,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:38,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:08:38,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575199797] [2021-06-05 22:08:38,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:08:38,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:38,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:08:38,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:08:38,902 INFO L87 Difference]: Start difference. First operand 427 states and 1325 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:41,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:41,159 INFO L93 Difference]: Finished difference Result 970 states and 2782 transitions. [2021-06-05 22:08:41,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:08:41,159 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:08:41,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:41,160 INFO L225 Difference]: With dead ends: 970 [2021-06-05 22:08:41,161 INFO L226 Difference]: Without dead ends: 830 [2021-06-05 22:08:41,161 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 1987.6ms TimeCoverageRelationStatistics Valid=336, Invalid=1470, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:08:41,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-06-05 22:08:41,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 517. [2021-06-05 22:08:41,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 3.011627906976744) internal successors, (1554), 516 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:41,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 1554 transitions. [2021-06-05 22:08:41,166 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 1554 transitions. Word has length 23 [2021-06-05 22:08:41,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:41,166 INFO L482 AbstractCegarLoop]: Abstraction has 517 states and 1554 transitions. [2021-06-05 22:08:41,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:41,167 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 1554 transitions. [2021-06-05 22:08:41,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:08:41,167 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:41,167 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:41,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2641,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:41,368 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:41,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:41,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1406216122, now seen corresponding path program 210 times [2021-06-05 22:08:41,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:41,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860693563] [2021-06-05 22:08:41,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:41,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:41,455 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:08:41,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:41,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860693563] [2021-06-05 22:08:41,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860693563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:41,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988538688] [2021-06-05 22:08:41,456 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:41,553 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:08:41,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:41,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 22:08:41,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:41,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:08:41,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:41,720 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-06-05 22:08:41,720 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.9 percent of original size [2021-06-05 22:08:41,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:08:41,724 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:41,786 INFO L628 ElimStorePlain]: treesize reduction 50, result has 58.7 percent of original size [2021-06-05 22:08:41,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:08:41,789 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:41,842 INFO L628 ElimStorePlain]: treesize reduction 3, result has 95.6 percent of original size [2021-06-05 22:08:41,842 INFO L518 ElimStorePlain]: Eliminatee v_prenex_63 vanished before elimination [2021-06-05 22:08:41,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 22:08:41,844 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:132, output treesize:57 [2021-06-05 22:08:42,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:42,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:42,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:08:42,326 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:42,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:42,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:42,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:08:42,330 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:42,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:42,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:42,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:08:42,336 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:42,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:42,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:08:42,340 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:42,467 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2021-06-05 22:08:42,468 INFO L628 ElimStorePlain]: treesize reduction 99, result has 55.2 percent of original size [2021-06-05 22:08:42,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:08:42,472 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:42,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:08:42,475 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:42,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:08:42,528 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 22:08:42,528 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:301, output treesize:78 [2021-06-05 22:08:42,678 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:08:42,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988538688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:42,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:42,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:08:42,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866488479] [2021-06-05 22:08:42,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:08:42,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:42,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:08:42,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:08:42,679 INFO L87 Difference]: Start difference. First operand 517 states and 1554 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:44,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:44,704 INFO L93 Difference]: Finished difference Result 1104 states and 3228 transitions. [2021-06-05 22:08:44,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 22:08:44,704 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:08:44,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:44,705 INFO L225 Difference]: With dead ends: 1104 [2021-06-05 22:08:44,705 INFO L226 Difference]: Without dead ends: 897 [2021-06-05 22:08:44,706 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1539.2ms TimeCoverageRelationStatistics Valid=205, Invalid=1775, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 22:08:44,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2021-06-05 22:08:44,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 558. [2021-06-05 22:08:44,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 557 states have (on average 3.0215439856373427) internal successors, (1683), 557 states have internal predecessors, (1683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:44,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 1683 transitions. [2021-06-05 22:08:44,712 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 1683 transitions. Word has length 23 [2021-06-05 22:08:44,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:44,712 INFO L482 AbstractCegarLoop]: Abstraction has 558 states and 1683 transitions. [2021-06-05 22:08:44,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:44,712 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 1683 transitions. [2021-06-05 22:08:44,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:08:44,712 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:44,712 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:44,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2678 [2021-06-05 22:08:44,913 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:44,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:44,913 INFO L82 PathProgramCache]: Analyzing trace with hash 637122102, now seen corresponding path program 211 times [2021-06-05 22:08:44,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:44,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41852186] [2021-06-05 22:08:44,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:44,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:45,015 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:08:45,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:45,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41852186] [2021-06-05 22:08:45,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41852186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:45,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743199858] [2021-06-05 22:08:45,016 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:45,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:45,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:08:45,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:45,318 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_68, v_prenex_69, ends_with_2, v_prenex_70], 1=[ends_with_6]} [2021-06-05 22:08:45,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:08:45,324 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:45,327 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:45,327 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:45,407 INFO L628 ElimStorePlain]: treesize reduction 124, result has 39.5 percent of original size [2021-06-05 22:08:45,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:08:45,411 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:45,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:08:45,443 INFO L518 ElimStorePlain]: Eliminatee ends_with_2 vanished before elimination [2021-06-05 22:08:45,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:08:45,446 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:45,504 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.6 percent of original size [2021-06-05 22:08:45,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:08:45,508 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:45,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:08:45,511 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:45,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:08:45,515 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:45,561 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.4 percent of original size [2021-06-05 22:08:45,562 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 5 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:08:45,562 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:241, output treesize:35 [2021-06-05 22:08:45,645 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:08:45,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743199858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:45,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:45,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 22:08:45,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143006090] [2021-06-05 22:08:45,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:08:45,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:45,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:08:45,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:08:45,646 INFO L87 Difference]: Start difference. First operand 558 states and 1683 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:45,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:45,887 INFO L93 Difference]: Finished difference Result 750 states and 2242 transitions. [2021-06-05 22:08:45,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:08:45,887 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:08:45,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:45,888 INFO L225 Difference]: With dead ends: 750 [2021-06-05 22:08:45,888 INFO L226 Difference]: Without dead ends: 696 [2021-06-05 22:08:45,888 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 295.9ms TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:08:45,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2021-06-05 22:08:45,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 558. [2021-06-05 22:08:45,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 557 states have (on average 3.0215439856373427) internal successors, (1683), 557 states have internal predecessors, (1683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:45,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 1683 transitions. [2021-06-05 22:08:45,894 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 1683 transitions. Word has length 23 [2021-06-05 22:08:45,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:45,894 INFO L482 AbstractCegarLoop]: Abstraction has 558 states and 1683 transitions. [2021-06-05 22:08:45,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:45,894 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 1683 transitions. [2021-06-05 22:08:45,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:08:45,895 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:45,895 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:46,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2837,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:46,096 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:46,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:46,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1079785372, now seen corresponding path program 212 times [2021-06-05 22:08:46,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:46,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241466412] [2021-06-05 22:08:46,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:46,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:46,189 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:08:46,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:46,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241466412] [2021-06-05 22:08:46,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241466412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:46,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528329645] [2021-06-05 22:08:46,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:46,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:08:46,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:46,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 22:08:46,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:46,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:08:46,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:46,447 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.2 percent of original size [2021-06-05 22:08:46,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:08:46,450 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:46,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:08:46,454 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:46,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:08:46,457 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:46,513 INFO L628 ElimStorePlain]: treesize reduction 22, result has 75.3 percent of original size [2021-06-05 22:08:46,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 22:08:46,515 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:107, output treesize:59 [2021-06-05 22:08:46,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:46,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:46,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:08:46,710 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:46,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:46,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:46,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:08:46,716 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:46,719 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:46,719 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:46,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:46,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:08:46,723 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:46,832 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-06-05 22:08:46,833 INFO L628 ElimStorePlain]: treesize reduction 136, result has 42.1 percent of original size [2021-06-05 22:08:46,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:08:46,836 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:46,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:08:46,889 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:08:46,889 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:309, output treesize:70 [2021-06-05 22:08:47,032 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:08:47,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528329645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:47,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:47,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 22:08:47,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181778148] [2021-06-05 22:08:47,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:08:47,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:47,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:08:47,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:08:47,033 INFO L87 Difference]: Start difference. First operand 558 states and 1683 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:47,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:47,792 INFO L93 Difference]: Finished difference Result 1129 states and 3259 transitions. [2021-06-05 22:08:47,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:08:47,792 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:08:47,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:47,793 INFO L225 Difference]: With dead ends: 1129 [2021-06-05 22:08:47,793 INFO L226 Difference]: Without dead ends: 967 [2021-06-05 22:08:47,793 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 822.1ms TimeCoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:08:47,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2021-06-05 22:08:47,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 588. [2021-06-05 22:08:47,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 587 states have (on average 3.110732538330494) internal successors, (1826), 587 states have internal predecessors, (1826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:47,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 1826 transitions. [2021-06-05 22:08:47,800 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 1826 transitions. Word has length 23 [2021-06-05 22:08:47,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:47,800 INFO L482 AbstractCegarLoop]: Abstraction has 588 states and 1826 transitions. [2021-06-05 22:08:47,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:47,800 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 1826 transitions. [2021-06-05 22:08:47,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:08:47,801 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:47,801 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:48,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2876 [2021-06-05 22:08:48,001 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:48,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:48,002 INFO L82 PathProgramCache]: Analyzing trace with hash 353330104, now seen corresponding path program 213 times [2021-06-05 22:08:48,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:48,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261124357] [2021-06-05 22:08:48,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:48,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:48,105 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:08:48,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:48,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261124357] [2021-06-05 22:08:48,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261124357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:48,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713801168] [2021-06-05 22:08:48,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:48,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:08:48,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:48,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 22:08:48,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:48,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:08:48,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:48,349 INFO L628 ElimStorePlain]: treesize reduction 34, result has 74.6 percent of original size [2021-06-05 22:08:48,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:08:48,353 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:48,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:08:48,356 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:48,415 INFO L628 ElimStorePlain]: treesize reduction 22, result has 76.1 percent of original size [2021-06-05 22:08:48,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:08:48,418 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:48,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:08:48,448 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 22:08:48,448 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:137, output treesize:59 [2021-06-05 22:08:48,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:48,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:48,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:08:48,660 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:48,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:48,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:48,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:08:48,664 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:48,666 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:48,666 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:48,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:48,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:08:48,670 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:48,707 INFO L628 ElimStorePlain]: treesize reduction 29, result has 59.7 percent of original size [2021-06-05 22:08:48,708 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:08:48,708 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:155, output treesize:35 [2021-06-05 22:08:48,767 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:08:48,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713801168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:48,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:48,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2021-06-05 22:08:48,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76799756] [2021-06-05 22:08:48,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:08:48,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:48,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:08:48,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:08:48,768 INFO L87 Difference]: Start difference. First operand 588 states and 1826 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:50,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:50,410 INFO L93 Difference]: Finished difference Result 1145 states and 3412 transitions. [2021-06-05 22:08:50,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:08:50,411 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:08:50,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:50,412 INFO L225 Difference]: With dead ends: 1145 [2021-06-05 22:08:50,412 INFO L226 Difference]: Without dead ends: 965 [2021-06-05 22:08:50,412 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 1276.2ms TimeCoverageRelationStatistics Valid=199, Invalid=1361, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:08:50,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states. [2021-06-05 22:08:50,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 639. [2021-06-05 22:08:50,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 3.115987460815047) internal successors, (1988), 638 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:50,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 1988 transitions. [2021-06-05 22:08:50,419 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 1988 transitions. Word has length 23 [2021-06-05 22:08:50,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:50,419 INFO L482 AbstractCegarLoop]: Abstraction has 639 states and 1988 transitions. [2021-06-05 22:08:50,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:50,419 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 1988 transitions. [2021-06-05 22:08:50,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:08:50,420 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:50,420 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:50,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2930,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:50,620 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:50,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:50,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1859126854, now seen corresponding path program 214 times [2021-06-05 22:08:50,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:50,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045377493] [2021-06-05 22:08:50,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:50,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:50,759 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:08:50,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:50,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045377493] [2021-06-05 22:08:50,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045377493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:50,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239080740] [2021-06-05 22:08:50,760 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:50,851 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:08:50,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:50,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 22:08:50,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:50,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:08:50,920 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:51,041 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 38 [2021-06-05 22:08:51,042 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.7 percent of original size [2021-06-05 22:08:51,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:08:51,045 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:51,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:08:51,049 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:51,128 INFO L628 ElimStorePlain]: treesize reduction 52, result has 64.9 percent of original size [2021-06-05 22:08:51,128 INFO L518 ElimStorePlain]: Eliminatee v_prenex_78 vanished before elimination [2021-06-05 22:08:51,128 INFO L518 ElimStorePlain]: Eliminatee ends_with_2 vanished before elimination [2021-06-05 22:08:51,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:08:51,131 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:51,187 INFO L628 ElimStorePlain]: treesize reduction 22, result has 76.1 percent of original size [2021-06-05 22:08:51,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 5 dim-1 vars, End of recursive call: 3 dim-0 vars, and 3 xjuncts. [2021-06-05 22:08:51,190 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:160, output treesize:70 [2021-06-05 22:08:51,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:51,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:51,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:08:51,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:51,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:51,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:51,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:08:51,804 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:51,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:51,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:51,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:08:51,810 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:51,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:51,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:08:51,814 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:51,946 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2021-06-05 22:08:51,946 INFO L628 ElimStorePlain]: treesize reduction 199, result has 37.8 percent of original size [2021-06-05 22:08:51,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:08:51,950 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:51,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:08:51,954 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:52,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:08:52,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:08:52,008 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:52,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:08:52,059 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:08:52,059 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:394, output treesize:68 [2021-06-05 22:08:52,208 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:08:52,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239080740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:52,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:52,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 22:08:52,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655319121] [2021-06-05 22:08:52,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:08:52,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:52,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:08:52,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:08:52,209 INFO L87 Difference]: Start difference. First operand 639 states and 1988 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:55,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:55,336 INFO L93 Difference]: Finished difference Result 1668 states and 4813 transitions. [2021-06-05 22:08:55,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 22:08:55,336 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:08:55,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:55,338 INFO L225 Difference]: With dead ends: 1668 [2021-06-05 22:08:55,338 INFO L226 Difference]: Without dead ends: 1480 [2021-06-05 22:08:55,338 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 2767.3ms TimeCoverageRelationStatistics Valid=354, Invalid=2402, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 22:08:55,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2021-06-05 22:08:55,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 678. [2021-06-05 22:08:55,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 678 states, 677 states have (on average 3.193500738552437) internal successors, (2162), 677 states have internal predecessors, (2162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:55,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 2162 transitions. [2021-06-05 22:08:55,347 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 2162 transitions. Word has length 23 [2021-06-05 22:08:55,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:55,347 INFO L482 AbstractCegarLoop]: Abstraction has 678 states and 2162 transitions. [2021-06-05 22:08:55,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:55,347 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 2162 transitions. [2021-06-05 22:08:55,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:08:55,348 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:55,348 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:55,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2964 [2021-06-05 22:08:55,549 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:55,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:55,549 INFO L82 PathProgramCache]: Analyzing trace with hash 630316840, now seen corresponding path program 215 times [2021-06-05 22:08:55,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:55,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74653411] [2021-06-05 22:08:55,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:55,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:55,675 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:08:55,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:55,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74653411] [2021-06-05 22:08:55,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74653411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:55,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425730845] [2021-06-05 22:08:55,676 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:55,768 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:08:55,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:55,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:08:55,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:55,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:08:55,828 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:55,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:08:55,832 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:55,834 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:08:55,835 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:55,893 INFO L628 ElimStorePlain]: treesize reduction 29, result has 70.7 percent of original size [2021-06-05 22:08:55,894 INFO L518 ElimStorePlain]: Eliminatee v_prenex_86 vanished before elimination [2021-06-05 22:08:55,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:08:55,897 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:55,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:08:55,927 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 22:08:55,927 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:137, output treesize:59 [2021-06-05 22:08:56,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:56,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:56,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:08:56,129 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:56,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:56,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:56,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:08:56,134 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:56,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:56,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:08:56,138 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:56,200 INFO L628 ElimStorePlain]: treesize reduction 86, result has 40.7 percent of original size [2021-06-05 22:08:56,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:08:56,203 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:56,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:08:56,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:08:56,226 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:37 [2021-06-05 22:08:56,331 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:08:56,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425730845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:56,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:56,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 22:08:56,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473004288] [2021-06-05 22:08:56,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:08:56,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:56,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:08:56,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:08:56,332 INFO L87 Difference]: Start difference. First operand 678 states and 2162 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:58,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:58,122 INFO L93 Difference]: Finished difference Result 1398 states and 4082 transitions. [2021-06-05 22:08:58,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 22:08:58,122 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:08:58,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:58,124 INFO L225 Difference]: With dead ends: 1398 [2021-06-05 22:08:58,124 INFO L226 Difference]: Without dead ends: 1240 [2021-06-05 22:08:58,124 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 1507.8ms TimeCoverageRelationStatistics Valid=248, Invalid=1474, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:08:58,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2021-06-05 22:08:58,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 675. [2021-06-05 22:08:58,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 674 states have (on average 3.1839762611275964) internal successors, (2146), 674 states have internal predecessors, (2146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:58,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 2146 transitions. [2021-06-05 22:08:58,133 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 2146 transitions. Word has length 23 [2021-06-05 22:08:58,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:58,133 INFO L482 AbstractCegarLoop]: Abstraction has 675 states and 2146 transitions. [2021-06-05 22:08:58,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:58,133 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 2146 transitions. [2021-06-05 22:08:58,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:08:58,133 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:58,134 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:58,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3182 [2021-06-05 22:08:58,334 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:58,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:58,334 INFO L82 PathProgramCache]: Analyzing trace with hash 620245514, now seen corresponding path program 216 times [2021-06-05 22:08:58,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:58,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687540759] [2021-06-05 22:08:58,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:58,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:08:58,452 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:08:58,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:08:58,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687540759] [2021-06-05 22:08:58,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687540759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:58,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794957202] [2021-06-05 22:08:58,452 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:58,546 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:08:58,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:08:58,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:08:58,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:08:58,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:08:58,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:58,708 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-06-05 22:08:58,708 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.9 percent of original size [2021-06-05 22:08:58,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:08:58,712 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:58,781 INFO L628 ElimStorePlain]: treesize reduction 50, result has 58.3 percent of original size [2021-06-05 22:08:58,781 INFO L518 ElimStorePlain]: Eliminatee v_prenex_90 vanished before elimination [2021-06-05 22:08:58,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:08:58,785 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:58,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:08:58,814 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 22:08:58,814 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:132, output treesize:59 [2021-06-05 22:08:59,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:59,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:59,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:08:59,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:59,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:59,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:59,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:08:59,026 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:59,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:08:59,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:08:59,029 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:08:59,052 INFO L628 ElimStorePlain]: treesize reduction 20, result has 58.3 percent of original size [2021-06-05 22:08:59,053 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:08:59,053 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:82, output treesize:20 [2021-06-05 22:08:59,106 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:08:59,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794957202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:08:59,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:08:59,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 22:08:59,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825450447] [2021-06-05 22:08:59,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:08:59,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:08:59,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:08:59,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:08:59,107 INFO L87 Difference]: Start difference. First operand 675 states and 2146 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:59,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:08:59,762 INFO L93 Difference]: Finished difference Result 931 states and 2785 transitions. [2021-06-05 22:08:59,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:08:59,762 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:08:59,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:08:59,764 INFO L225 Difference]: With dead ends: 931 [2021-06-05 22:08:59,764 INFO L226 Difference]: Without dead ends: 811 [2021-06-05 22:08:59,764 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 549.3ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:08:59,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2021-06-05 22:08:59,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 677. [2021-06-05 22:08:59,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 676 states have (on average 3.1819526627218937) internal successors, (2151), 676 states have internal predecessors, (2151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:59,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 2151 transitions. [2021-06-05 22:08:59,771 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 2151 transitions. Word has length 23 [2021-06-05 22:08:59,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:08:59,771 INFO L482 AbstractCegarLoop]: Abstraction has 677 states and 2151 transitions. [2021-06-05 22:08:59,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:08:59,771 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 2151 transitions. [2021-06-05 22:08:59,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:08:59,771 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:08:59,772 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:08:59,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3219,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:08:59,972 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:08:59,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:08:59,972 INFO L82 PathProgramCache]: Analyzing trace with hash -161287938, now seen corresponding path program 217 times [2021-06-05 22:08:59,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:08:59,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994835704] [2021-06-05 22:08:59,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:08:59,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:00,097 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:09:00,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:00,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994835704] [2021-06-05 22:09:00,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994835704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:00,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779581197] [2021-06-05 22:09:00,097 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:00,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:00,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 22:09:00,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:00,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:00,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:00,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:00,267 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:00,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:00,270 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:00,331 INFO L628 ElimStorePlain]: treesize reduction 55, result has 56.0 percent of original size [2021-06-05 22:09:00,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:09:00,335 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:00,362 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:00,362 INFO L518 ElimStorePlain]: Eliminatee v_prenex_94 vanished before elimination [2021-06-05 22:09:00,364 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 22:09:00,364 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:137, output treesize:59 [2021-06-05 22:09:00,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:00,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:00,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:09:00,599 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:00,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:00,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:00,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:09:00,604 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:00,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:00,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:00,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:09:00,609 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:00,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:00,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:09:00,613 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:00,655 INFO L628 ElimStorePlain]: treesize reduction 49, result has 46.7 percent of original size [2021-06-05 22:09:00,656 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:09:00,656 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:35 [2021-06-05 22:09:00,718 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:00,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779581197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:00,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:00,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 22:09:00,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240084144] [2021-06-05 22:09:00,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:09:00,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:00,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:09:00,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:09:00,718 INFO L87 Difference]: Start difference. First operand 677 states and 2151 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:02,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:02,750 INFO L93 Difference]: Finished difference Result 1484 states and 4400 transitions. [2021-06-05 22:09:02,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 22:09:02,750 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:09:02,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:02,752 INFO L225 Difference]: With dead ends: 1484 [2021-06-05 22:09:02,752 INFO L226 Difference]: Without dead ends: 1238 [2021-06-05 22:09:02,752 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1745.3ms TimeCoverageRelationStatistics Valid=252, Invalid=2004, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 22:09:02,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2021-06-05 22:09:02,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 688. [2021-06-05 22:09:02,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 687 states have (on average 3.1935953420669576) internal successors, (2194), 687 states have internal predecessors, (2194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:02,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 2194 transitions. [2021-06-05 22:09:02,760 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 2194 transitions. Word has length 23 [2021-06-05 22:09:02,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:02,760 INFO L482 AbstractCegarLoop]: Abstraction has 688 states and 2194 transitions. [2021-06-05 22:09:02,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:02,760 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 2194 transitions. [2021-06-05 22:09:02,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:09:02,761 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:02,761 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:02,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3248 [2021-06-05 22:09:02,983 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:02,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:02,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1644882548, now seen corresponding path program 218 times [2021-06-05 22:09:02,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:02,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491720129] [2021-06-05 22:09:02,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:02,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:03,081 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:09:03,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:03,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491720129] [2021-06-05 22:09:03,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491720129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:03,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438931399] [2021-06-05 22:09:03,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:03,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:09:03,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:03,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 22:09:03,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:03,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:09:03,317 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:03,415 INFO L628 ElimStorePlain]: treesize reduction 29, result has 77.5 percent of original size [2021-06-05 22:09:03,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:03,418 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:03,457 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:03,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:09:03,460 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:03,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:03,498 INFO L518 ElimStorePlain]: Eliminatee v_prenex_98 vanished before elimination [2021-06-05 22:09:03,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:03,501 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:03,562 INFO L628 ElimStorePlain]: treesize reduction 22, result has 75.3 percent of original size [2021-06-05 22:09:03,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 5 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 22:09:03,565 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:132, output treesize:59 [2021-06-05 22:09:03,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:03,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:03,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:09:03,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:03,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:03,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:03,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:09:03,810 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:03,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:03,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:03,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:09:03,813 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:03,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:03,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:09:03,817 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:03,859 INFO L628 ElimStorePlain]: treesize reduction 50, result has 46.2 percent of original size [2021-06-05 22:09:03,860 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:09:03,860 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:155, output treesize:35 [2021-06-05 22:09:03,920 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:09:03,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438931399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:03,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:03,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:09:03,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506129947] [2021-06-05 22:09:03,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:09:03,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:03,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:09:03,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:09:03,921 INFO L87 Difference]: Start difference. First operand 688 states and 2194 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:05,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:05,320 INFO L93 Difference]: Finished difference Result 1183 states and 3509 transitions. [2021-06-05 22:09:05,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 22:09:05,320 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:09:05,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:05,322 INFO L225 Difference]: With dead ends: 1183 [2021-06-05 22:09:05,322 INFO L226 Difference]: Without dead ends: 1017 [2021-06-05 22:09:05,322 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 1071.8ms TimeCoverageRelationStatistics Valid=181, Invalid=1459, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:09:05,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2021-06-05 22:09:05,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 669. [2021-06-05 22:09:05,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 668 states have (on average 3.179640718562874) internal successors, (2124), 668 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:05,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 2124 transitions. [2021-06-05 22:09:05,330 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 2124 transitions. Word has length 23 [2021-06-05 22:09:05,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:05,330 INFO L482 AbstractCegarLoop]: Abstraction has 669 states and 2124 transitions. [2021-06-05 22:09:05,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:05,331 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 2124 transitions. [2021-06-05 22:09:05,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:09:05,331 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:05,332 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:05,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3305,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:05,533 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:05,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:05,533 INFO L82 PathProgramCache]: Analyzing trace with hash 2094348922, now seen corresponding path program 219 times [2021-06-05 22:09:05,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:05,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035152940] [2021-06-05 22:09:05,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:05,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:05,695 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:05,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:05,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035152940] [2021-06-05 22:09:05,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035152940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:05,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129768269] [2021-06-05 22:09:05,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:05,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:09:05,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:05,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:09:05,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:05,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:09:05,863 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:05,930 INFO L628 ElimStorePlain]: treesize reduction 72, result has 54.7 percent of original size [2021-06-05 22:09:05,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:05,934 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:05,974 INFO L628 ElimStorePlain]: treesize reduction 31, result has 62.7 percent of original size [2021-06-05 22:09:05,975 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-05 22:09:05,975 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:162, output treesize:42 [2021-06-05 22:09:06,298 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_102, ends_with_2, v_prenex_104, v_prenex_103, v_prenex_105], 1=[ends_with_6]} [2021-06-05 22:09:06,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:06,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:06,306 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:06,307 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:06,436 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-06-05 22:09:06,436 INFO L628 ElimStorePlain]: treesize reduction 126, result has 51.4 percent of original size [2021-06-05 22:09:06,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:09:06,440 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:06,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:09:06,444 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:06,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:06,498 INFO L518 ElimStorePlain]: Eliminatee v_prenex_104 vanished before elimination [2021-06-05 22:09:06,498 INFO L518 ElimStorePlain]: Eliminatee v_prenex_103 vanished before elimination [2021-06-05 22:09:06,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:06,502 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:06,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:06,505 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:06,601 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.2 percent of original size [2021-06-05 22:09:06,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:09:06,605 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:06,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:06,608 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:06,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:06,611 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:06,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:06,614 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:06,680 INFO L628 ElimStorePlain]: treesize reduction 22, result has 78.6 percent of original size [2021-06-05 22:09:06,682 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:09:06,682 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 8 variables, input treesize:298, output treesize:35 [2021-06-05 22:09:06,755 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:09:06,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129768269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:06,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:06,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-06-05 22:09:06,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071652701] [2021-06-05 22:09:06,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:09:06,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:06,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:09:06,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:09:06,756 INFO L87 Difference]: Start difference. First operand 669 states and 2124 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:09,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:09,806 INFO L93 Difference]: Finished difference Result 1532 states and 4667 transitions. [2021-06-05 22:09:09,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 22:09:09,806 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:09:09,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:09,808 INFO L225 Difference]: With dead ends: 1532 [2021-06-05 22:09:09,808 INFO L226 Difference]: Without dead ends: 1355 [2021-06-05 22:09:09,809 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1069 ImplicationChecksByTransitivity, 2701.1ms TimeCoverageRelationStatistics Valid=534, Invalid=3126, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 22:09:09,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2021-06-05 22:09:09,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 758. [2021-06-05 22:09:09,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.248348745046235) internal successors, (2459), 757 states have internal predecessors, (2459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:09,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2459 transitions. [2021-06-05 22:09:09,819 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2459 transitions. Word has length 23 [2021-06-05 22:09:09,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:09,819 INFO L482 AbstractCegarLoop]: Abstraction has 758 states and 2459 transitions. [2021-06-05 22:09:09,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:09,819 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2459 transitions. [2021-06-05 22:09:09,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:09:09,820 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:09,820 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:10,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3363,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:10,030 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:10,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:10,030 INFO L82 PathProgramCache]: Analyzing trace with hash -2146347564, now seen corresponding path program 220 times [2021-06-05 22:09:10,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:10,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840742891] [2021-06-05 22:09:10,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:10,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:10,141 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:10,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:10,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840742891] [2021-06-05 22:09:10,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840742891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:10,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789892917] [2021-06-05 22:09:10,141 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:10,242 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:09:10,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:10,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:09:10,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:10,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:09:10,397 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:10,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:10,400 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:10,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:09:10,404 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:10,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:10,408 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:10,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:10,412 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:10,414 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:10,415 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:10,417 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:10,418 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:10,420 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:10,421 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:10,504 INFO L628 ElimStorePlain]: treesize reduction 27, result has 78.6 percent of original size [2021-06-05 22:09:10,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:09:10,507 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:10,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:10,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:10,550 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:10,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:09:10,553 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:10,619 INFO L628 ElimStorePlain]: treesize reduction 3, result has 96.6 percent of original size [2021-06-05 22:09:10,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:10,623 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:10,670 INFO L628 ElimStorePlain]: treesize reduction 21, result has 74.4 percent of original size [2021-06-05 22:09:10,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:09:10,673 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:231, output treesize:45 [2021-06-05 22:09:10,768 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:09:10,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789892917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:10,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:10,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 22:09:10,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961334578] [2021-06-05 22:09:10,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:09:10,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:10,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:09:10,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:09:10,769 INFO L87 Difference]: Start difference. First operand 758 states and 2459 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:11,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:11,239 INFO L93 Difference]: Finished difference Result 1012 states and 3166 transitions. [2021-06-05 22:09:11,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:09:11,239 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:09:11,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:11,241 INFO L225 Difference]: With dead ends: 1012 [2021-06-05 22:09:11,241 INFO L226 Difference]: Without dead ends: 967 [2021-06-05 22:09:11,241 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 446.2ms TimeCoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:09:11,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2021-06-05 22:09:11,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 716. [2021-06-05 22:09:11,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 3.1706293706293707) internal successors, (2267), 715 states have internal predecessors, (2267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:11,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 2267 transitions. [2021-06-05 22:09:11,248 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 2267 transitions. Word has length 23 [2021-06-05 22:09:11,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:11,248 INFO L482 AbstractCegarLoop]: Abstraction has 716 states and 2267 transitions. [2021-06-05 22:09:11,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:11,248 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 2267 transitions. [2021-06-05 22:09:11,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:09:11,249 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:11,249 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:11,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3414 [2021-06-05 22:09:11,453 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:11,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:11,453 INFO L82 PathProgramCache]: Analyzing trace with hash -554888474, now seen corresponding path program 221 times [2021-06-05 22:09:11,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:11,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060543952] [2021-06-05 22:09:11,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:11,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:11,601 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:11,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:11,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060543952] [2021-06-05 22:09:11,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060543952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:11,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016472267] [2021-06-05 22:09:11,601 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:11,696 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:09:11,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:11,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 22:09:11,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:11,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:09:11,773 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:11,885 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-06-05 22:09:11,885 INFO L628 ElimStorePlain]: treesize reduction 6, result has 94.2 percent of original size [2021-06-05 22:09:11,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:11,890 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:11,976 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.9 percent of original size [2021-06-05 22:09:11,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:11,980 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:12,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:12,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:09:12,018 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:12,071 INFO L628 ElimStorePlain]: treesize reduction 21, result has 75.6 percent of original size [2021-06-05 22:09:12,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 22:09:12,073 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:107, output treesize:60 [2021-06-05 22:09:12,483 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_112, ends_with_10], 3=[ends_with_2]} [2021-06-05 22:09:12,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:09:12,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:12,494 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:12,495 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:12,500 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:12,501 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:12,842 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2021-06-05 22:09:12,842 INFO L628 ElimStorePlain]: treesize reduction 220, result has 53.8 percent of original size [2021-06-05 22:09:12,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:12,848 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:12,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:09:12,852 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:12,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:09:12,856 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:12,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:09:12,860 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:12,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:12,864 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:12,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:12,869 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:12,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:12,873 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:13,058 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2021-06-05 22:09:13,059 INFO L628 ElimStorePlain]: treesize reduction 28, result has 87.9 percent of original size [2021-06-05 22:09:13,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:13,063 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:13,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:13,067 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:13,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:09:13,071 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:13,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:13,075 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:13,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:13,082 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:13,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:13,087 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:13,222 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-06-05 22:09:13,222 INFO L628 ElimStorePlain]: treesize reduction 26, result has 85.6 percent of original size [2021-06-05 22:09:13,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 22:09:13,227 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 6 variables, input treesize:554, output treesize:93 [2021-06-05 22:09:13,392 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:09:13,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016472267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:13,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:13,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 22:09:13,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799388772] [2021-06-05 22:09:13,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:09:13,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:13,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:09:13,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:09:13,393 INFO L87 Difference]: Start difference. First operand 716 states and 2267 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:14,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:14,426 INFO L93 Difference]: Finished difference Result 1121 states and 3478 transitions. [2021-06-05 22:09:14,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:09:14,426 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:09:14,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:14,428 INFO L225 Difference]: With dead ends: 1121 [2021-06-05 22:09:14,428 INFO L226 Difference]: Without dead ends: 1031 [2021-06-05 22:09:14,428 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1059.2ms TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:09:14,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1031 states. [2021-06-05 22:09:14,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1031 to 726. [2021-06-05 22:09:14,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 725 states have (on average 3.169655172413793) internal successors, (2298), 725 states have internal predecessors, (2298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:14,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 2298 transitions. [2021-06-05 22:09:14,436 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 2298 transitions. Word has length 23 [2021-06-05 22:09:14,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:14,436 INFO L482 AbstractCegarLoop]: Abstraction has 726 states and 2298 transitions. [2021-06-05 22:09:14,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:14,436 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 2298 transitions. [2021-06-05 22:09:14,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:09:14,436 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:14,436 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:14,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3448,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:14,637 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:14,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:14,637 INFO L82 PathProgramCache]: Analyzing trace with hash 620602170, now seen corresponding path program 222 times [2021-06-05 22:09:14,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:14,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292971378] [2021-06-05 22:09:14,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:14,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:14,775 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:14,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:14,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292971378] [2021-06-05 22:09:14,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292971378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:14,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853998530] [2021-06-05 22:09:14,776 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:14,870 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:09:14,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:14,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 22:09:14,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:14,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:14,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:15,007 INFO L628 ElimStorePlain]: treesize reduction 28, result has 76.3 percent of original size [2021-06-05 22:09:15,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:15,011 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:15,060 INFO L628 ElimStorePlain]: treesize reduction 22, result has 74.4 percent of original size [2021-06-05 22:09:15,060 INFO L518 ElimStorePlain]: Eliminatee v_prenex_114 vanished before elimination [2021-06-05 22:09:15,060 INFO L518 ElimStorePlain]: Eliminatee ends_with_10 vanished before elimination [2021-06-05 22:09:15,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:09:15,064 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:15,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:15,087 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:09:15,087 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:122, output treesize:61 [2021-06-05 22:09:15,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:09:15,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:15,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:15,217 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:15,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:15,221 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:15,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:15,234 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:15,237 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:15,237 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:15,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:15,241 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:15,244 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:15,245 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:15,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:09:15,249 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:15,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:15,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:15,321 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:15,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:15,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:15,391 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:15,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:09:15,395 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:15,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:15,398 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:15,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:09:15,402 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:15,517 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-06-05 22:09:15,518 INFO L628 ElimStorePlain]: treesize reduction 4, result has 97.5 percent of original size [2021-06-05 22:09:15,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:09:15,521 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:15,613 INFO L628 ElimStorePlain]: treesize reduction 28, result has 81.5 percent of original size [2021-06-05 22:09:15,616 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:09:15,616 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 5 variables, input treesize:269, output treesize:98 [2021-06-05 22:09:15,774 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:09:15,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853998530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:15,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:15,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 22:09:15,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258695232] [2021-06-05 22:09:15,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:09:15,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:15,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:09:15,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:09:15,775 INFO L87 Difference]: Start difference. First operand 726 states and 2298 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:16,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:16,573 INFO L93 Difference]: Finished difference Result 1248 states and 3824 transitions. [2021-06-05 22:09:16,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:09:16,573 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:09:16,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:16,575 INFO L225 Difference]: With dead ends: 1248 [2021-06-05 22:09:16,575 INFO L226 Difference]: Without dead ends: 1158 [2021-06-05 22:09:16,575 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 832.8ms TimeCoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:09:16,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2021-06-05 22:09:16,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 736. [2021-06-05 22:09:16,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 735 states have (on average 3.182312925170068) internal successors, (2339), 735 states have internal predecessors, (2339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:16,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 2339 transitions. [2021-06-05 22:09:16,583 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 2339 transitions. Word has length 23 [2021-06-05 22:09:16,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:16,583 INFO L482 AbstractCegarLoop]: Abstraction has 736 states and 2339 transitions. [2021-06-05 22:09:16,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:16,583 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 2339 transitions. [2021-06-05 22:09:16,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:09:16,584 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:16,584 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:16,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3545 [2021-06-05 22:09:16,785 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:16,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:16,785 INFO L82 PathProgramCache]: Analyzing trace with hash -2060798392, now seen corresponding path program 223 times [2021-06-05 22:09:16,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:16,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235951205] [2021-06-05 22:09:16,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:16,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:16,985 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:16,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:16,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235951205] [2021-06-05 22:09:16,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235951205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:16,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658267145] [2021-06-05 22:09:16,986 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:17,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:17,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:09:17,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:17,506 INFO L446 ElimStorePlain]: Different costs {0=[ends_with_6, v_prenex_119], 1=[ends_with_2]} [2021-06-05 22:09:17,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:09:17,511 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:17,514 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:17,514 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:17,594 INFO L628 ElimStorePlain]: treesize reduction 180, result has 28.3 percent of original size [2021-06-05 22:09:17,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:17,598 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:17,648 INFO L628 ElimStorePlain]: treesize reduction 24, result has 64.2 percent of original size [2021-06-05 22:09:17,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:17,652 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:17,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:09:17,656 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:17,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:17,675 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:09:17,675 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:278, output treesize:20 [2021-06-05 22:09:17,749 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:09:17,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658267145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:17,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:17,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 22:09:17,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667110545] [2021-06-05 22:09:17,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:09:17,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:17,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:09:17,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:09:17,750 INFO L87 Difference]: Start difference. First operand 736 states and 2339 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:19,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:19,754 INFO L93 Difference]: Finished difference Result 1116 states and 3361 transitions. [2021-06-05 22:09:19,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 22:09:19,754 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:09:19,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:19,755 INFO L225 Difference]: With dead ends: 1116 [2021-06-05 22:09:19,755 INFO L226 Difference]: Without dead ends: 1050 [2021-06-05 22:09:19,755 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 1685.0ms TimeCoverageRelationStatistics Valid=254, Invalid=2196, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 22:09:19,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2021-06-05 22:09:19,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 710. [2021-06-05 22:09:19,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 709 states have (on average 3.170662905500705) internal successors, (2248), 709 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:19,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 2248 transitions. [2021-06-05 22:09:19,763 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 2248 transitions. Word has length 23 [2021-06-05 22:09:19,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:19,763 INFO L482 AbstractCegarLoop]: Abstraction has 710 states and 2248 transitions. [2021-06-05 22:09:19,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:19,763 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 2248 transitions. [2021-06-05 22:09:19,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:09:19,764 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:19,764 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:19,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3582 [2021-06-05 22:09:19,964 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:19,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:19,965 INFO L82 PathProgramCache]: Analyzing trace with hash -973949894, now seen corresponding path program 224 times [2021-06-05 22:09:19,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:19,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66717978] [2021-06-05 22:09:19,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:19,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:20,117 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:20,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:20,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66717978] [2021-06-05 22:09:20,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66717978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:20,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055107443] [2021-06-05 22:09:20,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:20,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:09:20,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:20,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:09:20,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:20,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:09:20,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:20,332 INFO L628 ElimStorePlain]: treesize reduction 30, result has 68.8 percent of original size [2021-06-05 22:09:20,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:20,335 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:20,367 INFO L628 ElimStorePlain]: treesize reduction 24, result has 61.3 percent of original size [2021-06-05 22:09:20,367 INFO L518 ElimStorePlain]: Eliminatee v_prenex_120 vanished before elimination [2021-06-05 22:09:20,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-05 22:09:20,368 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:99, output treesize:33 [2021-06-05 22:09:20,548 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_122, v_prenex_124, v_prenex_123, ends_with_10], 1=[ends_with_2]} [2021-06-05 22:09:20,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:09:20,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:20,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:09:20,556 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:20,713 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-06-05 22:09:20,713 INFO L628 ElimStorePlain]: treesize reduction 79, result has 69.0 percent of original size [2021-06-05 22:09:20,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:09:20,717 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:20,856 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-06-05 22:09:20,856 INFO L628 ElimStorePlain]: treesize reduction 4, result has 97.7 percent of original size [2021-06-05 22:09:20,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:20,860 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:20,976 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-06-05 22:09:20,977 INFO L628 ElimStorePlain]: treesize reduction 25, result has 84.8 percent of original size [2021-06-05 22:09:20,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:20,981 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:20,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:20,984 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:21,090 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-06-05 22:09:21,090 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.2 percent of original size [2021-06-05 22:09:21,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:21,094 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:21,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:21,097 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:21,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:21,101 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:21,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:09:21,106 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:21,182 INFO L628 ElimStorePlain]: treesize reduction 25, result has 78.4 percent of original size [2021-06-05 22:09:21,184 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 5 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:09:21,184 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 7 variables, input treesize:261, output treesize:57 [2021-06-05 22:09:21,284 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:09:21,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055107443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:21,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:21,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 22:09:21,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437404792] [2021-06-05 22:09:21,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:09:21,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:21,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:09:21,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:09:21,285 INFO L87 Difference]: Start difference. First operand 710 states and 2248 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:22,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:22,226 INFO L93 Difference]: Finished difference Result 1008 states and 3166 transitions. [2021-06-05 22:09:22,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:09:22,226 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:09:22,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:22,227 INFO L225 Difference]: With dead ends: 1008 [2021-06-05 22:09:22,227 INFO L226 Difference]: Without dead ends: 963 [2021-06-05 22:09:22,228 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 879.4ms TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:09:22,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2021-06-05 22:09:22,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 729. [2021-06-05 22:09:22,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 728 states have (on average 3.168956043956044) internal successors, (2307), 728 states have internal predecessors, (2307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:22,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 2307 transitions. [2021-06-05 22:09:22,235 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 2307 transitions. Word has length 23 [2021-06-05 22:09:22,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:22,235 INFO L482 AbstractCegarLoop]: Abstraction has 729 states and 2307 transitions. [2021-06-05 22:09:22,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:22,235 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 2307 transitions. [2021-06-05 22:09:22,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:09:22,236 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:22,236 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:22,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3670 [2021-06-05 22:09:22,436 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:22,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:22,437 INFO L82 PathProgramCache]: Analyzing trace with hash -25680630, now seen corresponding path program 225 times [2021-06-05 22:09:22,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:22,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741018210] [2021-06-05 22:09:22,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:22,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:22,597 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:22,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:22,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741018210] [2021-06-05 22:09:22,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741018210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:22,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62063387] [2021-06-05 22:09:22,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:22,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:09:22,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:22,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 22:09:22,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:22,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:09:22,770 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:22,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:09:22,774 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:22,841 INFO L628 ElimStorePlain]: treesize reduction 26, result has 76.6 percent of original size [2021-06-05 22:09:22,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:22,844 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:22,893 INFO L628 ElimStorePlain]: treesize reduction 19, result has 76.5 percent of original size [2021-06-05 22:09:22,893 INFO L518 ElimStorePlain]: Eliminatee ends_with_10 vanished before elimination [2021-06-05 22:09:22,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:22,896 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:22,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:22,920 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:09:22,920 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:117, output treesize:58 [2021-06-05 22:09:23,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:09:23,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:23,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:23,073 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:23,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:09:23,077 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:23,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:09:23,082 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:23,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:23,086 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:23,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:23,090 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:23,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:23,094 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:23,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:23,098 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:23,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:23,103 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:23,106 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:23,106 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:23,250 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-06-05 22:09:23,251 INFO L628 ElimStorePlain]: treesize reduction 99, result has 64.0 percent of original size [2021-06-05 22:09:23,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:09:23,255 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:23,366 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2021-06-05 22:09:23,367 INFO L628 ElimStorePlain]: treesize reduction 33, result has 80.9 percent of original size [2021-06-05 22:09:23,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:09:23,371 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:23,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:23,374 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:23,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:23,377 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:23,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:09:23,381 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:23,472 INFO L628 ElimStorePlain]: treesize reduction 3, result has 97.6 percent of original size [2021-06-05 22:09:23,473 INFO L518 ElimStorePlain]: Eliminatee v_prenex_129 vanished before elimination [2021-06-05 22:09:23,474 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:09:23,474 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 5 variables, input treesize:341, output treesize:98 [2021-06-05 22:09:23,619 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:09:23,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62063387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:23,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:23,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 22:09:23,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64681072] [2021-06-05 22:09:23,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:09:23,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:23,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:09:23,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:09:23,620 INFO L87 Difference]: Start difference. First operand 729 states and 2307 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:24,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:24,506 INFO L93 Difference]: Finished difference Result 1261 states and 3863 transitions. [2021-06-05 22:09:24,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:09:24,506 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:09:24,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:24,508 INFO L225 Difference]: With dead ends: 1261 [2021-06-05 22:09:24,508 INFO L226 Difference]: Without dead ends: 1171 [2021-06-05 22:09:24,508 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 925.6ms TimeCoverageRelationStatistics Valid=159, Invalid=833, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:09:24,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2021-06-05 22:09:24,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 739. [2021-06-05 22:09:24,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 738 states have (on average 3.1815718157181574) internal successors, (2348), 738 states have internal predecessors, (2348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:24,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 2348 transitions. [2021-06-05 22:09:24,516 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 2348 transitions. Word has length 23 [2021-06-05 22:09:24,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:24,516 INFO L482 AbstractCegarLoop]: Abstraction has 739 states and 2348 transitions. [2021-06-05 22:09:24,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:24,516 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 2348 transitions. [2021-06-05 22:09:24,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:09:24,517 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:24,517 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:24,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3713,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:24,718 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:24,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:24,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1587886104, now seen corresponding path program 226 times [2021-06-05 22:09:24,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:24,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614664333] [2021-06-05 22:09:24,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:24,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:24,936 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:09:24,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:24,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614664333] [2021-06-05 22:09:24,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614664333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:24,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77551717] [2021-06-05 22:09:24,936 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:25,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:09:25,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:25,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 22:09:25,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:25,335 INFO L446 ElimStorePlain]: Different costs {0=[ends_with_2, v_prenex_131, v_prenex_130], 1=[ends_with_6]} [2021-06-05 22:09:25,338 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:25,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:25,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:25,343 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:25,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:25,347 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:25,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:25,350 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:25,353 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:25,354 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:25,356 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:25,357 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:25,432 INFO L628 ElimStorePlain]: treesize reduction 117, result has 38.4 percent of original size [2021-06-05 22:09:25,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:09:25,435 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:25,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:25,464 INFO L518 ElimStorePlain]: Eliminatee v_prenex_130 vanished before elimination [2021-06-05 22:09:25,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:25,467 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:25,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:09:25,470 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:25,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:25,473 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:25,518 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.3 percent of original size [2021-06-05 22:09:25,519 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:09:25,519 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:293, output treesize:32 [2021-06-05 22:09:25,585 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:09:25,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77551717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:25,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:25,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-05 22:09:25,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404564438] [2021-06-05 22:09:25,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:09:25,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:25,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:09:25,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:09:25,585 INFO L87 Difference]: Start difference. First operand 739 states and 2348 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:26,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:26,446 INFO L93 Difference]: Finished difference Result 1121 states and 3462 transitions. [2021-06-05 22:09:26,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:09:26,446 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:09:26,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:26,447 INFO L225 Difference]: With dead ends: 1121 [2021-06-05 22:09:26,447 INFO L226 Difference]: Without dead ends: 1067 [2021-06-05 22:09:26,448 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 966.1ms TimeCoverageRelationStatistics Valid=137, Invalid=855, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:09:26,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2021-06-05 22:09:26,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 751. [2021-06-05 22:09:26,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 750 states have (on average 3.1973333333333334) internal successors, (2398), 750 states have internal predecessors, (2398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:26,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 2398 transitions. [2021-06-05 22:09:26,455 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 2398 transitions. Word has length 23 [2021-06-05 22:09:26,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:26,455 INFO L482 AbstractCegarLoop]: Abstraction has 751 states and 2398 transitions. [2021-06-05 22:09:26,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:26,455 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 2398 transitions. [2021-06-05 22:09:26,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:09:26,456 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:26,456 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:26,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3750,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:26,657 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:26,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:26,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1571783644, now seen corresponding path program 227 times [2021-06-05 22:09:26,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:26,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430875792] [2021-06-05 22:09:26,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:26,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:26,913 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:26,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:26,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430875792] [2021-06-05 22:09:26,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430875792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:26,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815739876] [2021-06-05 22:09:26,914 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:27,009 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:09:27,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:27,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:09:27,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:27,279 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_133, v_prenex_132, ends_with_6], 1=[ends_with_2]} [2021-06-05 22:09:27,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:27,283 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:27,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:27,288 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:27,375 INFO L628 ElimStorePlain]: treesize reduction 110, result has 47.4 percent of original size [2021-06-05 22:09:27,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:27,378 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:27,433 INFO L628 ElimStorePlain]: treesize reduction 24, result has 74.7 percent of original size [2021-06-05 22:09:27,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:09:27,437 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:27,471 INFO L628 ElimStorePlain]: treesize reduction 25, result has 63.2 percent of original size [2021-06-05 22:09:27,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:27,475 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:27,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:09:27,477 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:27,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:27,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:09:27,492 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:217, output treesize:20 [2021-06-05 22:09:27,553 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:09:27,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815739876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:27,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:27,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 22:09:27,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481321196] [2021-06-05 22:09:27,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:09:27,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:27,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:09:27,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:09:27,554 INFO L87 Difference]: Start difference. First operand 751 states and 2398 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:30,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:30,424 INFO L93 Difference]: Finished difference Result 1322 states and 4005 transitions. [2021-06-05 22:09:30,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 22:09:30,424 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:09:30,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:30,426 INFO L225 Difference]: With dead ends: 1322 [2021-06-05 22:09:30,426 INFO L226 Difference]: Without dead ends: 1229 [2021-06-05 22:09:30,426 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 838 ImplicationChecksByTransitivity, 2373.2ms TimeCoverageRelationStatistics Valid=432, Invalid=3108, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 22:09:30,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1229 states. [2021-06-05 22:09:30,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1229 to 750. [2021-06-05 22:09:30,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 749 states have (on average 3.184245660881175) internal successors, (2385), 749 states have internal predecessors, (2385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:30,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2385 transitions. [2021-06-05 22:09:30,434 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2385 transitions. Word has length 23 [2021-06-05 22:09:30,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:30,434 INFO L482 AbstractCegarLoop]: Abstraction has 750 states and 2385 transitions. [2021-06-05 22:09:30,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:30,434 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2385 transitions. [2021-06-05 22:09:30,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:09:30,435 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:30,435 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:30,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3798,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:30,636 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:30,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:30,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1840314058, now seen corresponding path program 228 times [2021-06-05 22:09:30,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:30,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007901280] [2021-06-05 22:09:30,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:30,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:30,858 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:30,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:30,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007901280] [2021-06-05 22:09:30,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007901280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:30,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407158028] [2021-06-05 22:09:30,858 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:30,952 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:09:30,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:30,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 22:09:30,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:31,425 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_134, ends_with_6], 1=[ends_with_2]} [2021-06-05 22:09:31,428 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:31,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:31,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:09:31,433 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:31,436 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:31,437 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:31,574 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-06-05 22:09:31,574 INFO L628 ElimStorePlain]: treesize reduction 187, result has 43.7 percent of original size [2021-06-05 22:09:31,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:31,578 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:31,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:31,581 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:31,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:09:31,585 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:31,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:09:31,590 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:31,695 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-06-05 22:09:31,696 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.5 percent of original size [2021-06-05 22:09:31,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:31,699 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:31,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:31,703 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:31,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:09:31,706 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:31,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:31,709 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:31,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:31,712 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:31,800 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.1 percent of original size [2021-06-05 22:09:31,801 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:09:31,802 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 4 variables, input treesize:395, output treesize:65 [2021-06-05 22:09:31,926 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:09:31,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407158028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:31,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:31,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 22:09:31,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907666803] [2021-06-05 22:09:31,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:09:31,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:31,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:09:31,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:09:31,927 INFO L87 Difference]: Start difference. First operand 750 states and 2385 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:33,907 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2021-06-05 22:09:35,157 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2021-06-05 22:09:35,848 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2021-06-05 22:09:36,471 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 57 [2021-06-05 22:09:36,618 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2021-06-05 22:09:37,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:37,264 INFO L93 Difference]: Finished difference Result 1854 states and 5388 transitions. [2021-06-05 22:09:37,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 22:09:37,265 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:09:37,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:37,267 INFO L225 Difference]: With dead ends: 1854 [2021-06-05 22:09:37,267 INFO L226 Difference]: Without dead ends: 1620 [2021-06-05 22:09:37,267 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1586 ImplicationChecksByTransitivity, 4510.1ms TimeCoverageRelationStatistics Valid=659, Invalid=5041, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 22:09:37,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1620 states. [2021-06-05 22:09:37,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1620 to 812. [2021-06-05 22:09:37,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 811 states have (on average 3.256473489519112) internal successors, (2641), 811 states have internal predecessors, (2641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:37,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 2641 transitions. [2021-06-05 22:09:37,279 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 2641 transitions. Word has length 23 [2021-06-05 22:09:37,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:37,279 INFO L482 AbstractCegarLoop]: Abstraction has 812 states and 2641 transitions. [2021-06-05 22:09:37,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:37,279 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 2641 transitions. [2021-06-05 22:09:37,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:09:37,280 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:37,280 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:37,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3835 [2021-06-05 22:09:37,480 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:37,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:37,480 INFO L82 PathProgramCache]: Analyzing trace with hash -335500874, now seen corresponding path program 229 times [2021-06-05 22:09:37,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:37,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950592383] [2021-06-05 22:09:37,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:37,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:37,673 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:37,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:37,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950592383] [2021-06-05 22:09:37,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950592383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:37,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617902644] [2021-06-05 22:09:37,673 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:37,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:37,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:09:37,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:38,227 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_135, ends_with_6], 1=[ends_with_2]} [2021-06-05 22:09:38,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:09:38,231 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:38,234 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:38,234 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:38,304 INFO L628 ElimStorePlain]: treesize reduction 239, result has 22.9 percent of original size [2021-06-05 22:09:38,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:38,307 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:38,342 INFO L628 ElimStorePlain]: treesize reduction 24, result has 64.2 percent of original size [2021-06-05 22:09:38,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:09:38,345 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:38,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:38,348 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:38,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:38,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:09:38,362 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:337, output treesize:20 [2021-06-05 22:09:38,415 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:09:38,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617902644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:38,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:38,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 22:09:38,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095155471] [2021-06-05 22:09:38,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:09:38,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:38,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:09:38,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:09:38,416 INFO L87 Difference]: Start difference. First operand 812 states and 2641 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:39,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:39,840 INFO L93 Difference]: Finished difference Result 1104 states and 3428 transitions. [2021-06-05 22:09:39,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:09:39,841 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:09:39,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:39,842 INFO L225 Difference]: With dead ends: 1104 [2021-06-05 22:09:39,842 INFO L226 Difference]: Without dead ends: 1044 [2021-06-05 22:09:39,842 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1211.5ms TimeCoverageRelationStatistics Valid=209, Invalid=1597, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:09:39,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2021-06-05 22:09:39,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 828. [2021-06-05 22:09:39,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 827 states have (on average 3.259975816203144) internal successors, (2696), 827 states have internal predecessors, (2696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:39,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 2696 transitions. [2021-06-05 22:09:39,851 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 2696 transitions. Word has length 23 [2021-06-05 22:09:39,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:39,851 INFO L482 AbstractCegarLoop]: Abstraction has 828 states and 2696 transitions. [2021-06-05 22:09:39,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:39,851 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 2696 transitions. [2021-06-05 22:09:39,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:09:39,852 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:39,852 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:40,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3953 [2021-06-05 22:09:40,052 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:40,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:40,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1570469962, now seen corresponding path program 230 times [2021-06-05 22:09:40,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:40,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712466761] [2021-06-05 22:09:40,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:40,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:40,131 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:09:40,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:40,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712466761] [2021-06-05 22:09:40,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712466761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:40,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137227545] [2021-06-05 22:09:40,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:40,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:09:40,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:40,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 22:09:40,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:40,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:09:40,337 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:40,420 INFO L628 ElimStorePlain]: treesize reduction 28, result has 78.8 percent of original size [2021-06-05 22:09:40,421 INFO L518 ElimStorePlain]: Eliminatee v_prenex_137 vanished before elimination [2021-06-05 22:09:40,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:09:40,424 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:40,500 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.0 percent of original size [2021-06-05 22:09:40,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:40,504 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:40,562 INFO L628 ElimStorePlain]: treesize reduction 22, result has 76.3 percent of original size [2021-06-05 22:09:40,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:40,565 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:40,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:40,594 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 5 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 22:09:40,594 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:135, output treesize:59 [2021-06-05 22:09:41,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:41,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:41,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:09:41,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:41,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:41,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:41,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:09:41,031 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:41,034 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:41,035 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:41,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:41,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:09:41,042 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:41,158 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-06-05 22:09:41,158 INFO L628 ElimStorePlain]: treesize reduction 104, result has 50.0 percent of original size [2021-06-05 22:09:41,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:41,162 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:41,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:41,165 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:41,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:41,228 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:09:41,228 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:309, output treesize:70 [2021-06-05 22:09:41,370 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:09:41,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137227545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:41,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:41,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:09:41,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449281502] [2021-06-05 22:09:41,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:09:41,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:41,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:09:41,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:09:41,371 INFO L87 Difference]: Start difference. First operand 828 states and 2696 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:42,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:42,904 INFO L93 Difference]: Finished difference Result 1373 states and 4181 transitions. [2021-06-05 22:09:42,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:09:42,904 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:09:42,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:42,906 INFO L225 Difference]: With dead ends: 1373 [2021-06-05 22:09:42,906 INFO L226 Difference]: Without dead ends: 1225 [2021-06-05 22:09:42,906 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 1241.7ms TimeCoverageRelationStatistics Valid=182, Invalid=1378, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:09:42,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2021-06-05 22:09:42,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 850. [2021-06-05 22:09:42,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 849 states have (on average 3.270906949352179) internal successors, (2777), 849 states have internal predecessors, (2777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:42,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 2777 transitions. [2021-06-05 22:09:42,915 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 2777 transitions. Word has length 23 [2021-06-05 22:09:42,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:42,915 INFO L482 AbstractCegarLoop]: Abstraction has 850 states and 2777 transitions. [2021-06-05 22:09:42,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:42,915 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 2777 transitions. [2021-06-05 22:09:42,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:09:42,916 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:42,916 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:43,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4049,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:43,117 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:43,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:43,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1231172060, now seen corresponding path program 231 times [2021-06-05 22:09:43,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:43,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357857444] [2021-06-05 22:09:43,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:43,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:43,253 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:09:43,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:43,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357857444] [2021-06-05 22:09:43,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357857444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:43,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329990267] [2021-06-05 22:09:43,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:43,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:09:43,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:43,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 22:09:43,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:43,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:43,436 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:43,439 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:43,439 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:43,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:09:43,443 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:43,523 INFO L628 ElimStorePlain]: treesize reduction 10, result has 90.9 percent of original size [2021-06-05 22:09:43,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:09:43,526 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:43,574 INFO L628 ElimStorePlain]: treesize reduction 41, result has 57.7 percent of original size [2021-06-05 22:09:43,574 INFO L518 ElimStorePlain]: Eliminatee ends_with_10 vanished before elimination [2021-06-05 22:09:43,574 INFO L518 ElimStorePlain]: Eliminatee v_prenex_142 vanished before elimination [2021-06-05 22:09:43,576 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 22:09:43,576 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:144, output treesize:48 [2021-06-05 22:09:43,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:43,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:43,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:09:43,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:43,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:43,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:43,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:09:43,880 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:43,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:43,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:43,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:09:43,885 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:43,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:43,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:43,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:09:43,888 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:43,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:43,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:09:43,892 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:43,946 INFO L628 ElimStorePlain]: treesize reduction 45, result has 55.9 percent of original size [2021-06-05 22:09:43,947 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:09:43,947 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:178, output treesize:41 [2021-06-05 22:09:44,024 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:09:44,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329990267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:44,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:44,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 22:09:44,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423214131] [2021-06-05 22:09:44,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:09:44,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:44,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:09:44,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:09:44,025 INFO L87 Difference]: Start difference. First operand 850 states and 2777 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:45,084 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2021-06-05 22:09:45,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:45,619 INFO L93 Difference]: Finished difference Result 1420 states and 4421 transitions. [2021-06-05 22:09:45,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:09:45,619 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:09:45,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:45,621 INFO L225 Difference]: With dead ends: 1420 [2021-06-05 22:09:45,621 INFO L226 Difference]: Without dead ends: 1359 [2021-06-05 22:09:45,621 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 1611.1ms TimeCoverageRelationStatistics Valid=226, Invalid=964, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:09:45,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1359 states. [2021-06-05 22:09:45,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1359 to 871. [2021-06-05 22:09:45,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 3.264367816091954) internal successors, (2840), 870 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:45,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2840 transitions. [2021-06-05 22:09:45,631 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2840 transitions. Word has length 23 [2021-06-05 22:09:45,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:45,631 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 2840 transitions. [2021-06-05 22:09:45,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:45,631 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2840 transitions. [2021-06-05 22:09:45,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:09:45,632 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:45,632 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:45,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4186 [2021-06-05 22:09:45,832 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:45,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:45,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1298345444, now seen corresponding path program 232 times [2021-06-05 22:09:45,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:45,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025464665] [2021-06-05 22:09:45,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:45,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:45,968 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:09:45,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:45,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025464665] [2021-06-05 22:09:45,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025464665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:45,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569491224] [2021-06-05 22:09:45,968 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:46,071 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:09:46,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:46,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 22:09:46,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:46,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:09:46,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:46,204 INFO L628 ElimStorePlain]: treesize reduction 74, result has 47.5 percent of original size [2021-06-05 22:09:46,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:09:46,207 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:46,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:46,210 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:46,255 INFO L628 ElimStorePlain]: treesize reduction 4, result has 93.3 percent of original size [2021-06-05 22:09:46,255 INFO L518 ElimStorePlain]: Eliminatee v_prenex_147 vanished before elimination [2021-06-05 22:09:46,255 INFO L518 ElimStorePlain]: Eliminatee ends_with_10 vanished before elimination [2021-06-05 22:09:46,257 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 22:09:46,257 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:144, output treesize:48 [2021-06-05 22:09:46,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:46,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:46,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:09:46,796 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:46,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:46,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:46,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:09:46,802 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:46,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:46,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:46,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:09:46,808 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:46,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:46,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:09:46,813 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:46,939 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2021-06-05 22:09:46,940 INFO L628 ElimStorePlain]: treesize reduction 105, result has 54.1 percent of original size [2021-06-05 22:09:46,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:46,944 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:46,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:46,947 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:47,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:47,002 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 22:09:47,002 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:301, output treesize:80 [2021-06-05 22:09:47,147 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:09:47,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569491224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:47,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:47,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-05 22:09:47,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597740986] [2021-06-05 22:09:47,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:09:47,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:47,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:09:47,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:09:47,148 INFO L87 Difference]: Start difference. First operand 871 states and 2840 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:49,821 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2021-06-05 22:09:49,948 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-06-05 22:09:50,573 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2021-06-05 22:09:50,713 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2021-06-05 22:09:50,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:50,747 INFO L93 Difference]: Finished difference Result 1820 states and 5668 transitions. [2021-06-05 22:09:50,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 22:09:50,748 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:09:50,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:50,750 INFO L225 Difference]: With dead ends: 1820 [2021-06-05 22:09:50,750 INFO L226 Difference]: Without dead ends: 1637 [2021-06-05 22:09:50,750 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 3469.5ms TimeCoverageRelationStatistics Valid=624, Invalid=2916, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 22:09:50,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-06-05 22:09:50,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 881. [2021-06-05 22:09:50,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 881 states, 880 states have (on average 3.2738636363636364) internal successors, (2881), 880 states have internal predecessors, (2881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:50,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 2881 transitions. [2021-06-05 22:09:50,761 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 2881 transitions. Word has length 23 [2021-06-05 22:09:50,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:50,761 INFO L482 AbstractCegarLoop]: Abstraction has 881 states and 2881 transitions. [2021-06-05 22:09:50,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:50,761 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 2881 transitions. [2021-06-05 22:09:50,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:09:50,762 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:50,762 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:50,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4249,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:50,963 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:50,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:50,963 INFO L82 PathProgramCache]: Analyzing trace with hash -101275790, now seen corresponding path program 233 times [2021-06-05 22:09:50,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:50,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763916198] [2021-06-05 22:09:50,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:50,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:51,058 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:09:51,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:51,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763916198] [2021-06-05 22:09:51,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763916198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:51,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624578945] [2021-06-05 22:09:51,058 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:51,157 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:09:51,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:51,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 22:09:51,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:51,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:09:51,234 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:51,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:51,237 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:51,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:51,240 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:51,308 INFO L628 ElimStorePlain]: treesize reduction 24, result has 78.4 percent of original size [2021-06-05 22:09:51,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:51,312 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:51,358 INFO L628 ElimStorePlain]: treesize reduction 22, result has 73.5 percent of original size [2021-06-05 22:09:51,359 INFO L518 ElimStorePlain]: Eliminatee v_prenex_152 vanished before elimination [2021-06-05 22:09:51,361 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 3 dim-0 vars, and 3 xjuncts. [2021-06-05 22:09:51,361 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:122, output treesize:61 [2021-06-05 22:09:51,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:51,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:51,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:09:51,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:51,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:51,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:51,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:09:51,660 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:51,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:51,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:51,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:09:51,665 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:51,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:09:51,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:09:51,668 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:51,728 INFO L628 ElimStorePlain]: treesize reduction 79, result has 42.3 percent of original size [2021-06-05 22:09:51,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:09:51,731 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:51,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:51,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:09:51,756 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:207, output treesize:33 [2021-06-05 22:09:51,818 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:09:51,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624578945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:51,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:51,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:09:51,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787890300] [2021-06-05 22:09:51,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:09:51,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:51,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:09:51,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:09:51,818 INFO L87 Difference]: Start difference. First operand 881 states and 2881 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:52,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:52,308 INFO L93 Difference]: Finished difference Result 1350 states and 4249 transitions. [2021-06-05 22:09:52,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:09:52,308 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:09:52,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:52,310 INFO L225 Difference]: With dead ends: 1350 [2021-06-05 22:09:52,310 INFO L226 Difference]: Without dead ends: 1305 [2021-06-05 22:09:52,310 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 566.4ms TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:09:52,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1305 states. [2021-06-05 22:09:52,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1305 to 896. [2021-06-05 22:09:52,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.275977653631285) internal successors, (2932), 895 states have internal predecessors, (2932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:52,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2932 transitions. [2021-06-05 22:09:52,320 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2932 transitions. Word has length 23 [2021-06-05 22:09:52,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:52,320 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2932 transitions. [2021-06-05 22:09:52,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:52,320 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2932 transitions. [2021-06-05 22:09:52,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:09:52,321 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:52,321 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:52,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4395 [2021-06-05 22:09:52,525 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:52,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:52,525 INFO L82 PathProgramCache]: Analyzing trace with hash 54833778, now seen corresponding path program 234 times [2021-06-05 22:09:52,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:52,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223423385] [2021-06-05 22:09:52,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:52,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:52,799 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:52,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:52,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223423385] [2021-06-05 22:09:52,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223423385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:52,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649020705] [2021-06-05 22:09:52,799 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:52,895 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:09:52,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:09:52,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:09:52,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:53,231 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_156, ends_with_10], 1=[ends_with_6]} [2021-06-05 22:09:53,234 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:53,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:53,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:53,239 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:53,242 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:53,243 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:53,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:53,247 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:53,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:53,251 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:53,254 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:53,255 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:53,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:09:53,259 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:53,262 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:53,262 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:53,265 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:53,266 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:53,268 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:53,269 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:53,287 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:53,287 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:53,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:53,293 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:53,296 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:53,297 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:53,300 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:53,301 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:53,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:53,305 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:53,415 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2021-06-05 22:09:53,415 INFO L628 ElimStorePlain]: treesize reduction 135, result has 46.9 percent of original size [2021-06-05 22:09:53,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:09:53,422 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:53,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:53,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:09:53,472 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:53,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:53,475 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:53,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:53,478 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:53,528 INFO L628 ElimStorePlain]: treesize reduction 46, result has 56.2 percent of original size [2021-06-05 22:09:53,529 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:09:53,529 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 4 variables, input treesize:581, output treesize:35 [2021-06-05 22:09:53,627 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:09:53,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649020705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:53,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:09:53,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-06-05 22:09:53,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522221034] [2021-06-05 22:09:53,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:09:53,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:09:53,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:09:53,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:09:53,628 INFO L87 Difference]: Start difference. First operand 896 states and 2932 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:53,795 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-06-05 22:09:53,951 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-06-05 22:09:54,086 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2021-06-05 22:09:54,278 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2021-06-05 22:09:54,465 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2021-06-05 22:09:54,773 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2021-06-05 22:09:54,970 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2021-06-05 22:09:55,442 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2021-06-05 22:09:55,576 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2021-06-05 22:09:56,994 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2021-06-05 22:09:57,568 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-06-05 22:09:58,166 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2021-06-05 22:09:58,969 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2021-06-05 22:09:58,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:09:58,980 INFO L93 Difference]: Finished difference Result 2106 states and 6396 transitions. [2021-06-05 22:09:58,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 22:09:58,980 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:09:58,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:09:58,983 INFO L225 Difference]: With dead ends: 2106 [2021-06-05 22:09:58,983 INFO L226 Difference]: Without dead ends: 1979 [2021-06-05 22:09:58,983 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1905 ImplicationChecksByTransitivity, 4880.5ms TimeCoverageRelationStatistics Valid=787, Invalid=5533, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 22:09:58,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1979 states. [2021-06-05 22:09:58,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1979 to 944. [2021-06-05 22:09:58,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 944 states, 943 states have (on average 3.291622481442206) internal successors, (3104), 943 states have internal predecessors, (3104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:58,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 3104 transitions. [2021-06-05 22:09:58,996 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 3104 transitions. Word has length 23 [2021-06-05 22:09:58,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:09:58,996 INFO L482 AbstractCegarLoop]: Abstraction has 944 states and 3104 transitions. [2021-06-05 22:09:58,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:09:58,996 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 3104 transitions. [2021-06-05 22:09:58,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:09:58,997 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:09:58,997 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:09:59,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4484,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:59,197 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:09:59,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:09:59,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1457185666, now seen corresponding path program 235 times [2021-06-05 22:09:59,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:09:59,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761403513] [2021-06-05 22:09:59,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:09:59,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:59,399 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:09:59,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:09:59,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761403513] [2021-06-05 22:09:59,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761403513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:09:59,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323594571] [2021-06-05 22:09:59,400 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:09:59,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:09:59,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 22:09:59,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:09:59,821 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_157, v_prenex_159, v_prenex_158, ends_with_10], 1=[ends_with_6]} [2021-06-05 22:09:59,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:09:59,825 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:59,828 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:09:59,828 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:59,908 INFO L628 ElimStorePlain]: treesize reduction 178, result has 31.0 percent of original size [2021-06-05 22:09:59,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:09:59,912 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:59,969 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.7 percent of original size [2021-06-05 22:09:59,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:09:59,972 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:09:59,999 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:09:59,999 INFO L518 ElimStorePlain]: Eliminatee ends_with_10 vanished before elimination [2021-06-05 22:10:00,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:10:00,003 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:00,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:10:00,006 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:00,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:10:00,009 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:00,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:00,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 5 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:10:00,033 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:288, output treesize:35 [2021-06-05 22:10:00,094 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:10:00,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323594571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:00,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:00,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-06-05 22:10:00,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314265243] [2021-06-05 22:10:00,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:10:00,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:00,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:10:00,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:10:00,095 INFO L87 Difference]: Start difference. First operand 944 states and 3104 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:01,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:01,679 INFO L93 Difference]: Finished difference Result 1399 states and 4433 transitions. [2021-06-05 22:10:01,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 22:10:01,679 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:10:01,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:01,681 INFO L225 Difference]: With dead ends: 1399 [2021-06-05 22:10:01,681 INFO L226 Difference]: Without dead ends: 1345 [2021-06-05 22:10:01,681 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1299.3ms TimeCoverageRelationStatistics Valid=236, Invalid=1656, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:10:01,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1345 states. [2021-06-05 22:10:01,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1345 to 928. [2021-06-05 22:10:01,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 927 states have (on average 3.2837108953613807) internal successors, (3044), 927 states have internal predecessors, (3044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:01,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 3044 transitions. [2021-06-05 22:10:01,691 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 3044 transitions. Word has length 23 [2021-06-05 22:10:01,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:01,691 INFO L482 AbstractCegarLoop]: Abstraction has 928 states and 3044 transitions. [2021-06-05 22:10:01,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:01,691 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 3044 transitions. [2021-06-05 22:10:01,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:10:01,692 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:01,692 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:01,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4563 [2021-06-05 22:10:01,893 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:01,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:01,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1635109126, now seen corresponding path program 236 times [2021-06-05 22:10:01,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:01,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542943623] [2021-06-05 22:10:01,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:01,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:02,014 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:02,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:02,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542943623] [2021-06-05 22:10:02,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542943623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:02,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064305266] [2021-06-05 22:10:02,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:02,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:10:02,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:02,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 22:10:02,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:02,389 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:02,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064305266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:02,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:02,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:10:02,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108882884] [2021-06-05 22:10:02,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:10:02,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:02,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:10:02,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:10:02,390 INFO L87 Difference]: Start difference. First operand 928 states and 3044 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:03,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:03,372 INFO L93 Difference]: Finished difference Result 1707 states and 5349 transitions. [2021-06-05 22:10:03,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:10:03,372 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:10:03,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:03,375 INFO L225 Difference]: With dead ends: 1707 [2021-06-05 22:10:03,375 INFO L226 Difference]: Without dead ends: 1617 [2021-06-05 22:10:03,375 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1018.6ms TimeCoverageRelationStatistics Valid=189, Invalid=933, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:10:03,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1617 states. [2021-06-05 22:10:03,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1617 to 952. [2021-06-05 22:10:03,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 952 states, 951 states have (on average 3.305993690851735) internal successors, (3144), 951 states have internal predecessors, (3144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:03,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 3144 transitions. [2021-06-05 22:10:03,387 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 3144 transitions. Word has length 23 [2021-06-05 22:10:03,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:03,387 INFO L482 AbstractCegarLoop]: Abstraction has 952 states and 3144 transitions. [2021-06-05 22:10:03,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:03,387 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 3144 transitions. [2021-06-05 22:10:03,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:10:03,388 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:03,388 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:03,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4617,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:03,589 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:03,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:03,589 INFO L82 PathProgramCache]: Analyzing trace with hash 2049337868, now seen corresponding path program 237 times [2021-06-05 22:10:03,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:03,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901686286] [2021-06-05 22:10:03,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:03,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:03,754 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:03,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:03,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901686286] [2021-06-05 22:10:03,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901686286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:03,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088039856] [2021-06-05 22:10:03,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:03,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:10:03,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:03,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:10:03,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:03,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:10:03,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:03,988 INFO L628 ElimStorePlain]: treesize reduction 30, result has 68.8 percent of original size [2021-06-05 22:10:03,989 INFO L518 ElimStorePlain]: Eliminatee v_prenex_160 vanished before elimination [2021-06-05 22:10:03,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:10:03,992 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:04,024 INFO L628 ElimStorePlain]: treesize reduction 24, result has 61.3 percent of original size [2021-06-05 22:10:04,026 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-05 22:10:04,026 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:99, output treesize:30 [2021-06-05 22:10:04,303 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:10:04,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088039856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:04,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:04,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-06-05 22:10:04,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123425265] [2021-06-05 22:10:04,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:10:04,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:04,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:10:04,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:10:04,305 INFO L87 Difference]: Start difference. First operand 952 states and 3144 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:05,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:05,172 INFO L93 Difference]: Finished difference Result 1367 states and 4382 transitions. [2021-06-05 22:10:05,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:10:05,173 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:10:05,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:05,174 INFO L225 Difference]: With dead ends: 1367 [2021-06-05 22:10:05,174 INFO L226 Difference]: Without dead ends: 1313 [2021-06-05 22:10:05,175 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 752.7ms TimeCoverageRelationStatistics Valid=142, Invalid=914, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:10:05,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2021-06-05 22:10:05,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 974. [2021-06-05 22:10:05,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 973 states have (on average 3.3072970195272355) internal successors, (3218), 973 states have internal predecessors, (3218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:05,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 3218 transitions. [2021-06-05 22:10:05,185 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 3218 transitions. Word has length 23 [2021-06-05 22:10:05,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:05,185 INFO L482 AbstractCegarLoop]: Abstraction has 974 states and 3218 transitions. [2021-06-05 22:10:05,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:05,185 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 3218 transitions. [2021-06-05 22:10:05,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:10:05,186 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:05,186 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:05,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4631,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:05,387 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:05,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:05,387 INFO L82 PathProgramCache]: Analyzing trace with hash -344567604, now seen corresponding path program 238 times [2021-06-05 22:10:05,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:05,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140915278] [2021-06-05 22:10:05,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:05,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:05,483 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:05,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:05,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140915278] [2021-06-05 22:10:05,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140915278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:05,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228900858] [2021-06-05 22:10:05,484 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:05,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:10:05,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:05,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 22:10:05,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:05,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:10:05,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:05,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:10:05,659 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:05,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:10:05,662 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:05,730 INFO L628 ElimStorePlain]: treesize reduction 24, result has 78.4 percent of original size [2021-06-05 22:10:05,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:10:05,734 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:05,765 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:05,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:10:05,768 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:05,815 INFO L628 ElimStorePlain]: treesize reduction 19, result has 76.3 percent of original size [2021-06-05 22:10:05,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 3 dim-0 vars, and 3 xjuncts. [2021-06-05 22:10:05,818 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:122, output treesize:61 [2021-06-05 22:10:06,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:06,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:06,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:10:06,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:06,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:06,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:06,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:10:06,129 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:06,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:06,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:06,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:10:06,133 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:06,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:06,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:10:06,137 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:06,205 INFO L628 ElimStorePlain]: treesize reduction 84, result has 42.9 percent of original size [2021-06-05 22:10:06,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:10:06,208 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:06,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:10:06,211 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:06,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:06,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:10:06,236 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:209, output treesize:33 [2021-06-05 22:10:06,299 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:06,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228900858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:06,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:06,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:10:06,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917133441] [2021-06-05 22:10:06,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:10:06,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:06,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:10:06,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:10:06,300 INFO L87 Difference]: Start difference. First operand 974 states and 3218 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:06,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:06,908 INFO L93 Difference]: Finished difference Result 1750 states and 5441 transitions. [2021-06-05 22:10:06,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:10:06,908 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:10:06,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:06,911 INFO L225 Difference]: With dead ends: 1750 [2021-06-05 22:10:06,911 INFO L226 Difference]: Without dead ends: 1627 [2021-06-05 22:10:06,911 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 675.4ms TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:10:06,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1627 states. [2021-06-05 22:10:06,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1627 to 992. [2021-06-05 22:10:06,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 991 states have (on average 3.2986881937436934) internal successors, (3269), 991 states have internal predecessors, (3269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:06,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 3269 transitions. [2021-06-05 22:10:06,925 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 3269 transitions. Word has length 23 [2021-06-05 22:10:06,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:06,925 INFO L482 AbstractCegarLoop]: Abstraction has 992 states and 3269 transitions. [2021-06-05 22:10:06,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:06,925 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 3269 transitions. [2021-06-05 22:10:06,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:10:06,926 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:06,926 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:07,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4687,240 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:07,130 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:07,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:07,131 INFO L82 PathProgramCache]: Analyzing trace with hash -545544782, now seen corresponding path program 239 times [2021-06-05 22:10:07,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:07,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707154943] [2021-06-05 22:10:07,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:07,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:07,215 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:10:07,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:07,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707154943] [2021-06-05 22:10:07,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707154943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:07,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530752541] [2021-06-05 22:10:07,215 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:07,315 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:10:07,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:07,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:10:07,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:07,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:10:07,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:07,429 INFO L628 ElimStorePlain]: treesize reduction 4, result has 95.7 percent of original size [2021-06-05 22:10:07,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:10:07,432 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:07,487 INFO L628 ElimStorePlain]: treesize reduction 19, result has 77.4 percent of original size [2021-06-05 22:10:07,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:10:07,490 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:07,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:07,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:10:07,518 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:07,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:07,544 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 22:10:07,544 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:95, output treesize:53 [2021-06-05 22:10:07,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:10:07,861 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:07,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:07,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:07,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:10:07,868 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:07,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:07,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:10:07,871 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:07,893 INFO L628 ElimStorePlain]: treesize reduction 20, result has 56.5 percent of original size [2021-06-05 22:10:07,894 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:10:07,894 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:77, output treesize:20 [2021-06-05 22:10:07,943 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:10:07,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530752541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:07,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:07,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:10:07,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169058004] [2021-06-05 22:10:07,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:10:07,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:07,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:10:07,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:10:07,944 INFO L87 Difference]: Start difference. First operand 992 states and 3269 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:08,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:08,214 INFO L93 Difference]: Finished difference Result 1547 states and 4889 transitions. [2021-06-05 22:10:08,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:10:08,215 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:10:08,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:08,217 INFO L225 Difference]: With dead ends: 1547 [2021-06-05 22:10:08,218 INFO L226 Difference]: Without dead ends: 1502 [2021-06-05 22:10:08,218 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 373.9ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:10:08,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-06-05 22:10:08,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 992. [2021-06-05 22:10:08,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 991 states have (on average 3.2986881937436934) internal successors, (3269), 991 states have internal predecessors, (3269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:08,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 3269 transitions. [2021-06-05 22:10:08,233 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 3269 transitions. Word has length 23 [2021-06-05 22:10:08,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:08,233 INFO L482 AbstractCegarLoop]: Abstraction has 992 states and 3269 transitions. [2021-06-05 22:10:08,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:08,234 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 3269 transitions. [2021-06-05 22:10:08,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:10:08,235 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:08,235 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:08,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4734,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:08,436 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:08,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:08,436 INFO L82 PathProgramCache]: Analyzing trace with hash 191678748, now seen corresponding path program 240 times [2021-06-05 22:10:08,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:08,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335652529] [2021-06-05 22:10:08,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:08,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:08,649 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:08,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:08,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335652529] [2021-06-05 22:10:08,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335652529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:08,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590000853] [2021-06-05 22:10:08,650 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:08,748 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:10:08,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:08,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:10:08,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:08,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:10:08,854 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:08,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:10:08,858 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:08,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:10:08,862 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:08,864 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:10:08,865 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:08,914 INFO L628 ElimStorePlain]: treesize reduction 54, result has 53.0 percent of original size [2021-06-05 22:10:08,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:10:08,917 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:08,948 INFO L628 ElimStorePlain]: treesize reduction 20, result has 65.5 percent of original size [2021-06-05 22:10:08,948 INFO L518 ElimStorePlain]: Eliminatee v_prenex_172 vanished before elimination [2021-06-05 22:10:08,950 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-05 22:10:08,950 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:154, output treesize:30 [2021-06-05 22:10:09,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:09,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:09,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:10:09,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:09,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:09,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:09,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:10:09,190 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:09,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:09,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:09,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:10:09,194 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:09,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:09,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:10:09,198 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:09,256 INFO L628 ElimStorePlain]: treesize reduction 32, result has 66.3 percent of original size [2021-06-05 22:10:09,257 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:10:09,257 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:163, output treesize:47 [2021-06-05 22:10:09,370 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:10:09,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590000853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:09,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:09,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-05 22:10:09,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862251884] [2021-06-05 22:10:09,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:10:09,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:09,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:10:09,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:10:09,371 INFO L87 Difference]: Start difference. First operand 992 states and 3269 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:09,485 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-06-05 22:10:12,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:12,044 INFO L93 Difference]: Finished difference Result 1786 states and 5586 transitions. [2021-06-05 22:10:12,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 22:10:12,044 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:10:12,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:12,046 INFO L225 Difference]: With dead ends: 1786 [2021-06-05 22:10:12,046 INFO L226 Difference]: Without dead ends: 1628 [2021-06-05 22:10:12,047 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 2328.4ms TimeCoverageRelationStatistics Valid=393, Invalid=2469, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 22:10:12,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1628 states. [2021-06-05 22:10:12,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1628 to 1009. [2021-06-05 22:10:12,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1009 states, 1008 states have (on average 3.3055555555555554) internal successors, (3332), 1008 states have internal predecessors, (3332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:12,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 3332 transitions. [2021-06-05 22:10:12,059 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 3332 transitions. Word has length 23 [2021-06-05 22:10:12,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:12,059 INFO L482 AbstractCegarLoop]: Abstraction has 1009 states and 3332 transitions. [2021-06-05 22:10:12,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:12,060 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 3332 transitions. [2021-06-05 22:10:12,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:10:12,061 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:12,061 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:12,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4799,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:12,261 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:12,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:12,261 INFO L82 PathProgramCache]: Analyzing trace with hash -345814108, now seen corresponding path program 241 times [2021-06-05 22:10:12,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:12,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815147464] [2021-06-05 22:10:12,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:12,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:12,484 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:12,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:12,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815147464] [2021-06-05 22:10:12,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815147464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:12,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793165200] [2021-06-05 22:10:12,484 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:12,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:12,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:10:12,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:12,831 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:12,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793165200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:12,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:12,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-06-05 22:10:12,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814524294] [2021-06-05 22:10:12,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:10:12,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:12,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:10:12,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:10:12,833 INFO L87 Difference]: Start difference. First operand 1009 states and 3332 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:15,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:15,035 INFO L93 Difference]: Finished difference Result 1485 states and 4760 transitions. [2021-06-05 22:10:15,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 22:10:15,036 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:10:15,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:15,038 INFO L225 Difference]: With dead ends: 1485 [2021-06-05 22:10:15,038 INFO L226 Difference]: Without dead ends: 1428 [2021-06-05 22:10:15,038 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 1842.2ms TimeCoverageRelationStatistics Valid=335, Invalid=2317, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 22:10:15,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2021-06-05 22:10:15,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 1033. [2021-06-05 22:10:15,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 1032 states have (on average 3.302325581395349) internal successors, (3408), 1032 states have internal predecessors, (3408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:15,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 3408 transitions. [2021-06-05 22:10:15,050 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 3408 transitions. Word has length 23 [2021-06-05 22:10:15,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:15,050 INFO L482 AbstractCegarLoop]: Abstraction has 1033 states and 3408 transitions. [2021-06-05 22:10:15,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:15,050 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 3408 transitions. [2021-06-05 22:10:15,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:10:15,051 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:15,051 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:15,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4895,243 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:15,251 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:15,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:15,251 INFO L82 PathProgramCache]: Analyzing trace with hash 602455156, now seen corresponding path program 242 times [2021-06-05 22:10:15,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:15,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276442129] [2021-06-05 22:10:15,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:15,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:15,497 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:15,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:15,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276442129] [2021-06-05 22:10:15,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276442129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:15,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053698863] [2021-06-05 22:10:15,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:15,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:10:15,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:15,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 22:10:15,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:15,941 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:15,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053698863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:15,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:15,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-06-05 22:10:15,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462986313] [2021-06-05 22:10:15,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:10:15,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:15,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:10:15,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:10:15,942 INFO L87 Difference]: Start difference. First operand 1033 states and 3408 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:20,371 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2021-06-05 22:10:20,927 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 43 [2021-06-05 22:10:21,371 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 39 [2021-06-05 22:10:22,077 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 38 [2021-06-05 22:10:22,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:22,210 INFO L93 Difference]: Finished difference Result 2426 states and 7114 transitions. [2021-06-05 22:10:22,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-06-05 22:10:22,210 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:10:22,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:22,213 INFO L225 Difference]: With dead ends: 2426 [2021-06-05 22:10:22,213 INFO L226 Difference]: Without dead ends: 2105 [2021-06-05 22:10:22,214 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4198 ImplicationChecksByTransitivity, 5137.6ms TimeCoverageRelationStatistics Valid=895, Invalid=11095, Unknown=0, NotChecked=0, Total=11990 [2021-06-05 22:10:22,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2105 states. [2021-06-05 22:10:22,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2105 to 1097. [2021-06-05 22:10:22,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1097 states, 1096 states have (on average 3.31478102189781) internal successors, (3633), 1096 states have internal predecessors, (3633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:22,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 3633 transitions. [2021-06-05 22:10:22,229 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 3633 transitions. Word has length 23 [2021-06-05 22:10:22,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:22,229 INFO L482 AbstractCegarLoop]: Abstraction has 1097 states and 3633 transitions. [2021-06-05 22:10:22,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:22,229 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 3633 transitions. [2021-06-05 22:10:22,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:10:22,230 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:22,230 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:22,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4909 [2021-06-05 22:10:22,431 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:22,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:22,431 INFO L82 PathProgramCache]: Analyzing trace with hash 298857606, now seen corresponding path program 243 times [2021-06-05 22:10:22,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:22,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779154777] [2021-06-05 22:10:22,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:22,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:22,613 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:22,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:22,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779154777] [2021-06-05 22:10:22,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779154777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:22,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313002406] [2021-06-05 22:10:22,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:22,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:10:22,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:22,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:10:22,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:22,805 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:10:22,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:22,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:10:22,809 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:22,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:10:22,812 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:22,861 INFO L628 ElimStorePlain]: treesize reduction 30, result has 67.0 percent of original size [2021-06-05 22:10:22,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:10:22,865 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:22,897 INFO L628 ElimStorePlain]: treesize reduction 20, result has 65.5 percent of original size [2021-06-05 22:10:22,899 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-05 22:10:22,899 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:127, output treesize:30 [2021-06-05 22:10:23,175 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:23,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313002406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:23,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:23,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-05 22:10:23,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945256103] [2021-06-05 22:10:23,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:10:23,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:23,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:10:23,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:10:23,175 INFO L87 Difference]: Start difference. First operand 1097 states and 3633 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:24,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:24,953 INFO L93 Difference]: Finished difference Result 1772 states and 5608 transitions. [2021-06-05 22:10:24,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 22:10:24,954 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:10:24,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:24,956 INFO L225 Difference]: With dead ends: 1772 [2021-06-05 22:10:24,956 INFO L226 Difference]: Without dead ends: 1670 [2021-06-05 22:10:24,956 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 1351.9ms TimeCoverageRelationStatistics Valid=239, Invalid=2113, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 22:10:24,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2021-06-05 22:10:24,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 1102. [2021-06-05 22:10:24,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 1101 states have (on average 3.31244323342416) internal successors, (3647), 1101 states have internal predecessors, (3647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:24,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 3647 transitions. [2021-06-05 22:10:24,969 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 3647 transitions. Word has length 23 [2021-06-05 22:10:24,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:24,969 INFO L482 AbstractCegarLoop]: Abstraction has 1102 states and 3647 transitions. [2021-06-05 22:10:24,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:24,969 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 3647 transitions. [2021-06-05 22:10:24,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:10:24,970 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:24,970 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:25,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4923 [2021-06-05 22:10:25,171 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:25,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:25,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1212178272, now seen corresponding path program 244 times [2021-06-05 22:10:25,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:25,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405327429] [2021-06-05 22:10:25,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:25,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:25,393 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:25,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:25,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405327429] [2021-06-05 22:10:25,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405327429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:25,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651396555] [2021-06-05 22:10:25,394 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:25,491 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:10:25,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:25,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 22:10:25,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:25,813 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:25,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651396555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:25,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:25,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-05 22:10:25,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532712949] [2021-06-05 22:10:25,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:10:25,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:25,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:10:25,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:10:25,813 INFO L87 Difference]: Start difference. First operand 1102 states and 3647 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:26,154 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-06-05 22:10:28,335 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2021-06-05 22:10:29,207 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-06-05 22:10:30,527 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 54 [2021-06-05 22:10:30,800 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2021-06-05 22:10:31,072 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2021-06-05 22:10:31,476 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-06-05 22:10:32,072 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-06-05 22:10:32,397 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 63 [2021-06-05 22:10:32,701 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2021-06-05 22:10:33,029 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2021-06-05 22:10:33,575 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2021-06-05 22:10:33,816 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-06-05 22:10:34,366 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2021-06-05 22:10:34,996 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2021-06-05 22:10:35,147 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-06-05 22:10:35,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:35,150 INFO L93 Difference]: Finished difference Result 2858 states and 8256 transitions. [2021-06-05 22:10:35,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-06-05 22:10:35,150 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:10:35,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:35,154 INFO L225 Difference]: With dead ends: 2858 [2021-06-05 22:10:35,154 INFO L226 Difference]: Without dead ends: 2444 [2021-06-05 22:10:35,155 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5806 ImplicationChecksByTransitivity, 8149.3ms TimeCoverageRelationStatistics Valid=1328, Invalid=15184, Unknown=0, NotChecked=0, Total=16512 [2021-06-05 22:10:35,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2444 states. [2021-06-05 22:10:35,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2444 to 1160. [2021-06-05 22:10:35,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1160 states, 1159 states have (on average 3.3339085418464194) internal successors, (3864), 1159 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:35,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 3864 transitions. [2021-06-05 22:10:35,173 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 3864 transitions. Word has length 23 [2021-06-05 22:10:35,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:35,173 INFO L482 AbstractCegarLoop]: Abstraction has 1160 states and 3864 transitions. [2021-06-05 22:10:35,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:35,173 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 3864 transitions. [2021-06-05 22:10:35,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:10:35,174 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:35,175 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:35,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4964,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:35,375 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:35,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:35,375 INFO L82 PathProgramCache]: Analyzing trace with hash -235280272, now seen corresponding path program 245 times [2021-06-05 22:10:35,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:35,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001528568] [2021-06-05 22:10:35,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:35,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:35,558 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:35,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:35,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001528568] [2021-06-05 22:10:35,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001528568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:35,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864824289] [2021-06-05 22:10:35,559 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:35,659 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:10:35,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:35,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 22:10:35,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:35,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:10:35,758 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:35,860 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-06-05 22:10:35,861 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.9 percent of original size [2021-06-05 22:10:35,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:10:35,864 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:35,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:35,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:10:35,916 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:35,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:10:35,919 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:35,975 INFO L628 ElimStorePlain]: treesize reduction 49, result has 57.0 percent of original size [2021-06-05 22:10:35,975 INFO L518 ElimStorePlain]: Eliminatee v_prenex_174 vanished before elimination [2021-06-05 22:10:35,977 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 22:10:35,978 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:132, output treesize:57 [2021-06-05 22:10:36,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:36,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:36,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:10:36,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:36,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:36,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:36,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:10:36,499 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:36,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:36,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:36,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:10:36,505 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:36,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:36,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:36,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:10:36,512 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:36,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:36,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:10:36,518 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:36,696 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2021-06-05 22:10:36,696 INFO L628 ElimStorePlain]: treesize reduction 153, result has 44.8 percent of original size [2021-06-05 22:10:36,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:10:36,702 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:36,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:10:36,707 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:36,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:36,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 22:10:36,778 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:363, output treesize:80 [2021-06-05 22:10:36,938 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:36,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864824289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:36,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:36,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-05 22:10:36,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518275929] [2021-06-05 22:10:36,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:10:36,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:36,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:10:36,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:10:36,939 INFO L87 Difference]: Start difference. First operand 1160 states and 3864 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:37,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:37,943 INFO L93 Difference]: Finished difference Result 1864 states and 5964 transitions. [2021-06-05 22:10:37,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:10:37,943 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:10:37,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:37,946 INFO L225 Difference]: With dead ends: 1864 [2021-06-05 22:10:37,946 INFO L226 Difference]: Without dead ends: 1756 [2021-06-05 22:10:37,946 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1047.7ms TimeCoverageRelationStatistics Valid=149, Invalid=907, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:10:37,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1756 states. [2021-06-05 22:10:37,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1756 to 1159. [2021-06-05 22:10:37,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1159 states, 1158 states have (on average 3.3367875647668392) internal successors, (3864), 1158 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:37,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1159 states to 1159 states and 3864 transitions. [2021-06-05 22:10:37,961 INFO L78 Accepts]: Start accepts. Automaton has 1159 states and 3864 transitions. Word has length 23 [2021-06-05 22:10:37,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:37,961 INFO L482 AbstractCegarLoop]: Abstraction has 1159 states and 3864 transitions. [2021-06-05 22:10:37,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:37,961 INFO L276 IsEmpty]: Start isEmpty. Operand 1159 states and 3864 transitions. [2021-06-05 22:10:37,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:10:37,962 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:37,962 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:38,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4985,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:38,163 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:38,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:38,163 INFO L82 PathProgramCache]: Analyzing trace with hash -602834382, now seen corresponding path program 246 times [2021-06-05 22:10:38,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:38,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243520144] [2021-06-05 22:10:38,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:38,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:38,440 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:38,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:38,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243520144] [2021-06-05 22:10:38,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243520144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:38,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309529975] [2021-06-05 22:10:38,440 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:38,540 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:10:38,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:38,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 22:10:38,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:38,865 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:10:38,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309529975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:38,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:38,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-05 22:10:38,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711686698] [2021-06-05 22:10:38,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:10:38,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:38,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:10:38,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:10:38,866 INFO L87 Difference]: Start difference. First operand 1159 states and 3864 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:41,777 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-06-05 22:10:42,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:42,929 INFO L93 Difference]: Finished difference Result 2013 states and 6213 transitions. [2021-06-05 22:10:42,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 22:10:42,929 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:10:42,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:42,931 INFO L225 Difference]: With dead ends: 2013 [2021-06-05 22:10:42,931 INFO L226 Difference]: Without dead ends: 1908 [2021-06-05 22:10:42,932 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1630 ImplicationChecksByTransitivity, 3550.1ms TimeCoverageRelationStatistics Valid=633, Invalid=4917, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 22:10:42,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1908 states. [2021-06-05 22:10:42,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1908 to 1171. [2021-06-05 22:10:42,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1171 states, 1170 states have (on average 3.341025641025641) internal successors, (3909), 1170 states have internal predecessors, (3909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:42,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1171 states to 1171 states and 3909 transitions. [2021-06-05 22:10:42,945 INFO L78 Accepts]: Start accepts. Automaton has 1171 states and 3909 transitions. Word has length 23 [2021-06-05 22:10:42,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:42,946 INFO L482 AbstractCegarLoop]: Abstraction has 1171 states and 3909 transitions. [2021-06-05 22:10:42,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:42,946 INFO L276 IsEmpty]: Start isEmpty. Operand 1171 states and 3909 transitions. [2021-06-05 22:10:42,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:10:42,947 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:42,947 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:43,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5126,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:43,147 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:43,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:43,148 INFO L82 PathProgramCache]: Analyzing trace with hash -893034992, now seen corresponding path program 247 times [2021-06-05 22:10:43,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:43,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520181993] [2021-06-05 22:10:43,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:43,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:43,312 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:43,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:43,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520181993] [2021-06-05 22:10:43,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520181993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:43,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311732488] [2021-06-05 22:10:43,313 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:43,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:43,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:10:43,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:43,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:10:43,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:43,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:43,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:43,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:10:43,799 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:43,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:10:43,803 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:43,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:10:43,807 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:43,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:43,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:43,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:10:43,811 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:43,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:10:43,815 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:43,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:10:43,819 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:43,964 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-06-05 22:10:43,965 INFO L628 ElimStorePlain]: treesize reduction 63, result has 70.3 percent of original size [2021-06-05 22:10:43,971 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-06-05 22:10:43,971 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:271, output treesize:123 [2021-06-05 22:10:44,587 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:44,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311732488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:44,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:44,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-05 22:10:44,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729936491] [2021-06-05 22:10:44,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:10:44,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:44,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:10:44,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:10:44,588 INFO L87 Difference]: Start difference. First operand 1171 states and 3909 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:46,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:46,333 INFO L93 Difference]: Finished difference Result 1732 states and 5482 transitions. [2021-06-05 22:10:46,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 22:10:46,333 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:10:46,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:46,336 INFO L225 Difference]: With dead ends: 1732 [2021-06-05 22:10:46,336 INFO L226 Difference]: Without dead ends: 1627 [2021-06-05 22:10:46,336 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 1555.9ms TimeCoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 22:10:46,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1627 states. [2021-06-05 22:10:46,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1627 to 1188. [2021-06-05 22:10:46,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1188 states, 1187 states have (on average 3.3445661331086773) internal successors, (3970), 1187 states have internal predecessors, (3970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:46,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1188 states to 1188 states and 3970 transitions. [2021-06-05 22:10:46,350 INFO L78 Accepts]: Start accepts. Automaton has 1188 states and 3970 transitions. Word has length 23 [2021-06-05 22:10:46,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:46,350 INFO L482 AbstractCegarLoop]: Abstraction has 1188 states and 3970 transitions. [2021-06-05 22:10:46,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:46,350 INFO L276 IsEmpty]: Start isEmpty. Operand 1188 states and 3970 transitions. [2021-06-05 22:10:46,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:10:46,352 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:46,352 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:46,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5142 [2021-06-05 22:10:46,552 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:46,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:46,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1872595910, now seen corresponding path program 248 times [2021-06-05 22:10:46,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:46,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508755701] [2021-06-05 22:10:46,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:46,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:46,701 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:10:46,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:46,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508755701] [2021-06-05 22:10:46,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508755701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:46,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129034757] [2021-06-05 22:10:46,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:46,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:10:46,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:46,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 22:10:46,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:47,103 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:10:47,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129034757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:47,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:47,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:10:47,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805568143] [2021-06-05 22:10:47,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:10:47,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:47,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:10:47,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:10:47,103 INFO L87 Difference]: Start difference. First operand 1188 states and 3970 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:52,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:52,295 INFO L93 Difference]: Finished difference Result 2749 states and 8424 transitions. [2021-06-05 22:10:52,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-05 22:10:52,295 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:10:52,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:52,298 INFO L225 Difference]: With dead ends: 2749 [2021-06-05 22:10:52,298 INFO L226 Difference]: Without dead ends: 2512 [2021-06-05 22:10:52,298 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2204 ImplicationChecksByTransitivity, 4522.3ms TimeCoverageRelationStatistics Valid=715, Invalid=6091, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 22:10:52,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2512 states. [2021-06-05 22:10:52,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2512 to 1296. [2021-06-05 22:10:52,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1296 states, 1295 states have (on average 3.4308880308880307) internal successors, (4443), 1295 states have internal predecessors, (4443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:52,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1296 states to 1296 states and 4443 transitions. [2021-06-05 22:10:52,316 INFO L78 Accepts]: Start accepts. Automaton has 1296 states and 4443 transitions. Word has length 23 [2021-06-05 22:10:52,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:52,316 INFO L482 AbstractCegarLoop]: Abstraction has 1296 states and 4443 transitions. [2021-06-05 22:10:52,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:52,316 INFO L276 IsEmpty]: Start isEmpty. Operand 1296 states and 4443 transitions. [2021-06-05 22:10:52,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:10:52,318 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:52,318 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:52,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5275 [2021-06-05 22:10:52,518 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:52,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:52,518 INFO L82 PathProgramCache]: Analyzing trace with hash -88296408, now seen corresponding path program 249 times [2021-06-05 22:10:52,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:52,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076018307] [2021-06-05 22:10:52,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:52,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:52,659 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:10:52,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:52,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076018307] [2021-06-05 22:10:52,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076018307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:52,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883505989] [2021-06-05 22:10:52,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:52,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:10:52,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:52,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:10:52,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:53,147 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-06-05 22:10:53,415 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:53,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883505989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:53,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:53,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-06-05 22:10:53,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020105740] [2021-06-05 22:10:53,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:10:53,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:53,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:10:53,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:10:53,416 INFO L87 Difference]: Start difference. First operand 1296 states and 4443 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:55,569 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2021-06-05 22:10:56,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:56,797 INFO L93 Difference]: Finished difference Result 2273 states and 7227 transitions. [2021-06-05 22:10:56,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 22:10:56,797 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:10:56,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:56,800 INFO L225 Difference]: With dead ends: 2273 [2021-06-05 22:10:56,800 INFO L226 Difference]: Without dead ends: 2091 [2021-06-05 22:10:56,801 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 3254.7ms TimeCoverageRelationStatistics Valid=409, Invalid=3131, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 22:10:56,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2091 states. [2021-06-05 22:10:56,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2091 to 1342. [2021-06-05 22:10:56,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1342 states, 1341 states have (on average 3.41834451901566) internal successors, (4584), 1341 states have internal predecessors, (4584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:56,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1342 states to 1342 states and 4584 transitions. [2021-06-05 22:10:56,827 INFO L78 Accepts]: Start accepts. Automaton has 1342 states and 4584 transitions. Word has length 23 [2021-06-05 22:10:56,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:56,827 INFO L482 AbstractCegarLoop]: Abstraction has 1342 states and 4584 transitions. [2021-06-05 22:10:56,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:56,827 INFO L276 IsEmpty]: Start isEmpty. Operand 1342 states and 4584 transitions. [2021-06-05 22:10:56,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:10:56,828 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:56,828 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:57,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5295 [2021-06-05 22:10:57,029 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:57,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:57,029 INFO L82 PathProgramCache]: Analyzing trace with hash 2075591694, now seen corresponding path program 250 times [2021-06-05 22:10:57,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:57,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243383723] [2021-06-05 22:10:57,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:57,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:57,134 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:57,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:57,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243383723] [2021-06-05 22:10:57,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243383723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:57,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349428192] [2021-06-05 22:10:57,135 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:57,234 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:10:57,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:57,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:10:57,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:57,286 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:10:57,287 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:57,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:10:57,290 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:57,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:10:57,293 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:57,341 INFO L628 ElimStorePlain]: treesize reduction 32, result has 67.7 percent of original size [2021-06-05 22:10:57,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:10:57,345 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:57,376 INFO L628 ElimStorePlain]: treesize reduction 22, result has 65.6 percent of original size [2021-06-05 22:10:57,378 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-05 22:10:57,378 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:137, output treesize:35 [2021-06-05 22:10:57,624 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_187, ends_with_10, v_prenex_186, v_prenex_185], 1=[ends_with_2]} [2021-06-05 22:10:57,628 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:10:57,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:57,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:10:57,632 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:57,749 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-06-05 22:10:57,749 INFO L628 ElimStorePlain]: treesize reduction 66, result has 65.8 percent of original size [2021-06-05 22:10:57,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:10:57,753 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:57,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:10:57,756 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:57,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:10:57,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:10:57,821 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:57,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:10:57,825 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:57,913 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.1 percent of original size [2021-06-05 22:10:57,913 INFO L518 ElimStorePlain]: Eliminatee v_prenex_185 vanished before elimination [2021-06-05 22:10:57,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:10:57,917 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:57,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:10:57,920 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:57,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:10:57,923 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:57,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:10:57,926 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:57,988 INFO L628 ElimStorePlain]: treesize reduction 22, result has 77.3 percent of original size [2021-06-05 22:10:57,990 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 5 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:10:57,990 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 7 variables, input treesize:229, output treesize:45 [2021-06-05 22:10:58,050 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:58,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349428192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:58,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:58,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 22:10:58,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618725947] [2021-06-05 22:10:58,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:10:58,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:58,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:10:58,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:10:58,051 INFO L87 Difference]: Start difference. First operand 1342 states and 4584 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:58,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:58,394 INFO L93 Difference]: Finished difference Result 1665 states and 5536 transitions. [2021-06-05 22:10:58,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:10:58,394 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:10:58,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:58,397 INFO L225 Difference]: With dead ends: 1665 [2021-06-05 22:10:58,397 INFO L226 Difference]: Without dead ends: 1620 [2021-06-05 22:10:58,397 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 420.8ms TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:10:58,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1620 states. [2021-06-05 22:10:58,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1620 to 1277. [2021-06-05 22:10:58,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1277 states, 1276 states have (on average 3.4130094043887147) internal successors, (4355), 1276 states have internal predecessors, (4355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:58,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1277 states to 1277 states and 4355 transitions. [2021-06-05 22:10:58,411 INFO L78 Accepts]: Start accepts. Automaton has 1277 states and 4355 transitions. Word has length 23 [2021-06-05 22:10:58,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:58,411 INFO L482 AbstractCegarLoop]: Abstraction has 1277 states and 4355 transitions. [2021-06-05 22:10:58,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:58,411 INFO L276 IsEmpty]: Start isEmpty. Operand 1277 states and 4355 transitions. [2021-06-05 22:10:58,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:10:58,412 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:58,412 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:10:58,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5320 [2021-06-05 22:10:58,613 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:10:58,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:10:58,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1184269814, now seen corresponding path program 251 times [2021-06-05 22:10:58,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:10:58,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893609036] [2021-06-05 22:10:58,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:10:58,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:10:58,738 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:10:58,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:10:58,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893609036] [2021-06-05 22:10:58,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893609036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:58,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126092200] [2021-06-05 22:10:58,738 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:10:58,838 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:10:58,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:10:58,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 22:10:58,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:10:58,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:10:58,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:59,005 INFO L628 ElimStorePlain]: treesize reduction 28, result has 73.1 percent of original size [2021-06-05 22:10:59,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:10:59,009 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:59,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:10:59,029 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:59,082 INFO L628 ElimStorePlain]: treesize reduction 4, result has 94.2 percent of original size [2021-06-05 22:10:59,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 22:10:59,085 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:107, output treesize:57 [2021-06-05 22:10:59,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:59,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:59,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:10:59,397 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:59,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:59,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:59,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:10:59,401 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:59,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:59,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:59,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:10:59,405 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:59,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:59,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:59,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:10:59,409 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:59,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:10:59,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:10:59,413 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:10:59,469 INFO L628 ElimStorePlain]: treesize reduction 45, result has 55.9 percent of original size [2021-06-05 22:10:59,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:10:59,470 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:178, output treesize:41 [2021-06-05 22:10:59,549 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:10:59,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126092200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:10:59,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:10:59,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-05 22:10:59,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954322014] [2021-06-05 22:10:59,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:10:59,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:10:59,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:10:59,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:10:59,549 INFO L87 Difference]: Start difference. First operand 1277 states and 4355 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:59,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:10:59,936 INFO L93 Difference]: Finished difference Result 1650 states and 5508 transitions. [2021-06-05 22:10:59,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:10:59,936 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:10:59,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:10:59,938 INFO L225 Difference]: With dead ends: 1650 [2021-06-05 22:10:59,938 INFO L226 Difference]: Without dead ends: 1596 [2021-06-05 22:10:59,938 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 458.6ms TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:10:59,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1596 states. [2021-06-05 22:10:59,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1596 to 1256. [2021-06-05 22:10:59,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1256 states, 1255 states have (on average 3.4087649402390436) internal successors, (4278), 1255 states have internal predecessors, (4278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:59,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1256 states to 1256 states and 4278 transitions. [2021-06-05 22:10:59,960 INFO L78 Accepts]: Start accepts. Automaton has 1256 states and 4278 transitions. Word has length 23 [2021-06-05 22:10:59,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:10:59,960 INFO L482 AbstractCegarLoop]: Abstraction has 1256 states and 4278 transitions. [2021-06-05 22:10:59,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:10:59,960 INFO L276 IsEmpty]: Start isEmpty. Operand 1256 states and 4278 transitions. [2021-06-05 22:10:59,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:10:59,961 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:10:59,962 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:00,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5367,253 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:00,162 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:00,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:00,162 INFO L82 PathProgramCache]: Analyzing trace with hash 2108940534, now seen corresponding path program 252 times [2021-06-05 22:11:00,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:00,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775784580] [2021-06-05 22:11:00,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:00,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:00,429 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:00,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:00,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775784580] [2021-06-05 22:11:00,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775784580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:00,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044072629] [2021-06-05 22:11:00,429 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:00,530 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:11:00,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:00,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 22:11:00,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:00,733 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:11:00,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044072629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:00,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:00,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-05 22:11:00,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501532276] [2021-06-05 22:11:00,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:11:00,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:00,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:11:00,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:11:00,734 INFO L87 Difference]: Start difference. First operand 1256 states and 4278 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:01,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:01,789 INFO L93 Difference]: Finished difference Result 1604 states and 5367 transitions. [2021-06-05 22:11:01,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:11:01,789 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:11:01,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:01,791 INFO L225 Difference]: With dead ends: 1604 [2021-06-05 22:11:01,791 INFO L226 Difference]: Without dead ends: 1538 [2021-06-05 22:11:01,791 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 958.9ms TimeCoverageRelationStatistics Valid=177, Invalid=1155, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:11:01,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1538 states. [2021-06-05 22:11:01,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1538 to 1259. [2021-06-05 22:11:01,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1259 states, 1258 states have (on average 3.4054054054054053) internal successors, (4284), 1258 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:01,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1259 states to 1259 states and 4284 transitions. [2021-06-05 22:11:01,804 INFO L78 Accepts]: Start accepts. Automaton has 1259 states and 4284 transitions. Word has length 23 [2021-06-05 22:11:01,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:01,804 INFO L482 AbstractCegarLoop]: Abstraction has 1259 states and 4284 transitions. [2021-06-05 22:11:01,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:01,804 INFO L276 IsEmpty]: Start isEmpty. Operand 1259 states and 4284 transitions. [2021-06-05 22:11:01,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:11:01,805 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:01,805 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:02,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5453,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:02,006 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:02,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:02,006 INFO L82 PathProgramCache]: Analyzing trace with hash -930834746, now seen corresponding path program 253 times [2021-06-05 22:11:02,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:02,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5357430] [2021-06-05 22:11:02,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:02,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:02,265 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:02,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:02,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5357430] [2021-06-05 22:11:02,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5357430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:02,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288006661] [2021-06-05 22:11:02,265 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:02,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:02,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 22:11:02,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:02,651 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:11:02,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288006661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:02,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:02,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-05 22:11:02,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590832292] [2021-06-05 22:11:02,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:11:02,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:02,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:11:02,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:11:02,652 INFO L87 Difference]: Start difference. First operand 1259 states and 4284 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:03,131 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-06-05 22:11:03,783 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 41 [2021-06-05 22:11:05,306 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2021-06-05 22:11:05,952 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-06-05 22:11:06,231 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2021-06-05 22:11:07,061 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2021-06-05 22:11:07,201 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2021-06-05 22:11:07,442 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 51 [2021-06-05 22:11:07,770 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-06-05 22:11:08,258 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-06-05 22:11:08,439 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-06-05 22:11:08,583 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2021-06-05 22:11:08,787 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-06-05 22:11:09,022 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2021-06-05 22:11:09,208 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2021-06-05 22:11:09,437 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-06-05 22:11:09,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:09,593 INFO L93 Difference]: Finished difference Result 2846 states and 8745 transitions. [2021-06-05 22:11:09,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 22:11:09,593 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:11:09,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:09,596 INFO L225 Difference]: With dead ends: 2846 [2021-06-05 22:11:09,597 INFO L226 Difference]: Without dead ends: 2537 [2021-06-05 22:11:09,597 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2567 ImplicationChecksByTransitivity, 6072.4ms TimeCoverageRelationStatistics Valid=913, Invalid=7097, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 22:11:09,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2537 states. [2021-06-05 22:11:09,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2537 to 1324. [2021-06-05 22:11:09,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1324 states, 1323 states have (on average 3.4640967498110355) internal successors, (4583), 1323 states have internal predecessors, (4583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:09,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 4583 transitions. [2021-06-05 22:11:09,616 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 4583 transitions. Word has length 23 [2021-06-05 22:11:09,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:09,616 INFO L482 AbstractCegarLoop]: Abstraction has 1324 states and 4583 transitions. [2021-06-05 22:11:09,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:09,616 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 4583 transitions. [2021-06-05 22:11:09,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:11:09,618 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:09,618 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:09,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5464 [2021-06-05 22:11:09,818 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:09,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:09,818 INFO L82 PathProgramCache]: Analyzing trace with hash 359706776, now seen corresponding path program 254 times [2021-06-05 22:11:09,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:09,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160410035] [2021-06-05 22:11:09,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:09,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:09,990 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:11:09,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:09,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160410035] [2021-06-05 22:11:09,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160410035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:09,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899600341] [2021-06-05 22:11:09,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:10,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:11:10,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:10,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 22:11:10,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:10,358 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:11:10,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899600341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:10,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:10,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 22:11:10,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865019314] [2021-06-05 22:11:10,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:11:10,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:10,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:11:10,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:11:10,359 INFO L87 Difference]: Start difference. First operand 1324 states and 4583 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:13,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:13,963 INFO L93 Difference]: Finished difference Result 2176 states and 7003 transitions. [2021-06-05 22:11:13,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 22:11:13,964 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:11:13,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:13,967 INFO L225 Difference]: With dead ends: 2176 [2021-06-05 22:11:13,967 INFO L226 Difference]: Without dead ends: 2029 [2021-06-05 22:11:13,967 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1959 ImplicationChecksByTransitivity, 3047.9ms TimeCoverageRelationStatistics Valid=597, Invalid=5723, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 22:11:13,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2029 states. [2021-06-05 22:11:13,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2029 to 1362. [2021-06-05 22:11:13,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1362 states, 1361 states have (on average 3.476855253490081) internal successors, (4732), 1361 states have internal predecessors, (4732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:13,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1362 states to 1362 states and 4732 transitions. [2021-06-05 22:11:13,986 INFO L78 Accepts]: Start accepts. Automaton has 1362 states and 4732 transitions. Word has length 23 [2021-06-05 22:11:13,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:13,986 INFO L482 AbstractCegarLoop]: Abstraction has 1362 states and 4732 transitions. [2021-06-05 22:11:13,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:13,986 INFO L276 IsEmpty]: Start isEmpty. Operand 1362 states and 4732 transitions. [2021-06-05 22:11:13,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:11:13,987 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:13,987 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:14,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5476,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:14,188 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:14,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:14,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1320997318, now seen corresponding path program 255 times [2021-06-05 22:11:14,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:14,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369699579] [2021-06-05 22:11:14,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:14,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:14,281 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:11:14,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:14,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369699579] [2021-06-05 22:11:14,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369699579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:14,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317956527] [2021-06-05 22:11:14,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:14,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:11:14,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:14,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 22:11:14,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:14,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:11:14,490 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:14,555 INFO L628 ElimStorePlain]: treesize reduction 28, result has 73.1 percent of original size [2021-06-05 22:11:14,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:11:14,558 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:14,616 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.6 percent of original size [2021-06-05 22:11:14,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:11:14,619 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:14,672 INFO L628 ElimStorePlain]: treesize reduction 3, result has 95.6 percent of original size [2021-06-05 22:11:14,675 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 22:11:14,675 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:107, output treesize:57 [2021-06-05 22:11:14,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:14,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:14,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:11:14,899 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:14,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:14,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:14,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:11:14,903 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:14,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:14,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:14,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:11:14,907 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:14,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:14,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:11:14,910 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:14,962 INFO L628 ElimStorePlain]: treesize reduction 26, result has 68.7 percent of original size [2021-06-05 22:11:14,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:11:14,963 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:151, output treesize:41 [2021-06-05 22:11:15,039 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:11:15,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317956527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:15,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:15,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:11:15,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263051164] [2021-06-05 22:11:15,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:11:15,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:15,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:11:15,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:11:15,040 INFO L87 Difference]: Start difference. First operand 1362 states and 4732 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:15,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:15,469 INFO L93 Difference]: Finished difference Result 1860 states and 6275 transitions. [2021-06-05 22:11:15,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:11:15,470 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:11:15,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:15,472 INFO L225 Difference]: With dead ends: 1860 [2021-06-05 22:11:15,472 INFO L226 Difference]: Without dead ends: 1806 [2021-06-05 22:11:15,472 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 531.1ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:11:15,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1806 states. [2021-06-05 22:11:15,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1806 to 1380. [2021-06-05 22:11:15,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 3.4851341551849164) internal successors, (4806), 1379 states have internal predecessors, (4806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:15,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 4806 transitions. [2021-06-05 22:11:15,487 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 4806 transitions. Word has length 23 [2021-06-05 22:11:15,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:15,487 INFO L482 AbstractCegarLoop]: Abstraction has 1380 states and 4806 transitions. [2021-06-05 22:11:15,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:15,487 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 4806 transitions. [2021-06-05 22:11:15,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:11:15,489 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:15,489 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:15,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5492 [2021-06-05 22:11:15,692 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:15,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:15,692 INFO L82 PathProgramCache]: Analyzing trace with hash 148239946, now seen corresponding path program 256 times [2021-06-05 22:11:15,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:15,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255658971] [2021-06-05 22:11:15,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:15,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:15,890 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:15,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:15,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255658971] [2021-06-05 22:11:15,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255658971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:15,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580399898] [2021-06-05 22:11:15,890 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:15,993 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:11:15,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:15,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:11:15,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:16,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:11:16,097 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:16,099 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:16,100 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:16,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:11:16,103 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:16,151 INFO L628 ElimStorePlain]: treesize reduction 30, result has 67.0 percent of original size [2021-06-05 22:11:16,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:11:16,155 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:16,186 INFO L628 ElimStorePlain]: treesize reduction 20, result has 65.5 percent of original size [2021-06-05 22:11:16,187 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-05 22:11:16,187 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:127, output treesize:33 [2021-06-05 22:11:16,619 INFO L446 ElimStorePlain]: Different costs {0=[ends_with_10, v_prenex_194], 1=[ends_with_2]} [2021-06-05 22:11:16,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:11:16,623 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:16,626 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:16,627 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:16,779 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-06-05 22:11:16,779 INFO L628 ElimStorePlain]: treesize reduction 49, result has 78.1 percent of original size [2021-06-05 22:11:16,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:11:16,783 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:16,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:11:16,787 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:16,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:11:16,790 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:16,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:11:16,794 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:16,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:11:16,797 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:16,910 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-06-05 22:11:16,910 INFO L628 ElimStorePlain]: treesize reduction 26, result has 83.4 percent of original size [2021-06-05 22:11:16,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:11:16,914 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:16,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:11:16,918 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:16,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:11:16,921 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:16,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:11:16,925 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:17,000 INFO L628 ElimStorePlain]: treesize reduction 25, result has 78.4 percent of original size [2021-06-05 22:11:17,002 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:11:17,002 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:261, output treesize:57 [2021-06-05 22:11:17,111 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:11:17,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580399898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:17,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:17,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-06-05 22:11:17,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663643649] [2021-06-05 22:11:17,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:11:17,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:17,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:11:17,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:11:17,112 INFO L87 Difference]: Start difference. First operand 1380 states and 4806 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:18,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:18,827 INFO L93 Difference]: Finished difference Result 1752 states and 5922 transitions. [2021-06-05 22:11:18,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:11:18,828 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:11:18,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:18,830 INFO L225 Difference]: With dead ends: 1752 [2021-06-05 22:11:18,830 INFO L226 Difference]: Without dead ends: 1650 [2021-06-05 22:11:18,830 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1578.0ms TimeCoverageRelationStatistics Valid=235, Invalid=1325, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:11:18,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1650 states. [2021-06-05 22:11:18,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1650 to 1350. [2021-06-05 22:11:18,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1350 states, 1349 states have (on average 3.467753891771683) internal successors, (4678), 1349 states have internal predecessors, (4678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:18,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 4678 transitions. [2021-06-05 22:11:18,844 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 4678 transitions. Word has length 23 [2021-06-05 22:11:18,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:18,844 INFO L482 AbstractCegarLoop]: Abstraction has 1350 states and 4678 transitions. [2021-06-05 22:11:18,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:18,844 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 4678 transitions. [2021-06-05 22:11:18,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:11:18,845 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:18,845 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:19,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5537,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:19,047 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:19,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:19,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1096509210, now seen corresponding path program 257 times [2021-06-05 22:11:19,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:19,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502098599] [2021-06-05 22:11:19,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:19,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:19,203 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:19,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:19,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502098599] [2021-06-05 22:11:19,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502098599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:19,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322277516] [2021-06-05 22:11:19,204 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:19,304 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:11:19,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:19,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:11:19,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:19,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:11:19,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:19,461 INFO L628 ElimStorePlain]: treesize reduction 48, result has 64.7 percent of original size [2021-06-05 22:11:19,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:11:19,464 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:19,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:11:19,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:11:19,500 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:19,549 INFO L628 ElimStorePlain]: treesize reduction 19, result has 76.3 percent of original size [2021-06-05 22:11:19,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:11:19,553 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:19,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:11:19,576 INFO L518 ElimStorePlain]: Eliminatee v_prenex_196 vanished before elimination [2021-06-05 22:11:19,576 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:11:19,576 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:139, output treesize:58 [2021-06-05 22:11:19,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:11:19,757 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:19,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:11:19,760 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:19,877 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2021-06-05 22:11:19,877 INFO L628 ElimStorePlain]: treesize reduction 169, result has 46.3 percent of original size [2021-06-05 22:11:19,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:11:19,881 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:19,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:11:19,884 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:19,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:11:19,887 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:19,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:11:19,891 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:19,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:11:19,894 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:19,981 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.2 percent of original size [2021-06-05 22:11:19,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:11:19,985 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:19,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:11:19,988 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:20,039 INFO L628 ElimStorePlain]: treesize reduction 51, result has 56.8 percent of original size [2021-06-05 22:11:20,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:11:20,040 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 4 variables, input treesize:321, output treesize:55 [2021-06-05 22:11:20,145 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:11:20,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322277516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:20,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:20,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-06-05 22:11:20,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548313693] [2021-06-05 22:11:20,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:11:20,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:20,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:11:20,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:11:20,146 INFO L87 Difference]: Start difference. First operand 1350 states and 4678 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:21,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:21,392 INFO L93 Difference]: Finished difference Result 1969 states and 6573 transitions. [2021-06-05 22:11:21,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:11:21,393 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:11:21,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:21,395 INFO L225 Difference]: With dead ends: 1969 [2021-06-05 22:11:21,395 INFO L226 Difference]: Without dead ends: 1918 [2021-06-05 22:11:21,395 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 1107.3ms TimeCoverageRelationStatistics Valid=187, Invalid=1219, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:11:21,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2021-06-05 22:11:21,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1339. [2021-06-05 22:11:21,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1339 states, 1338 states have (on average 3.4715994020926755) internal successors, (4645), 1338 states have internal predecessors, (4645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:21,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1339 states to 1339 states and 4645 transitions. [2021-06-05 22:11:21,411 INFO L78 Accepts]: Start accepts. Automaton has 1339 states and 4645 transitions. Word has length 23 [2021-06-05 22:11:21,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:21,411 INFO L482 AbstractCegarLoop]: Abstraction has 1339 states and 4645 transitions. [2021-06-05 22:11:21,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:21,411 INFO L276 IsEmpty]: Start isEmpty. Operand 1339 states and 4645 transitions. [2021-06-05 22:11:21,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:11:21,412 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:21,412 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:21,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5640 [2021-06-05 22:11:21,613 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:21,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:21,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1328644520, now seen corresponding path program 258 times [2021-06-05 22:11:21,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:21,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279146535] [2021-06-05 22:11:21,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:21,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:21,765 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:21,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:21,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279146535] [2021-06-05 22:11:21,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279146535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:21,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780279326] [2021-06-05 22:11:21,765 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:21,867 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:11:21,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:21,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 22:11:21,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:21,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 22:11:21,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:22,011 INFO L628 ElimStorePlain]: treesize reduction 6, result has 94.3 percent of original size [2021-06-05 22:11:22,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 22:11:22,015 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:22,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 22:11:22,018 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:22,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 22:11:22,021 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:22,068 INFO L628 ElimStorePlain]: treesize reduction 21, result has 74.7 percent of original size [2021-06-05 22:11:22,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:11:22,069 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:111, output treesize:62 [2021-06-05 22:11:22,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:11:22,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:22,276 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:22,277 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:22,350 INFO L628 ElimStorePlain]: treesize reduction 92, result has 47.1 percent of original size [2021-06-05 22:11:22,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:11:22,355 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:22,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:11:22,358 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:22,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:11:22,361 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:22,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:11:22,390 INFO L518 ElimStorePlain]: Eliminatee v_prenex_202 vanished before elimination [2021-06-05 22:11:22,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:11:22,393 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:22,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:11:22,396 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:22,443 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.4 percent of original size [2021-06-05 22:11:22,444 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:11:22,444 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 5 variables, input treesize:204, output treesize:51 [2021-06-05 22:11:22,528 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:11:22,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780279326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:22,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:22,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-06-05 22:11:22,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791071639] [2021-06-05 22:11:22,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:11:22,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:22,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:11:22,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:11:22,529 INFO L87 Difference]: Start difference. First operand 1339 states and 4645 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:23,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:23,683 INFO L93 Difference]: Finished difference Result 1855 states and 6186 transitions. [2021-06-05 22:11:23,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:11:23,684 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:11:23,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:23,686 INFO L225 Difference]: With dead ends: 1855 [2021-06-05 22:11:23,686 INFO L226 Difference]: Without dead ends: 1804 [2021-06-05 22:11:23,686 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 1080.5ms TimeCoverageRelationStatistics Valid=192, Invalid=1368, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:11:23,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1804 states. [2021-06-05 22:11:23,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1804 to 1356. [2021-06-05 22:11:23,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1356 states, 1355 states have (on average 3.482656826568266) internal successors, (4719), 1355 states have internal predecessors, (4719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:23,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1356 states to 1356 states and 4719 transitions. [2021-06-05 22:11:23,701 INFO L78 Accepts]: Start accepts. Automaton has 1356 states and 4719 transitions. Word has length 23 [2021-06-05 22:11:23,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:23,701 INFO L482 AbstractCegarLoop]: Abstraction has 1356 states and 4719 transitions. [2021-06-05 22:11:23,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:23,702 INFO L276 IsEmpty]: Start isEmpty. Operand 1356 states and 4719 transitions. [2021-06-05 22:11:23,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:11:23,703 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:23,703 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:23,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5683,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:23,903 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:23,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:23,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1065013066, now seen corresponding path program 259 times [2021-06-05 22:11:23,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:23,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744248134] [2021-06-05 22:11:23,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:23,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:24,037 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:11:24,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:24,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744248134] [2021-06-05 22:11:24,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744248134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:24,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480753920] [2021-06-05 22:11:24,037 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:24,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:24,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 22:11:24,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:24,380 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:11:24,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480753920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:24,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:24,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 22:11:24,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530109662] [2021-06-05 22:11:24,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:11:24,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:24,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:11:24,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:11:24,381 INFO L87 Difference]: Start difference. First operand 1356 states and 4719 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:28,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:28,334 INFO L93 Difference]: Finished difference Result 2432 states and 7719 transitions. [2021-06-05 22:11:28,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 22:11:28,334 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:11:28,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:28,338 INFO L225 Difference]: With dead ends: 2432 [2021-06-05 22:11:28,338 INFO L226 Difference]: Without dead ends: 2270 [2021-06-05 22:11:28,338 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1759 ImplicationChecksByTransitivity, 3319.8ms TimeCoverageRelationStatistics Valid=606, Invalid=5556, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 22:11:28,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2270 states. [2021-06-05 22:11:28,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2270 to 1375. [2021-06-05 22:11:28,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1375 states, 1374 states have (on average 3.4963609898107713) internal successors, (4804), 1374 states have internal predecessors, (4804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:28,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1375 states to 1375 states and 4804 transitions. [2021-06-05 22:11:28,357 INFO L78 Accepts]: Start accepts. Automaton has 1375 states and 4804 transitions. Word has length 23 [2021-06-05 22:11:28,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:28,357 INFO L482 AbstractCegarLoop]: Abstraction has 1375 states and 4804 transitions. [2021-06-05 22:11:28,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:28,357 INFO L276 IsEmpty]: Start isEmpty. Operand 1375 states and 4804 transitions. [2021-06-05 22:11:28,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:11:28,358 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:28,358 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:28,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5721,261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:28,559 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:28,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:28,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1756904426, now seen corresponding path program 260 times [2021-06-05 22:11:28,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:28,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841094134] [2021-06-05 22:11:28,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:28,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:28,852 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:28,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:28,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841094134] [2021-06-05 22:11:28,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841094134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:28,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494498077] [2021-06-05 22:11:28,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:28,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:11:28,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:28,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 22:11:28,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:29,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:11:29,101 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:29,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:11:29,104 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:29,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:11:29,108 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:29,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:11:29,111 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:29,174 INFO L628 ElimStorePlain]: treesize reduction 52, result has 57.4 percent of original size [2021-06-05 22:11:29,175 INFO L518 ElimStorePlain]: Eliminatee ends_with_10 vanished before elimination [2021-06-05 22:11:29,177 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 3 xjuncts. [2021-06-05 22:11:29,177 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:137, output treesize:70 [2021-06-05 22:11:29,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:29,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:29,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:11:29,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:29,480 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:29,481 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:29,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:29,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:29,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:11:29,498 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:29,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:29,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:11:29,501 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:29,562 INFO L628 ElimStorePlain]: treesize reduction 62, result has 50.4 percent of original size [2021-06-05 22:11:29,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:11:29,566 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:29,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:11:29,569 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:29,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:11:29,593 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:11:29,594 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:207, output treesize:33 [2021-06-05 22:11:29,665 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:11:29,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494498077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:29,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:29,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 22:11:29,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296303237] [2021-06-05 22:11:29,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:11:29,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:29,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:11:29,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:11:29,666 INFO L87 Difference]: Start difference. First operand 1375 states and 4804 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:31,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:31,443 INFO L93 Difference]: Finished difference Result 1790 states and 5946 transitions. [2021-06-05 22:11:31,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:11:31,443 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:11:31,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:31,446 INFO L225 Difference]: With dead ends: 1790 [2021-06-05 22:11:31,446 INFO L226 Difference]: Without dead ends: 1730 [2021-06-05 22:11:31,446 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1409.8ms TimeCoverageRelationStatistics Valid=169, Invalid=1391, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:11:31,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1730 states. [2021-06-05 22:11:31,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1730 to 1351. [2021-06-05 22:11:31,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1351 states, 1350 states have (on average 3.4955555555555557) internal successors, (4719), 1350 states have internal predecessors, (4719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:31,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1351 states to 1351 states and 4719 transitions. [2021-06-05 22:11:31,461 INFO L78 Accepts]: Start accepts. Automaton has 1351 states and 4719 transitions. Word has length 23 [2021-06-05 22:11:31,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:31,461 INFO L482 AbstractCegarLoop]: Abstraction has 1351 states and 4719 transitions. [2021-06-05 22:11:31,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:31,461 INFO L276 IsEmpty]: Start isEmpty. Operand 1351 states and 4719 transitions. [2021-06-05 22:11:31,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:11:31,462 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:31,462 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:31,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5736,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:31,663 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:31,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:31,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1028994524, now seen corresponding path program 261 times [2021-06-05 22:11:31,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:31,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558382611] [2021-06-05 22:11:31,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:31,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:31,886 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:31,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:31,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558382611] [2021-06-05 22:11:31,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558382611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:31,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792546055] [2021-06-05 22:11:31,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:31,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:11:31,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:31,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 22:11:31,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:32,265 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:11:32,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792546055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:32,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:32,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-05 22:11:32,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776497395] [2021-06-05 22:11:32,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:11:32,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:32,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:11:32,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:11:32,266 INFO L87 Difference]: Start difference. First operand 1351 states and 4719 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:34,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:34,137 INFO L93 Difference]: Finished difference Result 1756 states and 5813 transitions. [2021-06-05 22:11:34,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 22:11:34,137 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:11:34,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:34,140 INFO L225 Difference]: With dead ends: 1756 [2021-06-05 22:11:34,140 INFO L226 Difference]: Without dead ends: 1680 [2021-06-05 22:11:34,140 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 1411.7ms TimeCoverageRelationStatistics Valid=208, Invalid=1862, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 22:11:34,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1680 states. [2021-06-05 22:11:34,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1680 to 1318. [2021-06-05 22:11:34,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1318 states, 1317 states have (on average 3.4738041002277904) internal successors, (4575), 1317 states have internal predecessors, (4575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:34,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 4575 transitions. [2021-06-05 22:11:34,155 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 4575 transitions. Word has length 23 [2021-06-05 22:11:34,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:34,155 INFO L482 AbstractCegarLoop]: Abstraction has 1318 states and 4575 transitions. [2021-06-05 22:11:34,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:34,155 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 4575 transitions. [2021-06-05 22:11:34,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:11:34,157 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:34,157 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:34,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5818 [2021-06-05 22:11:34,357 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:34,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:34,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1103912864, now seen corresponding path program 262 times [2021-06-05 22:11:34,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:34,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638598331] [2021-06-05 22:11:34,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:34,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:34,615 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:34,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:34,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638598331] [2021-06-05 22:11:34,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638598331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:34,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639982289] [2021-06-05 22:11:34,616 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:34,717 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:11:34,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:34,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 22:11:34,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:34,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:11:34,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:34,904 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.0 percent of original size [2021-06-05 22:11:34,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:11:34,907 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:34,966 INFO L628 ElimStorePlain]: treesize reduction 28, result has 71.7 percent of original size [2021-06-05 22:11:34,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:11:34,969 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:35,022 INFO L628 ElimStorePlain]: treesize reduction 3, result has 95.6 percent of original size [2021-06-05 22:11:35,024 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 22:11:35,024 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:107, output treesize:57 [2021-06-05 22:11:35,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:35,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:35,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:11:35,332 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:35,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:35,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:35,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:11:35,338 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:35,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:35,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:35,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:11:35,343 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:35,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:35,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:11:35,348 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:35,477 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2021-06-05 22:11:35,477 INFO L628 ElimStorePlain]: treesize reduction 99, result has 55.6 percent of original size [2021-06-05 22:11:35,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:11:35,481 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:35,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:11:35,485 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:35,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:11:35,540 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 22:11:35,540 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:301, output treesize:80 [2021-06-05 22:11:35,709 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:11:35,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639982289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:35,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:35,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-05 22:11:35,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977938139] [2021-06-05 22:11:35,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:11:35,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:35,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:11:35,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:11:35,710 INFO L87 Difference]: Start difference. First operand 1318 states and 4575 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:36,546 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-06-05 22:11:36,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:36,674 INFO L93 Difference]: Finished difference Result 1728 states and 5785 transitions. [2021-06-05 22:11:36,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:11:36,675 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:11:36,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:36,677 INFO L225 Difference]: With dead ends: 1728 [2021-06-05 22:11:36,677 INFO L226 Difference]: Without dead ends: 1674 [2021-06-05 22:11:36,677 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 1197.3ms TimeCoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:11:36,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1674 states. [2021-06-05 22:11:36,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1674 to 1307. [2021-06-05 22:11:36,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1307 states, 1306 states have (on average 3.4640122511485454) internal successors, (4524), 1306 states have internal predecessors, (4524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:36,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1307 states to 1307 states and 4524 transitions. [2021-06-05 22:11:36,691 INFO L78 Accepts]: Start accepts. Automaton has 1307 states and 4524 transitions. Word has length 23 [2021-06-05 22:11:36,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:36,691 INFO L482 AbstractCegarLoop]: Abstraction has 1307 states and 4524 transitions. [2021-06-05 22:11:36,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:36,691 INFO L276 IsEmpty]: Start isEmpty. Operand 1307 states and 4524 transitions. [2021-06-05 22:11:36,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:11:36,692 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:36,692 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:36,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5836 [2021-06-05 22:11:36,893 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:36,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:36,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1968196404, now seen corresponding path program 263 times [2021-06-05 22:11:36,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:36,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381551734] [2021-06-05 22:11:36,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:36,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:37,077 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:37,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:37,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381551734] [2021-06-05 22:11:37,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381551734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:37,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197203976] [2021-06-05 22:11:37,077 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:37,189 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:11:37,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:37,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:11:37,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:37,392 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:11:37,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197203976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:37,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:37,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-06-05 22:11:37,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286290625] [2021-06-05 22:11:37,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:11:37,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:37,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:11:37,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:11:37,393 INFO L87 Difference]: Start difference. First operand 1307 states and 4524 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:38,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:38,993 INFO L93 Difference]: Finished difference Result 1893 states and 6259 transitions. [2021-06-05 22:11:38,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 22:11:38,993 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:11:38,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:38,996 INFO L225 Difference]: With dead ends: 1893 [2021-06-05 22:11:38,996 INFO L226 Difference]: Without dead ends: 1784 [2021-06-05 22:11:38,996 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 1208.9ms TimeCoverageRelationStatistics Valid=275, Invalid=2275, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 22:11:38,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2021-06-05 22:11:39,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1302. [2021-06-05 22:11:39,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 1301 states have (on average 3.458877786318217) internal successors, (4500), 1301 states have internal predecessors, (4500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:39,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 4500 transitions. [2021-06-05 22:11:39,011 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 4500 transitions. Word has length 23 [2021-06-05 22:11:39,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:39,011 INFO L482 AbstractCegarLoop]: Abstraction has 1302 states and 4500 transitions. [2021-06-05 22:11:39,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:39,011 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 4500 transitions. [2021-06-05 22:11:39,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:11:39,013 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:39,013 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:39,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5893 [2021-06-05 22:11:39,213 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:39,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:39,213 INFO L82 PathProgramCache]: Analyzing trace with hash 109506426, now seen corresponding path program 264 times [2021-06-05 22:11:39,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:39,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210207739] [2021-06-05 22:11:39,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:39,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:39,321 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:11:39,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:39,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210207739] [2021-06-05 22:11:39,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210207739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:39,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116460854] [2021-06-05 22:11:39,321 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:39,426 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:11:39,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:39,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:11:39,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:39,672 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:11:39,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116460854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:39,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:39,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:11:39,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683380050] [2021-06-05 22:11:39,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:11:39,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:39,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:11:39,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:11:39,673 INFO L87 Difference]: Start difference. First operand 1302 states and 4500 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:42,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:42,884 INFO L93 Difference]: Finished difference Result 2376 states and 7653 transitions. [2021-06-05 22:11:42,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 22:11:42,884 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:11:42,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:42,887 INFO L225 Difference]: With dead ends: 2376 [2021-06-05 22:11:42,887 INFO L226 Difference]: Without dead ends: 2187 [2021-06-05 22:11:42,888 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 2640.7ms TimeCoverageRelationStatistics Valid=536, Invalid=4434, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 22:11:42,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2187 states. [2021-06-05 22:11:42,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2187 to 1345. [2021-06-05 22:11:42,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1345 states, 1344 states have (on average 3.486607142857143) internal successors, (4686), 1344 states have internal predecessors, (4686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:42,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 4686 transitions. [2021-06-05 22:11:42,905 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 4686 transitions. Word has length 23 [2021-06-05 22:11:42,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:42,905 INFO L482 AbstractCegarLoop]: Abstraction has 1345 states and 4686 transitions. [2021-06-05 22:11:42,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:42,905 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 4686 transitions. [2021-06-05 22:11:42,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:11:42,906 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:42,906 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:43,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5911 [2021-06-05 22:11:43,107 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:43,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:43,107 INFO L82 PathProgramCache]: Analyzing trace with hash 2135427910, now seen corresponding path program 265 times [2021-06-05 22:11:43,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:43,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623113619] [2021-06-05 22:11:43,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:43,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:43,210 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:11:43,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:43,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623113619] [2021-06-05 22:11:43,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623113619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:43,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138991881] [2021-06-05 22:11:43,210 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:43,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:43,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:11:43,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:43,546 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:11:43,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138991881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:43,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:43,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:11:43,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663800005] [2021-06-05 22:11:43,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:11:43,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:43,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:11:43,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:11:43,547 INFO L87 Difference]: Start difference. First operand 1345 states and 4686 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:45,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:45,842 INFO L93 Difference]: Finished difference Result 2059 states and 6741 transitions. [2021-06-05 22:11:45,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 22:11:45,843 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:11:45,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:45,845 INFO L225 Difference]: With dead ends: 2059 [2021-06-05 22:11:45,845 INFO L226 Difference]: Without dead ends: 1899 [2021-06-05 22:11:45,845 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 898 ImplicationChecksByTransitivity, 1842.4ms TimeCoverageRelationStatistics Valid=410, Invalid=3130, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 22:11:45,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899 states. [2021-06-05 22:11:45,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899 to 1275. [2021-06-05 22:11:45,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1275 states, 1274 states have (on average 3.4505494505494507) internal successors, (4396), 1274 states have internal predecessors, (4396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:45,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1275 states to 1275 states and 4396 transitions. [2021-06-05 22:11:45,860 INFO L78 Accepts]: Start accepts. Automaton has 1275 states and 4396 transitions. Word has length 23 [2021-06-05 22:11:45,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:45,860 INFO L482 AbstractCegarLoop]: Abstraction has 1275 states and 4396 transitions. [2021-06-05 22:11:45,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:45,860 INFO L276 IsEmpty]: Start isEmpty. Operand 1275 states and 4396 transitions. [2021-06-05 22:11:45,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 22:11:45,861 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:45,861 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:46,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5930,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:46,062 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:46,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:46,062 INFO L82 PathProgramCache]: Analyzing trace with hash -2009463328, now seen corresponding path program 266 times [2021-06-05 22:11:46,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:46,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295340095] [2021-06-05 22:11:46,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:46,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:46,328 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:46,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:46,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295340095] [2021-06-05 22:11:46,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295340095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:46,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175280918] [2021-06-05 22:11:46,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:46,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:11:46,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:46,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 22:11:46,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:46,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:11:46,550 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:46,634 INFO L628 ElimStorePlain]: treesize reduction 34, result has 74.6 percent of original size [2021-06-05 22:11:46,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:11:46,638 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:46,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:11:46,641 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:46,698 INFO L628 ElimStorePlain]: treesize reduction 22, result has 76.1 percent of original size [2021-06-05 22:11:46,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:11:46,702 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:46,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:11:46,731 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 22:11:46,731 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:137, output treesize:62 [2021-06-05 22:11:46,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:46,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:46,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:11:46,953 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:46,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:46,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:46,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:11:46,957 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:46,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:46,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:46,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:11:46,960 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:46,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:11:46,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 22:11:46,964 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:47,005 INFO L628 ElimStorePlain]: treesize reduction 45, result has 46.4 percent of original size [2021-06-05 22:11:47,006 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:11:47,007 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:145, output treesize:33 [2021-06-05 22:11:47,078 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:11:47,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175280918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:47,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:47,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 22:11:47,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669027459] [2021-06-05 22:11:47,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:11:47,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:47,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:11:47,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:11:47,079 INFO L87 Difference]: Start difference. First operand 1275 states and 4396 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:49,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:49,611 INFO L93 Difference]: Finished difference Result 1896 states and 6139 transitions. [2021-06-05 22:11:49,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 22:11:49,612 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 22:11:49,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:49,614 INFO L225 Difference]: With dead ends: 1896 [2021-06-05 22:11:49,614 INFO L226 Difference]: Without dead ends: 1788 [2021-06-05 22:11:49,614 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 2118.1ms TimeCoverageRelationStatistics Valid=272, Invalid=1984, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 22:11:49,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1788 states. [2021-06-05 22:11:49,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1788 to 1253. [2021-06-05 22:11:49,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1253 states, 1252 states have (on average 3.4544728434504792) internal successors, (4325), 1252 states have internal predecessors, (4325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:49,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1253 states to 1253 states and 4325 transitions. [2021-06-05 22:11:49,629 INFO L78 Accepts]: Start accepts. Automaton has 1253 states and 4325 transitions. Word has length 23 [2021-06-05 22:11:49,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:49,629 INFO L482 AbstractCegarLoop]: Abstraction has 1253 states and 4325 transitions. [2021-06-05 22:11:49,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:49,629 INFO L276 IsEmpty]: Start isEmpty. Operand 1253 states and 4325 transitions. [2021-06-05 22:11:49,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:11:49,630 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:49,630 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:49,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5944,268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:49,831 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:49,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:49,831 INFO L82 PathProgramCache]: Analyzing trace with hash 995054606, now seen corresponding path program 267 times [2021-06-05 22:11:49,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:49,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041093905] [2021-06-05 22:11:49,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:49,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:49,957 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:49,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:49,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041093905] [2021-06-05 22:11:49,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041093905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:49,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28697267] [2021-06-05 22:11:49,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:50,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:11:50,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:50,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:11:50,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:50,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:11:50,084 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:50,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:11:50,090 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-05 22:11:50,090 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:13 [2021-06-05 22:11:50,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:11:50,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:50,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:11:50,198 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:50,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:11:50,201 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:50,237 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-06-05 22:11:50,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:11:50,240 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:50,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:11:50,242 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:50,268 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-05 22:11:50,269 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:11:50,269 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-05 22:11:50,307 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:11:50,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28697267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:50,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:50,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 18 [2021-06-05 22:11:50,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653143353] [2021-06-05 22:11:50,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:11:50,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:50,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:11:50,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:11:50,308 INFO L87 Difference]: Start difference. First operand 1253 states and 4325 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:51,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:51,633 INFO L93 Difference]: Finished difference Result 1836 states and 5986 transitions. [2021-06-05 22:11:51,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 22:11:51,633 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:11:51,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:51,636 INFO L225 Difference]: With dead ends: 1836 [2021-06-05 22:11:51,636 INFO L226 Difference]: Without dead ends: 1742 [2021-06-05 22:11:51,636 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 1082.3ms TimeCoverageRelationStatistics Valid=448, Invalid=2102, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 22:11:51,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1742 states. [2021-06-05 22:11:51,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1742 to 1236. [2021-06-05 22:11:51,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1236 states, 1235 states have (on average 3.473684210526316) internal successors, (4290), 1235 states have internal predecessors, (4290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:51,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 4290 transitions. [2021-06-05 22:11:51,652 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 4290 transitions. Word has length 24 [2021-06-05 22:11:51,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:51,652 INFO L482 AbstractCegarLoop]: Abstraction has 1236 states and 4290 transitions. [2021-06-05 22:11:51,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:51,652 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 4290 transitions. [2021-06-05 22:11:51,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:11:51,653 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:51,653 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:51,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6002 [2021-06-05 22:11:51,854 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:51,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:51,854 INFO L82 PathProgramCache]: Analyzing trace with hash -402598, now seen corresponding path program 268 times [2021-06-05 22:11:51,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:51,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557468000] [2021-06-05 22:11:51,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:51,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:51,932 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:11:51,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:51,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557468000] [2021-06-05 22:11:51,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557468000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:51,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408540810] [2021-06-05 22:11:51,933 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:52,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:11:52,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:52,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:11:52,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:52,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:11:52,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:52,073 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:11:52,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-05 22:11:52,074 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:13 [2021-06-05 22:11:52,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:11:52,135 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:52,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:11:52,138 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:52,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:11:52,142 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:52,188 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-06-05 22:11:52,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:11:52,191 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:52,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:11:52,194 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:52,220 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-05 22:11:52,221 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:11:52,221 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-05 22:11:52,255 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:11:52,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408540810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:52,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:52,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 14 [2021-06-05 22:11:52,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766854639] [2021-06-05 22:11:52,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:11:52,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:52,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:11:52,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:11:52,256 INFO L87 Difference]: Start difference. First operand 1236 states and 4290 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:52,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:52,610 INFO L93 Difference]: Finished difference Result 1658 states and 5527 transitions. [2021-06-05 22:11:52,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:11:52,611 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:11:52,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:52,613 INFO L225 Difference]: With dead ends: 1658 [2021-06-05 22:11:52,613 INFO L226 Difference]: Without dead ends: 1599 [2021-06-05 22:11:52,613 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 301.4ms TimeCoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:11:52,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1599 states. [2021-06-05 22:11:52,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1599 to 1258. [2021-06-05 22:11:52,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1258 states, 1257 states have (on average 3.484486873508353) internal successors, (4380), 1257 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:52,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1258 states to 1258 states and 4380 transitions. [2021-06-05 22:11:52,626 INFO L78 Accepts]: Start accepts. Automaton has 1258 states and 4380 transitions. Word has length 24 [2021-06-05 22:11:52,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:52,626 INFO L482 AbstractCegarLoop]: Abstraction has 1258 states and 4380 transitions. [2021-06-05 22:11:52,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:52,626 INFO L276 IsEmpty]: Start isEmpty. Operand 1258 states and 4380 transitions. [2021-06-05 22:11:52,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:11:52,628 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:52,628 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:52,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6010,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:52,828 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:52,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:52,828 INFO L82 PathProgramCache]: Analyzing trace with hash 2080068998, now seen corresponding path program 269 times [2021-06-05 22:11:52,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:52,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492199333] [2021-06-05 22:11:52,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:52,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:52,909 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:11:52,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:52,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492199333] [2021-06-05 22:11:52,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492199333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:52,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874983350] [2021-06-05 22:11:52,910 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:53,015 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:11:53,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:53,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:11:53,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:53,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:11:53,044 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:53,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:11:53,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-05 22:11:53,051 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:13 [2021-06-05 22:11:53,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:11:53,118 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:53,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:11:53,121 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:53,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:11:53,124 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:53,160 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-06-05 22:11:53,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:11:53,163 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:53,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:11:53,165 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:53,191 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-05 22:11:53,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:11:53,192 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-05 22:11:53,235 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:11:53,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874983350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:53,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:53,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2021-06-05 22:11:53,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538113723] [2021-06-05 22:11:53,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:11:53,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:53,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:11:53,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:11:53,236 INFO L87 Difference]: Start difference. First operand 1258 states and 4380 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:53,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:53,618 INFO L93 Difference]: Finished difference Result 1659 states and 5547 transitions. [2021-06-05 22:11:53,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:11:53,618 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:11:53,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:53,620 INFO L225 Difference]: With dead ends: 1659 [2021-06-05 22:11:53,620 INFO L226 Difference]: Without dead ends: 1600 [2021-06-05 22:11:53,620 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 292.7ms TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:11:53,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1600 states. [2021-06-05 22:11:53,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1600 to 1283. [2021-06-05 22:11:53,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1283 states, 1282 states have (on average 3.49609984399376) internal successors, (4482), 1282 states have internal predecessors, (4482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:53,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 4482 transitions. [2021-06-05 22:11:53,634 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 4482 transitions. Word has length 24 [2021-06-05 22:11:53,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:53,634 INFO L482 AbstractCegarLoop]: Abstraction has 1283 states and 4482 transitions. [2021-06-05 22:11:53,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:53,634 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 4482 transitions. [2021-06-05 22:11:53,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:11:53,635 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:53,635 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:53,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6019,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:53,836 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:53,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:53,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1039407654, now seen corresponding path program 270 times [2021-06-05 22:11:53,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:53,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660659045] [2021-06-05 22:11:53,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:53,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:53,991 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:53,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:53,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660659045] [2021-06-05 22:11:53,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660659045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:53,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612545525] [2021-06-05 22:11:53,992 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:54,097 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:11:54,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:54,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:11:54,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:54,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:11:54,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:54,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:11:54,127 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-05 22:11:54,128 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:13 [2021-06-05 22:11:54,373 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:11:54,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612545525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:54,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:54,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-06-05 22:11:54,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844941327] [2021-06-05 22:11:54,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:11:54,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:54,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:11:54,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:11:54,373 INFO L87 Difference]: Start difference. First operand 1283 states and 4482 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:56,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:56,770 INFO L93 Difference]: Finished difference Result 2239 states and 7277 transitions. [2021-06-05 22:11:56,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 22:11:56,770 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:11:56,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:56,773 INFO L225 Difference]: With dead ends: 2239 [2021-06-05 22:11:56,773 INFO L226 Difference]: Without dead ends: 2113 [2021-06-05 22:11:56,773 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 1920.4ms TimeCoverageRelationStatistics Valid=491, Invalid=2931, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 22:11:56,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2113 states. [2021-06-05 22:11:56,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2113 to 1282. [2021-06-05 22:11:56,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1281 states have (on average 3.501951600312256) internal successors, (4486), 1281 states have internal predecessors, (4486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:56,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 4486 transitions. [2021-06-05 22:11:56,789 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 4486 transitions. Word has length 24 [2021-06-05 22:11:56,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:56,789 INFO L482 AbstractCegarLoop]: Abstraction has 1282 states and 4486 transitions. [2021-06-05 22:11:56,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:56,789 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 4486 transitions. [2021-06-05 22:11:56,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:11:56,791 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:56,791 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:56,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6027,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:56,991 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:56,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:56,991 INFO L82 PathProgramCache]: Analyzing trace with hash -794804850, now seen corresponding path program 271 times [2021-06-05 22:11:56,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:56,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54564953] [2021-06-05 22:11:56,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:56,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:57,097 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:57,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:57,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54564953] [2021-06-05 22:11:57,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54564953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:57,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121798704] [2021-06-05 22:11:57,097 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:57,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:57,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:11:57,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:57,232 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:57,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:57,255 INFO L628 ElimStorePlain]: treesize reduction 2, result has 93.3 percent of original size [2021-06-05 22:11:57,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 22:11:57,258 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:57,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:11:57,267 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:11:57,267 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:49, output treesize:22 [2021-06-05 22:11:57,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:11:57,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:57,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:11:57,323 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:57,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:11:57,325 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:57,361 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-06-05 22:11:57,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:11:57,364 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:57,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:11:57,367 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:57,393 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-05 22:11:57,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:11:57,405 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-05 22:11:57,450 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:11:57,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121798704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:57,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:57,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 22:11:57,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972735473] [2021-06-05 22:11:57,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:11:57,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:57,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:11:57,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:11:57,451 INFO L87 Difference]: Start difference. First operand 1282 states and 4486 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:57,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:57,818 INFO L93 Difference]: Finished difference Result 1579 states and 5362 transitions. [2021-06-05 22:11:57,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:11:57,819 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:11:57,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:57,820 INFO L225 Difference]: With dead ends: 1579 [2021-06-05 22:11:57,821 INFO L226 Difference]: Without dead ends: 1528 [2021-06-05 22:11:57,821 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 354.4ms TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:11:57,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1528 states. [2021-06-05 22:11:57,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1528 to 1318. [2021-06-05 22:11:57,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1318 states, 1317 states have (on average 3.507972665148064) internal successors, (4620), 1317 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:57,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 4620 transitions. [2021-06-05 22:11:57,834 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 4620 transitions. Word has length 24 [2021-06-05 22:11:57,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:57,834 INFO L482 AbstractCegarLoop]: Abstraction has 1318 states and 4620 transitions. [2021-06-05 22:11:57,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:57,834 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 4620 transitions. [2021-06-05 22:11:57,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:11:57,836 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:57,836 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:58,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6063 [2021-06-05 22:11:58,036 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:58,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:58,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1285666746, now seen corresponding path program 272 times [2021-06-05 22:11:58,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:58,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370182606] [2021-06-05 22:11:58,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:58,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:58,146 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:58,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:58,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370182606] [2021-06-05 22:11:58,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370182606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:58,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454981526] [2021-06-05 22:11:58,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:58,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:11:58,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:58,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:11:58,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:58,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 22:11:58,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:58,327 INFO L628 ElimStorePlain]: treesize reduction 2, result has 91.7 percent of original size [2021-06-05 22:11:58,328 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:11:58,328 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:22 [2021-06-05 22:11:58,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:11:58,405 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:58,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:11:58,408 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:58,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:11:58,411 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:58,447 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-06-05 22:11:58,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:11:58,450 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:58,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:11:58,453 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:58,478 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-05 22:11:58,479 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:11:58,479 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-05 22:11:58,527 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:11:58,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454981526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:58,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:58,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 22:11:58,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062832669] [2021-06-05 22:11:58,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:11:58,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:58,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:11:58,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:11:58,528 INFO L87 Difference]: Start difference. First operand 1318 states and 4620 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:58,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:11:58,869 INFO L93 Difference]: Finished difference Result 1678 states and 5684 transitions. [2021-06-05 22:11:58,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:11:58,870 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:11:58,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:11:58,872 INFO L225 Difference]: With dead ends: 1678 [2021-06-05 22:11:58,872 INFO L226 Difference]: Without dead ends: 1627 [2021-06-05 22:11:58,872 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 360.5ms TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:11:58,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1627 states. [2021-06-05 22:11:58,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1627 to 1343. [2021-06-05 22:11:58,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1343 states, 1342 states have (on average 3.518628912071535) internal successors, (4722), 1342 states have internal predecessors, (4722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:58,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1343 states to 1343 states and 4722 transitions. [2021-06-05 22:11:58,886 INFO L78 Accepts]: Start accepts. Automaton has 1343 states and 4722 transitions. Word has length 24 [2021-06-05 22:11:58,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:11:58,886 INFO L482 AbstractCegarLoop]: Abstraction has 1343 states and 4722 transitions. [2021-06-05 22:11:58,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:11:58,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1343 states and 4722 transitions. [2021-06-05 22:11:58,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:11:58,888 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:11:58,888 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:11:59,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6069 [2021-06-05 22:11:59,088 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:11:59,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:11:59,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1833809906, now seen corresponding path program 273 times [2021-06-05 22:11:59,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:11:59,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315534830] [2021-06-05 22:11:59,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:11:59,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:11:59,198 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:11:59,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:11:59,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315534830] [2021-06-05 22:11:59,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315534830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:59,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964306433] [2021-06-05 22:11:59,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:11:59,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:11:59,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:11:59,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:11:59,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:11:59,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 22:11:59,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:59,355 INFO L628 ElimStorePlain]: treesize reduction 2, result has 91.7 percent of original size [2021-06-05 22:11:59,355 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:11:59,356 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:22 [2021-06-05 22:11:59,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:11:59,516 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:59,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:11:59,520 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:59,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:11:59,523 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:59,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:11:59,527 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:59,529 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:59,530 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:59,532 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:59,533 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:59,535 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:11:59,536 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:59,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:11:59,539 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:59,607 INFO L628 ElimStorePlain]: treesize reduction 20, result has 80.4 percent of original size [2021-06-05 22:11:59,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:11:59,610 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:59,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:11:59,614 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:59,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:11:59,617 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:11:59,656 INFO L628 ElimStorePlain]: treesize reduction 21, result has 70.4 percent of original size [2021-06-05 22:11:59,656 INFO L518 ElimStorePlain]: Eliminatee v_prenex_215 vanished before elimination [2021-06-05 22:11:59,657 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:11:59,657 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:201, output treesize:34 [2021-06-05 22:11:59,729 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:11:59,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964306433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:11:59,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:11:59,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 22:11:59,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154513582] [2021-06-05 22:11:59,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:11:59,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:11:59,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:11:59,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:11:59,730 INFO L87 Difference]: Start difference. First operand 1343 states and 4722 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:00,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:00,123 INFO L93 Difference]: Finished difference Result 1761 states and 5948 transitions. [2021-06-05 22:12:00,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:12:00,123 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:12:00,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:00,125 INFO L225 Difference]: With dead ends: 1761 [2021-06-05 22:12:00,125 INFO L226 Difference]: Without dead ends: 1710 [2021-06-05 22:12:00,125 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 370.8ms TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:12:00,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1710 states. [2021-06-05 22:12:00,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1710 to 1371. [2021-06-05 22:12:00,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1371 states, 1370 states have (on average 3.55036496350365) internal successors, (4864), 1370 states have internal predecessors, (4864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:00,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1371 states to 1371 states and 4864 transitions. [2021-06-05 22:12:00,140 INFO L78 Accepts]: Start accepts. Automaton has 1371 states and 4864 transitions. Word has length 24 [2021-06-05 22:12:00,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:00,140 INFO L482 AbstractCegarLoop]: Abstraction has 1371 states and 4864 transitions. [2021-06-05 22:12:00,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:00,141 INFO L276 IsEmpty]: Start isEmpty. Operand 1371 states and 4864 transitions. [2021-06-05 22:12:00,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:12:00,142 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:00,142 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:00,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6079 [2021-06-05 22:12:00,343 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:00,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:00,343 INFO L82 PathProgramCache]: Analyzing trace with hash -220243172, now seen corresponding path program 274 times [2021-06-05 22:12:00,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:00,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630007225] [2021-06-05 22:12:00,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:00,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:00,443 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:00,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:00,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630007225] [2021-06-05 22:12:00,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630007225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:00,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220245941] [2021-06-05 22:12:00,443 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:00,547 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:12:00,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:00,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:12:00,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:00,578 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:00,579 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:00,601 INFO L628 ElimStorePlain]: treesize reduction 2, result has 93.3 percent of original size [2021-06-05 22:12:00,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 22:12:00,604 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:00,613 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:00,613 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:12:00,614 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:49, output treesize:22 [2021-06-05 22:12:00,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:12:00,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:00,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:00,768 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:00,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:12:00,771 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:00,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:00,775 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:00,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:00,778 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:00,781 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:00,781 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:00,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:00,785 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:00,787 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:00,788 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:00,860 INFO L628 ElimStorePlain]: treesize reduction 42, result has 66.4 percent of original size [2021-06-05 22:12:00,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:12:00,864 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:00,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:00,867 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:00,924 INFO L628 ElimStorePlain]: treesize reduction 3, result has 96.1 percent of original size [2021-06-05 22:12:00,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:12:00,927 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:00,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:00,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:00,957 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:01,007 INFO L628 ElimStorePlain]: treesize reduction 16, result has 75.8 percent of original size [2021-06-05 22:12:01,008 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:12:01,008 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:201, output treesize:34 [2021-06-05 22:12:01,078 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:12:01,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220245941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:01,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:01,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 22:12:01,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391044721] [2021-06-05 22:12:01,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:12:01,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:01,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:12:01,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:12:01,079 INFO L87 Difference]: Start difference. First operand 1371 states and 4864 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:01,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:01,525 INFO L93 Difference]: Finished difference Result 1701 states and 5782 transitions. [2021-06-05 22:12:01,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:12:01,525 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:12:01,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:01,527 INFO L225 Difference]: With dead ends: 1701 [2021-06-05 22:12:01,527 INFO L226 Difference]: Without dead ends: 1638 [2021-06-05 22:12:01,527 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 444.0ms TimeCoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:12:01,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1638 states. [2021-06-05 22:12:01,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1638 to 1296. [2021-06-05 22:12:01,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1296 states, 1295 states have (on average 3.498069498069498) internal successors, (4530), 1295 states have internal predecessors, (4530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:01,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1296 states to 1296 states and 4530 transitions. [2021-06-05 22:12:01,540 INFO L78 Accepts]: Start accepts. Automaton has 1296 states and 4530 transitions. Word has length 24 [2021-06-05 22:12:01,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:01,541 INFO L482 AbstractCegarLoop]: Abstraction has 1296 states and 4530 transitions. [2021-06-05 22:12:01,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:01,541 INFO L276 IsEmpty]: Start isEmpty. Operand 1296 states and 4530 transitions. [2021-06-05 22:12:01,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:12:01,542 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:01,542 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:01,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6124 [2021-06-05 22:12:01,742 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:01,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:01,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1355776782, now seen corresponding path program 275 times [2021-06-05 22:12:01,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:01,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354947290] [2021-06-05 22:12:01,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:01,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:01,850 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:01,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:01,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354947290] [2021-06-05 22:12:01,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354947290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:01,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089708766] [2021-06-05 22:12:01,850 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:01,956 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:12:01,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:01,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:12:01,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:02,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:02,001 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:02,022 INFO L628 ElimStorePlain]: treesize reduction 17, result has 54.1 percent of original size [2021-06-05 22:12:02,022 INFO L518 ElimStorePlain]: Eliminatee v_prenex_219 vanished before elimination [2021-06-05 22:12:02,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:12:02,022 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:20 [2021-06-05 22:12:02,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:02,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:02,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:02,076 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:02,078 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:02,078 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:02,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:02,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:02,098 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:02,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:12:02,101 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:02,127 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-05 22:12:02,127 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:12:02,128 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-05 22:12:02,164 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:12:02,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089708766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:02,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:02,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 22:12:02,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412348971] [2021-06-05 22:12:02,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:12:02,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:02,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:12:02,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:12:02,165 INFO L87 Difference]: Start difference. First operand 1296 states and 4530 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:02,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:02,557 INFO L93 Difference]: Finished difference Result 1571 states and 5344 transitions. [2021-06-05 22:12:02,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:12:02,558 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:12:02,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:02,560 INFO L225 Difference]: With dead ends: 1571 [2021-06-05 22:12:02,560 INFO L226 Difference]: Without dead ends: 1520 [2021-06-05 22:12:02,560 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 346.8ms TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:12:02,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-06-05 22:12:02,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 1335. [2021-06-05 22:12:02,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1335 states, 1334 states have (on average 3.505247376311844) internal successors, (4676), 1334 states have internal predecessors, (4676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:02,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1335 states to 1335 states and 4676 transitions. [2021-06-05 22:12:02,573 INFO L78 Accepts]: Start accepts. Automaton has 1335 states and 4676 transitions. Word has length 24 [2021-06-05 22:12:02,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:02,573 INFO L482 AbstractCegarLoop]: Abstraction has 1335 states and 4676 transitions. [2021-06-05 22:12:02,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:02,573 INFO L276 IsEmpty]: Start isEmpty. Operand 1335 states and 4676 transitions. [2021-06-05 22:12:02,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:12:02,575 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:02,575 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:02,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6168 [2021-06-05 22:12:02,775 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:02,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:02,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1763699870, now seen corresponding path program 276 times [2021-06-05 22:12:02,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:02,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146896247] [2021-06-05 22:12:02,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:02,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:02,883 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:02,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:02,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146896247] [2021-06-05 22:12:02,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146896247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:02,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73050680] [2021-06-05 22:12:02,883 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:02,987 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:12:02,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:02,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:12:02,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:03,030 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:03,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:03,053 INFO L628 ElimStorePlain]: treesize reduction 2, result has 92.3 percent of original size [2021-06-05 22:12:03,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:03,055 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:03,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:03,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:12:03,065 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:20 [2021-06-05 22:12:03,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:12:03,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:03,258 INFO L628 ElimStorePlain]: treesize reduction 49, result has 65.7 percent of original size [2021-06-05 22:12:03,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:03,261 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:03,333 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.9 percent of original size [2021-06-05 22:12:03,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:03,336 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:03,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:12:03,340 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:03,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:12:03,343 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:03,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:03,346 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:03,403 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.3 percent of original size [2021-06-05 22:12:03,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:03,406 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:03,458 INFO L628 ElimStorePlain]: treesize reduction 16, result has 76.8 percent of original size [2021-06-05 22:12:03,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:12:03,461 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:03,480 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:03,481 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 5 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:12:03,481 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:146, output treesize:34 [2021-06-05 22:12:03,553 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:12:03,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73050680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:03,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:03,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 22:12:03,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653067493] [2021-06-05 22:12:03,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:12:03,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:03,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:12:03,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:12:03,554 INFO L87 Difference]: Start difference. First operand 1335 states and 4676 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:03,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:03,926 INFO L93 Difference]: Finished difference Result 1723 states and 5814 transitions. [2021-06-05 22:12:03,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:12:03,926 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:12:03,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:03,928 INFO L225 Difference]: With dead ends: 1723 [2021-06-05 22:12:03,928 INFO L226 Difference]: Without dead ends: 1672 [2021-06-05 22:12:03,928 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 355.0ms TimeCoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:12:03,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1672 states. [2021-06-05 22:12:03,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1672 to 1363. [2021-06-05 22:12:03,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1363 states, 1362 states have (on average 3.537444933920705) internal successors, (4818), 1362 states have internal predecessors, (4818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:03,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 4818 transitions. [2021-06-05 22:12:03,943 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 4818 transitions. Word has length 24 [2021-06-05 22:12:03,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:03,943 INFO L482 AbstractCegarLoop]: Abstraction has 1363 states and 4818 transitions. [2021-06-05 22:12:03,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:03,943 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 4818 transitions. [2021-06-05 22:12:03,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:12:03,945 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:03,945 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:04,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6174 [2021-06-05 22:12:04,145 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:04,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:04,145 INFO L82 PathProgramCache]: Analyzing trace with hash -150133136, now seen corresponding path program 277 times [2021-06-05 22:12:04,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:04,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415830914] [2021-06-05 22:12:04,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:04,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:04,258 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:04,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:04,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415830914] [2021-06-05 22:12:04,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415830914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:04,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833755962] [2021-06-05 22:12:04,259 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:04,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:04,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:12:04,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:04,407 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:04,408 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:04,429 INFO L628 ElimStorePlain]: treesize reduction 2, result has 92.3 percent of original size [2021-06-05 22:12:04,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:04,432 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:04,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:04,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:12:04,442 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:20 [2021-06-05 22:12:04,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:12:04,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:04,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:12:04,575 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:04,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:12:04,592 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:04,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:04,597 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:04,600 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:04,601 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:04,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:04,606 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:04,610 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:04,610 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:04,614 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:04,615 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:04,618 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:04,618 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:04,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:04,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:04,665 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:04,718 INFO L628 ElimStorePlain]: treesize reduction 40, result has 59.6 percent of original size [2021-06-05 22:12:04,718 INFO L518 ElimStorePlain]: Eliminatee v_prenex_227 vanished before elimination [2021-06-05 22:12:04,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:12:04,721 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:04,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:04,724 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:04,762 INFO L628 ElimStorePlain]: treesize reduction 2, result has 96.2 percent of original size [2021-06-05 22:12:04,762 INFO L518 ElimStorePlain]: Eliminatee v_prenex_226 vanished before elimination [2021-06-05 22:12:04,763 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 5 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:12:04,763 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:224, output treesize:34 [2021-06-05 22:12:04,835 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:12:04,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833755962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:04,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:04,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 22:12:04,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381755329] [2021-06-05 22:12:04,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:12:04,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:04,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:12:04,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:12:04,836 INFO L87 Difference]: Start difference. First operand 1363 states and 4818 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:05,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:05,273 INFO L93 Difference]: Finished difference Result 1653 states and 5622 transitions. [2021-06-05 22:12:05,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:12:05,274 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:12:05,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:05,276 INFO L225 Difference]: With dead ends: 1653 [2021-06-05 22:12:05,276 INFO L226 Difference]: Without dead ends: 1590 [2021-06-05 22:12:05,276 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 403.7ms TimeCoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:12:05,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1590 states. [2021-06-05 22:12:05,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1590 to 1310. [2021-06-05 22:12:05,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1310 states, 1309 states have (on average 3.4935064935064934) internal successors, (4573), 1309 states have internal predecessors, (4573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:05,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1310 states to 1310 states and 4573 transitions. [2021-06-05 22:12:05,290 INFO L78 Accepts]: Start accepts. Automaton has 1310 states and 4573 transitions. Word has length 24 [2021-06-05 22:12:05,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:05,290 INFO L482 AbstractCegarLoop]: Abstraction has 1310 states and 4573 transitions. [2021-06-05 22:12:05,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:05,290 INFO L276 IsEmpty]: Start isEmpty. Operand 1310 states and 4573 transitions. [2021-06-05 22:12:05,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:12:05,291 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:05,291 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:05,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6193,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:05,492 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:05,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:05,492 INFO L82 PathProgramCache]: Analyzing trace with hash 316771726, now seen corresponding path program 278 times [2021-06-05 22:12:05,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:05,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56953808] [2021-06-05 22:12:05,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:05,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:05,717 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:05,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:05,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56953808] [2021-06-05 22:12:05,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56953808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:05,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951553923] [2021-06-05 22:12:05,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:05,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:12:05,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:05,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:12:05,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:06,053 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:12:06,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951553923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:06,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:06,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-06-05 22:12:06,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478998009] [2021-06-05 22:12:06,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:12:06,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:06,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:12:06,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:12:06,054 INFO L87 Difference]: Start difference. First operand 1310 states and 4573 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:08,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:08,587 INFO L93 Difference]: Finished difference Result 2070 states and 6696 transitions. [2021-06-05 22:12:08,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 22:12:08,587 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:12:08,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:08,591 INFO L225 Difference]: With dead ends: 2070 [2021-06-05 22:12:08,591 INFO L226 Difference]: Without dead ends: 1863 [2021-06-05 22:12:08,591 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1142 ImplicationChecksByTransitivity, 2200.3ms TimeCoverageRelationStatistics Valid=464, Invalid=3568, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 22:12:08,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1863 states. [2021-06-05 22:12:08,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1863 to 1361. [2021-06-05 22:12:08,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1361 states, 1360 states have (on average 3.522794117647059) internal successors, (4791), 1360 states have internal predecessors, (4791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:08,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1361 states to 1361 states and 4791 transitions. [2021-06-05 22:12:08,613 INFO L78 Accepts]: Start accepts. Automaton has 1361 states and 4791 transitions. Word has length 24 [2021-06-05 22:12:08,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:08,613 INFO L482 AbstractCegarLoop]: Abstraction has 1361 states and 4791 transitions. [2021-06-05 22:12:08,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:08,614 INFO L276 IsEmpty]: Start isEmpty. Operand 1361 states and 4791 transitions. [2021-06-05 22:12:08,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:12:08,615 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:08,616 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:08,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6228,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:08,817 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:08,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:08,817 INFO L82 PathProgramCache]: Analyzing trace with hash 856040988, now seen corresponding path program 279 times [2021-06-05 22:12:08,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:08,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519928376] [2021-06-05 22:12:08,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:08,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:08,924 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:08,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:08,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519928376] [2021-06-05 22:12:08,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519928376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:08,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657460034] [2021-06-05 22:12:08,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:09,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:12:09,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:09,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:12:09,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:09,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:12:09,112 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:09,183 INFO L628 ElimStorePlain]: treesize reduction 56, result has 61.1 percent of original size [2021-06-05 22:12:09,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:09,187 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:09,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:09,190 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:09,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:12:09,193 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:09,238 INFO L628 ElimStorePlain]: treesize reduction 19, result has 75.3 percent of original size [2021-06-05 22:12:09,239 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:12:09,239 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:147, output treesize:58 [2021-06-05 22:12:09,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:09,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:09,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:09,317 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:09,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:09,320 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:09,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:12:09,323 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:09,390 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.6 percent of original size [2021-06-05 22:12:09,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:09,394 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:09,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:09,397 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:09,447 INFO L628 ElimStorePlain]: treesize reduction 15, result has 79.7 percent of original size [2021-06-05 22:12:09,448 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:12:09,448 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:99, output treesize:43 [2021-06-05 22:12:09,525 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:12:09,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657460034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:09,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:09,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 22:12:09,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051247108] [2021-06-05 22:12:09,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:12:09,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:09,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:12:09,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:12:09,526 INFO L87 Difference]: Start difference. First operand 1361 states and 4791 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:10,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:10,551 INFO L93 Difference]: Finished difference Result 1718 states and 5748 transitions. [2021-06-05 22:12:10,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:12:10,551 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:12:10,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:10,553 INFO L225 Difference]: With dead ends: 1718 [2021-06-05 22:12:10,554 INFO L226 Difference]: Without dead ends: 1655 [2021-06-05 22:12:10,554 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 894.7ms TimeCoverageRelationStatistics Valid=179, Invalid=943, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:12:10,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1655 states. [2021-06-05 22:12:10,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1655 to 1342. [2021-06-05 22:12:10,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1342 states, 1341 states have (on average 3.4966442953020134) internal successors, (4689), 1341 states have internal predecessors, (4689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:10,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1342 states to 1342 states and 4689 transitions. [2021-06-05 22:12:10,568 INFO L78 Accepts]: Start accepts. Automaton has 1342 states and 4689 transitions. Word has length 24 [2021-06-05 22:12:10,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:10,568 INFO L482 AbstractCegarLoop]: Abstraction has 1342 states and 4689 transitions. [2021-06-05 22:12:10,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:10,568 INFO L276 IsEmpty]: Start isEmpty. Operand 1342 states and 4689 transitions. [2021-06-05 22:12:10,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:12:10,569 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:10,569 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:10,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6250 [2021-06-05 22:12:10,770 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:10,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:10,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1348636750, now seen corresponding path program 280 times [2021-06-05 22:12:10,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:10,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935714963] [2021-06-05 22:12:10,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:10,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:11,049 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:11,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:11,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935714963] [2021-06-05 22:12:11,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935714963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:11,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168293622] [2021-06-05 22:12:11,050 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:11,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:12:11,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:11,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:12:11,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:11,364 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:12:11,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168293622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:11,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:11,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-06-05 22:12:11,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807143938] [2021-06-05 22:12:11,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:12:11,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:11,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:12:11,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:12:11,365 INFO L87 Difference]: Start difference. First operand 1342 states and 4689 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:15,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:15,462 INFO L93 Difference]: Finished difference Result 2255 states and 7301 transitions. [2021-06-05 22:12:15,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 22:12:15,463 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:12:15,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:15,465 INFO L225 Difference]: With dead ends: 2255 [2021-06-05 22:12:15,465 INFO L226 Difference]: Without dead ends: 2058 [2021-06-05 22:12:15,466 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1649 ImplicationChecksByTransitivity, 3738.7ms TimeCoverageRelationStatistics Valid=801, Invalid=4601, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 22:12:15,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2058 states. [2021-06-05 22:12:15,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2058 to 1333. [2021-06-05 22:12:15,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1333 states, 1332 states have (on average 3.4977477477477477) internal successors, (4659), 1332 states have internal predecessors, (4659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:15,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1333 states to 1333 states and 4659 transitions. [2021-06-05 22:12:15,482 INFO L78 Accepts]: Start accepts. Automaton has 1333 states and 4659 transitions. Word has length 24 [2021-06-05 22:12:15,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:15,482 INFO L482 AbstractCegarLoop]: Abstraction has 1333 states and 4659 transitions. [2021-06-05 22:12:15,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:15,482 INFO L276 IsEmpty]: Start isEmpty. Operand 1333 states and 4659 transitions. [2021-06-05 22:12:15,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:12:15,484 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:15,484 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:15,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6266 [2021-06-05 22:12:15,684 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:15,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:15,685 INFO L82 PathProgramCache]: Analyzing trace with hash 257555664, now seen corresponding path program 281 times [2021-06-05 22:12:15,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:15,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174080325] [2021-06-05 22:12:15,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:15,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:15,868 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:12:15,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:15,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174080325] [2021-06-05 22:12:15,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174080325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:15,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069695634] [2021-06-05 22:12:15,868 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:15,975 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:12:15,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:15,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 22:12:15,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:16,175 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:12:16,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069695634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:16,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:16,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-06-05 22:12:16,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111804190] [2021-06-05 22:12:16,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:12:16,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:16,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:12:16,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:12:16,176 INFO L87 Difference]: Start difference. First operand 1333 states and 4659 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:20,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:20,299 INFO L93 Difference]: Finished difference Result 2603 states and 8192 transitions. [2021-06-05 22:12:20,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 22:12:20,299 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:12:20,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:20,302 INFO L225 Difference]: With dead ends: 2603 [2021-06-05 22:12:20,302 INFO L226 Difference]: Without dead ends: 2202 [2021-06-05 22:12:20,302 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1367 ImplicationChecksByTransitivity, 3652.3ms TimeCoverageRelationStatistics Valid=681, Invalid=4721, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 22:12:20,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2202 states. [2021-06-05 22:12:20,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2202 to 1438. [2021-06-05 22:12:20,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1438 states, 1437 states have (on average 3.405010438413361) internal successors, (4893), 1437 states have internal predecessors, (4893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:20,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1438 states to 1438 states and 4893 transitions. [2021-06-05 22:12:20,320 INFO L78 Accepts]: Start accepts. Automaton has 1438 states and 4893 transitions. Word has length 24 [2021-06-05 22:12:20,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:20,320 INFO L482 AbstractCegarLoop]: Abstraction has 1438 states and 4893 transitions. [2021-06-05 22:12:20,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:20,320 INFO L276 IsEmpty]: Start isEmpty. Operand 1438 states and 4893 transitions. [2021-06-05 22:12:20,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:12:20,321 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:20,321 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:20,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6286 [2021-06-05 22:12:20,522 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:20,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:20,522 INFO L82 PathProgramCache]: Analyzing trace with hash 668428116, now seen corresponding path program 282 times [2021-06-05 22:12:20,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:20,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729630948] [2021-06-05 22:12:20,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:20,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:20,641 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:20,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:20,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729630948] [2021-06-05 22:12:20,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729630948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:20,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978518206] [2021-06-05 22:12:20,642 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:20,747 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:12:20,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:20,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:12:20,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:20,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:20,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:20,880 INFO L628 ElimStorePlain]: treesize reduction 58, result has 58.0 percent of original size [2021-06-05 22:12:20,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:20,883 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:20,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:20,913 INFO L518 ElimStorePlain]: Eliminatee v_prenex_229 vanished before elimination [2021-06-05 22:12:20,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:12:20,916 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:20,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:20,947 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 22:12:20,947 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:142, output treesize:68 [2021-06-05 22:12:21,304 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_233, ends_with_10], 1=[ends_with_6]} [2021-06-05 22:12:21,307 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:21,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:21,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:21,312 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:21,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:21,315 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:21,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:21,319 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:21,322 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:21,322 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:21,325 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:21,325 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:21,431 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-06-05 22:12:21,431 INFO L628 ElimStorePlain]: treesize reduction 70, result has 63.9 percent of original size [2021-06-05 22:12:21,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:12:21,435 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:21,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:12:21,438 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:21,495 INFO L628 ElimStorePlain]: treesize reduction 50, result has 57.6 percent of original size [2021-06-05 22:12:21,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:21,498 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:21,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:12:21,501 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:21,533 INFO L628 ElimStorePlain]: treesize reduction 20, result has 67.2 percent of original size [2021-06-05 22:12:21,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:12:21,534 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:303, output treesize:20 [2021-06-05 22:12:21,586 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 22:12:21,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978518206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:21,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:21,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-05 22:12:21,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768416657] [2021-06-05 22:12:21,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:12:21,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:21,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:12:21,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:12:21,587 INFO L87 Difference]: Start difference. First operand 1438 states and 4893 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:23,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:23,408 INFO L93 Difference]: Finished difference Result 1986 states and 6506 transitions. [2021-06-05 22:12:23,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 22:12:23,409 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:12:23,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:23,411 INFO L225 Difference]: With dead ends: 1986 [2021-06-05 22:12:23,411 INFO L226 Difference]: Without dead ends: 1869 [2021-06-05 22:12:23,412 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 1438.4ms TimeCoverageRelationStatistics Valid=325, Invalid=2225, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 22:12:23,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1869 states. [2021-06-05 22:12:23,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1869 to 1539. [2021-06-05 22:12:23,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1539 states, 1538 states have (on average 3.4213263979193758) internal successors, (5262), 1538 states have internal predecessors, (5262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:23,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1539 states to 1539 states and 5262 transitions. [2021-06-05 22:12:23,428 INFO L78 Accepts]: Start accepts. Automaton has 1539 states and 5262 transitions. Word has length 24 [2021-06-05 22:12:23,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:23,428 INFO L482 AbstractCegarLoop]: Abstraction has 1539 states and 5262 transitions. [2021-06-05 22:12:23,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:23,429 INFO L276 IsEmpty]: Start isEmpty. Operand 1539 states and 5262 transitions. [2021-06-05 22:12:23,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:12:23,430 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:23,430 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:23,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6294,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:23,631 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:23,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:23,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1920773996, now seen corresponding path program 283 times [2021-06-05 22:12:23,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:23,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499698581] [2021-06-05 22:12:23,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:23,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:23,799 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:12:23,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:23,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499698581] [2021-06-05 22:12:23,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499698581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:23,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737128402] [2021-06-05 22:12:23,799 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:23,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:23,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 22:12:23,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:24,127 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:12:24,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737128402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:24,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:24,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-06-05 22:12:24,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536294156] [2021-06-05 22:12:24,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:12:24,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:24,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:12:24,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:12:24,128 INFO L87 Difference]: Start difference. First operand 1539 states and 5262 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:27,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:27,871 INFO L93 Difference]: Finished difference Result 3301 states and 10511 transitions. [2021-06-05 22:12:27,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 22:12:27,871 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:12:27,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:27,875 INFO L225 Difference]: With dead ends: 3301 [2021-06-05 22:12:27,875 INFO L226 Difference]: Without dead ends: 3123 [2021-06-05 22:12:27,876 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1734 ImplicationChecksByTransitivity, 3212.8ms TimeCoverageRelationStatistics Valid=843, Invalid=5319, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 22:12:27,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3123 states. [2021-06-05 22:12:27,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3123 to 1630. [2021-06-05 22:12:27,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1630 states, 1629 states have (on average 3.481890730509515) internal successors, (5672), 1629 states have internal predecessors, (5672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:27,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1630 states to 1630 states and 5672 transitions. [2021-06-05 22:12:27,903 INFO L78 Accepts]: Start accepts. Automaton has 1630 states and 5672 transitions. Word has length 24 [2021-06-05 22:12:27,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:27,903 INFO L482 AbstractCegarLoop]: Abstraction has 1630 states and 5672 transitions. [2021-06-05 22:12:27,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:27,903 INFO L276 IsEmpty]: Start isEmpty. Operand 1630 states and 5672 transitions. [2021-06-05 22:12:27,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:12:27,905 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:27,905 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:28,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6348 [2021-06-05 22:12:28,106 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:28,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:28,106 INFO L82 PathProgramCache]: Analyzing trace with hash -235535934, now seen corresponding path program 284 times [2021-06-05 22:12:28,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:28,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810222707] [2021-06-05 22:12:28,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:28,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:28,209 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:28,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:28,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810222707] [2021-06-05 22:12:28,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810222707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:28,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468089648] [2021-06-05 22:12:28,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:28,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:12:28,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:28,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 22:12:28,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:28,423 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:12:28,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468089648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:28,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:28,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-05 22:12:28,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740953913] [2021-06-05 22:12:28,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:12:28,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:28,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:12:28,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:12:28,424 INFO L87 Difference]: Start difference. First operand 1630 states and 5672 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:29,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:29,238 INFO L93 Difference]: Finished difference Result 2215 states and 7479 transitions. [2021-06-05 22:12:29,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:12:29,238 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:12:29,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:29,241 INFO L225 Difference]: With dead ends: 2215 [2021-06-05 22:12:29,241 INFO L226 Difference]: Without dead ends: 2163 [2021-06-05 22:12:29,241 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 512.6ms TimeCoverageRelationStatistics Valid=225, Invalid=1415, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:12:29,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2021-06-05 22:12:29,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 1718. [2021-06-05 22:12:29,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1718 states, 1717 states have (on average 3.4857309260337797) internal successors, (5985), 1717 states have internal predecessors, (5985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:29,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1718 states to 1718 states and 5985 transitions. [2021-06-05 22:12:29,261 INFO L78 Accepts]: Start accepts. Automaton has 1718 states and 5985 transitions. Word has length 24 [2021-06-05 22:12:29,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:29,261 INFO L482 AbstractCegarLoop]: Abstraction has 1718 states and 5985 transitions. [2021-06-05 22:12:29,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:29,261 INFO L276 IsEmpty]: Start isEmpty. Operand 1718 states and 5985 transitions. [2021-06-05 22:12:29,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:12:29,263 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:29,263 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:29,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6356 [2021-06-05 22:12:29,464 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:29,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:29,464 INFO L82 PathProgramCache]: Analyzing trace with hash -458096300, now seen corresponding path program 285 times [2021-06-05 22:12:29,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:29,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237399014] [2021-06-05 22:12:29,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:29,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:29,568 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:29,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:29,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237399014] [2021-06-05 22:12:29,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237399014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:29,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578040627] [2021-06-05 22:12:29,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:29,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:12:29,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:29,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:12:29,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:29,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:12:29,742 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:29,826 INFO L628 ElimStorePlain]: treesize reduction 31, result has 77.7 percent of original size [2021-06-05 22:12:29,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:29,829 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:29,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:29,868 INFO L518 ElimStorePlain]: Eliminatee v_prenex_236 vanished before elimination [2021-06-05 22:12:29,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:29,872 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:29,931 INFO L628 ElimStorePlain]: treesize reduction 24, result has 76.0 percent of original size [2021-06-05 22:12:29,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:12:29,934 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:29,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:29,965 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 5 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 22:12:29,965 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:142, output treesize:68 [2021-06-05 22:12:30,386 INFO L446 ElimStorePlain]: Different costs {0=[ends_with_10, v_prenex_239], 1=[ends_with_6]} [2021-06-05 22:12:30,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:12:30,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:30,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:12:30,394 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:30,486 INFO L628 ElimStorePlain]: treesize reduction 273, result has 26.8 percent of original size [2021-06-05 22:12:30,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:30,490 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:30,543 INFO L628 ElimStorePlain]: treesize reduction 26, result has 72.9 percent of original size [2021-06-05 22:12:30,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:12:30,546 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:30,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:30,549 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:30,581 INFO L628 ElimStorePlain]: treesize reduction 20, result has 68.3 percent of original size [2021-06-05 22:12:30,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:12:30,583 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 5 variables, input treesize:379, output treesize:20 [2021-06-05 22:12:30,635 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 22:12:30,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578040627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:30,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:30,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 17 [2021-06-05 22:12:30,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133445702] [2021-06-05 22:12:30,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:12:30,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:30,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:12:30,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:12:30,636 INFO L87 Difference]: Start difference. First operand 1718 states and 5985 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:32,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:32,289 INFO L93 Difference]: Finished difference Result 2520 states and 8276 transitions. [2021-06-05 22:12:32,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 22:12:32,290 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:12:32,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:32,293 INFO L225 Difference]: With dead ends: 2520 [2021-06-05 22:12:32,293 INFO L226 Difference]: Without dead ends: 2369 [2021-06-05 22:12:32,293 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 1232.8ms TimeCoverageRelationStatistics Valid=244, Invalid=2108, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 22:12:32,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2369 states. [2021-06-05 22:12:32,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2369 to 1751. [2021-06-05 22:12:32,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1751 states, 1750 states have (on average 3.4937142857142858) internal successors, (6114), 1750 states have internal predecessors, (6114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:32,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1751 states to 1751 states and 6114 transitions. [2021-06-05 22:12:32,313 INFO L78 Accepts]: Start accepts. Automaton has 1751 states and 6114 transitions. Word has length 24 [2021-06-05 22:12:32,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:32,313 INFO L482 AbstractCegarLoop]: Abstraction has 1751 states and 6114 transitions. [2021-06-05 22:12:32,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:32,313 INFO L276 IsEmpty]: Start isEmpty. Operand 1751 states and 6114 transitions. [2021-06-05 22:12:32,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:12:32,315 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:32,315 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:32,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6359,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:32,515 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:32,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:32,516 INFO L82 PathProgramCache]: Analyzing trace with hash -2039999204, now seen corresponding path program 286 times [2021-06-05 22:12:32,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:32,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571357889] [2021-06-05 22:12:32,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:32,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:32,667 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:12:32,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:32,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571357889] [2021-06-05 22:12:32,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571357889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:32,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677081847] [2021-06-05 22:12:32,667 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:32,786 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:12:32,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:32,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 22:12:32,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:32,996 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:32,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677081847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:32,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:32,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-06-05 22:12:32,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966170413] [2021-06-05 22:12:32,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:12:32,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:32,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:12:32,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:12:32,997 INFO L87 Difference]: Start difference. First operand 1751 states and 6114 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:36,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:36,609 INFO L93 Difference]: Finished difference Result 3157 states and 10097 transitions. [2021-06-05 22:12:36,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 22:12:36,609 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:12:36,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:36,614 INFO L225 Difference]: With dead ends: 3157 [2021-06-05 22:12:36,614 INFO L226 Difference]: Without dead ends: 2874 [2021-06-05 22:12:36,614 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1396 ImplicationChecksByTransitivity, 3163.6ms TimeCoverageRelationStatistics Valid=618, Invalid=4638, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 22:12:36,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2874 states. [2021-06-05 22:12:36,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2874 to 1764. [2021-06-05 22:12:36,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1764 states, 1763 states have (on average 3.4951786727169596) internal successors, (6162), 1763 states have internal predecessors, (6162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:36,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1764 states to 1764 states and 6162 transitions. [2021-06-05 22:12:36,638 INFO L78 Accepts]: Start accepts. Automaton has 1764 states and 6162 transitions. Word has length 24 [2021-06-05 22:12:36,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:36,638 INFO L482 AbstractCegarLoop]: Abstraction has 1764 states and 6162 transitions. [2021-06-05 22:12:36,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:36,638 INFO L276 IsEmpty]: Start isEmpty. Operand 1764 states and 6162 transitions. [2021-06-05 22:12:36,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:12:36,640 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:36,640 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:36,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6443 [2021-06-05 22:12:36,840 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:36,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:36,840 INFO L82 PathProgramCache]: Analyzing trace with hash 133379628, now seen corresponding path program 287 times [2021-06-05 22:12:36,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:36,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964585470] [2021-06-05 22:12:36,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:36,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:36,995 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:12:36,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:36,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964585470] [2021-06-05 22:12:36,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964585470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:36,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923538429] [2021-06-05 22:12:36,995 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:37,104 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:12:37,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:37,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 22:12:37,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:37,314 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:37,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923538429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:37,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:37,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-06-05 22:12:37,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110545034] [2021-06-05 22:12:37,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:12:37,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:37,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:12:37,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:12:37,315 INFO L87 Difference]: Start difference. First operand 1764 states and 6162 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:42,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:42,103 INFO L93 Difference]: Finished difference Result 3655 states and 11498 transitions. [2021-06-05 22:12:42,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 22:12:42,103 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:12:42,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:42,108 INFO L225 Difference]: With dead ends: 3655 [2021-06-05 22:12:42,108 INFO L226 Difference]: Without dead ends: 3430 [2021-06-05 22:12:42,108 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2195 ImplicationChecksByTransitivity, 4049.0ms TimeCoverageRelationStatistics Valid=873, Invalid=6609, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 22:12:42,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3430 states. [2021-06-05 22:12:42,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3430 to 1749. [2021-06-05 22:12:42,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1749 states, 1748 states have (on average 3.482265446224256) internal successors, (6087), 1748 states have internal predecessors, (6087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:42,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1749 states to 1749 states and 6087 transitions. [2021-06-05 22:12:42,133 INFO L78 Accepts]: Start accepts. Automaton has 1749 states and 6087 transitions. Word has length 24 [2021-06-05 22:12:42,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:42,133 INFO L482 AbstractCegarLoop]: Abstraction has 1749 states and 6087 transitions. [2021-06-05 22:12:42,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:42,133 INFO L276 IsEmpty]: Start isEmpty. Operand 1749 states and 6087 transitions. [2021-06-05 22:12:42,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:12:42,135 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:42,135 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:42,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6449,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:42,336 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:42,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:42,336 INFO L82 PathProgramCache]: Analyzing trace with hash -269481576, now seen corresponding path program 288 times [2021-06-05 22:12:42,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:42,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591682249] [2021-06-05 22:12:42,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:42,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:42,454 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:12:42,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:42,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591682249] [2021-06-05 22:12:42,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591682249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:42,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876890200] [2021-06-05 22:12:42,455 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:42,569 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:12:42,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:42,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 22:12:42,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:42,798 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:42,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876890200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:42,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:42,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-06-05 22:12:42,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206115206] [2021-06-05 22:12:42,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:12:42,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:42,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:12:42,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:12:42,799 INFO L87 Difference]: Start difference. First operand 1749 states and 6087 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:45,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:45,023 INFO L93 Difference]: Finished difference Result 2734 states and 8909 transitions. [2021-06-05 22:12:45,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 22:12:45,024 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:12:45,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:45,027 INFO L225 Difference]: With dead ends: 2734 [2021-06-05 22:12:45,027 INFO L226 Difference]: Without dead ends: 2513 [2021-06-05 22:12:45,027 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1773.6ms TimeCoverageRelationStatistics Valid=387, Invalid=2919, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 22:12:45,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2513 states. [2021-06-05 22:12:45,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2513 to 1670. [2021-06-05 22:12:45,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1670 states, 1669 states have (on average 3.4703415218693827) internal successors, (5792), 1669 states have internal predecessors, (5792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:45,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1670 states to 1670 states and 5792 transitions. [2021-06-05 22:12:45,048 INFO L78 Accepts]: Start accepts. Automaton has 1670 states and 5792 transitions. Word has length 24 [2021-06-05 22:12:45,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:45,048 INFO L482 AbstractCegarLoop]: Abstraction has 1670 states and 5792 transitions. [2021-06-05 22:12:45,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:45,048 INFO L276 IsEmpty]: Start isEmpty. Operand 1670 states and 5792 transitions. [2021-06-05 22:12:45,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:12:45,050 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:45,050 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:45,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6459 [2021-06-05 22:12:45,250 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:45,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:45,251 INFO L82 PathProgramCache]: Analyzing trace with hash 348529114, now seen corresponding path program 289 times [2021-06-05 22:12:45,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:45,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497812975] [2021-06-05 22:12:45,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:45,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:45,350 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:45,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:45,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497812975] [2021-06-05 22:12:45,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497812975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:45,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327849111] [2021-06-05 22:12:45,351 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:45,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:45,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:12:45,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:45,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:45,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:45,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:45,534 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:45,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:45,536 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:45,572 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-06-05 22:12:45,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:45,575 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:45,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:12:45,577 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:45,603 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-05 22:12:45,603 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:12:45,604 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-05 22:12:45,647 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:12:45,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327849111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:45,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:45,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 14 [2021-06-05 22:12:45,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283226020] [2021-06-05 22:12:45,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:12:45,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:45,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:12:45,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:12:45,647 INFO L87 Difference]: Start difference. First operand 1670 states and 5792 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:46,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:46,051 INFO L93 Difference]: Finished difference Result 1982 states and 6731 transitions. [2021-06-05 22:12:46,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:12:46,052 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:12:46,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:46,054 INFO L225 Difference]: With dead ends: 1982 [2021-06-05 22:12:46,054 INFO L226 Difference]: Without dead ends: 1904 [2021-06-05 22:12:46,054 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 325.3ms TimeCoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:12:46,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1904 states. [2021-06-05 22:12:46,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1904 to 1686. [2021-06-05 22:12:46,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1686 states, 1685 states have (on average 3.4735905044510385) internal successors, (5853), 1685 states have internal predecessors, (5853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:46,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 5853 transitions. [2021-06-05 22:12:46,071 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 5853 transitions. Word has length 24 [2021-06-05 22:12:46,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:46,071 INFO L482 AbstractCegarLoop]: Abstraction has 1686 states and 5853 transitions. [2021-06-05 22:12:46,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:46,071 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 5853 transitions. [2021-06-05 22:12:46,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:12:46,073 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:46,073 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:46,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6467,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:46,273 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:46,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:46,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1865966586, now seen corresponding path program 290 times [2021-06-05 22:12:46,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:46,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358582205] [2021-06-05 22:12:46,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:46,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:46,370 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:46,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:46,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358582205] [2021-06-05 22:12:46,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358582205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:46,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183879563] [2021-06-05 22:12:46,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:46,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:12:46,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:46,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:12:46,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:46,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:46,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:46,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:46,554 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:46,556 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:46,556 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:46,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:46,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:46,576 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:46,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:12:46,579 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:46,619 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-05 22:12:46,620 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:12:46,620 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-05 22:12:46,664 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:12:46,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183879563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:46,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:46,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 15 [2021-06-05 22:12:46,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737651746] [2021-06-05 22:12:46,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:12:46,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:46,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:12:46,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:12:46,665 INFO L87 Difference]: Start difference. First operand 1686 states and 5853 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:47,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:47,039 INFO L93 Difference]: Finished difference Result 2113 states and 7151 transitions. [2021-06-05 22:12:47,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:12:47,039 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:12:47,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:47,041 INFO L225 Difference]: With dead ends: 2113 [2021-06-05 22:12:47,041 INFO L226 Difference]: Without dead ends: 2044 [2021-06-05 22:12:47,041 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 328.6ms TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:12:47,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2044 states. [2021-06-05 22:12:47,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2044 to 1716. [2021-06-05 22:12:47,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1716 states, 1715 states have (on average 3.4816326530612245) internal successors, (5971), 1715 states have internal predecessors, (5971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:47,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1716 states to 1716 states and 5971 transitions. [2021-06-05 22:12:47,059 INFO L78 Accepts]: Start accepts. Automaton has 1716 states and 5971 transitions. Word has length 24 [2021-06-05 22:12:47,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:47,059 INFO L482 AbstractCegarLoop]: Abstraction has 1716 states and 5971 transitions. [2021-06-05 22:12:47,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:47,059 INFO L276 IsEmpty]: Start isEmpty. Operand 1716 states and 5971 transitions. [2021-06-05 22:12:47,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:12:47,061 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:47,061 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:47,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6474 [2021-06-05 22:12:47,261 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:47,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:47,261 INFO L82 PathProgramCache]: Analyzing trace with hash -690475942, now seen corresponding path program 291 times [2021-06-05 22:12:47,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:47,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126628709] [2021-06-05 22:12:47,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:47,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:47,358 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:47,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:47,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126628709] [2021-06-05 22:12:47,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126628709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:47,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827267302] [2021-06-05 22:12:47,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:47,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:12:47,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:47,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:12:47,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:47,589 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:12:47,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827267302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:47,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:47,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 22:12:47,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463414824] [2021-06-05 22:12:47,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:12:47,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:47,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:12:47,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:12:47,590 INFO L87 Difference]: Start difference. First operand 1716 states and 5971 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:47,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:47,971 INFO L93 Difference]: Finished difference Result 2181 states and 7378 transitions. [2021-06-05 22:12:47,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:12:47,972 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:12:47,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:47,974 INFO L225 Difference]: With dead ends: 2181 [2021-06-05 22:12:47,974 INFO L226 Difference]: Without dead ends: 2121 [2021-06-05 22:12:47,975 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 304.5ms TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:12:47,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2121 states. [2021-06-05 22:12:47,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2121 to 1750. [2021-06-05 22:12:47,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1750 states, 1749 states have (on average 3.509433962264151) internal successors, (6138), 1749 states have internal predecessors, (6138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:47,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1750 states to 1750 states and 6138 transitions. [2021-06-05 22:12:47,995 INFO L78 Accepts]: Start accepts. Automaton has 1750 states and 6138 transitions. Word has length 24 [2021-06-05 22:12:47,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:47,995 INFO L482 AbstractCegarLoop]: Abstraction has 1750 states and 6138 transitions. [2021-06-05 22:12:47,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:47,995 INFO L276 IsEmpty]: Start isEmpty. Operand 1750 states and 6138 transitions. [2021-06-05 22:12:47,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:12:47,997 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:47,997 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:48,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6481,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:48,197 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:48,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:48,198 INFO L82 PathProgramCache]: Analyzing trace with hash 923090792, now seen corresponding path program 292 times [2021-06-05 22:12:48,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:48,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692106245] [2021-06-05 22:12:48,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:48,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:48,291 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:48,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:48,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692106245] [2021-06-05 22:12:48,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692106245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:48,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628138588] [2021-06-05 22:12:48,292 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:48,408 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:12:48,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:48,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:12:48,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:48,558 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:12:48,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628138588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:48,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:48,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 22:12:48,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253457088] [2021-06-05 22:12:48,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:12:48,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:48,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:12:48,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:12:48,559 INFO L87 Difference]: Start difference. First operand 1750 states and 6138 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:48,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:48,927 INFO L93 Difference]: Finished difference Result 2037 states and 6922 transitions. [2021-06-05 22:12:48,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:12:48,928 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:12:48,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:48,930 INFO L225 Difference]: With dead ends: 2037 [2021-06-05 22:12:48,930 INFO L226 Difference]: Without dead ends: 1968 [2021-06-05 22:12:48,930 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 306.8ms TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:12:48,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1968 states. [2021-06-05 22:12:48,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1968 to 1662. [2021-06-05 22:12:48,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1662 states, 1661 states have (on average 3.4659843467790488) internal successors, (5757), 1661 states have internal predecessors, (5757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:48,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1662 states to 1662 states and 5757 transitions. [2021-06-05 22:12:48,948 INFO L78 Accepts]: Start accepts. Automaton has 1662 states and 5757 transitions. Word has length 24 [2021-06-05 22:12:48,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:48,960 INFO L482 AbstractCegarLoop]: Abstraction has 1662 states and 5757 transitions. [2021-06-05 22:12:48,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:48,961 INFO L276 IsEmpty]: Start isEmpty. Operand 1662 states and 5757 transitions. [2021-06-05 22:12:48,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:12:48,963 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:48,963 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:49,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6489,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:49,163 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:49,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:49,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1795856550, now seen corresponding path program 293 times [2021-06-05 22:12:49,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:49,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873427704] [2021-06-05 22:12:49,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:49,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:49,256 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:49,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:49,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873427704] [2021-06-05 22:12:49,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873427704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:49,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225576218] [2021-06-05 22:12:49,256 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:49,366 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:12:49,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:49,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:12:49,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:49,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:49,403 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:49,422 INFO L628 ElimStorePlain]: treesize reduction 2, result has 90.9 percent of original size [2021-06-05 22:12:49,422 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:12:49,422 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:20 [2021-06-05 22:12:49,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:49,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:49,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:49,472 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:49,474 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:49,474 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:49,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:49,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:49,495 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:49,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:12:49,497 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:49,523 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-05 22:12:49,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:12:49,524 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-05 22:12:49,568 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:12:49,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225576218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:49,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:49,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 15 [2021-06-05 22:12:49,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957353795] [2021-06-05 22:12:49,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:12:49,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:49,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:12:49,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:12:49,569 INFO L87 Difference]: Start difference. First operand 1662 states and 5757 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:49,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:49,909 INFO L93 Difference]: Finished difference Result 1959 states and 6670 transitions. [2021-06-05 22:12:49,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:12:49,909 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:12:49,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:49,912 INFO L225 Difference]: With dead ends: 1959 [2021-06-05 22:12:49,912 INFO L226 Difference]: Without dead ends: 1890 [2021-06-05 22:12:49,912 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 310.2ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:12:49,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1890 states. [2021-06-05 22:12:49,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1890 to 1713. [2021-06-05 22:12:49,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1713 states, 1712 states have (on average 3.4696261682242993) internal successors, (5940), 1712 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:49,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1713 states to 1713 states and 5940 transitions. [2021-06-05 22:12:49,930 INFO L78 Accepts]: Start accepts. Automaton has 1713 states and 5940 transitions. Word has length 24 [2021-06-05 22:12:49,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:49,930 INFO L482 AbstractCegarLoop]: Abstraction has 1713 states and 5940 transitions. [2021-06-05 22:12:49,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:49,930 INFO L276 IsEmpty]: Start isEmpty. Operand 1713 states and 5940 transitions. [2021-06-05 22:12:49,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:12:49,932 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:49,932 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:50,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6500,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:50,132 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:50,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:50,132 INFO L82 PathProgramCache]: Analyzing trace with hash -620365906, now seen corresponding path program 294 times [2021-06-05 22:12:50,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:50,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25702049] [2021-06-05 22:12:50,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:50,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:50,231 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:50,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:50,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25702049] [2021-06-05 22:12:50,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25702049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:50,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295856674] [2021-06-05 22:12:50,232 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:50,341 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:12:50,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:50,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:12:50,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:50,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:50,392 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,411 INFO L628 ElimStorePlain]: treesize reduction 2, result has 90.9 percent of original size [2021-06-05 22:12:50,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:12:50,412 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:20 [2021-06-05 22:12:50,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:50,540 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:50,543 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:50,547 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:12:50,551 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,553 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,554 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:50,557 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,560 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:50,560 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:12:50,563 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,635 INFO L628 ElimStorePlain]: treesize reduction 43, result has 65.9 percent of original size [2021-06-05 22:12:50,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:12:50,639 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:50,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:50,683 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:12:50,686 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,741 INFO L628 ElimStorePlain]: treesize reduction 3, result has 95.9 percent of original size [2021-06-05 22:12:50,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:50,744 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:50,782 INFO L628 ElimStorePlain]: treesize reduction 16, result has 75.8 percent of original size [2021-06-05 22:12:50,783 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:12:50,783 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:201, output treesize:34 [2021-06-05 22:12:50,855 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:12:50,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295856674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:50,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:50,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 22:12:50,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54178870] [2021-06-05 22:12:50,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:12:50,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:50,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:12:50,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:12:50,856 INFO L87 Difference]: Start difference. First operand 1713 states and 5940 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:51,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:51,251 INFO L93 Difference]: Finished difference Result 2126 states and 7197 transitions. [2021-06-05 22:12:51,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:12:51,251 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:12:51,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:51,254 INFO L225 Difference]: With dead ends: 2126 [2021-06-05 22:12:51,254 INFO L226 Difference]: Without dead ends: 2066 [2021-06-05 22:12:51,254 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 343.5ms TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:12:51,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2066 states. [2021-06-05 22:12:51,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2066 to 1747. [2021-06-05 22:12:51,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1747 states, 1746 states have (on average 3.497709049255441) internal successors, (6107), 1746 states have internal predecessors, (6107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:51,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1747 states to 1747 states and 6107 transitions. [2021-06-05 22:12:51,272 INFO L78 Accepts]: Start accepts. Automaton has 1747 states and 6107 transitions. Word has length 24 [2021-06-05 22:12:51,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:51,272 INFO L482 AbstractCegarLoop]: Abstraction has 1747 states and 6107 transitions. [2021-06-05 22:12:51,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:51,272 INFO L276 IsEmpty]: Start isEmpty. Operand 1747 states and 6107 transitions. [2021-06-05 22:12:51,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:12:51,274 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:51,274 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:51,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6508 [2021-06-05 22:12:51,475 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:51,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:51,475 INFO L82 PathProgramCache]: Analyzing trace with hash 993200828, now seen corresponding path program 295 times [2021-06-05 22:12:51,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:51,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703367447] [2021-06-05 22:12:51,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:51,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:51,592 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:51,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:51,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703367447] [2021-06-05 22:12:51,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703367447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:51,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851683584] [2021-06-05 22:12:51,592 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:51,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:51,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:12:51,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:51,735 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:51,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:51,758 INFO L628 ElimStorePlain]: treesize reduction 2, result has 92.3 percent of original size [2021-06-05 22:12:51,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:51,760 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:51,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:51,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:12:51,770 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:20 [2021-06-05 22:12:51,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:51,899 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:51,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:12:51,903 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:51,905 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:51,905 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:51,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:51,909 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:51,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:51,912 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:51,964 INFO L628 ElimStorePlain]: treesize reduction 43, result has 59.0 percent of original size [2021-06-05 22:12:51,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:12:51,967 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:51,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:51,970 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:51,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:51,973 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:52,011 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.0 percent of original size [2021-06-05 22:12:52,011 INFO L518 ElimStorePlain]: Eliminatee ends_with_10 vanished before elimination [2021-06-05 22:12:52,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:12:52,012 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:146, output treesize:34 [2021-06-05 22:12:52,083 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:12:52,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851683584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:52,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:52,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 22:12:52,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026401288] [2021-06-05 22:12:52,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:12:52,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:52,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:12:52,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:12:52,084 INFO L87 Difference]: Start difference. First operand 1747 states and 6107 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:52,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:52,451 INFO L93 Difference]: Finished difference Result 1982 states and 6741 transitions. [2021-06-05 22:12:52,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:12:52,451 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:12:52,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:52,454 INFO L225 Difference]: With dead ends: 1982 [2021-06-05 22:12:52,454 INFO L226 Difference]: Without dead ends: 1915 [2021-06-05 22:12:52,454 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 343.2ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:12:52,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1915 states. [2021-06-05 22:12:52,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1915 to 1683. [2021-06-05 22:12:52,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1683 states, 1682 states have (on average 3.460166468489893) internal successors, (5820), 1682 states have internal predecessors, (5820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:52,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1683 states to 1683 states and 5820 transitions. [2021-06-05 22:12:52,484 INFO L78 Accepts]: Start accepts. Automaton has 1683 states and 5820 transitions. Word has length 24 [2021-06-05 22:12:52,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:52,484 INFO L482 AbstractCegarLoop]: Abstraction has 1683 states and 5820 transitions. [2021-06-05 22:12:52,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:52,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1683 states and 5820 transitions. [2021-06-05 22:12:52,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:12:52,486 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:52,486 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:52,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6551 [2021-06-05 22:12:52,686 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:52,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:52,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1460105690, now seen corresponding path program 296 times [2021-06-05 22:12:52,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:52,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205202262] [2021-06-05 22:12:52,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:52,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:52,786 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:52,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:52,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205202262] [2021-06-05 22:12:52,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205202262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:52,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369644996] [2021-06-05 22:12:52,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:52,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:12:52,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:52,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:12:52,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:52,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:52,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:52,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:12:52,957 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:53,007 INFO L628 ElimStorePlain]: treesize reduction 26, result has 70.5 percent of original size [2021-06-05 22:12:53,008 INFO L518 ElimStorePlain]: Eliminatee v_prenex_244 vanished before elimination [2021-06-05 22:12:53,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:53,011 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:53,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:53,034 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:12:53,034 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:95, output treesize:58 [2021-06-05 22:12:53,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:12:53,107 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:53,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:53,110 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:53,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:53,113 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:53,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:53,116 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:53,184 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.6 percent of original size [2021-06-05 22:12:53,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:53,187 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:53,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:53,190 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:53,240 INFO L628 ElimStorePlain]: treesize reduction 15, result has 79.7 percent of original size [2021-06-05 22:12:53,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:12:53,241 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:99, output treesize:43 [2021-06-05 22:12:53,318 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:12:53,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369644996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:53,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:53,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 22:12:53,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237266930] [2021-06-05 22:12:53,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:12:53,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:53,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:12:53,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:12:53,319 INFO L87 Difference]: Start difference. First operand 1683 states and 5820 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:53,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:53,681 INFO L93 Difference]: Finished difference Result 2009 states and 6829 transitions. [2021-06-05 22:12:53,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:12:53,681 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:12:53,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:53,684 INFO L225 Difference]: With dead ends: 2009 [2021-06-05 22:12:53,684 INFO L226 Difference]: Without dead ends: 1949 [2021-06-05 22:12:53,684 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 364.1ms TimeCoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:12:53,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1949 states. [2021-06-05 22:12:53,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1949 to 1736. [2021-06-05 22:12:53,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1736 states, 1735 states have (on average 3.4933717579250723) internal successors, (6061), 1735 states have internal predecessors, (6061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:53,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1736 states to 1736 states and 6061 transitions. [2021-06-05 22:12:53,715 INFO L78 Accepts]: Start accepts. Automaton has 1736 states and 6061 transitions. Word has length 24 [2021-06-05 22:12:53,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:53,715 INFO L482 AbstractCegarLoop]: Abstraction has 1736 states and 6061 transitions. [2021-06-05 22:12:53,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:53,716 INFO L276 IsEmpty]: Start isEmpty. Operand 1736 states and 6061 transitions. [2021-06-05 22:12:53,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:12:53,717 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:53,718 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:53,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6593 [2021-06-05 22:12:53,918 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:53,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:53,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1221294872, now seen corresponding path program 297 times [2021-06-05 22:12:53,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:53,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38391679] [2021-06-05 22:12:53,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:53,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:54,023 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:54,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:54,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38391679] [2021-06-05 22:12:54,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38391679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:54,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662677743] [2021-06-05 22:12:54,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:54,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:12:54,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:54,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:12:54,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:54,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:12:54,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:54,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:54,228 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:54,278 INFO L628 ElimStorePlain]: treesize reduction 26, result has 70.5 percent of original size [2021-06-05 22:12:54,278 INFO L518 ElimStorePlain]: Eliminatee v_prenex_246 vanished before elimination [2021-06-05 22:12:54,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:54,281 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:54,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:54,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:12:54,305 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:95, output treesize:58 [2021-06-05 22:12:54,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:54,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:54,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:54,377 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:54,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:54,381 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:54,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:12:54,384 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:54,451 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.6 percent of original size [2021-06-05 22:12:54,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:54,455 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:54,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:54,458 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:54,507 INFO L628 ElimStorePlain]: treesize reduction 15, result has 79.7 percent of original size [2021-06-05 22:12:54,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:12:54,509 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:99, output treesize:43 [2021-06-05 22:12:54,583 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:12:54,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662677743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:54,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:54,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 22:12:54,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623439211] [2021-06-05 22:12:54,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:12:54,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:54,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:12:54,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:12:54,584 INFO L87 Difference]: Start difference. First operand 1736 states and 6061 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:55,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:55,005 INFO L93 Difference]: Finished difference Result 2012 states and 6773 transitions. [2021-06-05 22:12:55,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:12:55,006 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:12:55,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:55,009 INFO L225 Difference]: With dead ends: 2012 [2021-06-05 22:12:55,009 INFO L226 Difference]: Without dead ends: 1947 [2021-06-05 22:12:55,009 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 445.2ms TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:12:55,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1947 states. [2021-06-05 22:12:55,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1947 to 1705. [2021-06-05 22:12:55,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1705 states, 1704 states have (on average 3.466549295774648) internal successors, (5907), 1704 states have internal predecessors, (5907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:55,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1705 states to 1705 states and 5907 transitions. [2021-06-05 22:12:55,028 INFO L78 Accepts]: Start accepts. Automaton has 1705 states and 5907 transitions. Word has length 24 [2021-06-05 22:12:55,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:55,028 INFO L482 AbstractCegarLoop]: Abstraction has 1705 states and 5907 transitions. [2021-06-05 22:12:55,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:55,028 INFO L276 IsEmpty]: Start isEmpty. Operand 1705 states and 5907 transitions. [2021-06-05 22:12:55,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:12:55,030 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:55,030 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:55,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6612,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:55,230 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:55,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:55,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1554633626, now seen corresponding path program 298 times [2021-06-05 22:12:55,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:55,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729942542] [2021-06-05 22:12:55,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:55,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:55,384 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:55,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:55,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729942542] [2021-06-05 22:12:55,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729942542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:55,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629010537] [2021-06-05 22:12:55,385 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:55,497 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:12:55,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:55,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:12:55,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:55,715 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:12:55,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629010537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:55,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:55,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 22:12:55,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734226139] [2021-06-05 22:12:55,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:12:55,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:55,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:12:55,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:12:55,715 INFO L87 Difference]: Start difference. First operand 1705 states and 5907 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:56,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:56,578 INFO L93 Difference]: Finished difference Result 1993 states and 6667 transitions. [2021-06-05 22:12:56,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:12:56,578 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:12:56,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:56,581 INFO L225 Difference]: With dead ends: 1993 [2021-06-05 22:12:56,581 INFO L226 Difference]: Without dead ends: 1894 [2021-06-05 22:12:56,581 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 718.0ms TimeCoverageRelationStatistics Valid=155, Invalid=1177, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:12:56,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1894 states. [2021-06-05 22:12:56,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1894 to 1654. [2021-06-05 22:12:56,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1654 states, 1653 states have (on average 3.468844525105868) internal successors, (5734), 1653 states have internal predecessors, (5734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:56,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 5734 transitions. [2021-06-05 22:12:56,599 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 5734 transitions. Word has length 24 [2021-06-05 22:12:56,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:56,599 INFO L482 AbstractCegarLoop]: Abstraction has 1654 states and 5734 transitions. [2021-06-05 22:12:56,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:56,599 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 5734 transitions. [2021-06-05 22:12:56,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:12:56,613 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:56,613 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:56,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6631 [2021-06-05 22:12:56,814 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:56,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:56,814 INFO L82 PathProgramCache]: Analyzing trace with hash 377554566, now seen corresponding path program 299 times [2021-06-05 22:12:56,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:56,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519549578] [2021-06-05 22:12:56,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:56,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:56,914 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:56,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:56,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519549578] [2021-06-05 22:12:56,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519549578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:56,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022957086] [2021-06-05 22:12:56,915 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:57,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:12:57,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:57,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:12:57,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:57,062 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:57,062 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:57,084 INFO L628 ElimStorePlain]: treesize reduction 2, result has 92.3 percent of original size [2021-06-05 22:12:57,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:57,087 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:57,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:57,096 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:12:57,096 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:20 [2021-06-05 22:12:57,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:57,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:57,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:57,161 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:57,163 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:57,164 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:57,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:57,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:57,188 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:57,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:12:57,190 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:57,216 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-05 22:12:57,217 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:12:57,217 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-05 22:12:57,261 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:12:57,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022957086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:57,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:57,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 15 [2021-06-05 22:12:57,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74155612] [2021-06-05 22:12:57,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:12:57,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:57,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:12:57,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:12:57,262 INFO L87 Difference]: Start difference. First operand 1654 states and 5734 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:57,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:57,678 INFO L93 Difference]: Finished difference Result 1946 states and 6629 transitions. [2021-06-05 22:12:57,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:12:57,678 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:12:57,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:57,681 INFO L225 Difference]: With dead ends: 1946 [2021-06-05 22:12:57,681 INFO L226 Difference]: Without dead ends: 1877 [2021-06-05 22:12:57,681 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 334.8ms TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:12:57,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1877 states. [2021-06-05 22:12:57,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1877 to 1700. [2021-06-05 22:12:57,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1700 states, 1699 states have (on average 3.472042377869335) internal successors, (5899), 1699 states have internal predecessors, (5899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:57,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1700 states to 1700 states and 5899 transitions. [2021-06-05 22:12:57,700 INFO L78 Accepts]: Start accepts. Automaton has 1700 states and 5899 transitions. Word has length 24 [2021-06-05 22:12:57,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:57,700 INFO L482 AbstractCegarLoop]: Abstraction has 1700 states and 5899 transitions. [2021-06-05 22:12:57,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:57,700 INFO L276 IsEmpty]: Start isEmpty. Operand 1700 states and 5899 transitions. [2021-06-05 22:12:57,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:12:57,702 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:57,702 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:57,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6650,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:57,902 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:57,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:57,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1553045210, now seen corresponding path program 300 times [2021-06-05 22:12:57,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:57,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643907431] [2021-06-05 22:12:57,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:57,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:57,999 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:57,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:57,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643907431] [2021-06-05 22:12:57,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643907431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:57,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657459624] [2021-06-05 22:12:57,999 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:58,108 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:12:58,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:12:58,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:12:58,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:58,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:58,145 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,164 INFO L628 ElimStorePlain]: treesize reduction 2, result has 90.9 percent of original size [2021-06-05 22:12:58,165 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:12:58,165 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:20 [2021-06-05 22:12:58,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:58,261 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:12:58,264 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,267 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,267 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:12:58,271 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:58,275 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,277 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:12:58,278 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:12:58,281 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:58,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:12:58,328 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,395 INFO L628 ElimStorePlain]: treesize reduction 20, result has 80.0 percent of original size [2021-06-05 22:12:58,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:58,398 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,455 INFO L628 ElimStorePlain]: treesize reduction 3, result has 96.1 percent of original size [2021-06-05 22:12:58,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:12:58,459 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:58,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:58,488 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:58,525 INFO L628 ElimStorePlain]: treesize reduction 16, result has 75.8 percent of original size [2021-06-05 22:12:58,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 5 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:12:58,526 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 6 variables, input treesize:169, output treesize:34 [2021-06-05 22:12:58,596 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:12:58,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657459624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:58,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:58,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 22:12:58,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131539086] [2021-06-05 22:12:58,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:12:58,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:58,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:12:58,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:12:58,596 INFO L87 Difference]: Start difference. First operand 1700 states and 5899 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:59,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:12:59,019 INFO L93 Difference]: Finished difference Result 2113 states and 7156 transitions. [2021-06-05 22:12:59,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:12:59,019 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:12:59,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:12:59,022 INFO L225 Difference]: With dead ends: 2113 [2021-06-05 22:12:59,022 INFO L226 Difference]: Without dead ends: 2053 [2021-06-05 22:12:59,022 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 361.0ms TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:12:59,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2053 states. [2021-06-05 22:12:59,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2053 to 1734. [2021-06-05 22:12:59,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1734 states, 1733 states have (on average 3.500288517022504) internal successors, (6066), 1733 states have internal predecessors, (6066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:59,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 6066 transitions. [2021-06-05 22:12:59,040 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 6066 transitions. Word has length 24 [2021-06-05 22:12:59,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:12:59,040 INFO L482 AbstractCegarLoop]: Abstraction has 1734 states and 6066 transitions. [2021-06-05 22:12:59,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:12:59,040 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 6066 transitions. [2021-06-05 22:12:59,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:12:59,042 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:12:59,042 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:12:59,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6657,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:59,242 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:12:59,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:12:59,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1128355352, now seen corresponding path program 301 times [2021-06-05 22:12:59,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:12:59,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210894831] [2021-06-05 22:12:59,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:12:59,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:59,435 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:12:59,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:12:59,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210894831] [2021-06-05 22:12:59,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210894831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:59,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087529599] [2021-06-05 22:12:59,435 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:12:59,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:12:59,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:12:59,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:12:59,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:12:59,622 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:12:59,631 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:12:59,632 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-05 22:12:59,632 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:20 [2021-06-05 22:12:59,857 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:12:59,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087529599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:12:59,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:12:59,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 22:12:59,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975465446] [2021-06-05 22:12:59,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:12:59,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:12:59,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:12:59,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:12:59,858 INFO L87 Difference]: Start difference. First operand 1734 states and 6066 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:01,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:01,444 INFO L93 Difference]: Finished difference Result 2180 states and 7268 transitions. [2021-06-05 22:13:01,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:13:01,444 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:13:01,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:01,447 INFO L225 Difference]: With dead ends: 2180 [2021-06-05 22:13:01,447 INFO L226 Difference]: Without dead ends: 2099 [2021-06-05 22:13:01,447 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 1246.2ms TimeCoverageRelationStatistics Valid=231, Invalid=1749, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 22:13:01,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2099 states. [2021-06-05 22:13:01,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2099 to 1670. [2021-06-05 22:13:01,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1670 states, 1669 states have (on average 3.4625524266027563) internal successors, (5779), 1669 states have internal predecessors, (5779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:01,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1670 states to 1670 states and 5779 transitions. [2021-06-05 22:13:01,464 INFO L78 Accepts]: Start accepts. Automaton has 1670 states and 5779 transitions. Word has length 24 [2021-06-05 22:13:01,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:01,465 INFO L482 AbstractCegarLoop]: Abstraction has 1670 states and 5779 transitions. [2021-06-05 22:13:01,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:01,465 INFO L276 IsEmpty]: Start isEmpty. Operand 1670 states and 5779 transitions. [2021-06-05 22:13:01,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:13:01,466 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:01,466 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:01,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 303 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6672 [2021-06-05 22:13:01,667 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:01,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:01,667 INFO L82 PathProgramCache]: Analyzing trace with hash -661450490, now seen corresponding path program 302 times [2021-06-05 22:13:01,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:01,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571846596] [2021-06-05 22:13:01,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:01,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:01,765 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:13:01,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:01,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571846596] [2021-06-05 22:13:01,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571846596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:01,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213243627] [2021-06-05 22:13:01,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:01,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:13:01,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:13:01,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:13:01,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:01,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:13:01,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:02,010 INFO L628 ElimStorePlain]: treesize reduction 53, result has 62.4 percent of original size [2021-06-05 22:13:02,011 INFO L518 ElimStorePlain]: Eliminatee v_prenex_253 vanished before elimination [2021-06-05 22:13:02,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:13:02,014 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:02,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:13:02,017 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:02,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:02,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:13:02,051 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:02,097 INFO L628 ElimStorePlain]: treesize reduction 19, result has 75.3 percent of original size [2021-06-05 22:13:02,097 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:13:02,097 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:144, output treesize:58 [2021-06-05 22:13:02,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:13:02,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:02,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:13:02,170 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:02,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:13:02,173 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:02,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:13:02,176 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:02,244 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.6 percent of original size [2021-06-05 22:13:02,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:13:02,248 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:02,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:13:02,250 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:02,300 INFO L628 ElimStorePlain]: treesize reduction 15, result has 79.7 percent of original size [2021-06-05 22:13:02,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:13:02,302 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:99, output treesize:43 [2021-06-05 22:13:02,377 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:13:02,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213243627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:02,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:02,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 22:13:02,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600406549] [2021-06-05 22:13:02,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:13:02,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:02,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:13:02,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:13:02,378 INFO L87 Difference]: Start difference. First operand 1670 states and 5779 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:02,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:02,811 INFO L93 Difference]: Finished difference Result 1989 states and 6754 transitions. [2021-06-05 22:13:02,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:13:02,811 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:13:02,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:02,814 INFO L225 Difference]: With dead ends: 1989 [2021-06-05 22:13:02,814 INFO L226 Difference]: Without dead ends: 1929 [2021-06-05 22:13:02,814 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 405.2ms TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:13:02,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1929 states. [2021-06-05 22:13:02,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1929 to 1716. [2021-06-05 22:13:02,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1716 states, 1715 states have (on average 3.4903790087463555) internal successors, (5986), 1715 states have internal predecessors, (5986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:02,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1716 states to 1716 states and 5986 transitions. [2021-06-05 22:13:02,831 INFO L78 Accepts]: Start accepts. Automaton has 1716 states and 5986 transitions. Word has length 24 [2021-06-05 22:13:02,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:02,831 INFO L482 AbstractCegarLoop]: Abstraction has 1716 states and 5986 transitions. [2021-06-05 22:13:02,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:02,831 INFO L276 IsEmpty]: Start isEmpty. Operand 1716 states and 5986 transitions. [2021-06-05 22:13:02,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:13:02,833 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:02,833 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:03,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6710,304 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:03,033 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:03,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:03,033 INFO L82 PathProgramCache]: Analyzing trace with hash 952116244, now seen corresponding path program 303 times [2021-06-05 22:13:03,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:03,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189853209] [2021-06-05 22:13:03,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:03,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:03,167 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:13:03,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:03,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189853209] [2021-06-05 22:13:03,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189853209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:03,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792163552] [2021-06-05 22:13:03,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:03,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:13:03,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:13:03,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:13:03,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:03,510 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:13:03,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792163552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:03,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:03,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 22:13:03,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981903469] [2021-06-05 22:13:03,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:13:03,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:03,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:13:03,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:13:03,510 INFO L87 Difference]: Start difference. First operand 1716 states and 5986 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:05,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:05,072 INFO L93 Difference]: Finished difference Result 2227 states and 7324 transitions. [2021-06-05 22:13:05,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:13:05,072 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:13:05,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:05,075 INFO L225 Difference]: With dead ends: 2227 [2021-06-05 22:13:05,075 INFO L226 Difference]: Without dead ends: 2115 [2021-06-05 22:13:05,076 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1200.2ms TimeCoverageRelationStatistics Valid=266, Invalid=1896, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 22:13:05,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2115 states. [2021-06-05 22:13:05,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2115 to 1673. [2021-06-05 22:13:05,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1673 states, 1672 states have (on average 3.4671052631578947) internal successors, (5797), 1672 states have internal predecessors, (5797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:05,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1673 states to 1673 states and 5797 transitions. [2021-06-05 22:13:05,094 INFO L78 Accepts]: Start accepts. Automaton has 1673 states and 5797 transitions. Word has length 24 [2021-06-05 22:13:05,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:05,095 INFO L482 AbstractCegarLoop]: Abstraction has 1673 states and 5797 transitions. [2021-06-05 22:13:05,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:05,095 INFO L276 IsEmpty]: Start isEmpty. Operand 1673 states and 5797 transitions. [2021-06-05 22:13:05,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:13:05,096 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:05,097 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:05,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6726 [2021-06-05 22:13:05,297 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:05,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:05,297 INFO L82 PathProgramCache]: Analyzing trace with hash -591340454, now seen corresponding path program 304 times [2021-06-05 22:13:05,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:05,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928936494] [2021-06-05 22:13:05,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:05,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:05,436 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:13:05,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:05,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928936494] [2021-06-05 22:13:05,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928936494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:05,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255562181] [2021-06-05 22:13:05,436 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:05,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:13:05,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:13:05,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:13:05,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:05,776 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:13:05,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255562181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:05,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:05,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 22:13:05,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802349788] [2021-06-05 22:13:05,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:13:05,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:05,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:13:05,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:13:05,777 INFO L87 Difference]: Start difference. First operand 1673 states and 5797 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:07,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:07,936 INFO L93 Difference]: Finished difference Result 2322 states and 7662 transitions. [2021-06-05 22:13:07,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 22:13:07,936 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:13:07,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:07,940 INFO L225 Difference]: With dead ends: 2322 [2021-06-05 22:13:07,940 INFO L226 Difference]: Without dead ends: 2172 [2021-06-05 22:13:07,940 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 921 ImplicationChecksByTransitivity, 1767.1ms TimeCoverageRelationStatistics Valid=411, Invalid=3011, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 22:13:07,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-06-05 22:13:07,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 1686. [2021-06-05 22:13:07,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1686 states, 1685 states have (on average 3.4949554896142434) internal successors, (5889), 1685 states have internal predecessors, (5889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:07,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 5889 transitions. [2021-06-05 22:13:07,964 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 5889 transitions. Word has length 24 [2021-06-05 22:13:07,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:07,964 INFO L482 AbstractCegarLoop]: Abstraction has 1686 states and 5889 transitions. [2021-06-05 22:13:07,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:07,964 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 5889 transitions. [2021-06-05 22:13:07,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:13:07,966 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:07,966 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:08,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6751 [2021-06-05 22:13:08,166 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:08,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:08,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1349954870, now seen corresponding path program 305 times [2021-06-05 22:13:08,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:08,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716424594] [2021-06-05 22:13:08,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:08,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:08,397 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:13:08,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:08,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716424594] [2021-06-05 22:13:08,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716424594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:08,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4348370] [2021-06-05 22:13:08,397 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:08,541 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:13:08,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:13:08,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:13:08,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:08,783 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:08,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4348370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:08,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:08,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 22:13:08,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336753054] [2021-06-05 22:13:08,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:13:08,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:08,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:13:08,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:13:08,784 INFO L87 Difference]: Start difference. First operand 1686 states and 5889 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:10,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:10,661 INFO L93 Difference]: Finished difference Result 2053 states and 6839 transitions. [2021-06-05 22:13:10,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 22:13:10,662 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:13:10,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:10,664 INFO L225 Difference]: With dead ends: 2053 [2021-06-05 22:13:10,664 INFO L226 Difference]: Without dead ends: 1920 [2021-06-05 22:13:10,665 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 1550.9ms TimeCoverageRelationStatistics Valid=399, Invalid=2793, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 22:13:10,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1920 states. [2021-06-05 22:13:10,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1920 to 1672. [2021-06-05 22:13:10,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1672 states, 1671 states have (on average 3.485338120885697) internal successors, (5824), 1671 states have internal predecessors, (5824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:10,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 5824 transitions. [2021-06-05 22:13:10,682 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 5824 transitions. Word has length 24 [2021-06-05 22:13:10,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:10,682 INFO L482 AbstractCegarLoop]: Abstraction has 1672 states and 5824 transitions. [2021-06-05 22:13:10,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:10,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 5824 transitions. [2021-06-05 22:13:10,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:13:10,684 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:10,684 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:10,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6769 [2021-06-05 22:13:10,884 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:10,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:10,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1601280286, now seen corresponding path program 306 times [2021-06-05 22:13:10,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:10,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524810000] [2021-06-05 22:13:10,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:10,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:10,980 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:13:10,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:10,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524810000] [2021-06-05 22:13:10,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524810000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:10,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623774908] [2021-06-05 22:13:10,980 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:11,092 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:13:11,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:13:11,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:13:11,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:11,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 22:13:11,145 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:11,222 INFO L628 ElimStorePlain]: treesize reduction 63, result has 61.3 percent of original size [2021-06-05 22:13:11,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 22:13:11,225 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:11,281 INFO L628 ElimStorePlain]: treesize reduction 21, result has 77.7 percent of original size [2021-06-05 22:13:11,281 INFO L518 ElimStorePlain]: Eliminatee v_prenex_257 vanished before elimination [2021-06-05 22:13:11,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 22:13:11,284 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:11,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 22:13:11,287 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:11,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:11,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:13:11,311 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:168, output treesize:62 [2021-06-05 22:13:11,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:13:11,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:11,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:13:11,440 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:11,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:11,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:13:11,457 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:11,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:11,472 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:13:11,472 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:42, output treesize:16 [2021-06-05 22:13:11,497 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:11,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623774908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:11,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:11,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 22:13:11,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031803981] [2021-06-05 22:13:11,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:13:11,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:11,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:13:11,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:13:11,497 INFO L87 Difference]: Start difference. First operand 1672 states and 5824 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:12,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:12,095 INFO L93 Difference]: Finished difference Result 1974 states and 6688 transitions. [2021-06-05 22:13:12,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:13:12,095 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:13:12,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:12,098 INFO L225 Difference]: With dead ends: 1974 [2021-06-05 22:13:12,098 INFO L226 Difference]: Without dead ends: 1899 [2021-06-05 22:13:12,098 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 539.9ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:13:12,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899 states. [2021-06-05 22:13:12,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899 to 1672. [2021-06-05 22:13:12,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1672 states, 1671 states have (on average 3.473967684021544) internal successors, (5805), 1671 states have internal predecessors, (5805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:12,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 5805 transitions. [2021-06-05 22:13:12,117 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 5805 transitions. Word has length 24 [2021-06-05 22:13:12,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:12,117 INFO L482 AbstractCegarLoop]: Abstraction has 1672 states and 5805 transitions. [2021-06-05 22:13:12,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:12,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 5805 transitions. [2021-06-05 22:13:12,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:13:12,119 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:12,119 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:12,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6785 [2021-06-05 22:13:12,319 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:12,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:12,320 INFO L82 PathProgramCache]: Analyzing trace with hash -308120276, now seen corresponding path program 307 times [2021-06-05 22:13:12,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:12,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591665762] [2021-06-05 22:13:12,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:12,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:12,410 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:13:12,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:12,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591665762] [2021-06-05 22:13:12,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591665762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:12,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411052341] [2021-06-05 22:13:12,410 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:12,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:12,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:13:12,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:12,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 22:13:12,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:12,654 INFO L628 ElimStorePlain]: treesize reduction 6, result has 94.3 percent of original size [2021-06-05 22:13:12,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 22:13:12,657 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:12,711 INFO L628 ElimStorePlain]: treesize reduction 21, result has 77.7 percent of original size [2021-06-05 22:13:12,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 22:13:12,714 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:12,739 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:12,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 22:13:12,742 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:12,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:12,767 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:13:12,767 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:111, output treesize:62 [2021-06-05 22:13:12,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:13:12,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:12,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:13:12,884 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:12,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:12,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:13:12,901 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:12,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:12,916 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:13:12,916 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:42, output treesize:16 [2021-06-05 22:13:12,941 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:12,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411052341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:12,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:12,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 22:13:12,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934008569] [2021-06-05 22:13:12,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:13:12,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:12,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:13:12,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:13:12,941 INFO L87 Difference]: Start difference. First operand 1672 states and 5805 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:13,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:13,741 INFO L93 Difference]: Finished difference Result 1887 states and 6401 transitions. [2021-06-05 22:13:13,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:13:13,741 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:13:13,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:13,744 INFO L225 Difference]: With dead ends: 1887 [2021-06-05 22:13:13,744 INFO L226 Difference]: Without dead ends: 1794 [2021-06-05 22:13:13,744 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 672.9ms TimeCoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:13:13,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1794 states. [2021-06-05 22:13:13,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1794 to 1670. [2021-06-05 22:13:13,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1670 states, 1669 states have (on average 3.4661473936488916) internal successors, (5785), 1669 states have internal predecessors, (5785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:13,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1670 states to 1670 states and 5785 transitions. [2021-06-05 22:13:13,762 INFO L78 Accepts]: Start accepts. Automaton has 1670 states and 5785 transitions. Word has length 24 [2021-06-05 22:13:13,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:13,762 INFO L482 AbstractCegarLoop]: Abstraction has 1670 states and 5785 transitions. [2021-06-05 22:13:13,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:13,762 INFO L276 IsEmpty]: Start isEmpty. Operand 1670 states and 5785 transitions. [2021-06-05 22:13:13,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:13:13,764 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:13,764 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:13,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6799,309 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:13,965 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:13,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:13,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1902468142, now seen corresponding path program 308 times [2021-06-05 22:13:13,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:13,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797691629] [2021-06-05 22:13:13,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:13,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:14,100 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:13:14,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:14,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797691629] [2021-06-05 22:13:14,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797691629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:14,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629170124] [2021-06-05 22:13:14,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:14,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:13:14,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:13:14,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 22:13:14,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:14,417 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:14,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629170124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:14,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:14,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-06-05 22:13:14,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034938135] [2021-06-05 22:13:14,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:13:14,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:14,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:13:14,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:13:14,418 INFO L87 Difference]: Start difference. First operand 1670 states and 5785 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:16,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:16,202 INFO L93 Difference]: Finished difference Result 2329 states and 7648 transitions. [2021-06-05 22:13:16,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 22:13:16,202 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:13:16,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:16,205 INFO L225 Difference]: With dead ends: 2329 [2021-06-05 22:13:16,205 INFO L226 Difference]: Without dead ends: 2138 [2021-06-05 22:13:16,206 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 1400.9ms TimeCoverageRelationStatistics Valid=309, Invalid=2447, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 22:13:16,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2138 states. [2021-06-05 22:13:16,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2138 to 1693. [2021-06-05 22:13:16,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1693 states, 1692 states have (on average 3.4680851063829787) internal successors, (5868), 1692 states have internal predecessors, (5868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:16,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1693 states to 1693 states and 5868 transitions. [2021-06-05 22:13:16,225 INFO L78 Accepts]: Start accepts. Automaton has 1693 states and 5868 transitions. Word has length 24 [2021-06-05 22:13:16,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:16,225 INFO L482 AbstractCegarLoop]: Abstraction has 1693 states and 5868 transitions. [2021-06-05 22:13:16,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:16,226 INFO L276 IsEmpty]: Start isEmpty. Operand 1693 states and 5868 transitions. [2021-06-05 22:13:16,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:13:16,227 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:16,227 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:16,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6816 [2021-06-05 22:13:16,428 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:16,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:16,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1695049814, now seen corresponding path program 309 times [2021-06-05 22:13:16,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:16,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271295239] [2021-06-05 22:13:16,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:16,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:16,588 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:13:16,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:16,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271295239] [2021-06-05 22:13:16,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271295239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:16,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792438735] [2021-06-05 22:13:16,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:16,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:13:16,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:13:16,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 22:13:16,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:16,917 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:16,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792438735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:16,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:16,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-06-05 22:13:16,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920111637] [2021-06-05 22:13:16,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:13:16,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:16,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:13:16,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:13:16,918 INFO L87 Difference]: Start difference. First operand 1693 states and 5868 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:19,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:19,714 INFO L93 Difference]: Finished difference Result 2838 states and 9112 transitions. [2021-06-05 22:13:19,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 22:13:19,715 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:13:19,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:19,718 INFO L225 Difference]: With dead ends: 2838 [2021-06-05 22:13:19,719 INFO L226 Difference]: Without dead ends: 2628 [2021-06-05 22:13:19,719 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 2349.5ms TimeCoverageRelationStatistics Valid=471, Invalid=3435, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 22:13:19,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2628 states. [2021-06-05 22:13:19,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2628 to 1719. [2021-06-05 22:13:19,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 3.470896391152503) internal successors, (5963), 1718 states have internal predecessors, (5963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:19,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 5963 transitions. [2021-06-05 22:13:19,742 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 5963 transitions. Word has length 24 [2021-06-05 22:13:19,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:19,742 INFO L482 AbstractCegarLoop]: Abstraction has 1719 states and 5963 transitions. [2021-06-05 22:13:19,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:19,742 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 5963 transitions. [2021-06-05 22:13:19,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:13:19,745 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:19,745 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:19,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6822,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:19,952 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:19,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:19,952 INFO L82 PathProgramCache]: Analyzing trace with hash 887134254, now seen corresponding path program 310 times [2021-06-05 22:13:19,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:19,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208477168] [2021-06-05 22:13:19,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:19,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:20,090 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:13:20,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:20,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208477168] [2021-06-05 22:13:20,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208477168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:20,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495626492] [2021-06-05 22:13:20,090 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:20,203 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:13:20,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:13:20,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 22:13:20,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:20,411 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:20,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495626492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:20,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:20,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-06-05 22:13:20,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749060020] [2021-06-05 22:13:20,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:13:20,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:20,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:13:20,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:13:20,412 INFO L87 Difference]: Start difference. First operand 1719 states and 5963 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:22,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:22,138 INFO L93 Difference]: Finished difference Result 2452 states and 8102 transitions. [2021-06-05 22:13:22,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 22:13:22,139 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:13:22,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:22,142 INFO L225 Difference]: With dead ends: 2452 [2021-06-05 22:13:22,142 INFO L226 Difference]: Without dead ends: 2337 [2021-06-05 22:13:22,142 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 1368.7ms TimeCoverageRelationStatistics Valid=336, Invalid=2420, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 22:13:22,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2337 states. [2021-06-05 22:13:22,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2337 to 1751. [2021-06-05 22:13:22,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1751 states, 1750 states have (on average 3.4977142857142858) internal successors, (6121), 1750 states have internal predecessors, (6121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:22,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1751 states to 1751 states and 6121 transitions. [2021-06-05 22:13:22,164 INFO L78 Accepts]: Start accepts. Automaton has 1751 states and 6121 transitions. Word has length 24 [2021-06-05 22:13:22,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:22,164 INFO L482 AbstractCegarLoop]: Abstraction has 1751 states and 6121 transitions. [2021-06-05 22:13:22,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:22,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1751 states and 6121 transitions. [2021-06-05 22:13:22,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:13:22,167 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:22,167 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:22,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6830,312 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:22,367 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:22,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:22,367 INFO L82 PathProgramCache]: Analyzing trace with hash -660978942, now seen corresponding path program 311 times [2021-06-05 22:13:22,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:22,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378826769] [2021-06-05 22:13:22,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:22,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:22,523 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:22,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:22,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378826769] [2021-06-05 22:13:22,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378826769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:22,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369584570] [2021-06-05 22:13:22,524 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:22,637 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:13:22,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:13:22,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 22:13:22,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:22,854 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:13:22,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369584570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:22,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:22,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-06-05 22:13:22,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707403629] [2021-06-05 22:13:22,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:13:22,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:22,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:13:22,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:13:22,855 INFO L87 Difference]: Start difference. First operand 1751 states and 6121 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:25,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:25,129 INFO L93 Difference]: Finished difference Result 2641 states and 8576 transitions. [2021-06-05 22:13:25,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 22:13:25,129 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:13:25,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:25,132 INFO L225 Difference]: With dead ends: 2641 [2021-06-05 22:13:25,132 INFO L226 Difference]: Without dead ends: 2503 [2021-06-05 22:13:25,132 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 1767.3ms TimeCoverageRelationStatistics Valid=406, Invalid=3134, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 22:13:25,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2503 states. [2021-06-05 22:13:25,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2503 to 1670. [2021-06-05 22:13:25,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1670 states, 1669 states have (on average 3.4661473936488916) internal successors, (5785), 1669 states have internal predecessors, (5785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:25,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1670 states to 1670 states and 5785 transitions. [2021-06-05 22:13:25,153 INFO L78 Accepts]: Start accepts. Automaton has 1670 states and 5785 transitions. Word has length 24 [2021-06-05 22:13:25,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:25,153 INFO L482 AbstractCegarLoop]: Abstraction has 1670 states and 5785 transitions. [2021-06-05 22:13:25,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:25,153 INFO L276 IsEmpty]: Start isEmpty. Operand 1670 states and 5785 transitions. [2021-06-05 22:13:25,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:13:25,155 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:25,155 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:25,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6838,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:25,355 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:25,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:25,355 INFO L82 PathProgramCache]: Analyzing trace with hash 848323318, now seen corresponding path program 312 times [2021-06-05 22:13:25,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:25,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846125870] [2021-06-05 22:13:25,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:25,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:25,480 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:13:25,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:25,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846125870] [2021-06-05 22:13:25,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846125870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:25,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724108319] [2021-06-05 22:13:25,480 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:25,593 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:13:25,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:13:25,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 22:13:25,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:25,788 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:25,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724108319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:25,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:25,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 22:13:25,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282226238] [2021-06-05 22:13:25,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:13:25,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:25,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:13:25,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:13:25,788 INFO L87 Difference]: Start difference. First operand 1670 states and 5785 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:27,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:27,919 INFO L93 Difference]: Finished difference Result 2977 states and 9542 transitions. [2021-06-05 22:13:27,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 22:13:27,920 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:13:27,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:27,924 INFO L225 Difference]: With dead ends: 2977 [2021-06-05 22:13:27,924 INFO L226 Difference]: Without dead ends: 2740 [2021-06-05 22:13:27,924 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 1707.8ms TimeCoverageRelationStatistics Valid=367, Invalid=2939, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 22:13:27,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2740 states. [2021-06-05 22:13:27,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2740 to 1677. [2021-06-05 22:13:27,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1677 states, 1676 states have (on average 3.4665871121718377) internal successors, (5810), 1676 states have internal predecessors, (5810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:27,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1677 states to 1677 states and 5810 transitions. [2021-06-05 22:13:27,949 INFO L78 Accepts]: Start accepts. Automaton has 1677 states and 5810 transitions. Word has length 24 [2021-06-05 22:13:27,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:27,950 INFO L482 AbstractCegarLoop]: Abstraction has 1677 states and 5810 transitions. [2021-06-05 22:13:27,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:27,950 INFO L276 IsEmpty]: Start isEmpty. Operand 1677 states and 5810 transitions. [2021-06-05 22:13:27,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:13:27,951 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:27,952 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:28,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6846 [2021-06-05 22:13:28,152 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:28,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:28,152 INFO L82 PathProgramCache]: Analyzing trace with hash -864459910, now seen corresponding path program 313 times [2021-06-05 22:13:28,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:28,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520810037] [2021-06-05 22:13:28,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:28,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:28,259 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:13:28,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:28,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520810037] [2021-06-05 22:13:28,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520810037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:28,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032884189] [2021-06-05 22:13:28,259 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:28,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:28,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 22:13:28,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:28,563 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:13:28,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032884189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:28,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:28,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 22:13:28,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194624129] [2021-06-05 22:13:28,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:13:28,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:28,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:13:28,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:13:28,564 INFO L87 Difference]: Start difference. First operand 1677 states and 5810 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:30,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:30,077 INFO L93 Difference]: Finished difference Result 2771 states and 9108 transitions. [2021-06-05 22:13:30,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 22:13:30,077 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:13:30,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:30,081 INFO L225 Difference]: With dead ends: 2771 [2021-06-05 22:13:30,081 INFO L226 Difference]: Without dead ends: 2606 [2021-06-05 22:13:30,081 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 990.6ms TimeCoverageRelationStatistics Valid=305, Invalid=2347, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 22:13:30,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2606 states. [2021-06-05 22:13:30,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2606 to 1683. [2021-06-05 22:13:30,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1683 states, 1682 states have (on average 3.4863258026159336) internal successors, (5864), 1682 states have internal predecessors, (5864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:30,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1683 states to 1683 states and 5864 transitions. [2021-06-05 22:13:30,106 INFO L78 Accepts]: Start accepts. Automaton has 1683 states and 5864 transitions. Word has length 24 [2021-06-05 22:13:30,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:30,107 INFO L482 AbstractCegarLoop]: Abstraction has 1683 states and 5864 transitions. [2021-06-05 22:13:30,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:30,107 INFO L276 IsEmpty]: Start isEmpty. Operand 1683 states and 5864 transitions. [2021-06-05 22:13:30,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:13:30,108 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:30,108 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:30,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6854,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:30,309 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:30,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:30,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1186831674, now seen corresponding path program 314 times [2021-06-05 22:13:30,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:30,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215948281] [2021-06-05 22:13:30,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:30,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:30,391 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:13:30,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:30,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215948281] [2021-06-05 22:13:30,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215948281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:30,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388988025] [2021-06-05 22:13:30,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:30,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:13:30,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:13:30,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:13:30,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:30,765 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:13:30,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388988025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:30,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:30,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:13:30,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455899507] [2021-06-05 22:13:30,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:13:30,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:30,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:13:30,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:13:30,766 INFO L87 Difference]: Start difference. First operand 1683 states and 5864 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:30,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:30,977 INFO L93 Difference]: Finished difference Result 1907 states and 6473 transitions. [2021-06-05 22:13:30,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:13:30,977 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:13:30,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:30,980 INFO L225 Difference]: With dead ends: 1907 [2021-06-05 22:13:30,980 INFO L226 Difference]: Without dead ends: 1832 [2021-06-05 22:13:30,980 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 312.1ms TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:13:30,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2021-06-05 22:13:30,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 1627. [2021-06-05 22:13:30,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1627 states, 1626 states have (on average 3.458179581795818) internal successors, (5623), 1626 states have internal predecessors, (5623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:30,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1627 states to 1627 states and 5623 transitions. [2021-06-05 22:13:30,999 INFO L78 Accepts]: Start accepts. Automaton has 1627 states and 5623 transitions. Word has length 24 [2021-06-05 22:13:30,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:30,999 INFO L482 AbstractCegarLoop]: Abstraction has 1627 states and 5623 transitions. [2021-06-05 22:13:30,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:30,999 INFO L276 IsEmpty]: Start isEmpty. Operand 1627 states and 5623 transitions. [2021-06-05 22:13:31,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:13:31,001 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:31,001 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:31,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 316 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6862 [2021-06-05 22:13:31,202 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:31,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:31,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1721159154, now seen corresponding path program 315 times [2021-06-05 22:13:31,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:31,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742290480] [2021-06-05 22:13:31,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:31,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:31,339 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:13:31,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:31,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742290480] [2021-06-05 22:13:31,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742290480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:31,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077137829] [2021-06-05 22:13:31,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:31,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:13:31,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:13:31,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:13:31,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:31,667 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:13:31,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077137829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:31,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:31,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-05 22:13:31,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420751556] [2021-06-05 22:13:31,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:13:31,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:31,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:13:31,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:13:31,668 INFO L87 Difference]: Start difference. First operand 1627 states and 5623 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:34,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:34,469 INFO L93 Difference]: Finished difference Result 2439 states and 7890 transitions. [2021-06-05 22:13:34,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 22:13:34,470 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:13:34,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:34,473 INFO L225 Difference]: With dead ends: 2439 [2021-06-05 22:13:34,473 INFO L226 Difference]: Without dead ends: 2225 [2021-06-05 22:13:34,473 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 2403.0ms TimeCoverageRelationStatistics Valid=715, Invalid=4115, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 22:13:34,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2021-06-05 22:13:34,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 1621. [2021-06-05 22:13:34,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1620 states have (on average 3.45) internal successors, (5589), 1620 states have internal predecessors, (5589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:34,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 5589 transitions. [2021-06-05 22:13:34,494 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 5589 transitions. Word has length 24 [2021-06-05 22:13:34,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:34,494 INFO L482 AbstractCegarLoop]: Abstraction has 1621 states and 5589 transitions. [2021-06-05 22:13:34,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:34,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 5589 transitions. [2021-06-05 22:13:34,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:13:34,495 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:34,496 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:34,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6887,317 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:34,696 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:34,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:34,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1073438964, now seen corresponding path program 316 times [2021-06-05 22:13:34,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:34,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961531259] [2021-06-05 22:13:34,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:34,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:34,785 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:13:34,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:34,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961531259] [2021-06-05 22:13:34,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961531259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:34,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756553589] [2021-06-05 22:13:34,785 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:34,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:13:34,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:13:34,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:13:34,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:34,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:13:34,929 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:34,951 INFO L628 ElimStorePlain]: treesize reduction 17, result has 54.1 percent of original size [2021-06-05 22:13:34,951 INFO L518 ElimStorePlain]: Eliminatee v_prenex_261 vanished before elimination [2021-06-05 22:13:34,951 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:13:34,951 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:20 [2021-06-05 22:13:34,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:13:34,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:35,000 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:35,001 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:35,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:13:35,004 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:35,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:35,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:13:35,025 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:35,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:13:35,027 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:35,053 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-05 22:13:35,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:13:35,054 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-05 22:13:35,099 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:13:35,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756553589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:35,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:35,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 15 [2021-06-05 22:13:35,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276692782] [2021-06-05 22:13:35,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:13:35,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:35,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:13:35,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:13:35,100 INFO L87 Difference]: Start difference. First operand 1621 states and 5589 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:35,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:35,726 INFO L93 Difference]: Finished difference Result 1957 states and 6615 transitions. [2021-06-05 22:13:35,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:13:35,726 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:13:35,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:35,729 INFO L225 Difference]: With dead ends: 1957 [2021-06-05 22:13:35,729 INFO L226 Difference]: Without dead ends: 1888 [2021-06-05 22:13:35,729 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 393.4ms TimeCoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:13:35,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1888 states. [2021-06-05 22:13:35,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1888 to 1651. [2021-06-05 22:13:35,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 3.4593939393939395) internal successors, (5708), 1650 states have internal predecessors, (5708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:35,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 5708 transitions. [2021-06-05 22:13:35,748 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 5708 transitions. Word has length 24 [2021-06-05 22:13:35,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:35,748 INFO L482 AbstractCegarLoop]: Abstraction has 1651 states and 5708 transitions. [2021-06-05 22:13:35,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:35,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 5708 transitions. [2021-06-05 22:13:35,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:13:35,750 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:35,750 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:35,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6899,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:35,950 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:35,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:35,950 INFO L82 PathProgramCache]: Analyzing trace with hash -2046037688, now seen corresponding path program 317 times [2021-06-05 22:13:35,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:35,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709753886] [2021-06-05 22:13:35,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:35,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:36,039 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:13:36,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:36,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709753886] [2021-06-05 22:13:36,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709753886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:36,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957044586] [2021-06-05 22:13:36,040 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:36,154 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:13:36,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:13:36,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:13:36,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:36,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:13:36,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,205 INFO L628 ElimStorePlain]: treesize reduction 17, result has 54.1 percent of original size [2021-06-05 22:13:36,205 INFO L518 ElimStorePlain]: Eliminatee v_prenex_262 vanished before elimination [2021-06-05 22:13:36,206 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:13:36,206 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:20 [2021-06-05 22:13:36,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:13:36,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:13:36,339 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:13:36,343 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:13:36,347 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,349 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,350 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,352 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:36,353 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,430 INFO L628 ElimStorePlain]: treesize reduction 43, result has 67.4 percent of original size [2021-06-05 22:13:36,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:13:36,433 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:13:36,437 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:13:36,440 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:13:36,443 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,500 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.3 percent of original size [2021-06-05 22:13:36,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:13:36,504 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:36,542 INFO L628 ElimStorePlain]: treesize reduction 19, result has 72.5 percent of original size [2021-06-05 22:13:36,542 INFO L518 ElimStorePlain]: Eliminatee v_prenex_263 vanished before elimination [2021-06-05 22:13:36,543 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:13:36,543 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:201, output treesize:34 [2021-06-05 22:13:36,616 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:13:36,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957044586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:36,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:36,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 22:13:36,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776363990] [2021-06-05 22:13:36,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:13:36,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:36,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:13:36,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:13:36,617 INFO L87 Difference]: Start difference. First operand 1651 states and 5708 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:37,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:37,160 INFO L93 Difference]: Finished difference Result 2130 states and 7161 transitions. [2021-06-05 22:13:37,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:13:37,160 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:13:37,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:37,163 INFO L225 Difference]: With dead ends: 2130 [2021-06-05 22:13:37,163 INFO L226 Difference]: Without dead ends: 2070 [2021-06-05 22:13:37,163 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 422.3ms TimeCoverageRelationStatistics Valid=172, Invalid=950, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:13:37,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2070 states. [2021-06-05 22:13:37,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2070 to 1684. [2021-06-05 22:13:37,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1684 states, 1683 states have (on average 3.4878193701723115) internal successors, (5870), 1683 states have internal predecessors, (5870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:37,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1684 states to 1684 states and 5870 transitions. [2021-06-05 22:13:37,182 INFO L78 Accepts]: Start accepts. Automaton has 1684 states and 5870 transitions. Word has length 24 [2021-06-05 22:13:37,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:37,182 INFO L482 AbstractCegarLoop]: Abstraction has 1684 states and 5870 transitions. [2021-06-05 22:13:37,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:37,182 INFO L276 IsEmpty]: Start isEmpty. Operand 1684 states and 5870 transitions. [2021-06-05 22:13:37,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:13:37,184 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:37,184 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:37,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6906 [2021-06-05 22:13:37,385 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:37,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:37,385 INFO L82 PathProgramCache]: Analyzing trace with hash -432470954, now seen corresponding path program 318 times [2021-06-05 22:13:37,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:37,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597501497] [2021-06-05 22:13:37,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:37,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:37,474 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:13:37,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:37,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597501497] [2021-06-05 22:13:37,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597501497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:37,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464730353] [2021-06-05 22:13:37,475 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:37,590 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:13:37,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:13:37,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:13:37,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:37,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:13:37,622 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:37,647 INFO L628 ElimStorePlain]: treesize reduction 2, result has 90.9 percent of original size [2021-06-05 22:13:37,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:13:37,648 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:20 [2021-06-05 22:13:37,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:13:37,765 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:37,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:13:37,769 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:37,771 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:37,772 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:37,774 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:37,774 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:37,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:13:37,778 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:37,829 INFO L628 ElimStorePlain]: treesize reduction 24, result has 72.1 percent of original size [2021-06-05 22:13:37,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:13:37,833 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:37,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:13:37,836 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:37,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:13:37,838 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:37,876 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.0 percent of original size [2021-06-05 22:13:37,876 INFO L518 ElimStorePlain]: Eliminatee ends_with_10 vanished before elimination [2021-06-05 22:13:37,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:13:37,904 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:146, output treesize:34 [2021-06-05 22:13:37,965 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:13:37,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464730353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:37,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:37,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 15 [2021-06-05 22:13:37,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649856289] [2021-06-05 22:13:37,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:13:37,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:37,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:13:37,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:13:37,966 INFO L87 Difference]: Start difference. First operand 1684 states and 5870 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:38,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:38,645 INFO L93 Difference]: Finished difference Result 2020 states and 6804 transitions. [2021-06-05 22:13:38,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:13:38,645 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:13:38,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:38,648 INFO L225 Difference]: With dead ends: 2020 [2021-06-05 22:13:38,648 INFO L226 Difference]: Without dead ends: 1953 [2021-06-05 22:13:38,648 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 504.6ms TimeCoverageRelationStatistics Valid=178, Invalid=1082, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:13:38,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1953 states. [2021-06-05 22:13:38,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1953 to 1623. [2021-06-05 22:13:38,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1623 states, 1622 states have (on average 3.4494451294697903) internal successors, (5595), 1622 states have internal predecessors, (5595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:38,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1623 states to 1623 states and 5595 transitions. [2021-06-05 22:13:38,665 INFO L78 Accepts]: Start accepts. Automaton has 1623 states and 5595 transitions. Word has length 24 [2021-06-05 22:13:38,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:38,666 INFO L482 AbstractCegarLoop]: Abstraction has 1623 states and 5595 transitions. [2021-06-05 22:13:38,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:38,666 INFO L276 IsEmpty]: Start isEmpty. Operand 1623 states and 5595 transitions. [2021-06-05 22:13:38,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:13:38,667 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:38,667 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:38,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6936,320 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:38,868 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:38,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:38,868 INFO L82 PathProgramCache]: Analyzing trace with hash 34433908, now seen corresponding path program 319 times [2021-06-05 22:13:38,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:38,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091061640] [2021-06-05 22:13:38,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:38,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:39,001 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:13:39,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:39,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091061640] [2021-06-05 22:13:39,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091061640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:39,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487073760] [2021-06-05 22:13:39,001 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:39,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:39,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:13:39,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:39,302 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:13:39,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487073760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:39,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:39,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-05 22:13:39,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364918653] [2021-06-05 22:13:39,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:13:39,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:39,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:13:39,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:13:39,302 INFO L87 Difference]: Start difference. First operand 1623 states and 5595 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:41,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:41,671 INFO L93 Difference]: Finished difference Result 2438 states and 7938 transitions. [2021-06-05 22:13:41,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 22:13:41,681 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:13:41,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:41,685 INFO L225 Difference]: With dead ends: 2438 [2021-06-05 22:13:41,685 INFO L226 Difference]: Without dead ends: 2254 [2021-06-05 22:13:41,685 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1612 ImplicationChecksByTransitivity, 1876.5ms TimeCoverageRelationStatistics Valid=574, Invalid=4682, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 22:13:41,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2254 states. [2021-06-05 22:13:41,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2254 to 1641. [2021-06-05 22:13:41,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1641 states, 1640 states have (on average 3.479878048780488) internal successors, (5707), 1640 states have internal predecessors, (5707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:41,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1641 states to 1641 states and 5707 transitions. [2021-06-05 22:13:41,706 INFO L78 Accepts]: Start accepts. Automaton has 1641 states and 5707 transitions. Word has length 24 [2021-06-05 22:13:41,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:41,706 INFO L482 AbstractCegarLoop]: Abstraction has 1641 states and 5707 transitions. [2021-06-05 22:13:41,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:41,706 INFO L276 IsEmpty]: Start isEmpty. Operand 1641 states and 5707 transitions. [2021-06-05 22:13:41,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:13:41,708 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:41,708 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:41,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6965,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:41,909 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:41,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:41,910 INFO L82 PathProgramCache]: Analyzing trace with hash 104543944, now seen corresponding path program 320 times [2021-06-05 22:13:41,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:41,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318555216] [2021-06-05 22:13:41,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:41,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:42,054 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:13:42,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:42,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318555216] [2021-06-05 22:13:42,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318555216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:42,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946635958] [2021-06-05 22:13:42,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:42,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:13:42,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:13:42,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:13:42,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:42,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 22:13:42,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:42,270 INFO L628 ElimStorePlain]: treesize reduction 58, result has 55.7 percent of original size [2021-06-05 22:13:42,271 INFO L518 ElimStorePlain]: Eliminatee v_prenex_266 vanished before elimination [2021-06-05 22:13:42,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 22:13:42,274 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:42,299 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:42,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 22:13:42,302 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:42,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:42,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:13:42,327 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:137, output treesize:62 [2021-06-05 22:13:42,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:13:42,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:42,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:13:42,450 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:42,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:13:42,454 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:42,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:13:42,457 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:42,525 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.6 percent of original size [2021-06-05 22:13:42,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:13:42,529 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:42,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:13:42,531 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:42,582 INFO L628 ElimStorePlain]: treesize reduction 15, result has 79.7 percent of original size [2021-06-05 22:13:42,583 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:13:42,583 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:99, output treesize:43 [2021-06-05 22:13:42,668 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:13:42,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946635958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:42,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:42,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 18 [2021-06-05 22:13:42,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126923420] [2021-06-05 22:13:42,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:13:42,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:42,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:13:42,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:13:42,669 INFO L87 Difference]: Start difference. First operand 1641 states and 5707 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:44,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:44,775 INFO L93 Difference]: Finished difference Result 2328 states and 7668 transitions. [2021-06-05 22:13:44,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 22:13:44,775 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:13:44,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:44,778 INFO L225 Difference]: With dead ends: 2328 [2021-06-05 22:13:44,779 INFO L226 Difference]: Without dead ends: 2208 [2021-06-05 22:13:44,779 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 1652.1ms TimeCoverageRelationStatistics Valid=507, Invalid=3275, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 22:13:44,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2208 states. [2021-06-05 22:13:44,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2208 to 1656. [2021-06-05 22:13:44,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1655 states have (on average 3.4924471299093653) internal successors, (5780), 1655 states have internal predecessors, (5780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:44,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 5780 transitions. [2021-06-05 22:13:44,799 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 5780 transitions. Word has length 24 [2021-06-05 22:13:44,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:44,800 INFO L482 AbstractCegarLoop]: Abstraction has 1656 states and 5780 transitions. [2021-06-05 22:13:44,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:44,800 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 5780 transitions. [2021-06-05 22:13:44,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:13:44,801 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:44,801 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:45,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6974,322 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:45,002 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:45,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:45,002 INFO L82 PathProgramCache]: Analyzing trace with hash 353509398, now seen corresponding path program 321 times [2021-06-05 22:13:45,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:45,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929577156] [2021-06-05 22:13:45,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:45,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:45,195 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:13:45,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:45,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929577156] [2021-06-05 22:13:45,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929577156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:45,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390536924] [2021-06-05 22:13:45,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:45,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:13:45,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:13:45,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:13:45,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:45,533 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:13:45,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390536924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:45,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:45,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-05 22:13:45,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683894396] [2021-06-05 22:13:45,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:13:45,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:45,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:13:45,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:13:45,534 INFO L87 Difference]: Start difference. First operand 1656 states and 5780 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:47,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:47,499 INFO L93 Difference]: Finished difference Result 2232 states and 7426 transitions. [2021-06-05 22:13:47,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 22:13:47,500 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:13:47,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:47,503 INFO L225 Difference]: With dead ends: 2232 [2021-06-05 22:13:47,503 INFO L226 Difference]: Without dead ends: 2058 [2021-06-05 22:13:47,503 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1064 ImplicationChecksByTransitivity, 1604.1ms TimeCoverageRelationStatistics Valid=372, Invalid=3410, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 22:13:47,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2058 states. [2021-06-05 22:13:47,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2058 to 1654. [2021-06-05 22:13:47,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1654 states, 1653 states have (on average 3.4827586206896552) internal successors, (5757), 1653 states have internal predecessors, (5757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:47,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 5757 transitions. [2021-06-05 22:13:47,521 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 5757 transitions. Word has length 24 [2021-06-05 22:13:47,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:47,521 INFO L482 AbstractCegarLoop]: Abstraction has 1654 states and 5757 transitions. [2021-06-05 22:13:47,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:47,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 5757 transitions. [2021-06-05 22:13:47,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:13:47,523 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:47,523 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:47,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6985,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:47,724 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:47,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:47,724 INFO L82 PathProgramCache]: Analyzing trace with hash 643781646, now seen corresponding path program 322 times [2021-06-05 22:13:47,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:47,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058147032] [2021-06-05 22:13:47,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:47,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:47,805 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:13:47,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:47,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058147032] [2021-06-05 22:13:47,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058147032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:47,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684723106] [2021-06-05 22:13:47,806 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:47,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:13:47,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:13:47,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:13:47,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:47,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:13:47,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:47,976 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:47,977 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:47,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:13:47,979 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:47,996 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:47,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:13:47,999 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:48,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:13:48,002 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:48,028 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-05 22:13:48,029 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:13:48,029 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-05 22:13:48,072 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:13:48,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684723106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:48,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:48,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 14 [2021-06-05 22:13:48,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366640074] [2021-06-05 22:13:48,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:13:48,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:48,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:13:48,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:13:48,073 INFO L87 Difference]: Start difference. First operand 1654 states and 5757 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:48,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:48,800 INFO L93 Difference]: Finished difference Result 1923 states and 6557 transitions. [2021-06-05 22:13:48,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:13:48,800 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:13:48,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:48,803 INFO L225 Difference]: With dead ends: 1923 [2021-06-05 22:13:48,803 INFO L226 Difference]: Without dead ends: 1845 [2021-06-05 22:13:48,804 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 560.9ms TimeCoverageRelationStatistics Valid=219, Invalid=1041, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:13:48,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1845 states. [2021-06-05 22:13:48,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1845 to 1635. [2021-06-05 22:13:48,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1635 states, 1634 states have (on average 3.4871481028151776) internal successors, (5698), 1634 states have internal predecessors, (5698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:48,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1635 states to 1635 states and 5698 transitions. [2021-06-05 22:13:48,821 INFO L78 Accepts]: Start accepts. Automaton has 1635 states and 5698 transitions. Word has length 24 [2021-06-05 22:13:48,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:48,821 INFO L482 AbstractCegarLoop]: Abstraction has 1635 states and 5698 transitions. [2021-06-05 22:13:48,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:48,822 INFO L276 IsEmpty]: Start isEmpty. Operand 1635 states and 5698 transitions. [2021-06-05 22:13:48,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:13:48,823 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:48,823 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:49,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6994 [2021-06-05 22:13:49,024 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:49,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:49,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1570714054, now seen corresponding path program 323 times [2021-06-05 22:13:49,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:49,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832963995] [2021-06-05 22:13:49,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:49,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:49,109 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:13:49,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:49,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832963995] [2021-06-05 22:13:49,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832963995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:49,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955410728] [2021-06-05 22:13:49,109 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:49,225 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:13:49,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:13:49,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:13:49,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:49,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:13:49,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:49,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:13:49,303 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:49,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:13:49,306 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:49,369 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-06-05 22:13:49,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:13:49,372 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:49,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:13:49,375 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:49,401 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-05 22:13:49,402 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:13:49,402 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-05 22:13:49,446 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:13:49,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955410728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:49,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:49,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 15 [2021-06-05 22:13:49,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322241580] [2021-06-05 22:13:49,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:13:49,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:49,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:13:49,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:13:49,447 INFO L87 Difference]: Start difference. First operand 1635 states and 5698 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:50,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:50,158 INFO L93 Difference]: Finished difference Result 2066 states and 7013 transitions. [2021-06-05 22:13:50,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:13:50,158 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:13:50,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:50,161 INFO L225 Difference]: With dead ends: 2066 [2021-06-05 22:13:50,161 INFO L226 Difference]: Without dead ends: 1997 [2021-06-05 22:13:50,161 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 506.6ms TimeCoverageRelationStatistics Valid=201, Invalid=1059, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:13:50,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1997 states. [2021-06-05 22:13:50,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1997 to 1662. [2021-06-05 22:13:50,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1662 states, 1661 states have (on average 3.4942805538832027) internal successors, (5804), 1661 states have internal predecessors, (5804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:50,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1662 states to 1662 states and 5804 transitions. [2021-06-05 22:13:50,180 INFO L78 Accepts]: Start accepts. Automaton has 1662 states and 5804 transitions. Word has length 24 [2021-06-05 22:13:50,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:50,180 INFO L482 AbstractCegarLoop]: Abstraction has 1662 states and 5804 transitions. [2021-06-05 22:13:50,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:50,180 INFO L276 IsEmpty]: Start isEmpty. Operand 1662 states and 5804 transitions. [2021-06-05 22:13:50,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:13:50,182 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:50,182 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:50,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7000,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:50,382 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:50,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:50,383 INFO L82 PathProgramCache]: Analyzing trace with hash -395223410, now seen corresponding path program 324 times [2021-06-05 22:13:50,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:50,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851303509] [2021-06-05 22:13:50,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:50,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:50,473 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:13:50,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:50,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851303509] [2021-06-05 22:13:50,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851303509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:50,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101802335] [2021-06-05 22:13:50,474 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:50,591 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:13:50,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:13:50,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:13:50,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:50,720 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:13:50,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101802335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:50,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:50,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 22:13:50,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331707306] [2021-06-05 22:13:50,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:13:50,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:50,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:13:50,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:13:50,721 INFO L87 Difference]: Start difference. First operand 1662 states and 5804 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:51,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:51,425 INFO L93 Difference]: Finished difference Result 2132 states and 7230 transitions. [2021-06-05 22:13:51,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:13:51,426 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:13:51,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:51,429 INFO L225 Difference]: With dead ends: 2132 [2021-06-05 22:13:51,429 INFO L226 Difference]: Without dead ends: 2072 [2021-06-05 22:13:51,429 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 492.5ms TimeCoverageRelationStatistics Valid=247, Invalid=1085, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:13:51,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2072 states. [2021-06-05 22:13:51,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2072 to 1695. [2021-06-05 22:13:51,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1695 states, 1694 states have (on average 3.52125147579693) internal successors, (5965), 1694 states have internal predecessors, (5965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:51,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1695 states to 1695 states and 5965 transitions. [2021-06-05 22:13:51,447 INFO L78 Accepts]: Start accepts. Automaton has 1695 states and 5965 transitions. Word has length 24 [2021-06-05 22:13:51,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:51,447 INFO L482 AbstractCegarLoop]: Abstraction has 1695 states and 5965 transitions. [2021-06-05 22:13:51,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:51,448 INFO L276 IsEmpty]: Start isEmpty. Operand 1695 states and 5965 transitions. [2021-06-05 22:13:51,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:13:51,449 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:51,449 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:51,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7007 [2021-06-05 22:13:51,650 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:51,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:51,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1218343324, now seen corresponding path program 325 times [2021-06-05 22:13:51,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:51,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332281294] [2021-06-05 22:13:51,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:51,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:51,734 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:13:51,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:51,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332281294] [2021-06-05 22:13:51,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332281294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:51,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720366002] [2021-06-05 22:13:51,735 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:51,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:51,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:13:51,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:51,962 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:13:51,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720366002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:51,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:51,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 22:13:51,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060408175] [2021-06-05 22:13:51,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:13:51,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:51,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:13:51,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:13:51,963 INFO L87 Difference]: Start difference. First operand 1695 states and 5965 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:52,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:52,640 INFO L93 Difference]: Finished difference Result 1988 states and 6783 transitions. [2021-06-05 22:13:52,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:13:52,641 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:13:52,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:52,644 INFO L225 Difference]: With dead ends: 1988 [2021-06-05 22:13:52,644 INFO L226 Difference]: Without dead ends: 1919 [2021-06-05 22:13:52,644 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 404.3ms TimeCoverageRelationStatistics Valid=169, Invalid=1021, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:13:52,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1919 states. [2021-06-05 22:13:52,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1919 to 1622. [2021-06-05 22:13:52,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 1621 states have (on average 3.4818013571869217) internal successors, (5644), 1621 states have internal predecessors, (5644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:52,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 5644 transitions. [2021-06-05 22:13:52,663 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 5644 transitions. Word has length 24 [2021-06-05 22:13:52,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:52,663 INFO L482 AbstractCegarLoop]: Abstraction has 1622 states and 5644 transitions. [2021-06-05 22:13:52,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:52,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 5644 transitions. [2021-06-05 22:13:52,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:13:52,665 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:52,665 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:52,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7016 [2021-06-05 22:13:52,865 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:52,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:52,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1500604018, now seen corresponding path program 326 times [2021-06-05 22:13:52,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:52,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116397925] [2021-06-05 22:13:52,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:52,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:52,953 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:13:52,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:52,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116397925] [2021-06-05 22:13:52,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116397925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:52,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426383170] [2021-06-05 22:13:52,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:53,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:13:53,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:13:53,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:13:53,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:53,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:13:53,106 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:53,125 INFO L628 ElimStorePlain]: treesize reduction 2, result has 90.9 percent of original size [2021-06-05 22:13:53,126 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:13:53,126 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:20 [2021-06-05 22:13:53,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:13:53,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:53,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:13:53,183 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:53,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:13:53,186 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:53,222 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-06-05 22:13:53,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:13:53,225 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:53,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:13:53,227 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:53,253 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-05 22:13:53,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:13:53,254 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-05 22:13:53,299 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:13:53,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426383170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:53,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:53,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 15 [2021-06-05 22:13:53,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637202987] [2021-06-05 22:13:53,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:13:53,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:53,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:13:53,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:13:53,300 INFO L87 Difference]: Start difference. First operand 1622 states and 5644 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:53,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:53,963 INFO L93 Difference]: Finished difference Result 1893 states and 6482 transitions. [2021-06-05 22:13:53,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:13:53,964 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:13:53,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:53,966 INFO L225 Difference]: With dead ends: 1893 [2021-06-05 22:13:53,966 INFO L226 Difference]: Without dead ends: 1824 [2021-06-05 22:13:53,966 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 469.9ms TimeCoverageRelationStatistics Valid=179, Invalid=1011, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:13:53,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1824 states. [2021-06-05 22:13:53,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1824 to 1651. [2021-06-05 22:13:53,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 3.4903030303030302) internal successors, (5759), 1650 states have internal predecessors, (5759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:53,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 5759 transitions. [2021-06-05 22:13:53,984 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 5759 transitions. Word has length 24 [2021-06-05 22:13:53,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:53,984 INFO L482 AbstractCegarLoop]: Abstraction has 1651 states and 5759 transitions. [2021-06-05 22:13:53,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:53,984 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 5759 transitions. [2021-06-05 22:13:53,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:13:53,986 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:53,986 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:54,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7025,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:54,187 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:54,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:54,187 INFO L82 PathProgramCache]: Analyzing trace with hash -325113374, now seen corresponding path program 327 times [2021-06-05 22:13:54,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:54,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596751057] [2021-06-05 22:13:54,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:54,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:54,281 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:13:54,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:54,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596751057] [2021-06-05 22:13:54,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596751057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:54,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173800638] [2021-06-05 22:13:54,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:54,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:13:54,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:13:54,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:13:54,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:54,433 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:54,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:54,455 INFO L628 ElimStorePlain]: treesize reduction 2, result has 92.3 percent of original size [2021-06-05 22:13:54,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:13:54,458 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:54,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:54,468 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:13:54,468 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:20 [2021-06-05 22:13:54,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:13:54,642 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:54,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:13:54,645 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:54,648 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:54,648 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:54,651 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:54,651 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:54,653 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:54,654 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:54,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:13:54,657 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:54,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:13:54,661 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:54,663 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:54,664 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:54,731 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.8 percent of original size [2021-06-05 22:13:54,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:13:54,734 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:54,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:13:54,738 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:54,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:13:54,741 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:54,795 INFO L628 ElimStorePlain]: treesize reduction 21, result has 70.4 percent of original size [2021-06-05 22:13:54,796 INFO L518 ElimStorePlain]: Eliminatee v_prenex_270 vanished before elimination [2021-06-05 22:13:54,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:13:54,797 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:201, output treesize:34 [2021-06-05 22:13:54,869 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:13:54,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173800638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:54,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:54,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 22:13:54,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596424999] [2021-06-05 22:13:54,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:13:54,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:54,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:13:54,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:13:54,870 INFO L87 Difference]: Start difference. First operand 1651 states and 5759 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:55,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:55,551 INFO L93 Difference]: Finished difference Result 2065 states and 7023 transitions. [2021-06-05 22:13:55,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:13:55,552 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:13:55,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:55,554 INFO L225 Difference]: With dead ends: 2065 [2021-06-05 22:13:55,555 INFO L226 Difference]: Without dead ends: 2005 [2021-06-05 22:13:55,555 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 517.9ms TimeCoverageRelationStatistics Valid=217, Invalid=1043, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:13:55,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2005 states. [2021-06-05 22:13:55,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2005 to 1683. [2021-06-05 22:13:55,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1683 states, 1682 states have (on average 3.5172413793103448) internal successors, (5916), 1682 states have internal predecessors, (5916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:55,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1683 states to 1683 states and 5916 transitions. [2021-06-05 22:13:55,574 INFO L78 Accepts]: Start accepts. Automaton has 1683 states and 5916 transitions. Word has length 24 [2021-06-05 22:13:55,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:55,574 INFO L482 AbstractCegarLoop]: Abstraction has 1683 states and 5916 transitions. [2021-06-05 22:13:55,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:55,574 INFO L276 IsEmpty]: Start isEmpty. Operand 1683 states and 5916 transitions. [2021-06-05 22:13:55,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:13:55,576 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:55,576 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:55,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7032 [2021-06-05 22:13:55,776 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:55,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:55,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1288453360, now seen corresponding path program 328 times [2021-06-05 22:13:55,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:55,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315458918] [2021-06-05 22:13:55,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:55,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:55,860 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:13:55,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:55,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315458918] [2021-06-05 22:13:55,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315458918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:55,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991277095] [2021-06-05 22:13:55,861 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:55,975 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:13:55,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:13:55,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:13:55,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:56,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:13:56,013 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:56,034 INFO L628 ElimStorePlain]: treesize reduction 17, result has 54.1 percent of original size [2021-06-05 22:13:56,034 INFO L518 ElimStorePlain]: Eliminatee v_prenex_271 vanished before elimination [2021-06-05 22:13:56,035 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:13:56,035 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:20 [2021-06-05 22:13:56,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:13:56,173 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:56,265 INFO L628 ElimStorePlain]: treesize reduction 95, result has 49.7 percent of original size [2021-06-05 22:13:56,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:13:56,269 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:56,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:13:56,272 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:56,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:13:56,276 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:56,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:13:56,279 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:56,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:56,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:13:56,315 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:56,373 INFO L628 ElimStorePlain]: treesize reduction 3, result has 96.1 percent of original size [2021-06-05 22:13:56,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:13:56,376 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:56,417 INFO L628 ElimStorePlain]: treesize reduction 16, result has 76.8 percent of original size [2021-06-05 22:13:56,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:13:56,420 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:56,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:56,439 INFO L518 ElimStorePlain]: Eliminatee v_prenex_273 vanished before elimination [2021-06-05 22:13:56,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 6 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:13:56,440 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:192, output treesize:34 [2021-06-05 22:13:56,510 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:13:56,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991277095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:56,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:56,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 22:13:56,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009093193] [2021-06-05 22:13:56,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:13:56,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:56,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:13:56,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:13:56,511 INFO L87 Difference]: Start difference. First operand 1683 states and 5916 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:57,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:57,312 INFO L93 Difference]: Finished difference Result 1987 states and 6778 transitions. [2021-06-05 22:13:57,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:13:57,312 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:13:57,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:57,315 INFO L225 Difference]: With dead ends: 1987 [2021-06-05 22:13:57,315 INFO L226 Difference]: Without dead ends: 1920 [2021-06-05 22:13:57,315 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 509.2ms TimeCoverageRelationStatistics Valid=180, Invalid=1152, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:13:57,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1920 states. [2021-06-05 22:13:57,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1920 to 1620. [2021-06-05 22:13:57,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1620 states, 1619 states have (on average 3.4793082149474985) internal successors, (5633), 1619 states have internal predecessors, (5633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:57,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1620 states to 1620 states and 5633 transitions. [2021-06-05 22:13:57,334 INFO L78 Accepts]: Start accepts. Automaton has 1620 states and 5633 transitions. Word has length 24 [2021-06-05 22:13:57,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:57,334 INFO L482 AbstractCegarLoop]: Abstraction has 1620 states and 5633 transitions. [2021-06-05 22:13:57,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:57,334 INFO L276 IsEmpty]: Start isEmpty. Operand 1620 states and 5633 transitions. [2021-06-05 22:13:57,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:13:57,336 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:57,336 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:57,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7098 [2021-06-05 22:13:57,537 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:57,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:57,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1849886158, now seen corresponding path program 329 times [2021-06-05 22:13:57,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:57,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788167371] [2021-06-05 22:13:57,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:57,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:57,619 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:13:57,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:57,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788167371] [2021-06-05 22:13:57,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788167371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:57,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157857478] [2021-06-05 22:13:57,619 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:57,735 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:13:57,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:13:57,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:13:57,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:57,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:13:57,785 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:57,842 INFO L628 ElimStorePlain]: treesize reduction 48, result has 57.5 percent of original size [2021-06-05 22:13:57,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:13:57,845 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:57,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:57,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:13:57,873 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:57,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:57,896 INFO L518 ElimStorePlain]: Eliminatee ends_with_10 vanished before elimination [2021-06-05 22:13:57,897 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:13:57,897 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:117, output treesize:58 [2021-06-05 22:13:57,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:13:57,985 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:57,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:13:57,988 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:58,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:58,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:13:58,005 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:58,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:58,020 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:13:58,020 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:42, output treesize:16 [2021-06-05 22:13:58,053 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:13:58,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157857478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:58,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:58,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 22:13:58,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209174150] [2021-06-05 22:13:58,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:13:58,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:58,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:13:58,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:13:58,054 INFO L87 Difference]: Start difference. First operand 1620 states and 5633 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:58,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:13:58,887 INFO L93 Difference]: Finished difference Result 1842 states and 6264 transitions. [2021-06-05 22:13:58,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:13:58,887 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:13:58,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:13:58,889 INFO L225 Difference]: With dead ends: 1842 [2021-06-05 22:13:58,889 INFO L226 Difference]: Without dead ends: 1767 [2021-06-05 22:13:58,889 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 573.4ms TimeCoverageRelationStatistics Valid=160, Invalid=1100, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:13:58,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1767 states. [2021-06-05 22:13:58,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1767 to 1620. [2021-06-05 22:13:58,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1620 states, 1619 states have (on average 3.465101914762199) internal successors, (5610), 1619 states have internal predecessors, (5610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:58,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1620 states to 1620 states and 5610 transitions. [2021-06-05 22:13:58,905 INFO L78 Accepts]: Start accepts. Automaton has 1620 states and 5610 transitions. Word has length 24 [2021-06-05 22:13:58,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:13:58,906 INFO L482 AbstractCegarLoop]: Abstraction has 1620 states and 5610 transitions. [2021-06-05 22:13:58,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:13:58,906 INFO L276 IsEmpty]: Start isEmpty. Operand 1620 states and 5610 transitions. [2021-06-05 22:13:58,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:13:58,907 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:13:58,907 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:13:59,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7128,331 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:59,108 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:13:59,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:13:59,108 INFO L82 PathProgramCache]: Analyzing trace with hash 672807098, now seen corresponding path program 330 times [2021-06-05 22:13:59,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:13:59,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149535451] [2021-06-05 22:13:59,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:13:59,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:13:59,199 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:13:59,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:13:59,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149535451] [2021-06-05 22:13:59,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149535451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:59,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939372979] [2021-06-05 22:13:59,199 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:13:59,316 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:13:59,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:13:59,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:13:59,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:13:59,348 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:13:59,349 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:59,370 INFO L628 ElimStorePlain]: treesize reduction 2, result has 92.3 percent of original size [2021-06-05 22:13:59,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:13:59,373 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:59,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:13:59,383 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:13:59,383 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:20 [2021-06-05 22:13:59,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:13:59,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:59,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:13:59,432 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:59,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:13:59,435 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:59,471 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-06-05 22:13:59,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:13:59,474 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:59,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:13:59,477 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:13:59,503 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-05 22:13:59,504 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:13:59,504 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-05 22:13:59,549 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:13:59,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939372979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:13:59,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:13:59,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 15 [2021-06-05 22:13:59,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537135319] [2021-06-05 22:13:59,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:13:59,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:13:59,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:13:59,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:13:59,550 INFO L87 Difference]: Start difference. First operand 1620 states and 5610 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:00,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:00,195 INFO L93 Difference]: Finished difference Result 1843 states and 6268 transitions. [2021-06-05 22:14:00,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:14:00,196 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:14:00,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:00,198 INFO L225 Difference]: With dead ends: 1843 [2021-06-05 22:14:00,198 INFO L226 Difference]: Without dead ends: 1774 [2021-06-05 22:14:00,198 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 432.3ms TimeCoverageRelationStatistics Valid=157, Invalid=965, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:14:00,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1774 states. [2021-06-05 22:14:00,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1774 to 1601. [2021-06-05 22:14:00,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1601 states, 1600 states have (on average 3.465625) internal successors, (5545), 1600 states have internal predecessors, (5545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:00,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1601 states to 1601 states and 5545 transitions. [2021-06-05 22:14:00,215 INFO L78 Accepts]: Start accepts. Automaton has 1601 states and 5545 transitions. Word has length 24 [2021-06-05 22:14:00,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:00,215 INFO L482 AbstractCegarLoop]: Abstraction has 1601 states and 5545 transitions. [2021-06-05 22:14:00,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:00,215 INFO L276 IsEmpty]: Start isEmpty. Operand 1601 states and 5545 transitions. [2021-06-05 22:14:00,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:14:00,216 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:00,216 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:00,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7140,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:00,417 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:00,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:00,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1848297742, now seen corresponding path program 331 times [2021-06-05 22:14:00,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:00,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058582163] [2021-06-05 22:14:00,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:00,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:00,562 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:00,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:00,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058582163] [2021-06-05 22:14:00,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058582163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:00,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844800177] [2021-06-05 22:14:00,562 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:00,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:00,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:14:00,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:00,840 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:14:00,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844800177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:00,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:00,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-05 22:14:00,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190863802] [2021-06-05 22:14:00,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:14:00,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:00,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:14:00,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:14:00,840 INFO L87 Difference]: Start difference. First operand 1601 states and 5545 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:02,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:02,926 INFO L93 Difference]: Finished difference Result 2411 states and 7945 transitions. [2021-06-05 22:14:02,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 22:14:02,926 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:14:02,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:02,929 INFO L225 Difference]: With dead ends: 2411 [2021-06-05 22:14:02,929 INFO L226 Difference]: Without dead ends: 2263 [2021-06-05 22:14:02,930 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1355 ImplicationChecksByTransitivity, 1650.6ms TimeCoverageRelationStatistics Valid=543, Invalid=4149, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 22:14:02,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2263 states. [2021-06-05 22:14:02,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2263 to 1593. [2021-06-05 22:14:02,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1593 states, 1592 states have (on average 3.4673366834170856) internal successors, (5520), 1592 states have internal predecessors, (5520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:02,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1593 states to 1593 states and 5520 transitions. [2021-06-05 22:14:02,949 INFO L78 Accepts]: Start accepts. Automaton has 1593 states and 5520 transitions. Word has length 24 [2021-06-05 22:14:02,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:02,949 INFO L482 AbstractCegarLoop]: Abstraction has 1593 states and 5520 transitions. [2021-06-05 22:14:02,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:02,949 INFO L276 IsEmpty]: Start isEmpty. Operand 1593 states and 5520 transitions. [2021-06-05 22:14:02,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:14:02,951 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:02,951 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:03,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7147 [2021-06-05 22:14:03,151 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:03,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:03,151 INFO L82 PathProgramCache]: Analyzing trace with hash -366197958, now seen corresponding path program 332 times [2021-06-05 22:14:03,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:03,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483457450] [2021-06-05 22:14:03,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:03,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:03,280 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:03,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:03,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483457450] [2021-06-05 22:14:03,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483457450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:03,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012745137] [2021-06-05 22:14:03,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:03,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:14:03,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:03,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:14:03,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:03,616 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:14:03,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012745137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:03,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:03,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-05 22:14:03,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308798331] [2021-06-05 22:14:03,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:14:03,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:03,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:14:03,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:14:03,617 INFO L87 Difference]: Start difference. First operand 1593 states and 5520 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:06,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:06,049 INFO L93 Difference]: Finished difference Result 2287 states and 7567 transitions. [2021-06-05 22:14:06,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 22:14:06,050 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:14:06,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:06,053 INFO L225 Difference]: With dead ends: 2287 [2021-06-05 22:14:06,053 INFO L226 Difference]: Without dead ends: 2127 [2021-06-05 22:14:06,053 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1631 ImplicationChecksByTransitivity, 1926.2ms TimeCoverageRelationStatistics Valid=596, Invalid=4806, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 22:14:06,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2127 states. [2021-06-05 22:14:06,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2127 to 1582. [2021-06-05 22:14:06,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1582 states, 1581 states have (on average 3.476913345983555) internal successors, (5497), 1581 states have internal predecessors, (5497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:06,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 5497 transitions. [2021-06-05 22:14:06,074 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 5497 transitions. Word has length 24 [2021-06-05 22:14:06,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:06,074 INFO L482 AbstractCegarLoop]: Abstraction has 1582 states and 5497 transitions. [2021-06-05 22:14:06,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:06,074 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 5497 transitions. [2021-06-05 22:14:06,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:14:06,076 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:06,076 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:06,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7154,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:06,276 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:06,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:06,277 INFO L82 PathProgramCache]: Analyzing trace with hash -296087922, now seen corresponding path program 333 times [2021-06-05 22:14:06,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:06,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834102329] [2021-06-05 22:14:06,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:06,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:06,378 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:06,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:06,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834102329] [2021-06-05 22:14:06,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834102329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:06,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089860745] [2021-06-05 22:14:06,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:06,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:14:06,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:06,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:14:06,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:06,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 22:14:06,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:06,622 INFO L628 ElimStorePlain]: treesize reduction 6, result has 94.3 percent of original size [2021-06-05 22:14:06,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 22:14:06,625 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:06,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:14:06,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 22:14:06,663 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:06,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 22:14:06,666 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:06,714 INFO L628 ElimStorePlain]: treesize reduction 21, result has 74.7 percent of original size [2021-06-05 22:14:06,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:14:06,715 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:111, output treesize:62 [2021-06-05 22:14:06,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:14:06,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:06,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:06,826 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:06,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:06,830 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:06,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:06,833 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:06,900 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.6 percent of original size [2021-06-05 22:14:06,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:06,904 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:06,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:06,907 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:06,957 INFO L628 ElimStorePlain]: treesize reduction 15, result has 79.7 percent of original size [2021-06-05 22:14:06,958 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:14:06,958 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:99, output treesize:43 [2021-06-05 22:14:07,037 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:14:07,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089860745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:07,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:07,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 22:14:07,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140583746] [2021-06-05 22:14:07,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:14:07,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:07,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:14:07,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:14:07,038 INFO L87 Difference]: Start difference. First operand 1582 states and 5497 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:07,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:07,875 INFO L93 Difference]: Finished difference Result 1916 states and 6490 transitions. [2021-06-05 22:14:07,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:14:07,875 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:14:07,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:07,878 INFO L225 Difference]: With dead ends: 1916 [2021-06-05 22:14:07,878 INFO L226 Difference]: Without dead ends: 1856 [2021-06-05 22:14:07,878 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 621.9ms TimeCoverageRelationStatistics Valid=218, Invalid=1042, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:14:07,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1856 states. [2021-06-05 22:14:07,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1856 to 1606. [2021-06-05 22:14:07,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1606 states, 1605 states have (on average 3.485981308411215) internal successors, (5595), 1605 states have internal predecessors, (5595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:07,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 5595 transitions. [2021-06-05 22:14:07,896 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 5595 transitions. Word has length 24 [2021-06-05 22:14:07,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:07,896 INFO L482 AbstractCegarLoop]: Abstraction has 1606 states and 5595 transitions. [2021-06-05 22:14:07,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:07,896 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 5595 transitions. [2021-06-05 22:14:07,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:14:07,898 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:07,898 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:08,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7164 [2021-06-05 22:14:08,098 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:08,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:08,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1317478812, now seen corresponding path program 334 times [2021-06-05 22:14:08,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:08,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134383185] [2021-06-05 22:14:08,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:08,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:08,208 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:08,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:08,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134383185] [2021-06-05 22:14:08,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134383185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:08,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618500220] [2021-06-05 22:14:08,208 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:08,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:14:08,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:08,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:14:08,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:08,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 22:14:08,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:08,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 22:14:08,386 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:08,388 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:08,389 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:08,456 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.0 percent of original size [2021-06-05 22:14:08,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 22:14:08,460 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:08,508 INFO L628 ElimStorePlain]: treesize reduction 26, result has 72.0 percent of original size [2021-06-05 22:14:08,508 INFO L518 ElimStorePlain]: Eliminatee v_prenex_282 vanished before elimination [2021-06-05 22:14:08,509 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:14:08,509 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:142, output treesize:67 [2021-06-05 22:14:08,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:08,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:08,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:08,616 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:08,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:08,619 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:08,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:14:08,623 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:08,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:08,626 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:08,686 INFO L628 ElimStorePlain]: treesize reduction 19, result has 79.3 percent of original size [2021-06-05 22:14:08,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:08,690 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:08,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:08,693 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:08,732 INFO L628 ElimStorePlain]: treesize reduction 15, result has 76.9 percent of original size [2021-06-05 22:14:08,733 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:14:08,733 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 3 variables, input treesize:111, output treesize:34 [2021-06-05 22:14:08,807 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:14:08,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618500220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:08,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:08,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 22:14:08,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183448506] [2021-06-05 22:14:08,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:14:08,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:08,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:14:08,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:14:08,808 INFO L87 Difference]: Start difference. First operand 1606 states and 5595 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:10,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:10,012 INFO L93 Difference]: Finished difference Result 1985 states and 6653 transitions. [2021-06-05 22:14:10,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 22:14:10,012 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:14:10,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:10,015 INFO L225 Difference]: With dead ends: 1985 [2021-06-05 22:14:10,015 INFO L226 Difference]: Without dead ends: 1906 [2021-06-05 22:14:10,015 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 897.9ms TimeCoverageRelationStatistics Valid=226, Invalid=1414, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:14:10,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1906 states. [2021-06-05 22:14:10,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1906 to 1545. [2021-06-05 22:14:10,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1545 states, 1544 states have (on average 3.461139896373057) internal successors, (5344), 1544 states have internal predecessors, (5344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:10,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1545 states to 1545 states and 5344 transitions. [2021-06-05 22:14:10,033 INFO L78 Accepts]: Start accepts. Automaton has 1545 states and 5344 transitions. Word has length 24 [2021-06-05 22:14:10,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:10,033 INFO L482 AbstractCegarLoop]: Abstraction has 1545 states and 5344 transitions. [2021-06-05 22:14:10,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:10,033 INFO L276 IsEmpty]: Start isEmpty. Operand 1545 states and 5344 transitions. [2021-06-05 22:14:10,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:14:10,035 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:10,035 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:10,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7180,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:10,236 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:10,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:10,236 INFO L82 PathProgramCache]: Analyzing trace with hash -201559986, now seen corresponding path program 335 times [2021-06-05 22:14:10,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:10,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011180852] [2021-06-05 22:14:10,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:10,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:10,325 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:10,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:10,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011180852] [2021-06-05 22:14:10,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011180852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:10,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468075515] [2021-06-05 22:14:10,326 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:10,442 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:14:10,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:10,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:14:10,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:10,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 22:14:10,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:10,594 INFO L628 ElimStorePlain]: treesize reduction 31, result has 81.3 percent of original size [2021-06-05 22:14:10,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 22:14:10,598 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:10,685 INFO L628 ElimStorePlain]: treesize reduction 6, result has 95.4 percent of original size [2021-06-05 22:14:10,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 22:14:10,689 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:10,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 22:14:10,693 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:10,744 INFO L628 ElimStorePlain]: treesize reduction 50, result has 55.4 percent of original size [2021-06-05 22:14:10,744 INFO L518 ElimStorePlain]: Eliminatee v_prenex_284 vanished before elimination [2021-06-05 22:14:10,745 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:14:10,745 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:171, output treesize:62 [2021-06-05 22:14:10,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:10,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:10,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:14:10,878 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:10,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:14:10,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:10,896 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:10,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:14:10,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:14:10,911 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:42, output treesize:16 [2021-06-05 22:14:10,946 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:14:10,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468075515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:10,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:10,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 22:14:10,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445172312] [2021-06-05 22:14:10,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:14:10,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:10,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:14:10,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:14:10,947 INFO L87 Difference]: Start difference. First operand 1545 states and 5344 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:11,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:11,919 INFO L93 Difference]: Finished difference Result 1877 states and 6305 transitions. [2021-06-05 22:14:11,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 22:14:11,919 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:14:11,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:11,922 INFO L225 Difference]: With dead ends: 1877 [2021-06-05 22:14:11,922 INFO L226 Difference]: Without dead ends: 1800 [2021-06-05 22:14:11,922 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 757.1ms TimeCoverageRelationStatistics Valid=186, Invalid=1374, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:14:11,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1800 states. [2021-06-05 22:14:11,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1800 to 1534. [2021-06-05 22:14:11,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1534 states, 1533 states have (on average 3.4494455316373123) internal successors, (5288), 1533 states have internal predecessors, (5288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:11,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1534 states to 1534 states and 5288 transitions. [2021-06-05 22:14:11,938 INFO L78 Accepts]: Start accepts. Automaton has 1534 states and 5288 transitions. Word has length 24 [2021-06-05 22:14:11,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:11,938 INFO L482 AbstractCegarLoop]: Abstraction has 1534 states and 5288 transitions. [2021-06-05 22:14:11,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:11,938 INFO L276 IsEmpty]: Start isEmpty. Operand 1534 states and 5288 transitions. [2021-06-05 22:14:11,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:14:11,940 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:11,940 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:12,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7197 [2021-06-05 22:14:12,140 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:12,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:12,141 INFO L82 PathProgramCache]: Analyzing trace with hash -47122468, now seen corresponding path program 336 times [2021-06-05 22:14:12,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:12,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877164093] [2021-06-05 22:14:12,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:12,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:12,225 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:12,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:12,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877164093] [2021-06-05 22:14:12,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877164093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:12,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791392290] [2021-06-05 22:14:12,225 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:12,343 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:14:12,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:12,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:14:12,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:12,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 22:14:12,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:12,522 INFO L628 ElimStorePlain]: treesize reduction 32, result has 75.8 percent of original size [2021-06-05 22:14:12,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 22:14:12,526 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:12,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:14:12,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 22:14:12,577 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:12,647 INFO L628 ElimStorePlain]: treesize reduction 21, result has 76.1 percent of original size [2021-06-05 22:14:12,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 22:14:12,651 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:12,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:14:12,684 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:14:12,684 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:137, output treesize:62 [2021-06-05 22:14:12,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:12,801 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:12,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:14:12,804 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:12,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:14:12,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:12,822 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:12,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:14:12,836 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:14:12,837 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:42, output treesize:16 [2021-06-05 22:14:12,871 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:14:12,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791392290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:12,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:12,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 22:14:12,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086747864] [2021-06-05 22:14:12,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:14:12,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:12,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:14:12,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:14:12,872 INFO L87 Difference]: Start difference. First operand 1534 states and 5288 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:13,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:13,835 INFO L93 Difference]: Finished difference Result 1768 states and 5949 transitions. [2021-06-05 22:14:13,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:14:13,835 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:14:13,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:13,838 INFO L225 Difference]: With dead ends: 1768 [2021-06-05 22:14:13,838 INFO L226 Difference]: Without dead ends: 1677 [2021-06-05 22:14:13,838 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 705.9ms TimeCoverageRelationStatistics Valid=164, Invalid=1168, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:14:13,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1677 states. [2021-06-05 22:14:13,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1677 to 1513. [2021-06-05 22:14:13,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1513 states, 1512 states have (on average 3.447089947089947) internal successors, (5212), 1512 states have internal predecessors, (5212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:13,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1513 states to 1513 states and 5212 transitions. [2021-06-05 22:14:13,853 INFO L78 Accepts]: Start accepts. Automaton has 1513 states and 5212 transitions. Word has length 24 [2021-06-05 22:14:13,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:13,853 INFO L482 AbstractCegarLoop]: Abstraction has 1513 states and 5212 transitions. [2021-06-05 22:14:13,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:13,853 INFO L276 IsEmpty]: Start isEmpty. Operand 1513 states and 5212 transitions. [2021-06-05 22:14:13,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:14:13,855 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:13,855 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:14,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7211 [2021-06-05 22:14:14,055 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:14,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:14,055 INFO L82 PathProgramCache]: Analyzing trace with hash -841957494, now seen corresponding path program 337 times [2021-06-05 22:14:14,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:14,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564657308] [2021-06-05 22:14:14,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:14,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:14,191 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:14,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:14,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564657308] [2021-06-05 22:14:14,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564657308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:14,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879600855] [2021-06-05 22:14:14,191 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:14,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:14,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:14:14,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:14,504 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:14:14,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879600855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:14,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:14,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-05 22:14:14,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143946212] [2021-06-05 22:14:14,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:14:14,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:14,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:14:14,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:14:14,505 INFO L87 Difference]: Start difference. First operand 1513 states and 5212 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:17,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:17,044 INFO L93 Difference]: Finished difference Result 2288 states and 7400 transitions. [2021-06-05 22:14:17,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 22:14:17,044 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:14:17,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:17,047 INFO L225 Difference]: With dead ends: 2288 [2021-06-05 22:14:17,047 INFO L226 Difference]: Without dead ends: 2168 [2021-06-05 22:14:17,048 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 1920.2ms TimeCoverageRelationStatistics Valid=573, Invalid=3849, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 22:14:17,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2168 states. [2021-06-05 22:14:17,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2168 to 1520. [2021-06-05 22:14:17,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1520 states, 1519 states have (on average 3.4476629361421987) internal successors, (5237), 1519 states have internal predecessors, (5237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:17,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1520 states to 1520 states and 5237 transitions. [2021-06-05 22:14:17,066 INFO L78 Accepts]: Start accepts. Automaton has 1520 states and 5237 transitions. Word has length 24 [2021-06-05 22:14:17,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:17,066 INFO L482 AbstractCegarLoop]: Abstraction has 1520 states and 5237 transitions. [2021-06-05 22:14:17,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:17,066 INFO L276 IsEmpty]: Start isEmpty. Operand 1520 states and 5237 transitions. [2021-06-05 22:14:17,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:14:17,068 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:17,068 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:17,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7224 [2021-06-05 22:14:17,268 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:17,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:17,269 INFO L82 PathProgramCache]: Analyzing trace with hash 771609240, now seen corresponding path program 338 times [2021-06-05 22:14:17,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:17,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458628545] [2021-06-05 22:14:17,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:17,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:17,482 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:17,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:17,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458628545] [2021-06-05 22:14:17,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458628545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:17,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564471402] [2021-06-05 22:14:17,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:17,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:14:17,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:17,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:14:17,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:17,848 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:14:17,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564471402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:17,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:17,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-05 22:14:17,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016963874] [2021-06-05 22:14:17,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:14:17,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:17,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:14:17,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:14:17,849 INFO L87 Difference]: Start difference. First operand 1520 states and 5237 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:20,595 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-06-05 22:14:21,017 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-06-05 22:14:21,397 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 38 [2021-06-05 22:14:21,657 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-06-05 22:14:22,315 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-06-05 22:14:22,678 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-06-05 22:14:22,819 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-06-05 22:14:23,355 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-06-05 22:14:23,542 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2021-06-05 22:14:23,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:23,874 INFO L93 Difference]: Finished difference Result 3187 states and 9796 transitions. [2021-06-05 22:14:23,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-05 22:14:23,875 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:14:23,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:23,878 INFO L225 Difference]: With dead ends: 3187 [2021-06-05 22:14:23,878 INFO L226 Difference]: Without dead ends: 2927 [2021-06-05 22:14:23,878 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2483 ImplicationChecksByTransitivity, 5131.0ms TimeCoverageRelationStatistics Valid=1010, Invalid=7180, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 22:14:23,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2927 states. [2021-06-05 22:14:23,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2927 to 1494. [2021-06-05 22:14:23,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1493 states have (on average 3.4166108506363027) internal successors, (5101), 1493 states have internal predecessors, (5101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:23,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 5101 transitions. [2021-06-05 22:14:23,900 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 5101 transitions. Word has length 24 [2021-06-05 22:14:23,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:23,900 INFO L482 AbstractCegarLoop]: Abstraction has 1494 states and 5101 transitions. [2021-06-05 22:14:23,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:23,900 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 5101 transitions. [2021-06-05 22:14:23,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:14:23,902 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:23,902 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:24,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7232 [2021-06-05 22:14:24,102 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:24,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:24,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1854467236, now seen corresponding path program 339 times [2021-06-05 22:14:24,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:24,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413130297] [2021-06-05 22:14:24,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:24,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:24,213 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:24,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:24,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413130297] [2021-06-05 22:14:24,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413130297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:24,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305940804] [2021-06-05 22:14:24,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:24,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:14:24,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:24,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:14:24,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:24,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:24,407 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:24,494 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.1 percent of original size [2021-06-05 22:14:24,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:14:24,498 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:24,565 INFO L628 ElimStorePlain]: treesize reduction 22, result has 79.8 percent of original size [2021-06-05 22:14:24,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:14:24,568 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:24,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:14:24,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:24,603 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:24,650 INFO L628 ElimStorePlain]: treesize reduction 19, result has 76.3 percent of original size [2021-06-05 22:14:24,652 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: 3 dim-0 vars, and 3 xjuncts. [2021-06-05 22:14:24,653 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:117, output treesize:61 [2021-06-05 22:14:24,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:14:24,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:24,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:24,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:14:24,875 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:24,901 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.8 percent of original size [2021-06-05 22:14:24,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:24,904 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:24,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:14:24,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:14:24,914 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:73, output treesize:11 [2021-06-05 22:14:24,953 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:14:24,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305940804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:24,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:24,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-06-05 22:14:24,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270878680] [2021-06-05 22:14:24,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:14:24,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:24,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:14:24,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:14:24,954 INFO L87 Difference]: Start difference. First operand 1494 states and 5101 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:26,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:26,325 INFO L93 Difference]: Finished difference Result 1883 states and 6189 transitions. [2021-06-05 22:14:26,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:14:26,326 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:14:26,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:26,328 INFO L225 Difference]: With dead ends: 1883 [2021-06-05 22:14:26,328 INFO L226 Difference]: Without dead ends: 1784 [2021-06-05 22:14:26,328 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1040.1ms TimeCoverageRelationStatistics Valid=246, Invalid=1476, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:14:26,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2021-06-05 22:14:26,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1474. [2021-06-05 22:14:26,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1474 states, 1473 states have (on average 3.415478615071283) internal successors, (5031), 1473 states have internal predecessors, (5031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:26,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 5031 transitions. [2021-06-05 22:14:26,345 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 5031 transitions. Word has length 24 [2021-06-05 22:14:26,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:26,345 INFO L482 AbstractCegarLoop]: Abstraction has 1474 states and 5031 transitions. [2021-06-05 22:14:26,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:26,346 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 5031 transitions. [2021-06-05 22:14:26,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:14:26,347 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:26,347 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:26,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7240 [2021-06-05 22:14:26,547 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:26,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:26,548 INFO L82 PathProgramCache]: Analyzing trace with hash 27651606, now seen corresponding path program 340 times [2021-06-05 22:14:26,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:26,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131682059] [2021-06-05 22:14:26,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:26,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:26,640 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:26,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:26,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131682059] [2021-06-05 22:14:26,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131682059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:26,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828621043] [2021-06-05 22:14:26,640 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:26,756 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:14:26,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:26,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:14:26,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:26,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 22:14:26,800 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:26,888 INFO L628 ElimStorePlain]: treesize reduction 63, result has 61.3 percent of original size [2021-06-05 22:14:26,888 INFO L518 ElimStorePlain]: Eliminatee v_prenex_297 vanished before elimination [2021-06-05 22:14:26,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 22:14:26,891 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:26,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 22:14:26,894 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:26,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:14:26,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 22:14:26,929 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:26,976 INFO L628 ElimStorePlain]: treesize reduction 21, result has 74.7 percent of original size [2021-06-05 22:14:26,977 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:14:26,977 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:168, output treesize:62 [2021-06-05 22:14:27,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:27,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:27,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:27,093 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:27,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:27,096 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:27,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:14:27,099 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:27,167 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.6 percent of original size [2021-06-05 22:14:27,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:27,170 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:27,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:27,173 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:27,223 INFO L628 ElimStorePlain]: treesize reduction 15, result has 79.7 percent of original size [2021-06-05 22:14:27,224 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:14:27,224 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:99, output treesize:43 [2021-06-05 22:14:27,303 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:14:27,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828621043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:27,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:27,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 22:14:27,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846605231] [2021-06-05 22:14:27,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:14:27,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:27,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:14:27,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:14:27,304 INFO L87 Difference]: Start difference. First operand 1474 states and 5031 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:28,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:28,463 INFO L93 Difference]: Finished difference Result 1848 states and 6050 transitions. [2021-06-05 22:14:28,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 22:14:28,463 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:14:28,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:28,466 INFO L225 Difference]: With dead ends: 1848 [2021-06-05 22:14:28,466 INFO L226 Difference]: Without dead ends: 1765 [2021-06-05 22:14:28,466 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 857.1ms TimeCoverageRelationStatistics Valid=226, Invalid=1414, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:14:28,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1765 states. [2021-06-05 22:14:28,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1765 to 1442. [2021-06-05 22:14:28,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 3.3795975017349065) internal successors, (4870), 1441 states have internal predecessors, (4870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:28,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 4870 transitions. [2021-06-05 22:14:28,482 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 4870 transitions. Word has length 24 [2021-06-05 22:14:28,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:28,482 INFO L482 AbstractCegarLoop]: Abstraction has 1442 states and 4870 transitions. [2021-06-05 22:14:28,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:28,482 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 4870 transitions. [2021-06-05 22:14:28,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:14:28,484 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:28,484 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:28,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7276,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:28,684 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:28,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:28,685 INFO L82 PathProgramCache]: Analyzing trace with hash 520247368, now seen corresponding path program 341 times [2021-06-05 22:14:28,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:28,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761035770] [2021-06-05 22:14:28,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:28,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:28,773 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:28,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:28,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761035770] [2021-06-05 22:14:28,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761035770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:28,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340710966] [2021-06-05 22:14:28,773 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:28,901 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:14:28,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:28,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:14:28,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:28,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 22:14:28,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:29,029 INFO L628 ElimStorePlain]: treesize reduction 63, result has 61.3 percent of original size [2021-06-05 22:14:29,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 22:14:29,032 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:29,086 INFO L628 ElimStorePlain]: treesize reduction 21, result has 77.7 percent of original size [2021-06-05 22:14:29,086 INFO L518 ElimStorePlain]: Eliminatee v_prenex_301 vanished before elimination [2021-06-05 22:14:29,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-05 22:14:29,089 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:29,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-05 22:14:29,092 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:29,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:14:29,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:14:29,116 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:168, output treesize:62 [2021-06-05 22:14:29,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:29,238 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:29,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:14:29,240 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:29,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:14:29,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:29,258 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:29,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:14:29,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:14:29,273 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:42, output treesize:16 [2021-06-05 22:14:29,309 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:14:29,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340710966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:29,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:29,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 22:14:29,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65692156] [2021-06-05 22:14:29,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:14:29,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:29,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:14:29,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:14:29,309 INFO L87 Difference]: Start difference. First operand 1442 states and 4870 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:30,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:30,362 INFO L93 Difference]: Finished difference Result 1760 states and 5793 transitions. [2021-06-05 22:14:30,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 22:14:30,362 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:14:30,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:30,364 INFO L225 Difference]: With dead ends: 1760 [2021-06-05 22:14:30,365 INFO L226 Difference]: Without dead ends: 1657 [2021-06-05 22:14:30,365 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 729.5ms TimeCoverageRelationStatistics Valid=186, Invalid=1374, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:14:30,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1657 states. [2021-06-05 22:14:30,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1657 to 1376. [2021-06-05 22:14:30,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1376 states, 1375 states have (on average 3.3767272727272726) internal successors, (4643), 1375 states have internal predecessors, (4643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:30,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1376 states to 1376 states and 4643 transitions. [2021-06-05 22:14:30,379 INFO L78 Accepts]: Start accepts. Automaton has 1376 states and 4643 transitions. Word has length 24 [2021-06-05 22:14:30,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:30,379 INFO L482 AbstractCegarLoop]: Abstraction has 1376 states and 4643 transitions. [2021-06-05 22:14:30,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:30,379 INFO L276 IsEmpty]: Start isEmpty. Operand 1376 states and 4643 transitions. [2021-06-05 22:14:30,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:14:30,381 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:30,381 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:30,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7291 [2021-06-05 22:14:30,581 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:30,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:30,582 INFO L82 PathProgramCache]: Analyzing trace with hash 326699018, now seen corresponding path program 342 times [2021-06-05 22:14:30,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:30,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644516568] [2021-06-05 22:14:30,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:30,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:30,693 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:30,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:30,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644516568] [2021-06-05 22:14:30,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644516568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:30,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194920764] [2021-06-05 22:14:30,694 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:30,812 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:14:30,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:30,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:14:30,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:30,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:30,883 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:30,940 INFO L628 ElimStorePlain]: treesize reduction 53, result has 55.1 percent of original size [2021-06-05 22:14:30,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:30,943 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:30,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:14:30,946 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:30,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:14:30,969 INFO L518 ElimStorePlain]: Eliminatee v_prenex_303 vanished before elimination [2021-06-05 22:14:30,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:14:30,970 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:122, output treesize:58 [2021-06-05 22:14:31,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:31,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:31,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:31,055 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:31,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:14:31,060 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:31,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:31,064 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:31,148 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.6 percent of original size [2021-06-05 22:14:31,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:31,151 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:31,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:31,154 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:31,203 INFO L628 ElimStorePlain]: treesize reduction 15, result has 79.7 percent of original size [2021-06-05 22:14:31,204 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:14:31,204 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:99, output treesize:43 [2021-06-05 22:14:31,272 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:14:31,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194920764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:31,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:31,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 15 [2021-06-05 22:14:31,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851231854] [2021-06-05 22:14:31,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:14:31,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:31,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:14:31,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:14:31,273 INFO L87 Difference]: Start difference. First operand 1376 states and 4643 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:32,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:32,005 INFO L93 Difference]: Finished difference Result 1650 states and 5378 transitions. [2021-06-05 22:14:32,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:14:32,005 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:14:32,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:32,007 INFO L225 Difference]: With dead ends: 1650 [2021-06-05 22:14:32,008 INFO L226 Difference]: Without dead ends: 1576 [2021-06-05 22:14:32,008 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 579.2ms TimeCoverageRelationStatistics Valid=227, Invalid=963, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:14:32,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1576 states. [2021-06-05 22:14:32,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1576 to 1358. [2021-06-05 22:14:32,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1358 states, 1357 states have (on average 3.3559322033898304) internal successors, (4554), 1357 states have internal predecessors, (4554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:32,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1358 states to 1358 states and 4554 transitions. [2021-06-05 22:14:32,024 INFO L78 Accepts]: Start accepts. Automaton has 1358 states and 4554 transitions. Word has length 24 [2021-06-05 22:14:32,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:32,024 INFO L482 AbstractCegarLoop]: Abstraction has 1358 states and 4554 transitions. [2021-06-05 22:14:32,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:32,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1358 states and 4554 transitions. [2021-06-05 22:14:32,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:14:32,025 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:32,025 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:32,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7304,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:32,226 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:32,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:32,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1617240540, now seen corresponding path program 343 times [2021-06-05 22:14:32,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:32,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854628386] [2021-06-05 22:14:32,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:32,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:32,312 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:32,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:32,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854628386] [2021-06-05 22:14:32,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854628386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:32,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927663049] [2021-06-05 22:14:32,313 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:32,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:32,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:14:32,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:32,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:32,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:32,570 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.9 percent of original size [2021-06-05 22:14:32,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:14:32,573 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:32,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:14:32,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:32,610 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:32,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:14:32,613 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:32,659 INFO L628 ElimStorePlain]: treesize reduction 19, result has 76.3 percent of original size [2021-06-05 22:14:32,660 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:14:32,660 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:95, output treesize:61 [2021-06-05 22:14:32,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:32,724 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:32,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:32,727 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:32,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:32,730 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:32,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:32,733 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:32,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:14:32,736 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:32,795 INFO L628 ElimStorePlain]: treesize reduction 19, result has 79.3 percent of original size [2021-06-05 22:14:32,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:32,799 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:32,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:32,802 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:32,841 INFO L628 ElimStorePlain]: treesize reduction 15, result has 76.9 percent of original size [2021-06-05 22:14:32,842 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:14:32,842 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 3 variables, input treesize:111, output treesize:34 [2021-06-05 22:14:32,904 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:14:32,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927663049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:32,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:32,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 15 [2021-06-05 22:14:32,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987650872] [2021-06-05 22:14:32,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:14:32,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:32,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:14:32,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:14:32,904 INFO L87 Difference]: Start difference. First operand 1358 states and 4554 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:33,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:33,829 INFO L93 Difference]: Finished difference Result 1627 states and 5306 transitions. [2021-06-05 22:14:33,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 22:14:33,829 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:14:33,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:33,831 INFO L225 Difference]: With dead ends: 1627 [2021-06-05 22:14:33,831 INFO L226 Difference]: Without dead ends: 1534 [2021-06-05 22:14:33,832 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 710.2ms TimeCoverageRelationStatistics Valid=210, Invalid=1272, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:14:33,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1534 states. [2021-06-05 22:14:33,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1534 to 1251. [2021-06-05 22:14:33,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 1250 states have (on average 3.344) internal successors, (4180), 1250 states have internal predecessors, (4180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:33,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 4180 transitions. [2021-06-05 22:14:33,845 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 4180 transitions. Word has length 24 [2021-06-05 22:14:33,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:33,845 INFO L482 AbstractCegarLoop]: Abstraction has 1251 states and 4180 transitions. [2021-06-05 22:14:33,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:33,845 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 4180 transitions. [2021-06-05 22:14:33,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:14:33,846 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:33,846 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:34,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7318 [2021-06-05 22:14:34,047 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:34,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:34,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1252048260, now seen corresponding path program 344 times [2021-06-05 22:14:34,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:34,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708326806] [2021-06-05 22:14:34,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:34,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:34,133 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:14:34,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:34,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708326806] [2021-06-05 22:14:34,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708326806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:34,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788893811] [2021-06-05 22:14:34,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:34,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:14:34,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:34,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:14:34,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:34,440 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:14:34,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788893811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:34,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:34,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:14:34,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439110232] [2021-06-05 22:14:34,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:14:34,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:34,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:14:34,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:14:34,441 INFO L87 Difference]: Start difference. First operand 1251 states and 4180 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:34,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:34,627 INFO L93 Difference]: Finished difference Result 1572 states and 5105 transitions. [2021-06-05 22:14:34,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:14:34,628 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:14:34,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:34,629 INFO L225 Difference]: With dead ends: 1572 [2021-06-05 22:14:34,629 INFO L226 Difference]: Without dead ends: 1509 [2021-06-05 22:14:34,629 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 267.9ms TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:14:34,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1509 states. [2021-06-05 22:14:34,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1509 to 1251. [2021-06-05 22:14:34,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 1250 states have (on average 3.344) internal successors, (4180), 1250 states have internal predecessors, (4180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:34,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 4180 transitions. [2021-06-05 22:14:34,642 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 4180 transitions. Word has length 24 [2021-06-05 22:14:34,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:34,642 INFO L482 AbstractCegarLoop]: Abstraction has 1251 states and 4180 transitions. [2021-06-05 22:14:34,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:34,642 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 4180 transitions. [2021-06-05 22:14:34,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:14:34,643 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:34,643 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:34,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7337,346 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:34,844 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:34,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:34,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1133518474, now seen corresponding path program 345 times [2021-06-05 22:14:34,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:34,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741742939] [2021-06-05 22:14:34,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:34,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:34,924 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:14:34,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:34,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741742939] [2021-06-05 22:14:34,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741742939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:34,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281385769] [2021-06-05 22:14:34,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:35,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:14:35,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:35,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:14:35,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:35,210 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:14:35,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281385769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:35,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:35,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:14:35,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379375436] [2021-06-05 22:14:35,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:14:35,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:35,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:14:35,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:14:35,211 INFO L87 Difference]: Start difference. First operand 1251 states and 4180 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:35,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:35,362 INFO L93 Difference]: Finished difference Result 1425 states and 4662 transitions. [2021-06-05 22:14:35,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:14:35,362 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:14:35,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:35,364 INFO L225 Difference]: With dead ends: 1425 [2021-06-05 22:14:35,364 INFO L226 Difference]: Without dead ends: 1342 [2021-06-05 22:14:35,364 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 214.2ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:14:35,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2021-06-05 22:14:35,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 1198. [2021-06-05 22:14:35,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 3.343358395989975) internal successors, (4002), 1197 states have internal predecessors, (4002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:35,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 4002 transitions. [2021-06-05 22:14:35,375 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 4002 transitions. Word has length 24 [2021-06-05 22:14:35,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:35,375 INFO L482 AbstractCegarLoop]: Abstraction has 1198 states and 4002 transitions. [2021-06-05 22:14:35,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:35,375 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 4002 transitions. [2021-06-05 22:14:35,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:14:35,377 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:35,377 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:35,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7348,347 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:35,577 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:35,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:35,578 INFO L82 PathProgramCache]: Analyzing trace with hash 581879458, now seen corresponding path program 346 times [2021-06-05 22:14:35,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:35,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098008691] [2021-06-05 22:14:35,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:35,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:35,664 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:14:35,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:35,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098008691] [2021-06-05 22:14:35,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098008691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:35,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622994255] [2021-06-05 22:14:35,664 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:35,781 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:14:35,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:35,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:14:35,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:35,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:35,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:35,837 INFO L628 ElimStorePlain]: treesize reduction 2, result has 87.5 percent of original size [2021-06-05 22:14:35,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:14:35,838 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:14 [2021-06-05 22:14:35,976 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:14:35,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622994255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:35,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:35,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 22:14:35,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79041112] [2021-06-05 22:14:35,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:14:35,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:35,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:14:35,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:14:35,977 INFO L87 Difference]: Start difference. First operand 1198 states and 4002 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:36,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:36,128 INFO L93 Difference]: Finished difference Result 1478 states and 4858 transitions. [2021-06-05 22:14:36,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:14:36,128 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:14:36,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:36,130 INFO L225 Difference]: With dead ends: 1478 [2021-06-05 22:14:36,130 INFO L226 Difference]: Without dead ends: 1415 [2021-06-05 22:14:36,130 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 198.8ms TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:14:36,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2021-06-05 22:14:36,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 1173. [2021-06-05 22:14:36,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1173 states, 1172 states have (on average 3.319965870307167) internal successors, (3891), 1172 states have internal predecessors, (3891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:36,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 3891 transitions. [2021-06-05 22:14:36,142 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 3891 transitions. Word has length 24 [2021-06-05 22:14:36,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:36,142 INFO L482 AbstractCegarLoop]: Abstraction has 1173 states and 3891 transitions. [2021-06-05 22:14:36,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:36,142 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 3891 transitions. [2021-06-05 22:14:36,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:14:36,143 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:36,143 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:36,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7360,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:36,343 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:36,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:36,344 INFO L82 PathProgramCache]: Analyzing trace with hash -761852682, now seen corresponding path program 347 times [2021-06-05 22:14:36,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:36,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820441860] [2021-06-05 22:14:36,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:36,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:36,433 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:14:36,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:36,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820441860] [2021-06-05 22:14:36,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820441860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:36,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499361948] [2021-06-05 22:14:36,434 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:36,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:14:36,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:36,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:14:36,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:36,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:36,621 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:36,694 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.0 percent of original size [2021-06-05 22:14:36,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:36,698 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:36,740 INFO L628 ElimStorePlain]: treesize reduction 38, result has 59.1 percent of original size [2021-06-05 22:14:36,741 INFO L518 ElimStorePlain]: Eliminatee v_prenex_308 vanished before elimination [2021-06-05 22:14:36,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:14:36,744 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:36,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:14:36,763 INFO L518 ElimStorePlain]: Eliminatee v_prenex_309 vanished before elimination [2021-06-05 22:14:36,764 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:14:36,764 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:102, output treesize:52 [2021-06-05 22:14:36,870 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:14:36,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499361948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:36,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:36,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 22:14:36,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082771497] [2021-06-05 22:14:36,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:14:36,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:36,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:14:36,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:14:36,871 INFO L87 Difference]: Start difference. First operand 1173 states and 3891 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:37,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:37,065 INFO L93 Difference]: Finished difference Result 1470 states and 4693 transitions. [2021-06-05 22:14:37,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:14:37,065 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:14:37,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:37,067 INFO L225 Difference]: With dead ends: 1470 [2021-06-05 22:14:37,067 INFO L226 Difference]: Without dead ends: 1407 [2021-06-05 22:14:37,067 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 266.1ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:14:37,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1407 states. [2021-06-05 22:14:37,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1407 to 1130. [2021-06-05 22:14:37,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1130 states, 1129 states have (on average 3.2719220549158545) internal successors, (3694), 1129 states have internal predecessors, (3694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:37,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1130 states to 1130 states and 3694 transitions. [2021-06-05 22:14:37,079 INFO L78 Accepts]: Start accepts. Automaton has 1130 states and 3694 transitions. Word has length 24 [2021-06-05 22:14:37,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:37,079 INFO L482 AbstractCegarLoop]: Abstraction has 1130 states and 3694 transitions. [2021-06-05 22:14:37,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:37,079 INFO L276 IsEmpty]: Start isEmpty. Operand 1130 states and 3694 transitions. [2021-06-05 22:14:37,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:14:37,080 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:37,080 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:37,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7383,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:37,281 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:37,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:37,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1623714052, now seen corresponding path program 348 times [2021-06-05 22:14:37,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:37,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928116124] [2021-06-05 22:14:37,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:37,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:37,360 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:14:37,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:37,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928116124] [2021-06-05 22:14:37,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928116124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:37,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34380216] [2021-06-05 22:14:37,361 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:37,480 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:14:37,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:37,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:14:37,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:37,655 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:14:37,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34380216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:37,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:37,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:14:37,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973520984] [2021-06-05 22:14:37,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:14:37,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:37,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:14:37,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:14:37,656 INFO L87 Difference]: Start difference. First operand 1130 states and 3694 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:37,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:37,842 INFO L93 Difference]: Finished difference Result 1323 states and 4250 transitions. [2021-06-05 22:14:37,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:14:37,842 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:14:37,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:37,843 INFO L225 Difference]: With dead ends: 1323 [2021-06-05 22:14:37,843 INFO L226 Difference]: Without dead ends: 1248 [2021-06-05 22:14:37,843 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 242.5ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:14:37,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-06-05 22:14:37,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 1088. [2021-06-05 22:14:37,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1088 states, 1087 states have (on average 3.2594296228150874) internal successors, (3543), 1087 states have internal predecessors, (3543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:37,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1088 states to 1088 states and 3543 transitions. [2021-06-05 22:14:37,854 INFO L78 Accepts]: Start accepts. Automaton has 1088 states and 3543 transitions. Word has length 24 [2021-06-05 22:14:37,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:37,854 INFO L482 AbstractCegarLoop]: Abstraction has 1088 states and 3543 transitions. [2021-06-05 22:14:37,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:37,854 INFO L276 IsEmpty]: Start isEmpty. Operand 1088 states and 3543 transitions. [2021-06-05 22:14:37,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:14:37,855 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:37,855 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:38,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7400 [2021-06-05 22:14:38,056 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:38,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:38,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1130511476, now seen corresponding path program 349 times [2021-06-05 22:14:38,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:38,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614066705] [2021-06-05 22:14:38,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:38,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:38,129 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:38,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:38,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614066705] [2021-06-05 22:14:38,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614066705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:38,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669782908] [2021-06-05 22:14:38,129 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:38,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:38,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 22:14:38,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:38,572 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_310, ends_with_6], 1=[ends_with_10]} [2021-06-05 22:14:38,575 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:38,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:38,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:14:38,579 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:38,670 INFO L628 ElimStorePlain]: treesize reduction 145, result has 39.3 percent of original size [2021-06-05 22:14:38,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:38,674 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:38,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:38,677 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:38,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:14:38,680 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:38,732 INFO L628 ElimStorePlain]: treesize reduction 21, result has 74.7 percent of original size [2021-06-05 22:14:38,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:38,736 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:38,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:38,739 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:38,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:14:38,741 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:38,779 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.0 percent of original size [2021-06-05 22:14:38,780 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:14:38,780 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:268, output treesize:24 [2021-06-05 22:14:38,832 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:38,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669782908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:38,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:38,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:14:38,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359060634] [2021-06-05 22:14:38,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:14:38,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:38,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:14:38,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:14:38,833 INFO L87 Difference]: Start difference. First operand 1088 states and 3543 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:39,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:39,049 INFO L93 Difference]: Finished difference Result 1584 states and 5045 transitions. [2021-06-05 22:14:39,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:14:39,050 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:14:39,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:39,052 INFO L225 Difference]: With dead ends: 1584 [2021-06-05 22:14:39,052 INFO L226 Difference]: Without dead ends: 1515 [2021-06-05 22:14:39,052 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 264.1ms TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:14:39,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2021-06-05 22:14:39,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 1136. [2021-06-05 22:14:39,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1135 states have (on average 3.289867841409692) internal successors, (3734), 1135 states have internal predecessors, (3734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:39,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 3734 transitions. [2021-06-05 22:14:39,064 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 3734 transitions. Word has length 24 [2021-06-05 22:14:39,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:39,064 INFO L482 AbstractCegarLoop]: Abstraction has 1136 states and 3734 transitions. [2021-06-05 22:14:39,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:39,064 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 3734 transitions. [2021-06-05 22:14:39,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:14:39,065 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:39,066 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:39,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7412 [2021-06-05 22:14:39,266 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:39,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:39,266 INFO L82 PathProgramCache]: Analyzing trace with hash 54570504, now seen corresponding path program 350 times [2021-06-05 22:14:39,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:39,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295910116] [2021-06-05 22:14:39,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:39,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:39,355 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:39,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:39,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295910116] [2021-06-05 22:14:39,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295910116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:39,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955996410] [2021-06-05 22:14:39,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:39,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:14:39,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:39,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 22:14:39,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:39,816 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_311, ends_with_6], 1=[ends_with_10]} [2021-06-05 22:14:39,819 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:39,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:39,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:14:39,823 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:39,912 INFO L628 ElimStorePlain]: treesize reduction 145, result has 39.3 percent of original size [2021-06-05 22:14:39,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:39,916 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:39,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:39,919 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:39,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:14:39,922 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:39,973 INFO L628 ElimStorePlain]: treesize reduction 21, result has 74.7 percent of original size [2021-06-05 22:14:39,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:39,976 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:39,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:39,979 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:39,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:14:39,982 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:40,019 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.0 percent of original size [2021-06-05 22:14:40,030 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:14:40,030 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:268, output treesize:24 [2021-06-05 22:14:40,094 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:40,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955996410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:40,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:40,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:14:40,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023568235] [2021-06-05 22:14:40,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:14:40,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:40,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:14:40,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:14:40,095 INFO L87 Difference]: Start difference. First operand 1136 states and 3734 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:40,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:40,352 INFO L93 Difference]: Finished difference Result 1687 states and 5370 transitions. [2021-06-05 22:14:40,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:14:40,353 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:14:40,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:40,355 INFO L225 Difference]: With dead ends: 1687 [2021-06-05 22:14:40,355 INFO L226 Difference]: Without dead ends: 1635 [2021-06-05 22:14:40,355 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 324.5ms TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:14:40,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-06-05 22:14:40,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1134. [2021-06-05 22:14:40,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1134 states, 1133 states have (on average 3.2983230361871136) internal successors, (3737), 1133 states have internal predecessors, (3737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:40,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1134 states to 1134 states and 3737 transitions. [2021-06-05 22:14:40,367 INFO L78 Accepts]: Start accepts. Automaton has 1134 states and 3737 transitions. Word has length 24 [2021-06-05 22:14:40,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:40,367 INFO L482 AbstractCegarLoop]: Abstraction has 1134 states and 3737 transitions. [2021-06-05 22:14:40,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:40,367 INFO L276 IsEmpty]: Start isEmpty. Operand 1134 states and 3737 transitions. [2021-06-05 22:14:40,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:14:40,369 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:40,369 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:40,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7506,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:40,569 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:40,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:40,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1814623444, now seen corresponding path program 351 times [2021-06-05 22:14:40,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:40,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948402510] [2021-06-05 22:14:40,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:40,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:40,643 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:40,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:40,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948402510] [2021-06-05 22:14:40,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948402510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:40,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142347371] [2021-06-05 22:14:40,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:40,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:14:40,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:40,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 22:14:40,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:40,962 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_313, v_prenex_312, ends_with_6], 1=[ends_with_10]} [2021-06-05 22:14:40,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:14:40,966 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:41,012 INFO L628 ElimStorePlain]: treesize reduction 94, result has 32.4 percent of original size [2021-06-05 22:14:41,012 INFO L518 ElimStorePlain]: Eliminatee v_prenex_312 vanished before elimination [2021-06-05 22:14:41,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:41,015 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:41,047 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.6 percent of original size [2021-06-05 22:14:41,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:41,050 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:41,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:41,052 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:41,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:14:41,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:14:41,065 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:142, output treesize:16 [2021-06-05 22:14:41,106 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:41,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142347371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:41,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:41,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:14:41,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851546820] [2021-06-05 22:14:41,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:14:41,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:41,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:14:41,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:14:41,107 INFO L87 Difference]: Start difference. First operand 1134 states and 3737 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:41,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:41,354 INFO L93 Difference]: Finished difference Result 1432 states and 4583 transitions. [2021-06-05 22:14:41,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:14:41,354 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:14:41,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:41,356 INFO L225 Difference]: With dead ends: 1432 [2021-06-05 22:14:41,356 INFO L226 Difference]: Without dead ends: 1380 [2021-06-05 22:14:41,356 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 283.8ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:14:41,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1380 states. [2021-06-05 22:14:41,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1380 to 1094. [2021-06-05 22:14:41,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 1093 states have (on average 3.262580054894785) internal successors, (3566), 1093 states have internal predecessors, (3566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:41,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 3566 transitions. [2021-06-05 22:14:41,368 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 3566 transitions. Word has length 24 [2021-06-05 22:14:41,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:41,368 INFO L482 AbstractCegarLoop]: Abstraction has 1094 states and 3566 transitions. [2021-06-05 22:14:41,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:41,368 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 3566 transitions. [2021-06-05 22:14:41,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:14:41,369 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:41,369 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:41,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7601,353 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:41,569 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:41,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:41,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1658558706, now seen corresponding path program 352 times [2021-06-05 22:14:41,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:41,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212875451] [2021-06-05 22:14:41,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:41,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:41,665 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:14:41,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:41,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212875451] [2021-06-05 22:14:41,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212875451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:41,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933696592] [2021-06-05 22:14:41,665 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:41,783 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:14:41,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:41,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 22:14:41,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:41,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:41,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:41,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:41,905 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:41,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:41,909 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:41,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:14:41,912 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:41,985 INFO L628 ElimStorePlain]: treesize reduction 55, result has 54.9 percent of original size [2021-06-05 22:14:41,985 INFO L518 ElimStorePlain]: Eliminatee ends_with_6 vanished before elimination [2021-06-05 22:14:41,988 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 22:14:41,988 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:137, output treesize:59 [2021-06-05 22:14:42,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:42,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:42,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:14:42,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:42,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:14:42,083 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:42,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:14:42,090 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:14:42,090 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:11 [2021-06-05 22:14:42,126 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:42,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933696592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:42,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:42,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:14:42,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909724546] [2021-06-05 22:14:42,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:14:42,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:42,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:14:42,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:14:42,127 INFO L87 Difference]: Start difference. First operand 1094 states and 3566 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:43,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:43,545 INFO L93 Difference]: Finished difference Result 1761 states and 5439 transitions. [2021-06-05 22:14:43,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 22:14:43,545 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:14:43,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:43,547 INFO L225 Difference]: With dead ends: 1761 [2021-06-05 22:14:43,547 INFO L226 Difference]: Without dead ends: 1531 [2021-06-05 22:14:43,547 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1096.9ms TimeCoverageRelationStatistics Valid=225, Invalid=1497, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:14:43,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1531 states. [2021-06-05 22:14:43,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1531 to 1136. [2021-06-05 22:14:43,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1135 states have (on average 3.2731277533039647) internal successors, (3715), 1135 states have internal predecessors, (3715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:43,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 3715 transitions. [2021-06-05 22:14:43,559 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 3715 transitions. Word has length 24 [2021-06-05 22:14:43,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:43,559 INFO L482 AbstractCegarLoop]: Abstraction has 1136 states and 3715 transitions. [2021-06-05 22:14:43,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:43,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 3715 transitions. [2021-06-05 22:14:43,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:14:43,560 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:43,560 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:43,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7627,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:43,761 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:43,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:43,761 INFO L82 PathProgramCache]: Analyzing trace with hash -98423810, now seen corresponding path program 353 times [2021-06-05 22:14:43,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:43,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160854907] [2021-06-05 22:14:43,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:43,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:43,909 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:43,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:43,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160854907] [2021-06-05 22:14:43,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160854907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:43,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583739689] [2021-06-05 22:14:43,910 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:44,030 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:14:44,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:44,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 22:14:44,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:44,300 INFO L446 ElimStorePlain]: Different costs {0=[ends_with_6, v_prenex_316], 1=[ends_with_10]} [2021-06-05 22:14:44,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:14:44,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:44,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:44,307 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:44,310 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:44,310 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:44,313 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:44,313 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:44,364 INFO L628 ElimStorePlain]: treesize reduction 41, result has 55.9 percent of original size [2021-06-05 22:14:44,364 INFO L518 ElimStorePlain]: Eliminatee v_prenex_316 vanished before elimination [2021-06-05 22:14:44,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:44,367 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:44,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:44,370 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:44,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:14:44,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:14:44,391 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:172, output treesize:16 [2021-06-05 22:14:44,433 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:44,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583739689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:44,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:44,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-05 22:14:44,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826199990] [2021-06-05 22:14:44,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:14:44,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:44,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:14:44,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:14:44,434 INFO L87 Difference]: Start difference. First operand 1136 states and 3715 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:44,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:44,892 INFO L93 Difference]: Finished difference Result 1472 states and 4723 transitions. [2021-06-05 22:14:44,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:14:44,892 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:14:44,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:44,894 INFO L225 Difference]: With dead ends: 1472 [2021-06-05 22:14:44,894 INFO L226 Difference]: Without dead ends: 1420 [2021-06-05 22:14:44,894 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 471.2ms TimeCoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:14:44,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1420 states. [2021-06-05 22:14:44,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1420 to 1136. [2021-06-05 22:14:44,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1135 states have (on average 3.2731277533039647) internal successors, (3715), 1135 states have internal predecessors, (3715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:44,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 3715 transitions. [2021-06-05 22:14:44,906 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 3715 transitions. Word has length 24 [2021-06-05 22:14:44,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:44,906 INFO L482 AbstractCegarLoop]: Abstraction has 1136 states and 3715 transitions. [2021-06-05 22:14:44,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:44,906 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 3715 transitions. [2021-06-05 22:14:44,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:14:44,907 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:44,907 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:45,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7646,355 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:45,108 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:45,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:45,108 INFO L82 PathProgramCache]: Analyzing trace with hash -320984176, now seen corresponding path program 354 times [2021-06-05 22:14:45,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:45,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797111347] [2021-06-05 22:14:45,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:45,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:45,259 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:45,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:45,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797111347] [2021-06-05 22:14:45,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797111347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:45,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774420306] [2021-06-05 22:14:45,259 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:45,379 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:14:45,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:45,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 22:14:45,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:45,713 INFO L446 ElimStorePlain]: Different costs {0=[ends_with_6, v_prenex_317, v_prenex_318], 1=[ends_with_10]} [2021-06-05 22:14:45,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:45,718 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:45,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:45,722 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:45,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:45,726 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:45,729 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:45,729 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:45,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:45,734 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:45,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:45,738 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:45,861 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-06-05 22:14:45,862 INFO L628 ElimStorePlain]: treesize reduction 180, result has 39.6 percent of original size [2021-06-05 22:14:45,862 INFO L518 ElimStorePlain]: Eliminatee v_prenex_317 vanished before elimination [2021-06-05 22:14:45,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:14:45,865 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:45,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:14:45,869 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:45,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:14:45,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:45,921 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:45,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:14:45,924 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:45,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:45,935 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:45,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:45,938 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:46,005 INFO L628 ElimStorePlain]: treesize reduction 20, result has 79.4 percent of original size [2021-06-05 22:14:46,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:14:46,007 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:353, output treesize:31 [2021-06-05 22:14:46,084 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:46,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774420306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:46,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:46,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-05 22:14:46,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779252794] [2021-06-05 22:14:46,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:14:46,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:46,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:14:46,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:14:46,085 INFO L87 Difference]: Start difference. First operand 1136 states and 3715 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:46,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:46,661 INFO L93 Difference]: Finished difference Result 1574 states and 5014 transitions. [2021-06-05 22:14:46,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:14:46,662 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:14:46,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:46,664 INFO L225 Difference]: With dead ends: 1574 [2021-06-05 22:14:46,664 INFO L226 Difference]: Without dead ends: 1505 [2021-06-05 22:14:46,664 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 571.3ms TimeCoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:14:46,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1505 states. [2021-06-05 22:14:46,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1505 to 1163. [2021-06-05 22:14:46,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1163 states, 1162 states have (on average 3.2900172117039586) internal successors, (3823), 1162 states have internal predecessors, (3823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:46,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 3823 transitions. [2021-06-05 22:14:46,676 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 3823 transitions. Word has length 24 [2021-06-05 22:14:46,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:46,676 INFO L482 AbstractCegarLoop]: Abstraction has 1163 states and 3823 transitions. [2021-06-05 22:14:46,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:46,676 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 3823 transitions. [2021-06-05 22:14:46,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:14:46,677 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:46,677 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:46,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 356 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7695 [2021-06-05 22:14:46,877 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:46,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:46,878 INFO L82 PathProgramCache]: Analyzing trace with hash 825622932, now seen corresponding path program 355 times [2021-06-05 22:14:46,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:46,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795114821] [2021-06-05 22:14:46,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:46,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:47,044 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:47,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:47,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795114821] [2021-06-05 22:14:47,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795114821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:47,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766437087] [2021-06-05 22:14:47,045 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:47,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:47,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 22:14:47,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:47,509 INFO L446 ElimStorePlain]: Different costs {0=[ends_with_6, v_prenex_319], 1=[ends_with_10]} [2021-06-05 22:14:47,514 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:47,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:47,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:14:47,518 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:47,654 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-06-05 22:14:47,655 INFO L628 ElimStorePlain]: treesize reduction 112, result has 57.4 percent of original size [2021-06-05 22:14:47,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:14:47,658 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:47,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:47,662 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:47,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:14:47,665 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:47,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:47,669 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:47,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:47,672 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:47,768 INFO L628 ElimStorePlain]: treesize reduction 21, result has 84.2 percent of original size [2021-06-05 22:14:47,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:14:47,772 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:47,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:47,775 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:47,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:47,778 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:47,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:47,781 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:47,848 INFO L628 ElimStorePlain]: treesize reduction 20, result has 79.4 percent of original size [2021-06-05 22:14:47,849 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:14:47,850 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:298, output treesize:31 [2021-06-05 22:14:47,927 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:47,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766437087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:47,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:47,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-05 22:14:47,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958729603] [2021-06-05 22:14:47,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:14:47,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:47,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:14:47,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:14:47,928 INFO L87 Difference]: Start difference. First operand 1163 states and 3823 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:48,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:48,453 INFO L93 Difference]: Finished difference Result 1612 states and 5118 transitions. [2021-06-05 22:14:48,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:14:48,454 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:14:48,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:48,456 INFO L225 Difference]: With dead ends: 1612 [2021-06-05 22:14:48,456 INFO L226 Difference]: Without dead ends: 1560 [2021-06-05 22:14:48,456 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 588.3ms TimeCoverageRelationStatistics Valid=157, Invalid=713, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:14:48,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1560 states. [2021-06-05 22:14:48,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1560 to 1137. [2021-06-05 22:14:48,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 1136 states have (on average 3.273767605633803) internal successors, (3719), 1136 states have internal predecessors, (3719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:48,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 3719 transitions. [2021-06-05 22:14:48,468 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 3719 transitions. Word has length 24 [2021-06-05 22:14:48,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:48,468 INFO L482 AbstractCegarLoop]: Abstraction has 1137 states and 3719 transitions. [2021-06-05 22:14:48,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:48,468 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 3719 transitions. [2021-06-05 22:14:48,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:14:48,469 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:48,469 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:48,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7759 [2021-06-05 22:14:48,670 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:48,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:48,670 INFO L82 PathProgramCache]: Analyzing trace with hash 252674682, now seen corresponding path program 356 times [2021-06-05 22:14:48,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:48,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513062104] [2021-06-05 22:14:48,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:48,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:48,756 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:14:48,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:48,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513062104] [2021-06-05 22:14:48,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513062104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:48,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16540264] [2021-06-05 22:14:48,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:48,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:14:48,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:48,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 22:14:48,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:48,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:48,966 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:49,029 INFO L628 ElimStorePlain]: treesize reduction 29, result has 71.8 percent of original size [2021-06-05 22:14:49,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:49,059 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:49,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:14:49,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:14:49,092 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:49,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:14:49,120 INFO L518 ElimStorePlain]: Eliminatee ends_with_6 vanished before elimination [2021-06-05 22:14:49,122 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 22:14:49,122 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:107, output treesize:59 [2021-06-05 22:14:49,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:14:49,182 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:49,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:49,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:14:49,185 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:49,228 INFO L628 ElimStorePlain]: treesize reduction 23, result has 67.6 percent of original size [2021-06-05 22:14:49,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:49,231 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:49,248 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:14:49,249 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:14:49,249 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:99, output treesize:26 [2021-06-05 22:14:49,327 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:14:49,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16540264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:49,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:49,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:14:49,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035355861] [2021-06-05 22:14:49,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:14:49,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:49,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:14:49,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:14:49,328 INFO L87 Difference]: Start difference. First operand 1137 states and 3719 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:50,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:50,578 INFO L93 Difference]: Finished difference Result 1825 states and 5709 transitions. [2021-06-05 22:14:50,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:14:50,578 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:14:50,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:50,580 INFO L225 Difference]: With dead ends: 1825 [2021-06-05 22:14:50,580 INFO L226 Difference]: Without dead ends: 1684 [2021-06-05 22:14:50,580 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 983.1ms TimeCoverageRelationStatistics Valid=214, Invalid=1508, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:14:50,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1684 states. [2021-06-05 22:14:50,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1684 to 1146. [2021-06-05 22:14:50,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1146 states, 1145 states have (on average 3.2995633187772926) internal successors, (3778), 1145 states have internal predecessors, (3778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:50,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1146 states to 1146 states and 3778 transitions. [2021-06-05 22:14:50,593 INFO L78 Accepts]: Start accepts. Automaton has 1146 states and 3778 transitions. Word has length 24 [2021-06-05 22:14:50,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:50,593 INFO L482 AbstractCegarLoop]: Abstraction has 1146 states and 3778 transitions. [2021-06-05 22:14:50,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:50,593 INFO L276 IsEmpty]: Start isEmpty. Operand 1146 states and 3778 transitions. [2021-06-05 22:14:50,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:14:50,595 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:50,595 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:50,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 358 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7829 [2021-06-05 22:14:50,795 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:50,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:50,795 INFO L82 PathProgramCache]: Analyzing trace with hash -591717378, now seen corresponding path program 357 times [2021-06-05 22:14:50,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:50,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302500665] [2021-06-05 22:14:50,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:50,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:50,882 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:14:50,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:50,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302500665] [2021-06-05 22:14:50,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302500665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:50,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184508112] [2021-06-05 22:14:50,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:51,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:14:51,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:51,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 22:14:51,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:51,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:14:51,129 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:51,215 INFO L628 ElimStorePlain]: treesize reduction 58, result has 64.2 percent of original size [2021-06-05 22:14:51,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:14:51,219 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:51,296 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.0 percent of original size [2021-06-05 22:14:51,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:51,299 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:51,358 INFO L628 ElimStorePlain]: treesize reduction 22, result has 76.3 percent of original size [2021-06-05 22:14:51,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:51,361 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:51,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:14:51,391 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 22:14:51,391 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:165, output treesize:59 [2021-06-05 22:14:51,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:14:51,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:51,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:51,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:14:51,461 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:51,507 INFO L628 ElimStorePlain]: treesize reduction 40, result has 54.0 percent of original size [2021-06-05 22:14:51,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:14:51,510 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:51,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:14:51,528 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:14:51,528 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:99, output treesize:26 [2021-06-05 22:14:51,604 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:51,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184508112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:51,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:51,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 22:14:51,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98893595] [2021-06-05 22:14:51,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:14:51,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:51,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:14:51,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:14:51,605 INFO L87 Difference]: Start difference. First operand 1146 states and 3778 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:52,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:52,990 INFO L93 Difference]: Finished difference Result 1665 states and 5212 transitions. [2021-06-05 22:14:52,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 22:14:52,990 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:14:52,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:52,992 INFO L225 Difference]: With dead ends: 1665 [2021-06-05 22:14:52,992 INFO L226 Difference]: Without dead ends: 1518 [2021-06-05 22:14:52,992 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1107.3ms TimeCoverageRelationStatistics Valid=272, Invalid=1708, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 22:14:52,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1518 states. [2021-06-05 22:14:53,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1518 to 1069. [2021-06-05 22:14:53,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 1068 states have (on average 3.25) internal successors, (3471), 1068 states have internal predecessors, (3471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:53,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 3471 transitions. [2021-06-05 22:14:53,003 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 3471 transitions. Word has length 24 [2021-06-05 22:14:53,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:53,003 INFO L482 AbstractCegarLoop]: Abstraction has 1069 states and 3471 transitions. [2021-06-05 22:14:53,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:53,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 3471 transitions. [2021-06-05 22:14:53,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:14:53,004 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:53,004 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:53,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7847 [2021-06-05 22:14:53,205 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:53,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:53,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1468889190, now seen corresponding path program 358 times [2021-06-05 22:14:53,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:53,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486822799] [2021-06-05 22:14:53,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:53,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:53,297 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:53,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:53,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486822799] [2021-06-05 22:14:53,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486822799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:53,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476470190] [2021-06-05 22:14:53,298 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:53,418 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:14:53,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:53,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 22:14:53,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:53,650 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:53,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476470190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:53,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:53,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 22:14:53,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705923958] [2021-06-05 22:14:53,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:14:53,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:53,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:14:53,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:14:53,651 INFO L87 Difference]: Start difference. First operand 1069 states and 3471 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:56,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:56,586 INFO L93 Difference]: Finished difference Result 2034 states and 6206 transitions. [2021-06-05 22:14:56,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-06-05 22:14:56,586 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:14:56,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:56,589 INFO L225 Difference]: With dead ends: 2034 [2021-06-05 22:14:56,589 INFO L226 Difference]: Without dead ends: 1956 [2021-06-05 22:14:56,590 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3037 ImplicationChecksByTransitivity, 1828.6ms TimeCoverageRelationStatistics Valid=782, Invalid=8148, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 22:14:56,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1956 states. [2021-06-05 22:14:56,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1956 to 1101. [2021-06-05 22:14:56,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 1100 states have (on average 3.2636363636363637) internal successors, (3590), 1100 states have internal predecessors, (3590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:56,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 3590 transitions. [2021-06-05 22:14:56,604 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 3590 transitions. Word has length 25 [2021-06-05 22:14:56,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:56,604 INFO L482 AbstractCegarLoop]: Abstraction has 1101 states and 3590 transitions. [2021-06-05 22:14:56,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:56,604 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 3590 transitions. [2021-06-05 22:14:56,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:14:56,605 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:56,605 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:56,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7875,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:56,806 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:56,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:56,806 INFO L82 PathProgramCache]: Analyzing trace with hash 195955482, now seen corresponding path program 359 times [2021-06-05 22:14:56,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:56,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889659930] [2021-06-05 22:14:56,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:56,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:56,905 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:56,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:56,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889659930] [2021-06-05 22:14:56,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889659930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:56,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711281618] [2021-06-05 22:14:56,905 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:57,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:14:57,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:57,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 22:14:57,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:57,482 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:57,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711281618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:57,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:57,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 22:14:57,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459501817] [2021-06-05 22:14:57,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:14:57,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:57,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:14:57,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:14:57,482 INFO L87 Difference]: Start difference. First operand 1101 states and 3590 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:59,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:59,898 INFO L93 Difference]: Finished difference Result 1986 states and 6129 transitions. [2021-06-05 22:14:59,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 22:14:59,898 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:14:59,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:59,900 INFO L225 Difference]: With dead ends: 1986 [2021-06-05 22:14:59,900 INFO L226 Difference]: Without dead ends: 1908 [2021-06-05 22:14:59,901 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1719 ImplicationChecksByTransitivity, 1184.5ms TimeCoverageRelationStatistics Valid=457, Invalid=4945, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 22:14:59,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1908 states. [2021-06-05 22:14:59,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1908 to 1096. [2021-06-05 22:14:59,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1096 states, 1095 states have (on average 3.2831050228310503) internal successors, (3595), 1095 states have internal predecessors, (3595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:59,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 3595 transitions. [2021-06-05 22:14:59,915 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 3595 transitions. Word has length 25 [2021-06-05 22:14:59,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:59,915 INFO L482 AbstractCegarLoop]: Abstraction has 1096 states and 3595 transitions. [2021-06-05 22:14:59,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:59,915 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 3595 transitions. [2021-06-05 22:14:59,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:14:59,916 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:59,916 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:00,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7884 [2021-06-05 22:15:00,117 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:00,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:00,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1381037462, now seen corresponding path program 360 times [2021-06-05 22:15:00,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:00,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066097117] [2021-06-05 22:15:00,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:00,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:00,205 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:00,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:00,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066097117] [2021-06-05 22:15:00,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066097117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:00,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265336653] [2021-06-05 22:15:00,205 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:00,327 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:15:00,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:00,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 22:15:00,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:00,673 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:00,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265336653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:00,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:00,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 22:15:00,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765680399] [2021-06-05 22:15:00,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:15:00,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:00,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:15:00,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:15:00,674 INFO L87 Difference]: Start difference. First operand 1096 states and 3595 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:02,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:02,697 INFO L93 Difference]: Finished difference Result 2064 states and 6370 transitions. [2021-06-05 22:15:02,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 22:15:02,697 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:15:02,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:02,700 INFO L225 Difference]: With dead ends: 2064 [2021-06-05 22:15:02,700 INFO L226 Difference]: Without dead ends: 2012 [2021-06-05 22:15:02,701 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1866 ImplicationChecksByTransitivity, 1189.0ms TimeCoverageRelationStatistics Valid=593, Invalid=5259, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 22:15:02,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2012 states. [2021-06-05 22:15:02,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2012 to 1064. [2021-06-05 22:15:02,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1064 states, 1063 states have (on average 3.3029162746942617) internal successors, (3511), 1063 states have internal predecessors, (3511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:02,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 3511 transitions. [2021-06-05 22:15:02,716 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 3511 transitions. Word has length 25 [2021-06-05 22:15:02,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:02,716 INFO L482 AbstractCegarLoop]: Abstraction has 1064 states and 3511 transitions. [2021-06-05 22:15:02,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:02,716 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 3511 transitions. [2021-06-05 22:15:02,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:15:02,717 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:02,717 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:02,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 362 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7982 [2021-06-05 22:15:02,918 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:02,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:02,918 INFO L82 PathProgramCache]: Analyzing trace with hash 496440448, now seen corresponding path program 361 times [2021-06-05 22:15:02,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:02,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607166649] [2021-06-05 22:15:02,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:02,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:03,004 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:03,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:03,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607166649] [2021-06-05 22:15:03,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607166649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:03,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361988593] [2021-06-05 22:15:03,005 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:03,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:03,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 22:15:03,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:03,357 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:03,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361988593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:03,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:03,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 22:15:03,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733063975] [2021-06-05 22:15:03,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:15:03,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:03,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:15:03,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:15:03,357 INFO L87 Difference]: Start difference. First operand 1064 states and 3511 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:04,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:04,765 INFO L93 Difference]: Finished difference Result 1617 states and 5059 transitions. [2021-06-05 22:15:04,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 22:15:04,766 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:15:04,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:04,767 INFO L225 Difference]: With dead ends: 1617 [2021-06-05 22:15:04,767 INFO L226 Difference]: Without dead ends: 1468 [2021-06-05 22:15:04,768 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1153 ImplicationChecksByTransitivity, 813.4ms TimeCoverageRelationStatistics Valid=331, Invalid=3451, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 22:15:04,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1468 states. [2021-06-05 22:15:04,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1468 to 1074. [2021-06-05 22:15:04,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 1073 states have (on average 3.302889095992544) internal successors, (3544), 1073 states have internal predecessors, (3544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:04,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 3544 transitions. [2021-06-05 22:15:04,779 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 3544 transitions. Word has length 25 [2021-06-05 22:15:04,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:04,779 INFO L482 AbstractCegarLoop]: Abstraction has 1074 states and 3544 transitions. [2021-06-05 22:15:04,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:04,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 3544 transitions. [2021-06-05 22:15:04,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:15:04,780 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:04,780 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:04,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8017 [2021-06-05 22:15:04,981 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:04,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:04,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1193889788, now seen corresponding path program 362 times [2021-06-05 22:15:04,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:04,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997334172] [2021-06-05 22:15:04,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:04,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:05,073 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:05,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:05,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997334172] [2021-06-05 22:15:05,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997334172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:05,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638824401] [2021-06-05 22:15:05,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:05,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:15:05,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:05,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 22:15:05,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:05,442 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:05,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638824401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:05,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:05,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 22:15:05,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849099968] [2021-06-05 22:15:05,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:15:05,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:05,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:15:05,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:15:05,443 INFO L87 Difference]: Start difference. First operand 1074 states and 3544 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:07,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:07,071 INFO L93 Difference]: Finished difference Result 1700 states and 5327 transitions. [2021-06-05 22:15:07,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 22:15:07,071 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:15:07,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:07,073 INFO L225 Difference]: With dead ends: 1700 [2021-06-05 22:15:07,073 INFO L226 Difference]: Without dead ends: 1579 [2021-06-05 22:15:07,073 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1506 ImplicationChecksByTransitivity, 1119.0ms TimeCoverageRelationStatistics Valid=409, Invalid=4283, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 22:15:07,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2021-06-05 22:15:07,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 1087. [2021-06-05 22:15:07,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 1086 states have (on average 3.303867403314917) internal successors, (3588), 1086 states have internal predecessors, (3588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:07,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 3588 transitions. [2021-06-05 22:15:07,085 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 3588 transitions. Word has length 25 [2021-06-05 22:15:07,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:07,086 INFO L482 AbstractCegarLoop]: Abstraction has 1087 states and 3588 transitions. [2021-06-05 22:15:07,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:07,086 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 3588 transitions. [2021-06-05 22:15:07,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:15:07,087 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:07,087 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:07,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8029 [2021-06-05 22:15:07,287 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:07,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:07,288 INFO L82 PathProgramCache]: Analyzing trace with hash -723274496, now seen corresponding path program 363 times [2021-06-05 22:15:07,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:07,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359133899] [2021-06-05 22:15:07,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:07,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:07,384 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:07,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:07,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359133899] [2021-06-05 22:15:07,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359133899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:07,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34827423] [2021-06-05 22:15:07,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:07,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:15:07,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:07,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 22:15:07,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:07,758 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:07,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34827423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:07,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:07,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 22:15:07,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575403287] [2021-06-05 22:15:07,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:15:07,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:07,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:15:07,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:15:07,759 INFO L87 Difference]: Start difference. First operand 1087 states and 3588 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:09,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:09,909 INFO L93 Difference]: Finished difference Result 1756 states and 5467 transitions. [2021-06-05 22:15:09,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 22:15:09,909 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:15:09,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:09,912 INFO L225 Difference]: With dead ends: 1756 [2021-06-05 22:15:09,912 INFO L226 Difference]: Without dead ends: 1678 [2021-06-05 22:15:09,912 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1879 ImplicationChecksByTransitivity, 1566.1ms TimeCoverageRelationStatistics Valid=641, Invalid=5365, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 22:15:09,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1678 states. [2021-06-05 22:15:09,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1678 to 1088. [2021-06-05 22:15:09,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1088 states, 1087 states have (on average 3.3045078196872124) internal successors, (3592), 1087 states have internal predecessors, (3592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:09,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1088 states to 1088 states and 3592 transitions. [2021-06-05 22:15:09,925 INFO L78 Accepts]: Start accepts. Automaton has 1088 states and 3592 transitions. Word has length 25 [2021-06-05 22:15:09,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:09,925 INFO L482 AbstractCegarLoop]: Abstraction has 1088 states and 3592 transitions. [2021-06-05 22:15:09,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:09,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1088 states and 3592 transitions. [2021-06-05 22:15:09,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:15:09,926 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:09,926 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:10,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 365 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8047 [2021-06-05 22:15:10,126 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:10,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:10,126 INFO L82 PathProgramCache]: Analyzing trace with hash 461807484, now seen corresponding path program 364 times [2021-06-05 22:15:10,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:10,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837684492] [2021-06-05 22:15:10,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:10,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:10,224 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:10,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:10,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837684492] [2021-06-05 22:15:10,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837684492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:10,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100541616] [2021-06-05 22:15:10,224 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:10,346 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:15:10,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:10,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 22:15:10,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:10,599 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:10,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100541616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:10,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:10,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 22:15:10,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160346368] [2021-06-05 22:15:10,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:15:10,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:10,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:15:10,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:15:10,599 INFO L87 Difference]: Start difference. First operand 1088 states and 3592 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:12,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:12,046 INFO L93 Difference]: Finished difference Result 1606 states and 5071 transitions. [2021-06-05 22:15:12,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 22:15:12,047 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:15:12,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:12,049 INFO L225 Difference]: With dead ends: 1606 [2021-06-05 22:15:12,049 INFO L226 Difference]: Without dead ends: 1554 [2021-06-05 22:15:12,049 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1116 ImplicationChecksByTransitivity, 975.1ms TimeCoverageRelationStatistics Valid=500, Invalid=3406, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 22:15:12,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1554 states. [2021-06-05 22:15:12,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1554 to 1064. [2021-06-05 22:15:12,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1064 states, 1063 states have (on average 3.303857008466604) internal successors, (3512), 1063 states have internal predecessors, (3512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:12,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 3512 transitions. [2021-06-05 22:15:12,062 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 3512 transitions. Word has length 25 [2021-06-05 22:15:12,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:12,062 INFO L482 AbstractCegarLoop]: Abstraction has 1064 states and 3512 transitions. [2021-06-05 22:15:12,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:12,063 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 3512 transitions. [2021-06-05 22:15:12,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:15:12,064 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:12,064 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:12,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8060,366 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:12,287 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:12,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:12,287 INFO L82 PathProgramCache]: Analyzing trace with hash 387650504, now seen corresponding path program 365 times [2021-06-05 22:15:12,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:12,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247623887] [2021-06-05 22:15:12,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:12,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:12,376 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:12,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:12,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247623887] [2021-06-05 22:15:12,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247623887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:12,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808216808] [2021-06-05 22:15:12,376 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:12,501 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:15:12,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:12,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 22:15:12,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:12,730 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:12,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808216808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:12,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:12,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 22:15:12,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917440221] [2021-06-05 22:15:12,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:15:12,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:12,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:15:12,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:15:12,731 INFO L87 Difference]: Start difference. First operand 1064 states and 3512 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:14,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:14,199 INFO L93 Difference]: Finished difference Result 1593 states and 4983 transitions. [2021-06-05 22:15:14,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 22:15:14,199 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:15:14,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:14,201 INFO L225 Difference]: With dead ends: 1593 [2021-06-05 22:15:14,201 INFO L226 Difference]: Without dead ends: 1472 [2021-06-05 22:15:14,201 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1221 ImplicationChecksByTransitivity, 899.5ms TimeCoverageRelationStatistics Valid=354, Invalid=3552, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 22:15:14,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1472 states. [2021-06-05 22:15:14,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1472 to 1064. [2021-06-05 22:15:14,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1064 states, 1063 states have (on average 3.2925682031984946) internal successors, (3500), 1063 states have internal predecessors, (3500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:14,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 3500 transitions. [2021-06-05 22:15:14,213 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 3500 transitions. Word has length 25 [2021-06-05 22:15:14,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:14,213 INFO L482 AbstractCegarLoop]: Abstraction has 1064 states and 3500 transitions. [2021-06-05 22:15:14,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:14,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 3500 transitions. [2021-06-05 22:15:14,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:15:14,214 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:14,214 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:14,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8079,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:14,417 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:14,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:14,417 INFO L82 PathProgramCache]: Analyzing trace with hash -344431800, now seen corresponding path program 366 times [2021-06-05 22:15:14,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:14,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319827630] [2021-06-05 22:15:14,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:14,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:14,522 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:14,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:14,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319827630] [2021-06-05 22:15:14,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319827630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:14,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600680145] [2021-06-05 22:15:14,523 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:14,672 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:15:14,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:14,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 22:15:14,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:14,941 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:14,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600680145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:14,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:14,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 22:15:14,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470517060] [2021-06-05 22:15:14,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:15:14,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:14,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:15:14,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:15:14,943 INFO L87 Difference]: Start difference. First operand 1064 states and 3500 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:16,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:16,312 INFO L93 Difference]: Finished difference Result 1555 states and 4863 transitions. [2021-06-05 22:15:16,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 22:15:16,312 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:15:16,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:16,314 INFO L225 Difference]: With dead ends: 1555 [2021-06-05 22:15:16,314 INFO L226 Difference]: Without dead ends: 1503 [2021-06-05 22:15:16,315 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1219 ImplicationChecksByTransitivity, 1039.1ms TimeCoverageRelationStatistics Valid=496, Invalid=3536, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 22:15:16,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1503 states. [2021-06-05 22:15:16,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1503 to 1025. [2021-06-05 22:15:16,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1025 states, 1024 states have (on average 3.265625) internal successors, (3344), 1024 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:16,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1025 states to 1025 states and 3344 transitions. [2021-06-05 22:15:16,326 INFO L78 Accepts]: Start accepts. Automaton has 1025 states and 3344 transitions. Word has length 25 [2021-06-05 22:15:16,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:16,327 INFO L482 AbstractCegarLoop]: Abstraction has 1025 states and 3344 transitions. [2021-06-05 22:15:16,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:16,327 INFO L276 IsEmpty]: Start isEmpty. Operand 1025 states and 3344 transitions. [2021-06-05 22:15:16,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:15:16,328 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:16,328 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:16,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8092,368 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:16,529 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:16,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:16,530 INFO L82 PathProgramCache]: Analyzing trace with hash 142687432, now seen corresponding path program 367 times [2021-06-05 22:15:16,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:16,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990212550] [2021-06-05 22:15:16,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:16,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:16,613 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:16,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:16,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990212550] [2021-06-05 22:15:16,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990212550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:16,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447212757] [2021-06-05 22:15:16,613 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:16,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:16,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 22:15:16,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:16,985 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:16,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447212757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:16,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:16,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 22:15:16,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332930408] [2021-06-05 22:15:16,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:15:16,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:16,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:15:16,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:15:16,990 INFO L87 Difference]: Start difference. First operand 1025 states and 3344 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:18,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:18,545 INFO L93 Difference]: Finished difference Result 1634 states and 5077 transitions. [2021-06-05 22:15:18,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 22:15:18,546 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:15:18,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:18,549 INFO L225 Difference]: With dead ends: 1634 [2021-06-05 22:15:18,549 INFO L226 Difference]: Without dead ends: 1582 [2021-06-05 22:15:18,550 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1446 ImplicationChecksByTransitivity, 924.2ms TimeCoverageRelationStatistics Valid=488, Invalid=4068, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 22:15:18,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1582 states. [2021-06-05 22:15:18,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1582 to 928. [2021-06-05 22:15:18,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 927 states have (on average 3.236245954692557) internal successors, (3000), 927 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:18,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 3000 transitions. [2021-06-05 22:15:18,564 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 3000 transitions. Word has length 25 [2021-06-05 22:15:18,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:18,564 INFO L482 AbstractCegarLoop]: Abstraction has 928 states and 3000 transitions. [2021-06-05 22:15:18,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:18,564 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 3000 transitions. [2021-06-05 22:15:18,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:15:18,565 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:18,565 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:18,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8109,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:18,765 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:18,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:18,766 INFO L82 PathProgramCache]: Analyzing trace with hash -720949964, now seen corresponding path program 368 times [2021-06-05 22:15:18,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:18,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801547402] [2021-06-05 22:15:18,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:18,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:18,852 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:18,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:18,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801547402] [2021-06-05 22:15:18,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801547402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:18,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983708140] [2021-06-05 22:15:18,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:18,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:15:18,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:18,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 22:15:18,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:19,218 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:19,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983708140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:19,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:19,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 22:15:19,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666747601] [2021-06-05 22:15:19,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:15:19,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:19,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:15:19,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:15:19,219 INFO L87 Difference]: Start difference. First operand 928 states and 3000 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:20,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:20,689 INFO L93 Difference]: Finished difference Result 1353 states and 4151 transitions. [2021-06-05 22:15:20,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 22:15:20,690 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:15:20,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:20,691 INFO L225 Difference]: With dead ends: 1353 [2021-06-05 22:15:20,691 INFO L226 Difference]: Without dead ends: 1204 [2021-06-05 22:15:20,692 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 746.3ms TimeCoverageRelationStatistics Valid=344, Invalid=2962, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 22:15:20,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2021-06-05 22:15:20,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 934. [2021-06-05 22:15:20,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 933 states have (on average 3.2293676312968915) internal successors, (3013), 933 states have internal predecessors, (3013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:20,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 3013 transitions. [2021-06-05 22:15:20,702 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 3013 transitions. Word has length 25 [2021-06-05 22:15:20,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:20,702 INFO L482 AbstractCegarLoop]: Abstraction has 934 states and 3013 transitions. [2021-06-05 22:15:20,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:20,702 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 3013 transitions. [2021-06-05 22:15:20,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:15:20,703 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:20,703 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:20,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 370 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8115 [2021-06-05 22:15:20,903 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:20,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:20,903 INFO L82 PathProgramCache]: Analyzing trace with hash -23500624, now seen corresponding path program 369 times [2021-06-05 22:15:20,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:20,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235310756] [2021-06-05 22:15:20,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:20,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:21,006 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:21,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:21,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235310756] [2021-06-05 22:15:21,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235310756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:21,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136923202] [2021-06-05 22:15:21,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:21,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:15:21,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:21,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 22:15:21,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:21,367 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:21,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136923202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:21,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:21,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 22:15:21,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17999443] [2021-06-05 22:15:21,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:15:21,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:21,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:15:21,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:15:21,368 INFO L87 Difference]: Start difference. First operand 934 states and 3013 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:22,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:22,694 INFO L93 Difference]: Finished difference Result 1438 states and 4422 transitions. [2021-06-05 22:15:22,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 22:15:22,695 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:15:22,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:22,696 INFO L225 Difference]: With dead ends: 1438 [2021-06-05 22:15:22,696 INFO L226 Difference]: Without dead ends: 1317 [2021-06-05 22:15:22,697 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1073 ImplicationChecksByTransitivity, 1024.8ms TimeCoverageRelationStatistics Valid=363, Invalid=3177, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 22:15:22,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1317 states. [2021-06-05 22:15:22,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1317 to 945. [2021-06-05 22:15:22,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 945 states, 944 states have (on average 3.2288135593220337) internal successors, (3048), 944 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:22,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 3048 transitions. [2021-06-05 22:15:22,707 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 3048 transitions. Word has length 25 [2021-06-05 22:15:22,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:22,707 INFO L482 AbstractCegarLoop]: Abstraction has 945 states and 3048 transitions. [2021-06-05 22:15:22,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:22,707 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 3048 transitions. [2021-06-05 22:15:22,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:15:22,708 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:22,708 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:22,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8131 [2021-06-05 22:15:22,909 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:22,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:22,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1940664908, now seen corresponding path program 370 times [2021-06-05 22:15:22,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:22,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417549409] [2021-06-05 22:15:22,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:22,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:23,006 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:23,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:23,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417549409] [2021-06-05 22:15:23,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417549409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:23,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433371774] [2021-06-05 22:15:23,007 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:23,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:15:23,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:23,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 22:15:23,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:23,381 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:23,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433371774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:23,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:23,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 22:15:23,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229374240] [2021-06-05 22:15:23,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:15:23,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:23,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:15:23,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:15:23,382 INFO L87 Difference]: Start difference. First operand 945 states and 3048 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:25,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:25,348 INFO L93 Difference]: Finished difference Result 1649 states and 5064 transitions. [2021-06-05 22:15:25,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 22:15:25,348 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:15:25,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:25,350 INFO L225 Difference]: With dead ends: 1649 [2021-06-05 22:15:25,350 INFO L226 Difference]: Without dead ends: 1571 [2021-06-05 22:15:25,350 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1989 ImplicationChecksByTransitivity, 1571.3ms TimeCoverageRelationStatistics Valid=658, Invalid=5348, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 22:15:25,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1571 states. [2021-06-05 22:15:25,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1571 to 988. [2021-06-05 22:15:25,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 988 states, 987 states have (on average 3.243161094224924) internal successors, (3201), 987 states have internal predecessors, (3201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:25,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 988 states to 988 states and 3201 transitions. [2021-06-05 22:15:25,361 INFO L78 Accepts]: Start accepts. Automaton has 988 states and 3201 transitions. Word has length 25 [2021-06-05 22:15:25,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:25,362 INFO L482 AbstractCegarLoop]: Abstraction has 988 states and 3201 transitions. [2021-06-05 22:15:25,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:25,362 INFO L276 IsEmpty]: Start isEmpty. Operand 988 states and 3201 transitions. [2021-06-05 22:15:25,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:15:25,363 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:25,363 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:25,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8139,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:25,563 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:25,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:25,563 INFO L82 PathProgramCache]: Analyzing trace with hash -755582928, now seen corresponding path program 371 times [2021-06-05 22:15:25,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:25,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579636553] [2021-06-05 22:15:25,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:25,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:25,675 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:25,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:25,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579636553] [2021-06-05 22:15:25,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579636553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:25,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113488746] [2021-06-05 22:15:25,675 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:25,800 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:15:25,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:25,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 22:15:25,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:26,049 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:26,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113488746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:26,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:26,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 22:15:26,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578196291] [2021-06-05 22:15:26,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:15:26,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:26,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:15:26,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:15:26,050 INFO L87 Difference]: Start difference. First operand 988 states and 3201 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:27,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:27,400 INFO L93 Difference]: Finished difference Result 1507 states and 4689 transitions. [2021-06-05 22:15:27,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 22:15:27,400 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:15:27,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:27,402 INFO L225 Difference]: With dead ends: 1507 [2021-06-05 22:15:27,402 INFO L226 Difference]: Without dead ends: 1455 [2021-06-05 22:15:27,403 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1437 ImplicationChecksByTransitivity, 1039.4ms TimeCoverageRelationStatistics Valid=559, Invalid=3997, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 22:15:27,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1455 states. [2021-06-05 22:15:27,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1455 to 920. [2021-06-05 22:15:27,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 919 states have (on average 3.2241566920565834) internal successors, (2963), 919 states have internal predecessors, (2963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:27,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 2963 transitions. [2021-06-05 22:15:27,413 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 2963 transitions. Word has length 25 [2021-06-05 22:15:27,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:27,414 INFO L482 AbstractCegarLoop]: Abstraction has 920 states and 2963 transitions. [2021-06-05 22:15:27,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:27,414 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 2963 transitions. [2021-06-05 22:15:27,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:15:27,415 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:27,415 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:27,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8152 [2021-06-05 22:15:27,615 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:27,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:27,615 INFO L82 PathProgramCache]: Analyzing trace with hash -829739908, now seen corresponding path program 372 times [2021-06-05 22:15:27,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:27,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122378009] [2021-06-05 22:15:27,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:27,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:27,700 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:27,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:27,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122378009] [2021-06-05 22:15:27,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122378009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:27,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031506347] [2021-06-05 22:15:27,700 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:27,827 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:15:27,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:27,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 22:15:27,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:28,065 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:28,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031506347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:28,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:28,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 22:15:28,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600707830] [2021-06-05 22:15:28,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:15:28,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:28,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:15:28,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:15:28,065 INFO L87 Difference]: Start difference. First operand 920 states and 2963 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:29,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:29,436 INFO L93 Difference]: Finished difference Result 1457 states and 4481 transitions. [2021-06-05 22:15:29,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 22:15:29,436 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:15:29,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:29,438 INFO L225 Difference]: With dead ends: 1457 [2021-06-05 22:15:29,438 INFO L226 Difference]: Without dead ends: 1336 [2021-06-05 22:15:29,438 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1040 ImplicationChecksByTransitivity, 834.6ms TimeCoverageRelationStatistics Valid=349, Invalid=3073, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 22:15:29,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1336 states. [2021-06-05 22:15:29,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1336 to 947. [2021-06-05 22:15:29,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 946 states have (on average 3.2283298097251585) internal successors, (3054), 946 states have internal predecessors, (3054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:29,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 3054 transitions. [2021-06-05 22:15:29,448 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 3054 transitions. Word has length 25 [2021-06-05 22:15:29,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:29,448 INFO L482 AbstractCegarLoop]: Abstraction has 947 states and 3054 transitions. [2021-06-05 22:15:29,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:29,449 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 3054 transitions. [2021-06-05 22:15:29,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:15:29,449 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:29,449 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:29,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8169 [2021-06-05 22:15:29,650 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:29,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:29,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1548063104, now seen corresponding path program 373 times [2021-06-05 22:15:29,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:29,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490492500] [2021-06-05 22:15:29,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:29,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:29,743 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:29,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:29,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490492500] [2021-06-05 22:15:29,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490492500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:29,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942764792] [2021-06-05 22:15:29,743 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:29,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:29,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 22:15:29,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:30,092 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:30,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942764792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:30,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:30,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 22:15:30,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826086325] [2021-06-05 22:15:30,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:15:30,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:30,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:15:30,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:15:30,093 INFO L87 Difference]: Start difference. First operand 947 states and 3054 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:32,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:32,083 INFO L93 Difference]: Finished difference Result 1637 states and 5024 transitions. [2021-06-05 22:15:32,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 22:15:32,083 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:15:32,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:32,085 INFO L225 Difference]: With dead ends: 1637 [2021-06-05 22:15:32,085 INFO L226 Difference]: Without dead ends: 1559 [2021-06-05 22:15:32,085 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2064 ImplicationChecksByTransitivity, 1547.4ms TimeCoverageRelationStatistics Valid=674, Invalid=5488, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 22:15:32,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1559 states. [2021-06-05 22:15:32,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1559 to 991. [2021-06-05 22:15:32,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 990 states have (on average 3.2444444444444445) internal successors, (3212), 990 states have internal predecessors, (3212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:32,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 3212 transitions. [2021-06-05 22:15:32,099 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 3212 transitions. Word has length 25 [2021-06-05 22:15:32,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:32,099 INFO L482 AbstractCegarLoop]: Abstraction has 991 states and 3212 transitions. [2021-06-05 22:15:32,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:32,099 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 3212 transitions. [2021-06-05 22:15:32,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:15:32,100 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:32,100 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:32,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8186,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:32,301 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:32,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:32,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1561822212, now seen corresponding path program 374 times [2021-06-05 22:15:32,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:32,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375895870] [2021-06-05 22:15:32,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:32,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:32,391 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:32,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:32,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375895870] [2021-06-05 22:15:32,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375895870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:32,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809976292] [2021-06-05 22:15:32,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:32,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:15:32,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:32,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 22:15:32,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:32,756 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:32,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809976292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:32,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:32,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 22:15:32,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869363885] [2021-06-05 22:15:32,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:15:32,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:32,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:15:32,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:15:32,757 INFO L87 Difference]: Start difference. First operand 991 states and 3212 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:34,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:34,104 INFO L93 Difference]: Finished difference Result 1495 states and 4649 transitions. [2021-06-05 22:15:34,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 22:15:34,104 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:15:34,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:34,106 INFO L225 Difference]: With dead ends: 1495 [2021-06-05 22:15:34,106 INFO L226 Difference]: Without dead ends: 1443 [2021-06-05 22:15:34,106 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 999.9ms TimeCoverageRelationStatistics Valid=565, Invalid=4127, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 22:15:34,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1443 states. [2021-06-05 22:15:34,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1443 to 935. [2021-06-05 22:15:34,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 935 states, 934 states have (on average 3.226980728051392) internal successors, (3014), 934 states have internal predecessors, (3014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:34,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 935 states to 935 states and 3014 transitions. [2021-06-05 22:15:34,118 INFO L78 Accepts]: Start accepts. Automaton has 935 states and 3014 transitions. Word has length 25 [2021-06-05 22:15:34,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:34,118 INFO L482 AbstractCegarLoop]: Abstraction has 935 states and 3014 transitions. [2021-06-05 22:15:34,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:34,118 INFO L276 IsEmpty]: Start isEmpty. Operand 935 states and 3014 transitions. [2021-06-05 22:15:34,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:15:34,119 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:34,119 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:34,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8195 [2021-06-05 22:15:34,319 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:34,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:34,319 INFO L82 PathProgramCache]: Analyzing trace with hash 275129396, now seen corresponding path program 375 times [2021-06-05 22:15:34,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:34,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638338429] [2021-06-05 22:15:34,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:34,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:34,418 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:34,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:34,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638338429] [2021-06-05 22:15:34,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638338429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:34,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555225649] [2021-06-05 22:15:34,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:34,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:15:34,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:34,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 22:15:34,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:34,841 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:34,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555225649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:34,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:34,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 22:15:34,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069643849] [2021-06-05 22:15:34,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:15:34,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:34,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:15:34,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:15:34,842 INFO L87 Difference]: Start difference. First operand 935 states and 3014 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:36,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:36,349 INFO L93 Difference]: Finished difference Result 1836 states and 5621 transitions. [2021-06-05 22:15:36,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 22:15:36,349 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:15:36,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:36,351 INFO L225 Difference]: With dead ends: 1836 [2021-06-05 22:15:36,351 INFO L226 Difference]: Without dead ends: 1758 [2021-06-05 22:15:36,352 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1388 ImplicationChecksByTransitivity, 1001.0ms TimeCoverageRelationStatistics Valid=441, Invalid=3849, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 22:15:36,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1758 states. [2021-06-05 22:15:36,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1758 to 1005. [2021-06-05 22:15:36,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1005 states, 1004 states have (on average 3.25796812749004) internal successors, (3271), 1004 states have internal predecessors, (3271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:36,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 3271 transitions. [2021-06-05 22:15:36,364 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 3271 transitions. Word has length 25 [2021-06-05 22:15:36,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:36,365 INFO L482 AbstractCegarLoop]: Abstraction has 1005 states and 3271 transitions. [2021-06-05 22:15:36,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:36,365 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 3271 transitions. [2021-06-05 22:15:36,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:15:36,366 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:36,366 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:36,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 377 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8214 [2021-06-05 22:15:36,566 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:36,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:36,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1460211376, now seen corresponding path program 376 times [2021-06-05 22:15:36,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:36,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051785235] [2021-06-05 22:15:36,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:36,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:36,657 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:36,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:36,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051785235] [2021-06-05 22:15:36,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051785235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:36,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582962663] [2021-06-05 22:15:36,657 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:36,781 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:15:36,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:36,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 22:15:36,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:37,140 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:37,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582962663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:37,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:37,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 22:15:37,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54973882] [2021-06-05 22:15:37,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:15:37,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:37,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:15:37,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:15:37,141 INFO L87 Difference]: Start difference. First operand 1005 states and 3271 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:38,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:38,457 INFO L93 Difference]: Finished difference Result 1911 states and 5874 transitions. [2021-06-05 22:15:38,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 22:15:38,458 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:15:38,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:38,460 INFO L225 Difference]: With dead ends: 1911 [2021-06-05 22:15:38,460 INFO L226 Difference]: Without dead ends: 1859 [2021-06-05 22:15:38,461 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1578 ImplicationChecksByTransitivity, 887.0ms TimeCoverageRelationStatistics Valid=534, Invalid=4296, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 22:15:38,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1859 states. [2021-06-05 22:15:38,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1859 to 992. [2021-06-05 22:15:38,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 991 states have (on average 3.256306760847629) internal successors, (3227), 991 states have internal predecessors, (3227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:38,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 3227 transitions. [2021-06-05 22:15:38,474 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 3227 transitions. Word has length 25 [2021-06-05 22:15:38,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:38,474 INFO L482 AbstractCegarLoop]: Abstraction has 992 states and 3227 transitions. [2021-06-05 22:15:38,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:38,474 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 3227 transitions. [2021-06-05 22:15:38,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:15:38,475 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:38,475 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:38,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 378 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8242 [2021-06-05 22:15:38,676 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:38,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:38,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1074702980, now seen corresponding path program 377 times [2021-06-05 22:15:38,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:38,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486495032] [2021-06-05 22:15:38,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:38,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:38,758 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:38,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:38,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486495032] [2021-06-05 22:15:38,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486495032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:38,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915788674] [2021-06-05 22:15:38,758 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:38,885 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:15:38,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:38,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 22:15:38,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:39,131 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:39,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915788674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:39,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:39,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 22:15:39,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584945940] [2021-06-05 22:15:39,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:15:39,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:39,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:15:39,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:15:39,132 INFO L87 Difference]: Start difference. First operand 992 states and 3227 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:40,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:40,848 INFO L93 Difference]: Finished difference Result 1655 states and 5144 transitions. [2021-06-05 22:15:40,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 22:15:40,849 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:15:40,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:40,851 INFO L225 Difference]: With dead ends: 1655 [2021-06-05 22:15:40,851 INFO L226 Difference]: Without dead ends: 1603 [2021-06-05 22:15:40,851 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1781 ImplicationChecksByTransitivity, 929.7ms TimeCoverageRelationStatistics Valid=518, Invalid=4738, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 22:15:40,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1603 states. [2021-06-05 22:15:40,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1603 to 906. [2021-06-05 22:15:40,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 905 states have (on average 3.2220994475138123) internal successors, (2916), 905 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:40,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 2916 transitions. [2021-06-05 22:15:40,862 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 2916 transitions. Word has length 25 [2021-06-05 22:15:40,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:40,862 INFO L482 AbstractCegarLoop]: Abstraction has 906 states and 2916 transitions. [2021-06-05 22:15:40,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:40,863 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 2916 transitions. [2021-06-05 22:15:40,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:15:40,863 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:40,864 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:41,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8287,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:41,064 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:41,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:41,064 INFO L82 PathProgramCache]: Analyzing trace with hash -53353936, now seen corresponding path program 378 times [2021-06-05 22:15:41,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:41,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704169904] [2021-06-05 22:15:41,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:41,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:41,144 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:41,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:41,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704169904] [2021-06-05 22:15:41,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704169904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:41,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162357406] [2021-06-05 22:15:41,145 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:41,271 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:15:41,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:41,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 22:15:41,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:41,519 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:41,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162357406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:41,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:41,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 22:15:41,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750527177] [2021-06-05 22:15:41,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:15:41,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:41,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:15:41,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:15:41,520 INFO L87 Difference]: Start difference. First operand 906 states and 2916 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:42,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:42,827 INFO L93 Difference]: Finished difference Result 1471 states and 4521 transitions. [2021-06-05 22:15:42,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 22:15:42,828 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:15:42,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:42,829 INFO L225 Difference]: With dead ends: 1471 [2021-06-05 22:15:42,829 INFO L226 Difference]: Without dead ends: 1350 [2021-06-05 22:15:42,830 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1202 ImplicationChecksByTransitivity, 841.8ms TimeCoverageRelationStatistics Valid=370, Invalid=3536, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 22:15:42,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2021-06-05 22:15:42,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 948. [2021-06-05 22:15:42,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 947 states have (on average 3.2270327349524814) internal successors, (3056), 947 states have internal predecessors, (3056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:42,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 3056 transitions. [2021-06-05 22:15:42,840 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 3056 transitions. Word has length 25 [2021-06-05 22:15:42,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:42,841 INFO L482 AbstractCegarLoop]: Abstraction has 948 states and 3056 transitions. [2021-06-05 22:15:42,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:42,841 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 3056 transitions. [2021-06-05 22:15:42,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:15:42,842 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:42,842 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:43,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8293,380 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:43,042 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:43,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:43,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1970518220, now seen corresponding path program 379 times [2021-06-05 22:15:43,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:43,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298354838] [2021-06-05 22:15:43,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:43,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:43,130 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:43,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:43,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298354838] [2021-06-05 22:15:43,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298354838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:43,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823277816] [2021-06-05 22:15:43,130 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:43,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:43,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 22:15:43,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:43,509 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:43,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823277816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:43,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:43,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 22:15:43,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363543626] [2021-06-05 22:15:43,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:15:43,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:43,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:15:43,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:15:43,510 INFO L87 Difference]: Start difference. First operand 948 states and 3056 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:45,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:45,641 INFO L93 Difference]: Finished difference Result 1694 states and 5196 transitions. [2021-06-05 22:15:45,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 22:15:45,641 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:15:45,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:45,643 INFO L225 Difference]: With dead ends: 1694 [2021-06-05 22:15:45,643 INFO L226 Difference]: Without dead ends: 1616 [2021-06-05 22:15:45,644 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2281 ImplicationChecksByTransitivity, 1633.7ms TimeCoverageRelationStatistics Valid=741, Invalid=6065, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 22:15:45,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2021-06-05 22:15:45,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 992. [2021-06-05 22:15:45,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 991 states have (on average 3.2431886982845612) internal successors, (3214), 991 states have internal predecessors, (3214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:45,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 3214 transitions. [2021-06-05 22:15:45,656 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 3214 transitions. Word has length 25 [2021-06-05 22:15:45,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:45,656 INFO L482 AbstractCegarLoop]: Abstraction has 992 states and 3214 transitions. [2021-06-05 22:15:45,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:45,656 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 3214 transitions. [2021-06-05 22:15:45,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:15:45,657 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:45,657 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:45,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8310 [2021-06-05 22:15:45,857 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:45,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:45,858 INFO L82 PathProgramCache]: Analyzing trace with hash -785436240, now seen corresponding path program 380 times [2021-06-05 22:15:45,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:45,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340189221] [2021-06-05 22:15:45,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:45,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:45,949 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:45,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:45,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340189221] [2021-06-05 22:15:45,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340189221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:45,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593083590] [2021-06-05 22:15:45,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:46,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:15:46,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:46,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 22:15:46,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:46,313 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:46,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593083590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:46,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:46,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 22:15:46,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293357235] [2021-06-05 22:15:46,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:15:46,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:46,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:15:46,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:15:46,314 INFO L87 Difference]: Start difference. First operand 992 states and 3214 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:47,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:47,659 INFO L93 Difference]: Finished difference Result 1552 states and 4821 transitions. [2021-06-05 22:15:47,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 22:15:47,659 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:15:47,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:47,661 INFO L225 Difference]: With dead ends: 1552 [2021-06-05 22:15:47,661 INFO L226 Difference]: Without dead ends: 1500 [2021-06-05 22:15:47,662 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1703 ImplicationChecksByTransitivity, 968.8ms TimeCoverageRelationStatistics Valid=640, Invalid=4616, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 22:15:47,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1500 states. [2021-06-05 22:15:47,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1500 to 936. [2021-06-05 22:15:47,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 935 states have (on average 3.225668449197861) internal successors, (3016), 935 states have internal predecessors, (3016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:47,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 3016 transitions. [2021-06-05 22:15:47,676 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 3016 transitions. Word has length 25 [2021-06-05 22:15:47,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:47,676 INFO L482 AbstractCegarLoop]: Abstraction has 936 states and 3016 transitions. [2021-06-05 22:15:47,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:47,676 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 3016 transitions. [2021-06-05 22:15:47,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:15:47,677 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:47,677 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:47,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8328,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:47,877 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:47,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:47,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1051515368, now seen corresponding path program 381 times [2021-06-05 22:15:47,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:47,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095114806] [2021-06-05 22:15:47,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:47,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:47,960 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:47,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:47,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095114806] [2021-06-05 22:15:47,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095114806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:47,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186840989] [2021-06-05 22:15:47,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:48,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:15:48,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:48,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 22:15:48,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:48,563 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:48,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186840989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:48,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:48,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 22:15:48,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320292898] [2021-06-05 22:15:48,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:15:48,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:48,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:15:48,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:15:48,564 INFO L87 Difference]: Start difference. First operand 936 states and 3016 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:50,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:50,467 INFO L93 Difference]: Finished difference Result 1792 states and 5483 transitions. [2021-06-05 22:15:50,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 22:15:50,467 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:15:50,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:50,469 INFO L225 Difference]: With dead ends: 1792 [2021-06-05 22:15:50,470 INFO L226 Difference]: Without dead ends: 1714 [2021-06-05 22:15:50,470 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1902 ImplicationChecksByTransitivity, 1455.0ms TimeCoverageRelationStatistics Valid=560, Invalid=4696, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 22:15:50,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2021-06-05 22:15:50,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1006. [2021-06-05 22:15:50,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006 states, 1005 states have (on average 3.256716417910448) internal successors, (3273), 1005 states have internal predecessors, (3273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:50,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 3273 transitions. [2021-06-05 22:15:50,483 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 3273 transitions. Word has length 25 [2021-06-05 22:15:50,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:50,483 INFO L482 AbstractCegarLoop]: Abstraction has 1006 states and 3273 transitions. [2021-06-05 22:15:50,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:50,483 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 3273 transitions. [2021-06-05 22:15:50,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:15:50,484 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:50,484 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:50,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8342 [2021-06-05 22:15:50,684 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:50,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:50,685 INFO L82 PathProgramCache]: Analyzing trace with hash -2058369948, now seen corresponding path program 382 times [2021-06-05 22:15:50,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:50,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361256712] [2021-06-05 22:15:50,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:50,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:50,771 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:50,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:50,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361256712] [2021-06-05 22:15:50,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361256712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:50,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37279592] [2021-06-05 22:15:50,771 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:50,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:15:50,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:50,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 22:15:50,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:51,225 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:51,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37279592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:51,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:51,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 22:15:51,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943004191] [2021-06-05 22:15:51,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:15:51,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:51,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:15:51,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:15:51,225 INFO L87 Difference]: Start difference. First operand 1006 states and 3273 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:52,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:52,851 INFO L93 Difference]: Finished difference Result 1838 states and 5649 transitions. [2021-06-05 22:15:52,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 22:15:52,851 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:15:52,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:52,853 INFO L225 Difference]: With dead ends: 1838 [2021-06-05 22:15:52,853 INFO L226 Difference]: Without dead ends: 1786 [2021-06-05 22:15:52,854 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1870 ImplicationChecksByTransitivity, 1245.3ms TimeCoverageRelationStatistics Valid=686, Invalid=5014, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 22:15:52,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-06-05 22:15:52,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 993. [2021-06-05 22:15:52,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 993 states, 992 states have (on average 3.255040322580645) internal successors, (3229), 992 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:52,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 3229 transitions. [2021-06-05 22:15:52,872 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 3229 transitions. Word has length 25 [2021-06-05 22:15:52,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:52,872 INFO L482 AbstractCegarLoop]: Abstraction has 993 states and 3229 transitions. [2021-06-05 22:15:52,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:52,873 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 3229 transitions. [2021-06-05 22:15:52,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:15:52,874 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:52,874 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:53,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 384 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8455 [2021-06-05 22:15:53,085 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:53,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:53,085 INFO L82 PathProgramCache]: Analyzing trace with hash -298317008, now seen corresponding path program 383 times [2021-06-05 22:15:53,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:53,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005343965] [2021-06-05 22:15:53,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:53,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:53,175 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:53,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:53,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005343965] [2021-06-05 22:15:53,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005343965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:53,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650783655] [2021-06-05 22:15:53,175 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:53,303 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:15:53,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:53,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 22:15:53,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:53,535 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:53,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650783655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:53,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:53,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 22:15:53,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466118556] [2021-06-05 22:15:53,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:15:53,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:53,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:15:53,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:15:53,536 INFO L87 Difference]: Start difference. First operand 993 states and 3229 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:54,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:54,975 INFO L93 Difference]: Finished difference Result 1639 states and 5093 transitions. [2021-06-05 22:15:54,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 22:15:54,975 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:15:54,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:54,977 INFO L225 Difference]: With dead ends: 1639 [2021-06-05 22:15:54,977 INFO L226 Difference]: Without dead ends: 1587 [2021-06-05 22:15:54,978 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1622 ImplicationChecksByTransitivity, 930.5ms TimeCoverageRelationStatistics Valid=507, Invalid=4463, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 22:15:54,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1587 states. [2021-06-05 22:15:54,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1587 to 921. [2021-06-05 22:15:54,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 921 states, 920 states have (on average 3.222826086956522) internal successors, (2965), 920 states have internal predecessors, (2965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:54,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 921 states to 921 states and 2965 transitions. [2021-06-05 22:15:54,998 INFO L78 Accepts]: Start accepts. Automaton has 921 states and 2965 transitions. Word has length 25 [2021-06-05 22:15:54,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:54,998 INFO L482 AbstractCegarLoop]: Abstraction has 921 states and 2965 transitions. [2021-06-05 22:15:54,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:54,998 INFO L276 IsEmpty]: Start isEmpty. Operand 921 states and 2965 transitions. [2021-06-05 22:15:54,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:15:54,999 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:54,999 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:55,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8485,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:55,201 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:55,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:55,202 INFO L82 PathProgramCache]: Analyzing trace with hash 245276084, now seen corresponding path program 384 times [2021-06-05 22:15:55,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:55,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920087367] [2021-06-05 22:15:55,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:55,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:55,288 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:55,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:55,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920087367] [2021-06-05 22:15:55,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920087367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:55,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857783215] [2021-06-05 22:15:55,288 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:55,414 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 22:15:55,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:55,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 22:15:55,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:55,769 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:55,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857783215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:55,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:55,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 22:15:55,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983516558] [2021-06-05 22:15:55,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:15:55,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:55,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:15:55,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:15:55,770 INFO L87 Difference]: Start difference. First operand 921 states and 2965 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:57,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:57,651 INFO L93 Difference]: Finished difference Result 1809 states and 5531 transitions. [2021-06-05 22:15:57,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 22:15:57,651 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:15:57,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:57,653 INFO L225 Difference]: With dead ends: 1809 [2021-06-05 22:15:57,653 INFO L226 Difference]: Without dead ends: 1731 [2021-06-05 22:15:57,654 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1399 ImplicationChecksByTransitivity, 1378.4ms TimeCoverageRelationStatistics Valid=524, Invalid=4032, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 22:15:57,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1731 states. [2021-06-05 22:15:57,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1731 to 1020. [2021-06-05 22:15:57,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1020 states, 1019 states have (on average 3.2688910696761533) internal successors, (3331), 1019 states have internal predecessors, (3331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:57,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1020 states to 1020 states and 3331 transitions. [2021-06-05 22:15:57,666 INFO L78 Accepts]: Start accepts. Automaton has 1020 states and 3331 transitions. Word has length 25 [2021-06-05 22:15:57,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:57,666 INFO L482 AbstractCegarLoop]: Abstraction has 1020 states and 3331 transitions. [2021-06-05 22:15:57,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:57,666 INFO L276 IsEmpty]: Start isEmpty. Operand 1020 states and 3331 transitions. [2021-06-05 22:15:57,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:15:57,667 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:57,667 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:57,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8491,386 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:57,867 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:57,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:57,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1430358064, now seen corresponding path program 385 times [2021-06-05 22:15:57,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:57,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393318386] [2021-06-05 22:15:57,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:57,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:57,960 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:57,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:57,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393318386] [2021-06-05 22:15:57,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393318386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:57,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834954020] [2021-06-05 22:15:57,960 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:58,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:58,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 22:15:58,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:58,622 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:58,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834954020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:58,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:58,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 22:15:58,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442154552] [2021-06-05 22:15:58,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:15:58,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:58,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:15:58,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:15:58,623 INFO L87 Difference]: Start difference. First operand 1020 states and 3331 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:00,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:00,488 INFO L93 Difference]: Finished difference Result 1883 states and 5773 transitions. [2021-06-05 22:16:00,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 22:16:00,489 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:16:00,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:00,491 INFO L225 Difference]: With dead ends: 1883 [2021-06-05 22:16:00,491 INFO L226 Difference]: Without dead ends: 1831 [2021-06-05 22:16:00,492 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1875 ImplicationChecksByTransitivity, 1373.9ms TimeCoverageRelationStatistics Valid=725, Invalid=5127, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 22:16:00,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1831 states. [2021-06-05 22:16:00,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1831 to 1007. [2021-06-05 22:16:00,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1007 states, 1006 states have (on average 3.2673956262425445) internal successors, (3287), 1006 states have internal predecessors, (3287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:00,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1007 states to 1007 states and 3287 transitions. [2021-06-05 22:16:00,505 INFO L78 Accepts]: Start accepts. Automaton has 1007 states and 3287 transitions. Word has length 25 [2021-06-05 22:16:00,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:00,505 INFO L482 AbstractCegarLoop]: Abstraction has 1007 states and 3287 transitions. [2021-06-05 22:16:00,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:00,505 INFO L276 IsEmpty]: Start isEmpty. Operand 1007 states and 3287 transitions. [2021-06-05 22:16:00,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:16:00,506 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:00,506 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:00,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 387 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8531 [2021-06-05 22:16:00,707 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:00,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:00,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1104556292, now seen corresponding path program 386 times [2021-06-05 22:16:00,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:00,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904535667] [2021-06-05 22:16:00,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:00,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:00,800 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:00,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:00,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904535667] [2021-06-05 22:16:00,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904535667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:00,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931797555] [2021-06-05 22:16:00,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:00,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:16:00,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:00,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 22:16:00,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:01,177 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:01,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931797555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:01,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:01,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 22:16:01,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362756842] [2021-06-05 22:16:01,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:16:01,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:01,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:16:01,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:16:01,177 INFO L87 Difference]: Start difference. First operand 1007 states and 3287 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:03,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:03,065 INFO L93 Difference]: Finished difference Result 1638 states and 5108 transitions. [2021-06-05 22:16:03,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 22:16:03,065 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:16:03,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:03,068 INFO L225 Difference]: With dead ends: 1638 [2021-06-05 22:16:03,068 INFO L226 Difference]: Without dead ends: 1586 [2021-06-05 22:16:03,068 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1669 ImplicationChecksByTransitivity, 1235.6ms TimeCoverageRelationStatistics Valid=580, Invalid=4532, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 22:16:03,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1586 states. [2021-06-05 22:16:03,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1586 to 992. [2021-06-05 22:16:03,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 991 states have (on average 3.265388496468214) internal successors, (3236), 991 states have internal predecessors, (3236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:03,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 3236 transitions. [2021-06-05 22:16:03,080 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 3236 transitions. Word has length 25 [2021-06-05 22:16:03,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:03,080 INFO L482 AbstractCegarLoop]: Abstraction has 992 states and 3236 transitions. [2021-06-05 22:16:03,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:03,080 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 3236 transitions. [2021-06-05 22:16:03,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:16:03,081 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:03,081 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:03,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8663 [2021-06-05 22:16:03,282 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:03,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:03,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1917477296, now seen corresponding path program 387 times [2021-06-05 22:16:03,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:03,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637674573] [2021-06-05 22:16:03,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:03,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:03,370 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:03,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:03,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637674573] [2021-06-05 22:16:03,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637674573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:03,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771540949] [2021-06-05 22:16:03,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:03,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:16:03,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:03,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 22:16:03,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:03,743 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:03,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771540949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:03,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:03,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 22:16:03,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407923935] [2021-06-05 22:16:03,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:16:03,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:03,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:16:03,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:16:03,744 INFO L87 Difference]: Start difference. First operand 992 states and 3236 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:05,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:05,633 INFO L93 Difference]: Finished difference Result 1573 states and 4896 transitions. [2021-06-05 22:16:05,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 22:16:05,633 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:16:05,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:05,635 INFO L225 Difference]: With dead ends: 1573 [2021-06-05 22:16:05,635 INFO L226 Difference]: Without dead ends: 1521 [2021-06-05 22:16:05,635 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1528 ImplicationChecksByTransitivity, 1011.8ms TimeCoverageRelationStatistics Valid=509, Invalid=4321, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 22:16:05,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1521 states. [2021-06-05 22:16:05,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1521 to 893. [2021-06-05 22:16:05,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 3.2208520179372195) internal successors, (2873), 892 states have internal predecessors, (2873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:05,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 2873 transitions. [2021-06-05 22:16:05,646 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 2873 transitions. Word has length 25 [2021-06-05 22:16:05,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:05,646 INFO L482 AbstractCegarLoop]: Abstraction has 893 states and 2873 transitions. [2021-06-05 22:16:05,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:05,646 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 2873 transitions. [2021-06-05 22:16:05,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:16:05,647 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:05,647 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:05,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8669,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:05,847 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:05,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:05,848 INFO L82 PathProgramCache]: Analyzing trace with hash -458628254, now seen corresponding path program 388 times [2021-06-05 22:16:05,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:05,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146520462] [2021-06-05 22:16:05,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:05,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:05,931 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:05,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:05,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146520462] [2021-06-05 22:16:05,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146520462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:05,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22914566] [2021-06-05 22:16:05,932 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:06,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:16:06,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:06,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 22:16:06,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:06,287 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:06,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22914566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:06,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:06,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 22:16:06,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453401518] [2021-06-05 22:16:06,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:16:06,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:06,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:16:06,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:16:06,288 INFO L87 Difference]: Start difference. First operand 893 states and 2873 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:08,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:08,350 INFO L93 Difference]: Finished difference Result 1474 states and 4523 transitions. [2021-06-05 22:16:08,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 22:16:08,350 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:16:08,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:08,352 INFO L225 Difference]: With dead ends: 1474 [2021-06-05 22:16:08,352 INFO L226 Difference]: Without dead ends: 1353 [2021-06-05 22:16:08,352 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1817 ImplicationChecksByTransitivity, 1158.3ms TimeCoverageRelationStatistics Valid=525, Invalid=5175, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 22:16:08,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1353 states. [2021-06-05 22:16:08,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1353 to 897. [2021-06-05 22:16:08,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 3.2154017857142856) internal successors, (2881), 896 states have internal predecessors, (2881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:08,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 2881 transitions. [2021-06-05 22:16:08,362 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 2881 transitions. Word has length 25 [2021-06-05 22:16:08,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:08,362 INFO L482 AbstractCegarLoop]: Abstraction has 897 states and 2881 transitions. [2021-06-05 22:16:08,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:08,362 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 2881 transitions. [2021-06-05 22:16:08,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:16:08,363 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:08,363 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:08,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8675 [2021-06-05 22:16:08,564 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:08,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:08,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1919174758, now seen corresponding path program 389 times [2021-06-05 22:16:08,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:08,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846856249] [2021-06-05 22:16:08,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:08,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:08,651 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:08,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:08,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846856249] [2021-06-05 22:16:08,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846856249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:08,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102789962] [2021-06-05 22:16:08,652 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:08,779 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:16:08,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:08,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 22:16:08,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:09,020 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:09,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102789962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:09,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:09,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 22:16:09,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546608021] [2021-06-05 22:16:09,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:16:09,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:09,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:16:09,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:16:09,021 INFO L87 Difference]: Start difference. First operand 897 states and 2881 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:11,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:11,485 INFO L93 Difference]: Finished difference Result 1790 states and 5503 transitions. [2021-06-05 22:16:11,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-05 22:16:11,485 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:16:11,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:11,488 INFO L225 Difference]: With dead ends: 1790 [2021-06-05 22:16:11,488 INFO L226 Difference]: Without dead ends: 1712 [2021-06-05 22:16:11,488 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2808 ImplicationChecksByTransitivity, 1756.6ms TimeCoverageRelationStatistics Valid=782, Invalid=7408, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 22:16:11,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1712 states. [2021-06-05 22:16:11,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1712 to 938. [2021-06-05 22:16:11,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 937 states have (on average 3.2283884738527213) internal successors, (3025), 937 states have internal predecessors, (3025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:11,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 3025 transitions. [2021-06-05 22:16:11,500 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 3025 transitions. Word has length 25 [2021-06-05 22:16:11,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:11,500 INFO L482 AbstractCegarLoop]: Abstraction has 938 states and 3025 transitions. [2021-06-05 22:16:11,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:11,500 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 3025 transitions. [2021-06-05 22:16:11,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:16:11,501 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:11,501 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:11,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 391 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8688 [2021-06-05 22:16:11,701 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:11,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:11,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1190710558, now seen corresponding path program 390 times [2021-06-05 22:16:11,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:11,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646325023] [2021-06-05 22:16:11,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:11,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:11,793 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:11,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:11,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646325023] [2021-06-05 22:16:11,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646325023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:11,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127676251] [2021-06-05 22:16:11,794 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:11,923 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 22:16:11,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:11,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 22:16:11,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:12,175 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:12,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127676251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:12,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:12,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 22:16:12,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710804842] [2021-06-05 22:16:12,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:16:12,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:12,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:16:12,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:16:12,176 INFO L87 Difference]: Start difference. First operand 938 states and 3025 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:14,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:14,087 INFO L93 Difference]: Finished difference Result 1596 states and 4957 transitions. [2021-06-05 22:16:14,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-05 22:16:14,087 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:16:14,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:14,089 INFO L225 Difference]: With dead ends: 1596 [2021-06-05 22:16:14,089 INFO L226 Difference]: Without dead ends: 1544 [2021-06-05 22:16:14,090 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2483 ImplicationChecksByTransitivity, 1170.5ms TimeCoverageRelationStatistics Valid=787, Invalid=6523, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 22:16:14,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-06-05 22:16:14,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 878. [2021-06-05 22:16:14,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 877 states have (on average 3.2052451539338653) internal successors, (2811), 877 states have internal predecessors, (2811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:14,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 2811 transitions. [2021-06-05 22:16:14,102 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 2811 transitions. Word has length 25 [2021-06-05 22:16:14,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:14,102 INFO L482 AbstractCegarLoop]: Abstraction has 878 states and 2811 transitions. [2021-06-05 22:16:14,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:14,102 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 2811 transitions. [2021-06-05 22:16:14,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:16:14,103 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:14,103 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:14,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 392 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8697 [2021-06-05 22:16:14,304 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:14,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:14,304 INFO L82 PathProgramCache]: Analyzing trace with hash 646241050, now seen corresponding path program 391 times [2021-06-05 22:16:14,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:14,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723128112] [2021-06-05 22:16:14,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:14,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:14,388 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:14,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:14,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723128112] [2021-06-05 22:16:14,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723128112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:14,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587202746] [2021-06-05 22:16:14,388 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:14,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:14,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 22:16:14,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:14,879 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:14,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587202746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:14,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:14,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 22:16:14,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421485888] [2021-06-05 22:16:14,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:16:14,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:14,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:16:14,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:16:14,879 INFO L87 Difference]: Start difference. First operand 878 states and 2811 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:17,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:17,382 INFO L93 Difference]: Finished difference Result 1955 states and 5962 transitions. [2021-06-05 22:16:17,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 22:16:17,382 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:16:17,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:17,384 INFO L225 Difference]: With dead ends: 1955 [2021-06-05 22:16:17,384 INFO L226 Difference]: Without dead ends: 1877 [2021-06-05 22:16:17,385 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2555 ImplicationChecksByTransitivity, 1666.7ms TimeCoverageRelationStatistics Valid=707, Invalid=6775, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 22:16:17,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1877 states. [2021-06-05 22:16:17,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1877 to 947. [2021-06-05 22:16:17,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 946 states have (on average 3.2389006342494713) internal successors, (3064), 946 states have internal predecessors, (3064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:17,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 3064 transitions. [2021-06-05 22:16:17,397 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 3064 transitions. Word has length 25 [2021-06-05 22:16:17,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:17,397 INFO L482 AbstractCegarLoop]: Abstraction has 947 states and 3064 transitions. [2021-06-05 22:16:17,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:17,398 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 3064 transitions. [2021-06-05 22:16:17,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:16:17,398 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:17,399 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:17,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8714,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:17,599 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:17,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:17,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1831323030, now seen corresponding path program 392 times [2021-06-05 22:16:17,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:17,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579091376] [2021-06-05 22:16:17,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:17,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:17,687 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:17,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:17,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579091376] [2021-06-05 22:16:17,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579091376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:17,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232372252] [2021-06-05 22:16:17,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:17,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:16:17,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:17,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 22:16:17,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:18,156 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:18,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232372252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:18,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:18,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 22:16:18,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358072194] [2021-06-05 22:16:18,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:16:18,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:18,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:16:18,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:16:18,157 INFO L87 Difference]: Start difference. First operand 947 states and 3064 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:20,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:20,348 INFO L93 Difference]: Finished difference Result 2050 states and 6284 transitions. [2021-06-05 22:16:20,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-06-05 22:16:20,348 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:16:20,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:20,351 INFO L225 Difference]: With dead ends: 2050 [2021-06-05 22:16:20,351 INFO L226 Difference]: Without dead ends: 1998 [2021-06-05 22:16:20,352 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3104 ImplicationChecksByTransitivity, 1516.2ms TimeCoverageRelationStatistics Valid=912, Invalid=8018, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 22:16:20,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1998 states. [2021-06-05 22:16:20,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1998 to 934. [2021-06-05 22:16:20,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 933 states have (on average 3.2368703108252945) internal successors, (3020), 933 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:20,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 3020 transitions. [2021-06-05 22:16:20,365 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 3020 transitions. Word has length 25 [2021-06-05 22:16:20,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:20,365 INFO L482 AbstractCegarLoop]: Abstraction has 934 states and 3020 transitions. [2021-06-05 22:16:20,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:20,365 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 3020 transitions. [2021-06-05 22:16:20,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:16:20,366 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:20,366 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:20,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8767,394 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:20,566 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:20,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:20,567 INFO L82 PathProgramCache]: Analyzing trace with hash -703591326, now seen corresponding path program 393 times [2021-06-05 22:16:20,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:20,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643698714] [2021-06-05 22:16:20,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:20,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:20,648 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:20,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:20,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643698714] [2021-06-05 22:16:20,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643698714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:20,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531621765] [2021-06-05 22:16:20,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:20,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:16:20,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:20,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 22:16:20,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:21,028 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:21,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531621765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:21,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:21,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 22:16:21,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203474705] [2021-06-05 22:16:21,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:16:21,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:21,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:16:21,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:16:21,029 INFO L87 Difference]: Start difference. First operand 934 states and 3020 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:23,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:23,089 INFO L93 Difference]: Finished difference Result 1714 states and 5308 transitions. [2021-06-05 22:16:23,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-05 22:16:23,089 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:16:23,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:23,091 INFO L225 Difference]: With dead ends: 1714 [2021-06-05 22:16:23,091 INFO L226 Difference]: Without dead ends: 1662 [2021-06-05 22:16:23,092 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2270 ImplicationChecksByTransitivity, 1151.1ms TimeCoverageRelationStatistics Valid=646, Invalid=6160, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 22:16:23,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1662 states. [2021-06-05 22:16:23,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1662 to 862. [2021-06-05 22:16:23,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 3.2009291521486642) internal successors, (2756), 861 states have internal predecessors, (2756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:23,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 2756 transitions. [2021-06-05 22:16:23,102 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 2756 transitions. Word has length 25 [2021-06-05 22:16:23,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:23,102 INFO L482 AbstractCegarLoop]: Abstraction has 862 states and 2756 transitions. [2021-06-05 22:16:23,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:23,102 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 2756 transitions. [2021-06-05 22:16:23,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:16:23,103 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:23,103 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:23,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8809,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:23,304 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:23,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:23,304 INFO L82 PathProgramCache]: Analyzing trace with hash -159998234, now seen corresponding path program 394 times [2021-06-05 22:16:23,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:23,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497262829] [2021-06-05 22:16:23,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:23,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:23,391 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:23,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:23,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497262829] [2021-06-05 22:16:23,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497262829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:23,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406467824] [2021-06-05 22:16:23,391 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:23,520 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:16:23,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:23,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 22:16:23,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:23,989 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:23,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406467824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:23,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:23,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 22:16:23,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682846229] [2021-06-05 22:16:23,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:16:23,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:23,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:16:23,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:16:23,990 INFO L87 Difference]: Start difference. First operand 862 states and 2756 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:25,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:25,931 INFO L93 Difference]: Finished difference Result 1736 states and 5285 transitions. [2021-06-05 22:16:25,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 22:16:25,932 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:16:25,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:25,934 INFO L225 Difference]: With dead ends: 1736 [2021-06-05 22:16:25,934 INFO L226 Difference]: Without dead ends: 1658 [2021-06-05 22:16:25,935 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1635 ImplicationChecksByTransitivity, 1169.4ms TimeCoverageRelationStatistics Valid=505, Invalid=4751, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 22:16:25,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1658 states. [2021-06-05 22:16:25,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1658 to 959. [2021-06-05 22:16:25,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 959 states, 958 states have (on average 3.2526096033402925) internal successors, (3116), 958 states have internal predecessors, (3116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:25,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 3116 transitions. [2021-06-05 22:16:25,951 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 3116 transitions. Word has length 25 [2021-06-05 22:16:25,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:25,951 INFO L482 AbstractCegarLoop]: Abstraction has 959 states and 3116 transitions. [2021-06-05 22:16:25,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:25,951 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 3116 transitions. [2021-06-05 22:16:25,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:16:25,952 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:25,952 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:26,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8815,396 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:26,153 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:26,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:26,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1025083746, now seen corresponding path program 395 times [2021-06-05 22:16:26,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:26,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459199027] [2021-06-05 22:16:26,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:26,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:26,266 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:26,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:26,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459199027] [2021-06-05 22:16:26,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459199027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:26,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618648733] [2021-06-05 22:16:26,267 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:26,398 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:16:26,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:26,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 22:16:26,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:26,857 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:26,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618648733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:26,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:26,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 22:16:26,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485954266] [2021-06-05 22:16:26,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:16:26,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:26,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:16:26,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:16:26,858 INFO L87 Difference]: Start difference. First operand 959 states and 3116 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:28,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:28,535 INFO L93 Difference]: Finished difference Result 1641 states and 5003 transitions. [2021-06-05 22:16:28,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 22:16:28,535 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:16:28,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:28,537 INFO L225 Difference]: With dead ends: 1641 [2021-06-05 22:16:28,537 INFO L226 Difference]: Without dead ends: 1589 [2021-06-05 22:16:28,537 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1523 ImplicationChecksByTransitivity, 1017.7ms TimeCoverageRelationStatistics Valid=557, Invalid=4413, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 22:16:28,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2021-06-05 22:16:28,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 946. [2021-06-05 22:16:28,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 946 states, 945 states have (on average 3.250793650793651) internal successors, (3072), 945 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:28,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 3072 transitions. [2021-06-05 22:16:28,549 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 3072 transitions. Word has length 25 [2021-06-05 22:16:28,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:28,549 INFO L482 AbstractCegarLoop]: Abstraction has 946 states and 3072 transitions. [2021-06-05 22:16:28,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:28,549 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 3072 transitions. [2021-06-05 22:16:28,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:16:28,550 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:28,550 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:28,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8874 [2021-06-05 22:16:28,750 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:28,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:28,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1509830610, now seen corresponding path program 396 times [2021-06-05 22:16:28,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:28,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101734290] [2021-06-05 22:16:28,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:28,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:28,833 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:28,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:28,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101734290] [2021-06-05 22:16:28,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101734290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:28,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926791734] [2021-06-05 22:16:28,833 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:28,961 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:16:28,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:28,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 22:16:28,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:29,227 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:29,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926791734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:29,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:29,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 22:16:29,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076791401] [2021-06-05 22:16:29,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:16:29,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:29,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:16:29,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:16:29,228 INFO L87 Difference]: Start difference. First operand 946 states and 3072 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:30,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:30,949 INFO L93 Difference]: Finished difference Result 1571 states and 4874 transitions. [2021-06-05 22:16:30,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 22:16:30,950 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:16:30,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:30,951 INFO L225 Difference]: With dead ends: 1571 [2021-06-05 22:16:30,951 INFO L226 Difference]: Without dead ends: 1519 [2021-06-05 22:16:30,952 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1506 ImplicationChecksByTransitivity, 941.5ms TimeCoverageRelationStatistics Valid=462, Invalid=4368, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 22:16:30,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1519 states. [2021-06-05 22:16:30,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1519 to 931. [2021-06-05 22:16:30,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.2483870967741937) internal successors, (3021), 930 states have internal predecessors, (3021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:30,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3021 transitions. [2021-06-05 22:16:30,963 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3021 transitions. Word has length 25 [2021-06-05 22:16:30,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:30,963 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 3021 transitions. [2021-06-05 22:16:30,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:30,963 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3021 transitions. [2021-06-05 22:16:30,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:16:30,964 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:30,964 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:31,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8933,398 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:31,164 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:31,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:31,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1512202978, now seen corresponding path program 397 times [2021-06-05 22:16:31,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:31,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937082399] [2021-06-05 22:16:31,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:31,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:31,246 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:31,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:31,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937082399] [2021-06-05 22:16:31,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937082399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:31,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726541210] [2021-06-05 22:16:31,246 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:31,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:31,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 22:16:31,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:31,610 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:31,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726541210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:31,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:31,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 22:16:31,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304157568] [2021-06-05 22:16:31,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:16:31,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:31,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:16:31,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:16:31,611 INFO L87 Difference]: Start difference. First operand 931 states and 3021 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:33,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:33,254 INFO L93 Difference]: Finished difference Result 1506 states and 4662 transitions. [2021-06-05 22:16:33,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 22:16:33,254 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:16:33,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:33,256 INFO L225 Difference]: With dead ends: 1506 [2021-06-05 22:16:33,256 INFO L226 Difference]: Without dead ends: 1454 [2021-06-05 22:16:33,256 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 981.1ms TimeCoverageRelationStatistics Valid=512, Invalid=4600, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 22:16:33,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2021-06-05 22:16:33,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 845. [2021-06-05 22:16:33,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2002369668246446) internal successors, (2701), 844 states have internal predecessors, (2701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:33,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2701 transitions. [2021-06-05 22:16:33,267 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2701 transitions. Word has length 25 [2021-06-05 22:16:33,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:33,267 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2701 transitions. [2021-06-05 22:16:33,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:33,267 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2701 transitions. [2021-06-05 22:16:33,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:16:33,268 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:33,268 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:33,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8939 [2021-06-05 22:16:33,469 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:33,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:33,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1142902924, now seen corresponding path program 398 times [2021-06-05 22:16:33,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:33,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221248342] [2021-06-05 22:16:33,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:33,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:33,557 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:33,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:33,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221248342] [2021-06-05 22:16:33,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221248342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:33,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392713209] [2021-06-05 22:16:33,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:33,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:16:33,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:33,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 22:16:33,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:34,173 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:34,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392713209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:34,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:34,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 22:16:34,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903105335] [2021-06-05 22:16:34,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:16:34,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:34,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:16:34,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:16:34,174 INFO L87 Difference]: Start difference. First operand 845 states and 2701 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:36,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:36,511 INFO L93 Difference]: Finished difference Result 1597 states and 4791 transitions. [2021-06-05 22:16:36,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 22:16:36,512 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:16:36,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:36,514 INFO L225 Difference]: With dead ends: 1597 [2021-06-05 22:16:36,514 INFO L226 Difference]: Without dead ends: 1519 [2021-06-05 22:16:36,514 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1882 ImplicationChecksByTransitivity, 1468.8ms TimeCoverageRelationStatistics Valid=605, Invalid=5401, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 22:16:36,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1519 states. [2021-06-05 22:16:36,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1519 to 878. [2021-06-05 22:16:36,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 877 states have (on average 3.1904218928164196) internal successors, (2798), 877 states have internal predecessors, (2798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:36,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 2798 transitions. [2021-06-05 22:16:36,527 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 2798 transitions. Word has length 25 [2021-06-05 22:16:36,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:36,527 INFO L482 AbstractCegarLoop]: Abstraction has 878 states and 2798 transitions. [2021-06-05 22:16:36,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:36,527 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 2798 transitions. [2021-06-05 22:16:36,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:16:36,528 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:36,528 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:36,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8945,400 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:36,728 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:36,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:36,728 INFO L82 PathProgramCache]: Analyzing trace with hash 42179056, now seen corresponding path program 399 times [2021-06-05 22:16:36,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:36,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575596513] [2021-06-05 22:16:36,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:36,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:36,832 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:36,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:36,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575596513] [2021-06-05 22:16:36,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575596513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:36,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89504358] [2021-06-05 22:16:36,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:37,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:16:37,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:37,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 22:16:37,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:37,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:16:37,110 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:37,177 INFO L628 ElimStorePlain]: treesize reduction 52, result has 56.3 percent of original size [2021-06-05 22:16:37,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:16:37,181 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:37,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:16:37,184 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:37,237 INFO L628 ElimStorePlain]: treesize reduction 4, result has 93.3 percent of original size [2021-06-05 22:16:37,239 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 22:16:37,240 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:122, output treesize:48 [2021-06-05 22:16:37,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:37,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:37,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:16:37,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:37,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:37,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:37,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:16:37,845 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:37,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:37,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:37,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:16:37,850 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:37,853 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:37,853 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:37,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:37,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:16:37,857 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:38,007 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2021-06-05 22:16:38,008 INFO L628 ElimStorePlain]: treesize reduction 140, result has 46.6 percent of original size [2021-06-05 22:16:38,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:16:38,011 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:38,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:16:38,015 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:38,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:16:38,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 22:16:38,069 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:368, output treesize:78 [2021-06-05 22:16:38,229 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:16:38,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89504358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:38,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:38,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 22:16:38,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505149196] [2021-06-05 22:16:38,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:16:38,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:38,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:16:38,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:16:38,230 INFO L87 Difference]: Start difference. First operand 878 states and 2798 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:41,025 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2021-06-05 22:16:41,695 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2021-06-05 22:16:42,002 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2021-06-05 22:16:42,237 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 41 [2021-06-05 22:16:42,411 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2021-06-05 22:16:42,937 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 51 [2021-06-05 22:16:43,139 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2021-06-05 22:16:43,376 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2021-06-05 22:16:43,614 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 57 [2021-06-05 22:16:43,826 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 61 [2021-06-05 22:16:43,999 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 54 [2021-06-05 22:16:44,236 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2021-06-05 22:16:44,788 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 55 [2021-06-05 22:16:45,037 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2021-06-05 22:16:45,197 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2021-06-05 22:16:45,390 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2021-06-05 22:16:45,593 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 61 [2021-06-05 22:16:45,801 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 61 [2021-06-05 22:16:45,945 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2021-06-05 22:16:46,253 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2021-06-05 22:16:46,574 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-06-05 22:16:46,724 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 51 [2021-06-05 22:16:46,915 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2021-06-05 22:16:47,268 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 57 [2021-06-05 22:16:47,562 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 50 [2021-06-05 22:16:47,799 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 49 [2021-06-05 22:16:47,992 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2021-06-05 22:16:48,301 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 55 [2021-06-05 22:16:48,704 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2021-06-05 22:16:48,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:48,734 INFO L93 Difference]: Finished difference Result 2145 states and 6267 transitions. [2021-06-05 22:16:48,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2021-06-05 22:16:48,734 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:16:48,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:48,737 INFO L225 Difference]: With dead ends: 2145 [2021-06-05 22:16:48,737 INFO L226 Difference]: Without dead ends: 1823 [2021-06-05 22:16:48,737 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7443 ImplicationChecksByTransitivity, 9041.2ms TimeCoverageRelationStatistics Valid=1818, Invalid=19062, Unknown=0, NotChecked=0, Total=20880 [2021-06-05 22:16:48,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1823 states. [2021-06-05 22:16:48,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1823 to 1016. [2021-06-05 22:16:48,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1016 states, 1015 states have (on average 3.2) internal successors, (3248), 1015 states have internal predecessors, (3248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:48,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 3248 transitions. [2021-06-05 22:16:48,751 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 3248 transitions. Word has length 25 [2021-06-05 22:16:48,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:48,751 INFO L482 AbstractCegarLoop]: Abstraction has 1016 states and 3248 transitions. [2021-06-05 22:16:48,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:48,752 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 3248 transitions. [2021-06-05 22:16:48,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:16:48,753 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:48,753 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:48,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9050,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:48,953 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:48,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:48,953 INFO L82 PathProgramCache]: Analyzing trace with hash 853194326, now seen corresponding path program 400 times [2021-06-05 22:16:48,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:48,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465293413] [2021-06-05 22:16:48,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:48,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:49,044 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 22:16:49,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:49,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465293413] [2021-06-05 22:16:49,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465293413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:49,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911870023] [2021-06-05 22:16:49,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:49,173 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:16:49,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:49,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:16:49,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:49,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:49,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:49,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:16:49,461 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:49,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:16:49,465 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:49,596 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-06-05 22:16:49,597 INFO L628 ElimStorePlain]: treesize reduction 35, result has 79.2 percent of original size [2021-06-05 22:16:49,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:16:49,601 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:49,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:16:49,605 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:49,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:16:49,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:16:49,667 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:49,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:16:49,671 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:49,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:16:49,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:16:49,729 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:49,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:16:49,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-06-05 22:16:49,786 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 8 variables, input treesize:199, output treesize:114 [2021-06-05 22:16:50,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:16:50,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:50,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:50,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:16:50,043 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:50,078 INFO L628 ElimStorePlain]: treesize reduction 35, result has 47.8 percent of original size [2021-06-05 22:16:50,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:16:50,081 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:50,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:16:50,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:16:50,093 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:79, output treesize:13 [2021-06-05 22:16:50,147 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:50,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911870023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:50,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:50,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-06-05 22:16:50,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144601359] [2021-06-05 22:16:50,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:16:50,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:50,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:16:50,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:16:50,148 INFO L87 Difference]: Start difference. First operand 1016 states and 3248 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:50,951 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2021-06-05 22:16:51,085 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2021-06-05 22:16:51,350 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2021-06-05 22:16:52,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:52,787 INFO L93 Difference]: Finished difference Result 1770 states and 5324 transitions. [2021-06-05 22:16:52,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:16:52,787 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:16:52,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:52,789 INFO L225 Difference]: With dead ends: 1770 [2021-06-05 22:16:52,789 INFO L226 Difference]: Without dead ends: 1632 [2021-06-05 22:16:52,789 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 2470.4ms TimeCoverageRelationStatistics Valid=423, Invalid=1833, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 22:16:52,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1632 states. [2021-06-05 22:16:52,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1632 to 1027. [2021-06-05 22:16:52,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1027 states, 1026 states have (on average 3.211500974658869) internal successors, (3295), 1026 states have internal predecessors, (3295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:52,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1027 states to 1027 states and 3295 transitions. [2021-06-05 22:16:52,801 INFO L78 Accepts]: Start accepts. Automaton has 1027 states and 3295 transitions. Word has length 25 [2021-06-05 22:16:52,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:52,801 INFO L482 AbstractCegarLoop]: Abstraction has 1027 states and 3295 transitions. [2021-06-05 22:16:52,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:52,801 INFO L276 IsEmpty]: Start isEmpty. Operand 1027 states and 3295 transitions. [2021-06-05 22:16:52,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:16:52,802 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:52,802 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:53,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 402 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9150 [2021-06-05 22:16:53,002 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:53,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:53,003 INFO L82 PathProgramCache]: Analyzing trace with hash 561294408, now seen corresponding path program 401 times [2021-06-05 22:16:53,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:53,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860188469] [2021-06-05 22:16:53,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:53,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:53,087 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 22:16:53,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:53,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860188469] [2021-06-05 22:16:53,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860188469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:53,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085816468] [2021-06-05 22:16:53,088 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:53,217 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:16:53,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:53,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:16:53,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:53,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:53,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:53,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:16:53,512 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:53,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:16:53,516 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:53,648 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-06-05 22:16:53,648 INFO L628 ElimStorePlain]: treesize reduction 35, result has 79.2 percent of original size [2021-06-05 22:16:53,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:16:53,652 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:53,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:16:53,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:16:53,716 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:53,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:16:53,720 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:53,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:16:53,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:16:53,781 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:53,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:16:53,785 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:53,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:16:53,842 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-06-05 22:16:53,842 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 8 variables, input treesize:199, output treesize:114 [2021-06-05 22:16:54,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:16:54,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:54,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:54,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:16:54,121 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:54,201 INFO L628 ElimStorePlain]: treesize reduction 78, result has 46.2 percent of original size [2021-06-05 22:16:54,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:16:54,205 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:54,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:16:54,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:16:54,238 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:54,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:16:54,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:16:54,292 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:54,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:16:54,319 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:16:54,320 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:157, output treesize:25 [2021-06-05 22:16:54,405 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:54,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085816468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:54,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:54,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-06-05 22:16:54,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335559230] [2021-06-05 22:16:54,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:16:54,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:54,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:16:54,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:16:54,406 INFO L87 Difference]: Start difference. First operand 1027 states and 3295 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:55,372 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2021-06-05 22:16:55,508 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2021-06-05 22:16:55,711 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 68 [2021-06-05 22:16:55,856 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 69 [2021-06-05 22:16:55,998 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2021-06-05 22:16:56,144 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 54 [2021-06-05 22:16:56,317 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 65 [2021-06-05 22:16:56,465 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 72 [2021-06-05 22:16:56,618 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2021-06-05 22:16:56,764 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 54 [2021-06-05 22:16:56,967 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 54 [2021-06-05 22:16:57,119 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 58 [2021-06-05 22:16:57,306 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2021-06-05 22:16:57,463 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 67 [2021-06-05 22:16:57,665 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 54 [2021-06-05 22:16:57,806 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 50 [2021-06-05 22:16:57,978 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 61 [2021-06-05 22:16:58,123 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 58 [2021-06-05 22:16:58,302 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 70 [2021-06-05 22:16:58,599 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 71 [2021-06-05 22:16:58,740 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 50 [2021-06-05 22:16:58,941 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 61 [2021-06-05 22:16:59,097 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 71 [2021-06-05 22:16:59,551 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 67 [2021-06-05 22:16:59,698 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 66 [2021-06-05 22:16:59,891 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 74 [2021-06-05 22:17:00,524 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 68 [2021-06-05 22:17:00,673 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 66 [2021-06-05 22:17:00,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:00,757 INFO L93 Difference]: Finished difference Result 1975 states and 5843 transitions. [2021-06-05 22:17:00,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 22:17:00,758 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:17:00,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:00,760 INFO L225 Difference]: With dead ends: 1975 [2021-06-05 22:17:00,760 INFO L226 Difference]: Without dead ends: 1756 [2021-06-05 22:17:00,760 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 5872.7ms TimeCoverageRelationStatistics Valid=692, Invalid=3730, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 22:17:00,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1756 states. [2021-06-05 22:17:00,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1756 to 1017. [2021-06-05 22:17:00,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1017 states, 1016 states have (on average 3.2096456692913384) internal successors, (3261), 1016 states have internal predecessors, (3261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:00,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1017 states to 1017 states and 3261 transitions. [2021-06-05 22:17:00,772 INFO L78 Accepts]: Start accepts. Automaton has 1017 states and 3261 transitions. Word has length 25 [2021-06-05 22:17:00,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:00,773 INFO L482 AbstractCegarLoop]: Abstraction has 1017 states and 3261 transitions. [2021-06-05 22:17:00,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:00,773 INFO L276 IsEmpty]: Start isEmpty. Operand 1017 states and 3261 transitions. [2021-06-05 22:17:00,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:17:00,774 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:00,774 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:00,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9178,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:00,974 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:00,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:00,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1910473976, now seen corresponding path program 402 times [2021-06-05 22:17:00,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:00,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76127335] [2021-06-05 22:17:00,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:00,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:01,053 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:17:01,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:01,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76127335] [2021-06-05 22:17:01,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76127335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:01,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740445323] [2021-06-05 22:17:01,053 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:01,183 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:17:01,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:01,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:17:01,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:01,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:17:01,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:01,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:01,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:17:01,552 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:01,666 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-06-05 22:17:01,666 INFO L628 ElimStorePlain]: treesize reduction 29, result has 79.3 percent of original size [2021-06-05 22:17:01,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:17:01,670 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:01,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:01,724 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 5 xjuncts. [2021-06-05 22:17:01,724 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:152, output treesize:100 [2021-06-05 22:17:01,907 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:01,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740445323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:01,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:01,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-06-05 22:17:01,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156931254] [2021-06-05 22:17:01,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:17:01,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:01,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:17:01,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:17:01,908 INFO L87 Difference]: Start difference. First operand 1017 states and 3261 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:03,241 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 74 [2021-06-05 22:17:03,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:03,522 INFO L93 Difference]: Finished difference Result 1594 states and 4846 transitions. [2021-06-05 22:17:03,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:17:03,522 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:17:03,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:03,524 INFO L225 Difference]: With dead ends: 1594 [2021-06-05 22:17:03,524 INFO L226 Difference]: Without dead ends: 1465 [2021-06-05 22:17:03,524 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 1640.4ms TimeCoverageRelationStatistics Valid=227, Invalid=1255, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:17:03,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1465 states. [2021-06-05 22:17:03,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1465 to 1015. [2021-06-05 22:17:03,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1015 states, 1014 states have (on average 3.201183431952663) internal successors, (3246), 1014 states have internal predecessors, (3246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:03,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1015 states to 1015 states and 3246 transitions. [2021-06-05 22:17:03,535 INFO L78 Accepts]: Start accepts. Automaton has 1015 states and 3246 transitions. Word has length 25 [2021-06-05 22:17:03,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:03,535 INFO L482 AbstractCegarLoop]: Abstraction has 1015 states and 3246 transitions. [2021-06-05 22:17:03,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:03,535 INFO L276 IsEmpty]: Start isEmpty. Operand 1015 states and 3246 transitions. [2021-06-05 22:17:03,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:17:03,536 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:03,536 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:03,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 404 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9216 [2021-06-05 22:17:03,736 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:03,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:03,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1516618744, now seen corresponding path program 403 times [2021-06-05 22:17:03,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:03,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468100455] [2021-06-05 22:17:03,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:03,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:03,811 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:17:03,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:03,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468100455] [2021-06-05 22:17:03,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468100455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:03,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900440576] [2021-06-05 22:17:03,812 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:03,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:03,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:17:03,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:04,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:04,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:04,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:17:04,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:04,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:17:04,267 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:04,379 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-06-05 22:17:04,379 INFO L628 ElimStorePlain]: treesize reduction 6, result has 95.1 percent of original size [2021-06-05 22:17:04,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:17:04,383 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:04,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:17:04,387 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:04,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:04,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 5 xjuncts. [2021-06-05 22:17:04,440 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:152, output treesize:100 [2021-06-05 22:17:04,643 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:04,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900440576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:04,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:04,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-06-05 22:17:04,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524040842] [2021-06-05 22:17:04,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:17:04,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:04,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:17:04,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:17:04,644 INFO L87 Difference]: Start difference. First operand 1015 states and 3246 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:06,294 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 78 [2021-06-05 22:17:06,449 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 79 [2021-06-05 22:17:06,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:06,885 INFO L93 Difference]: Finished difference Result 1442 states and 4403 transitions. [2021-06-05 22:17:06,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:17:06,885 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:17:06,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:06,887 INFO L225 Difference]: With dead ends: 1442 [2021-06-05 22:17:06,887 INFO L226 Difference]: Without dead ends: 1293 [2021-06-05 22:17:06,887 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 2164.9ms TimeCoverageRelationStatistics Valid=335, Invalid=1645, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 22:17:06,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1293 states. [2021-06-05 22:17:06,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1293 to 1015. [2021-06-05 22:17:06,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1015 states, 1014 states have (on average 3.193293885601578) internal successors, (3238), 1014 states have internal predecessors, (3238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:06,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1015 states to 1015 states and 3238 transitions. [2021-06-05 22:17:06,898 INFO L78 Accepts]: Start accepts. Automaton has 1015 states and 3238 transitions. Word has length 25 [2021-06-05 22:17:06,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:06,898 INFO L482 AbstractCegarLoop]: Abstraction has 1015 states and 3238 transitions. [2021-06-05 22:17:06,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:06,898 INFO L276 IsEmpty]: Start isEmpty. Operand 1015 states and 3238 transitions. [2021-06-05 22:17:06,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:17:06,899 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:06,899 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:07,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9236 [2021-06-05 22:17:07,100 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:07,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:07,100 INFO L82 PathProgramCache]: Analyzing trace with hash 772965990, now seen corresponding path program 404 times [2021-06-05 22:17:07,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:07,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031488329] [2021-06-05 22:17:07,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:07,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:07,183 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:07,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:07,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031488329] [2021-06-05 22:17:07,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031488329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:07,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907108330] [2021-06-05 22:17:07,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:07,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:17:07,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:07,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 22:17:07,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:07,639 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:07,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907108330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:07,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:07,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 22:17:07,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268652451] [2021-06-05 22:17:07,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:17:07,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:07,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:17:07,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:17:07,640 INFO L87 Difference]: Start difference. First operand 1015 states and 3238 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:09,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:09,625 INFO L93 Difference]: Finished difference Result 1664 states and 5107 transitions. [2021-06-05 22:17:09,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 22:17:09,625 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:17:09,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:09,627 INFO L225 Difference]: With dead ends: 1664 [2021-06-05 22:17:09,627 INFO L226 Difference]: Without dead ends: 1584 [2021-06-05 22:17:09,627 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1477 ImplicationChecksByTransitivity, 1231.6ms TimeCoverageRelationStatistics Valid=501, Invalid=4329, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 22:17:09,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1584 states. [2021-06-05 22:17:09,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1584 to 996. [2021-06-05 22:17:09,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 995 states have (on average 3.191959798994975) internal successors, (3176), 995 states have internal predecessors, (3176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:09,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 3176 transitions. [2021-06-05 22:17:09,639 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 3176 transitions. Word has length 25 [2021-06-05 22:17:09,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:09,639 INFO L482 AbstractCegarLoop]: Abstraction has 996 states and 3176 transitions. [2021-06-05 22:17:09,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:09,639 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 3176 transitions. [2021-06-05 22:17:09,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:17:09,640 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:09,640 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:09,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 406 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9259 [2021-06-05 22:17:09,841 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:09,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:09,841 INFO L82 PathProgramCache]: Analyzing trace with hash -499967718, now seen corresponding path program 405 times [2021-06-05 22:17:09,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:09,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837956465] [2021-06-05 22:17:09,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:09,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:09,933 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:09,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:09,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837956465] [2021-06-05 22:17:09,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837956465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:09,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360095639] [2021-06-05 22:17:09,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:10,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:17:10,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:10,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 22:17:10,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:10,370 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:10,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360095639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:10,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:10,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 22:17:10,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774072106] [2021-06-05 22:17:10,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:17:10,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:10,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:17:10,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:17:10,371 INFO L87 Difference]: Start difference. First operand 996 states and 3176 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:12,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:12,411 INFO L93 Difference]: Finished difference Result 1708 states and 5268 transitions. [2021-06-05 22:17:12,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 22:17:12,411 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:17:12,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:12,413 INFO L225 Difference]: With dead ends: 1708 [2021-06-05 22:17:12,413 INFO L226 Difference]: Without dead ends: 1628 [2021-06-05 22:17:12,414 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1508 ImplicationChecksByTransitivity, 1298.3ms TimeCoverageRelationStatistics Valid=555, Invalid=4415, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 22:17:12,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1628 states. [2021-06-05 22:17:12,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1628 to 972. [2021-06-05 22:17:12,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 971 states have (on average 3.194644696189495) internal successors, (3102), 971 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:12,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 3102 transitions. [2021-06-05 22:17:12,426 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 3102 transitions. Word has length 25 [2021-06-05 22:17:12,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:12,426 INFO L482 AbstractCegarLoop]: Abstraction has 972 states and 3102 transitions. [2021-06-05 22:17:12,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:12,426 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 3102 transitions. [2021-06-05 22:17:12,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:17:12,427 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:12,427 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:12,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9266 [2021-06-05 22:17:12,627 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:12,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:12,628 INFO L82 PathProgramCache]: Analyzing trace with hash 438157004, now seen corresponding path program 406 times [2021-06-05 22:17:12,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:12,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591751829] [2021-06-05 22:17:12,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:12,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:12,704 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:12,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:12,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591751829] [2021-06-05 22:17:12,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591751829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:12,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848663969] [2021-06-05 22:17:12,704 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:12,836 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:17:12,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:12,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 22:17:12,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:13,132 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:13,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848663969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:13,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:13,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 22:17:13,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300284078] [2021-06-05 22:17:13,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:17:13,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:13,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:17:13,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:17:13,133 INFO L87 Difference]: Start difference. First operand 972 states and 3102 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:14,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:14,938 INFO L93 Difference]: Finished difference Result 1607 states and 4889 transitions. [2021-06-05 22:17:14,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 22:17:14,938 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:17:14,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:14,940 INFO L225 Difference]: With dead ends: 1607 [2021-06-05 22:17:14,940 INFO L226 Difference]: Without dead ends: 1527 [2021-06-05 22:17:14,940 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1570 ImplicationChecksByTransitivity, 1106.3ms TimeCoverageRelationStatistics Valid=589, Invalid=4667, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 22:17:14,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1527 states. [2021-06-05 22:17:14,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1527 to 850. [2021-06-05 22:17:14,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 849 states have (on average 3.1590106007067136) internal successors, (2682), 849 states have internal predecessors, (2682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:14,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 2682 transitions. [2021-06-05 22:17:14,951 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 2682 transitions. Word has length 25 [2021-06-05 22:17:14,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:14,951 INFO L482 AbstractCegarLoop]: Abstraction has 850 states and 2682 transitions. [2021-06-05 22:17:14,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:14,951 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 2682 transitions. [2021-06-05 22:17:14,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:17:14,952 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:14,952 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:15,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9273,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:15,152 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:15,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:15,152 INFO L82 PathProgramCache]: Analyzing trace with hash -291107904, now seen corresponding path program 407 times [2021-06-05 22:17:15,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:15,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119377345] [2021-06-05 22:17:15,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:15,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:15,235 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:17:15,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:15,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119377345] [2021-06-05 22:17:15,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119377345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:15,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242259876] [2021-06-05 22:17:15,235 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:15,367 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:17:15,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:15,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:17:15,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:15,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:15,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:15,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:17:15,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:15,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:17:15,682 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:15,813 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2021-06-05 22:17:15,813 INFO L628 ElimStorePlain]: treesize reduction 36, result has 78.7 percent of original size [2021-06-05 22:17:15,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:17:15,817 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:15,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:15,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:17:15,881 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:15,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:17:15,884 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:15,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:15,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:17:15,944 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:15,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:17:15,948 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:16,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:16,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-06-05 22:17:16,005 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 8 variables, input treesize:199, output treesize:114 [2021-06-05 22:17:16,240 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:16,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242259876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:16,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:16,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-06-05 22:17:16,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064341625] [2021-06-05 22:17:16,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:17:16,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:16,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:17:16,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:17:16,241 INFO L87 Difference]: Start difference. First operand 850 states and 2682 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:17,646 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 58 [2021-06-05 22:17:18,226 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 62 [2021-06-05 22:17:18,792 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 61 [2021-06-05 22:17:19,352 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 60 [2021-06-05 22:17:20,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:20,083 INFO L93 Difference]: Finished difference Result 1778 states and 5323 transitions. [2021-06-05 22:17:20,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 22:17:20,083 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:17:20,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:20,085 INFO L225 Difference]: With dead ends: 1778 [2021-06-05 22:17:20,085 INFO L226 Difference]: Without dead ends: 1438 [2021-06-05 22:17:20,085 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 3624.7ms TimeCoverageRelationStatistics Valid=539, Invalid=2653, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 22:17:20,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1438 states. [2021-06-05 22:17:20,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1438 to 848. [2021-06-05 22:17:20,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 847 states have (on average 3.1499409681227863) internal successors, (2668), 847 states have internal predecessors, (2668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:20,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 2668 transitions. [2021-06-05 22:17:20,105 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 2668 transitions. Word has length 25 [2021-06-05 22:17:20,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:20,105 INFO L482 AbstractCegarLoop]: Abstraction has 848 states and 2668 transitions. [2021-06-05 22:17:20,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:20,106 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 2668 transitions. [2021-06-05 22:17:20,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:17:20,106 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:20,106 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:20,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9280,409 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:20,307 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:20,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:20,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1194779832, now seen corresponding path program 408 times [2021-06-05 22:17:20,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:20,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452104382] [2021-06-05 22:17:20,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:20,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:20,391 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 22:17:20,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:20,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452104382] [2021-06-05 22:17:20,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452104382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:20,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638458169] [2021-06-05 22:17:20,392 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:20,524 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:17:20,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:20,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:17:20,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:20,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:20,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:20,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:17:20,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:20,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:17:20,726 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:20,857 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-06-05 22:17:20,858 INFO L628 ElimStorePlain]: treesize reduction 36, result has 78.7 percent of original size [2021-06-05 22:17:20,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:17:20,862 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:20,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:17:20,866 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:20,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:20,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:17:20,929 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:20,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:17:20,933 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:20,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:20,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:17:20,993 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:21,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:21,050 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-06-05 22:17:21,051 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 8 variables, input treesize:199, output treesize:114 [2021-06-05 22:17:21,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:17:21,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:21,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:21,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:17:21,312 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:21,344 INFO L628 ElimStorePlain]: treesize reduction 23, result has 58.9 percent of original size [2021-06-05 22:17:21,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:17:21,347 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:21,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:21,360 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:17:21,360 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:79, output treesize:13 [2021-06-05 22:17:21,413 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:21,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638458169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:21,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:21,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-06-05 22:17:21,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025021366] [2021-06-05 22:17:21,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:17:21,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:21,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:17:21,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:17:21,413 INFO L87 Difference]: Start difference. First operand 848 states and 2668 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:22,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:22,603 INFO L93 Difference]: Finished difference Result 1451 states and 4422 transitions. [2021-06-05 22:17:22,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:17:22,603 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:17:22,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:22,605 INFO L225 Difference]: With dead ends: 1451 [2021-06-05 22:17:22,605 INFO L226 Difference]: Without dead ends: 1313 [2021-06-05 22:17:22,606 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1096.0ms TimeCoverageRelationStatistics Valid=218, Invalid=1188, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:17:22,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2021-06-05 22:17:22,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 828. [2021-06-05 22:17:22,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 827 states have (on average 3.1499395405078596) internal successors, (2605), 827 states have internal predecessors, (2605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:22,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 2605 transitions. [2021-06-05 22:17:22,616 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 2605 transitions. Word has length 25 [2021-06-05 22:17:22,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:22,616 INFO L482 AbstractCegarLoop]: Abstraction has 828 states and 2605 transitions. [2021-06-05 22:17:22,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:22,616 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 2605 transitions. [2021-06-05 22:17:22,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:17:22,617 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:22,617 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:22,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9304 [2021-06-05 22:17:22,817 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:22,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:22,817 INFO L82 PathProgramCache]: Analyzing trace with hash 902879914, now seen corresponding path program 409 times [2021-06-05 22:17:22,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:22,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806649432] [2021-06-05 22:17:22,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:22,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:22,897 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 22:17:22,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:22,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806649432] [2021-06-05 22:17:22,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806649432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:22,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576614014] [2021-06-05 22:17:22,897 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:23,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:23,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:17:23,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:23,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:23,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:23,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:17:23,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:23,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:17:23,224 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:23,360 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-06-05 22:17:23,360 INFO L628 ElimStorePlain]: treesize reduction 59, result has 68.4 percent of original size [2021-06-05 22:17:23,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:17:23,364 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:23,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:23,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:17:23,426 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:23,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:23,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:17:23,487 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:23,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:17:23,490 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:23,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:23,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-06-05 22:17:23,547 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:199, output treesize:114 [2021-06-05 22:17:23,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:17:23,832 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:23,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:23,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:17:23,836 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:23,913 INFO L628 ElimStorePlain]: treesize reduction 65, result has 51.1 percent of original size [2021-06-05 22:17:23,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:17:23,917 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:23,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:23,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:17:23,948 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:23,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:23,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:17:23,979 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:24,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:24,006 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:17:24,006 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:157, output treesize:25 [2021-06-05 22:17:24,090 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:24,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576614014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:24,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:24,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-06-05 22:17:24,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508934262] [2021-06-05 22:17:24,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:17:24,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:24,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:17:24,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:17:24,091 INFO L87 Difference]: Start difference. First operand 828 states and 2605 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:26,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:26,490 INFO L93 Difference]: Finished difference Result 1421 states and 4208 transitions. [2021-06-05 22:17:26,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:17:26,491 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:17:26,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:26,492 INFO L225 Difference]: With dead ends: 1421 [2021-06-05 22:17:26,492 INFO L226 Difference]: Without dead ends: 1233 [2021-06-05 22:17:26,492 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 2133.9ms TimeCoverageRelationStatistics Valid=272, Invalid=1620, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:17:26,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2021-06-05 22:17:26,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 836. [2021-06-05 22:17:26,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 836 states, 835 states have (on average 3.1580838323353295) internal successors, (2637), 835 states have internal predecessors, (2637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:26,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 2637 transitions. [2021-06-05 22:17:26,501 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 2637 transitions. Word has length 25 [2021-06-05 22:17:26,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:26,502 INFO L482 AbstractCegarLoop]: Abstraction has 836 states and 2637 transitions. [2021-06-05 22:17:26,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:26,502 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 2637 transitions. [2021-06-05 22:17:26,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:17:26,502 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:26,502 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:26,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 411 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9337 [2021-06-05 22:17:26,703 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:26,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:26,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1605652284, now seen corresponding path program 410 times [2021-06-05 22:17:26,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:26,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474732770] [2021-06-05 22:17:26,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:26,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:26,780 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 22:17:26,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:26,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474732770] [2021-06-05 22:17:26,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474732770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:26,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742921124] [2021-06-05 22:17:26,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:26,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:17:26,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:26,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:17:26,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:27,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:27,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:27,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:17:27,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:17:27,190 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,303 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-06-05 22:17:27,304 INFO L628 ElimStorePlain]: treesize reduction 29, result has 79.3 percent of original size [2021-06-05 22:17:27,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:17:27,307 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:27,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 5 xjuncts. [2021-06-05 22:17:27,362 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:152, output treesize:100 [2021-06-05 22:17:27,563 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:27,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742921124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:27,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:27,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-06-05 22:17:27,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747132691] [2021-06-05 22:17:27,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:17:27,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:27,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:17:27,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:17:27,563 INFO L87 Difference]: Start difference. First operand 836 states and 2637 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:29,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:29,273 INFO L93 Difference]: Finished difference Result 1196 states and 3596 transitions. [2021-06-05 22:17:29,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:17:29,273 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:17:29,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:29,275 INFO L225 Difference]: With dead ends: 1196 [2021-06-05 22:17:29,275 INFO L226 Difference]: Without dead ends: 1046 [2021-06-05 22:17:29,275 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 1654.3ms TimeCoverageRelationStatistics Valid=226, Invalid=1414, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:17:29,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1046 states. [2021-06-05 22:17:29,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1046 to 826. [2021-06-05 22:17:29,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 825 states have (on average 3.1515151515151514) internal successors, (2600), 825 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:29,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 2600 transitions. [2021-06-05 22:17:29,283 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 2600 transitions. Word has length 25 [2021-06-05 22:17:29,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:29,283 INFO L482 AbstractCegarLoop]: Abstraction has 826 states and 2600 transitions. [2021-06-05 22:17:29,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:29,284 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 2600 transitions. [2021-06-05 22:17:29,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:17:29,284 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:29,284 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:29,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9374 [2021-06-05 22:17:29,485 INFO L430 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:29,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:29,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1175033238, now seen corresponding path program 411 times [2021-06-05 22:17:29,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:29,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230157981] [2021-06-05 22:17:29,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:29,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:29,556 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:17:29,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:29,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230157981] [2021-06-05 22:17:29,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230157981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:29,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005645087] [2021-06-05 22:17:29,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:29,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:17:29,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:29,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:17:29,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:29,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:17:29,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:29,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:29,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:17:29,932 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:30,044 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-06-05 22:17:30,044 INFO L628 ElimStorePlain]: treesize reduction 6, result has 95.1 percent of original size [2021-06-05 22:17:30,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:17:30,048 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:30,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:17:30,052 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:30,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:30,106 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 5 xjuncts. [2021-06-05 22:17:30,106 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:152, output treesize:100 [2021-06-05 22:17:30,306 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:30,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005645087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:30,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:30,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-06-05 22:17:30,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080588189] [2021-06-05 22:17:30,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:17:30,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:30,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:17:30,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:17:30,306 INFO L87 Difference]: Start difference. First operand 826 states and 2600 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:31,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:31,446 INFO L93 Difference]: Finished difference Result 1043 states and 3193 transitions. [2021-06-05 22:17:31,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:17:31,446 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:17:31,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:31,447 INFO L225 Difference]: With dead ends: 1043 [2021-06-05 22:17:31,447 INFO L226 Difference]: Without dead ends: 894 [2021-06-05 22:17:31,447 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1119.3ms TimeCoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:17:31,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2021-06-05 22:17:31,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 803. [2021-06-05 22:17:31,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 802 states have (on average 3.1546134663341645) internal successors, (2530), 802 states have internal predecessors, (2530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:31,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 2530 transitions. [2021-06-05 22:17:31,455 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 2530 transitions. Word has length 25 [2021-06-05 22:17:31,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:31,455 INFO L482 AbstractCegarLoop]: Abstraction has 803 states and 2530 transitions. [2021-06-05 22:17:31,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:31,455 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 2530 transitions. [2021-06-05 22:17:31,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:17:31,456 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:31,456 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:31,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9395,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:31,656 INFO L430 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:31,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:31,656 INFO L82 PathProgramCache]: Analyzing trace with hash -171956220, now seen corresponding path program 412 times [2021-06-05 22:17:31,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:31,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280052535] [2021-06-05 22:17:31,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:31,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:31,752 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:17:31,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:31,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280052535] [2021-06-05 22:17:31,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280052535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:31,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118070107] [2021-06-05 22:17:31,753 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:31,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:17:31,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:31,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:17:31,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:32,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:32,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:32,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:17:32,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:32,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:17:32,019 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:32,118 INFO L628 ElimStorePlain]: treesize reduction 26, result has 78.7 percent of original size [2021-06-05 22:17:32,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:17:32,122 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:32,168 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:32,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 5 xjuncts. [2021-06-05 22:17:32,170 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:134, output treesize:85 [2021-06-05 22:17:32,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:32,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:32,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:17:32,402 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:32,403 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:32,404 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:32,434 INFO L628 ElimStorePlain]: treesize reduction 20, result has 61.5 percent of original size [2021-06-05 22:17:32,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:17:32,437 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:32,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:32,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:17:32,450 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:79, output treesize:13 [2021-06-05 22:17:32,501 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:32,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118070107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:32,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:32,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-05 22:17:32,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411068815] [2021-06-05 22:17:32,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:17:32,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:32,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:17:32,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:17:32,502 INFO L87 Difference]: Start difference. First operand 803 states and 2530 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:33,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:33,543 INFO L93 Difference]: Finished difference Result 1281 states and 3847 transitions. [2021-06-05 22:17:33,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:17:33,544 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:17:33,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:33,545 INFO L225 Difference]: With dead ends: 1281 [2021-06-05 22:17:33,545 INFO L226 Difference]: Without dead ends: 1143 [2021-06-05 22:17:33,545 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 942.1ms TimeCoverageRelationStatistics Valid=223, Invalid=1037, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:17:33,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2021-06-05 22:17:33,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 787. [2021-06-05 22:17:33,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 786 states have (on average 3.127226463104326) internal successors, (2458), 786 states have internal predecessors, (2458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:33,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 2458 transitions. [2021-06-05 22:17:33,554 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 2458 transitions. Word has length 25 [2021-06-05 22:17:33,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:33,554 INFO L482 AbstractCegarLoop]: Abstraction has 787 states and 2458 transitions. [2021-06-05 22:17:33,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:33,554 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 2458 transitions. [2021-06-05 22:17:33,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:17:33,554 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:33,555 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:33,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9419 [2021-06-05 22:17:33,755 INFO L430 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:33,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:33,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1513281842, now seen corresponding path program 413 times [2021-06-05 22:17:33,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:33,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538344839] [2021-06-05 22:17:33,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:33,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:33,846 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:17:33,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:33,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538344839] [2021-06-05 22:17:33,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538344839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:33,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955124307] [2021-06-05 22:17:33,846 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:33,988 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:17:33,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:33,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:17:33,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:34,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:34,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:34,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:17:34,118 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:34,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:17:34,122 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:34,256 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2021-06-05 22:17:34,256 INFO L628 ElimStorePlain]: treesize reduction 36, result has 78.7 percent of original size [2021-06-05 22:17:34,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:17:34,260 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:34,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:17:34,264 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:34,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:34,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:17:34,328 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:34,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:17:34,331 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:34,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:34,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:17:34,391 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:34,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:34,449 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-06-05 22:17:34,449 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 8 variables, input treesize:199, output treesize:114 [2021-06-05 22:17:34,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:17:34,712 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:34,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:34,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:17:34,716 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:34,791 INFO L628 ElimStorePlain]: treesize reduction 65, result has 51.1 percent of original size [2021-06-05 22:17:34,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:17:34,795 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:34,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:34,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:17:34,826 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:34,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:34,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:17:34,856 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:34,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:34,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:17:34,883 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:157, output treesize:25 [2021-06-05 22:17:34,961 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:34,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955124307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:34,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:34,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-05 22:17:34,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209909853] [2021-06-05 22:17:34,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:17:34,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:34,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:17:34,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:17:34,962 INFO L87 Difference]: Start difference. First operand 787 states and 2458 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:37,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:37,291 INFO L93 Difference]: Finished difference Result 1327 states and 3926 transitions. [2021-06-05 22:17:37,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:17:37,291 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:17:37,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:37,293 INFO L225 Difference]: With dead ends: 1327 [2021-06-05 22:17:37,293 INFO L226 Difference]: Without dead ends: 1139 [2021-06-05 22:17:37,293 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 2085.9ms TimeCoverageRelationStatistics Valid=311, Invalid=1759, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 22:17:37,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2021-06-05 22:17:37,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 785. [2021-06-05 22:17:37,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 3.128826530612245) internal successors, (2453), 784 states have internal predecessors, (2453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:37,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 2453 transitions. [2021-06-05 22:17:37,302 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 2453 transitions. Word has length 25 [2021-06-05 22:17:37,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:37,302 INFO L482 AbstractCegarLoop]: Abstraction has 785 states and 2453 transitions. [2021-06-05 22:17:37,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:37,302 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 2453 transitions. [2021-06-05 22:17:37,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:17:37,303 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:37,303 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:37,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9451 [2021-06-05 22:17:37,503 INFO L430 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:37,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:37,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1432505886, now seen corresponding path program 414 times [2021-06-05 22:17:37,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:37,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519554409] [2021-06-05 22:17:37,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:37,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:37,593 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:17:37,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:37,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519554409] [2021-06-05 22:17:37,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519554409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:37,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409834515] [2021-06-05 22:17:37,594 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:37,729 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:17:37,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:37,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:17:37,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:37,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:17:37,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:38,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:17:38,003 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,152 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-06-05 22:17:38,153 INFO L628 ElimStorePlain]: treesize reduction 38, result has 79.9 percent of original size [2021-06-05 22:17:38,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:17:38,157 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:17:38,161 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:38,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:17:38,232 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:38,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:17:38,300 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:17:38,304 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:38,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-06-05 22:17:38,372 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 8 variables, input treesize:223, output treesize:132 [2021-06-05 22:17:38,560 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:38,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409834515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:38,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:38,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-05 22:17:38,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016368068] [2021-06-05 22:17:38,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:17:38,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:38,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:17:38,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:17:38,561 INFO L87 Difference]: Start difference. First operand 785 states and 2453 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:39,333 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2021-06-05 22:17:39,658 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2021-06-05 22:17:39,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:39,852 INFO L93 Difference]: Finished difference Result 969 states and 2958 transitions. [2021-06-05 22:17:39,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:17:39,853 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:17:39,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:39,853 INFO L225 Difference]: With dead ends: 969 [2021-06-05 22:17:39,854 INFO L226 Difference]: Without dead ends: 828 [2021-06-05 22:17:39,854 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1351.2ms TimeCoverageRelationStatistics Valid=166, Invalid=890, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:17:39,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2021-06-05 22:17:39,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 723. [2021-06-05 22:17:39,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 722 states have (on average 3.149584487534626) internal successors, (2274), 722 states have internal predecessors, (2274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:39,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 2274 transitions. [2021-06-05 22:17:39,860 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 2274 transitions. Word has length 25 [2021-06-05 22:17:39,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:39,861 INFO L482 AbstractCegarLoop]: Abstraction has 723 states and 2274 transitions. [2021-06-05 22:17:39,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:39,861 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 2274 transitions. [2021-06-05 22:17:39,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:17:39,861 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:39,861 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:40,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9487,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:40,062 INFO L430 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:40,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:40,062 INFO L82 PathProgramCache]: Analyzing trace with hash 993588152, now seen corresponding path program 415 times [2021-06-05 22:17:40,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:40,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423782673] [2021-06-05 22:17:40,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:40,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:40,154 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:17:40,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:40,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423782673] [2021-06-05 22:17:40,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423782673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:40,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066708742] [2021-06-05 22:17:40,154 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:40,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:40,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:17:40,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:40,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:40,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:40,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:17:40,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:40,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:40,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:40,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:17:40,424 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:40,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:17:40,427 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:40,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:40,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:40,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:17:40,431 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:40,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:17:40,434 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:40,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:17:40,437 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:40,440 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:40,440 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:40,442 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:40,443 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:40,509 INFO L628 ElimStorePlain]: treesize reduction 23, result has 76.3 percent of original size [2021-06-05 22:17:40,511 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 22:17:40,511 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 2 variables, input treesize:199, output treesize:66 [2021-06-05 22:17:40,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:40,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:40,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:17:40,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:40,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:17:40,723 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:40,755 INFO L628 ElimStorePlain]: treesize reduction 23, result has 58.9 percent of original size [2021-06-05 22:17:40,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:17:40,758 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:40,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:40,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:17:40,771 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:79, output treesize:13 [2021-06-05 22:17:40,818 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:40,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066708742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:40,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:40,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-05 22:17:40,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328532813] [2021-06-05 22:17:40,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:17:40,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:40,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:17:40,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:17:40,819 INFO L87 Difference]: Start difference. First operand 723 states and 2274 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:41,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:41,740 INFO L93 Difference]: Finished difference Result 1403 states and 4198 transitions. [2021-06-05 22:17:41,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:17:41,740 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:17:41,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:41,742 INFO L225 Difference]: With dead ends: 1403 [2021-06-05 22:17:41,742 INFO L226 Difference]: Without dead ends: 1265 [2021-06-05 22:17:41,742 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 816.7ms TimeCoverageRelationStatistics Valid=210, Invalid=980, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:17:41,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2021-06-05 22:17:41,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 749. [2021-06-05 22:17:41,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 3.18048128342246) internal successors, (2379), 748 states have internal predecessors, (2379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:41,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2379 transitions. [2021-06-05 22:17:41,750 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2379 transitions. Word has length 25 [2021-06-05 22:17:41,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:41,750 INFO L482 AbstractCegarLoop]: Abstraction has 749 states and 2379 transitions. [2021-06-05 22:17:41,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:41,750 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2379 transitions. [2021-06-05 22:17:41,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:17:41,751 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:41,751 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:41,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 417 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9510 [2021-06-05 22:17:41,952 INFO L430 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:41,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:41,952 INFO L82 PathProgramCache]: Analyzing trace with hash 701688234, now seen corresponding path program 416 times [2021-06-05 22:17:41,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:41,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92734840] [2021-06-05 22:17:41,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:41,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:42,044 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:17:42,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:42,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92734840] [2021-06-05 22:17:42,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92734840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:42,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051269800] [2021-06-05 22:17:42,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:42,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:17:42,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:42,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:17:42,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:42,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:42,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:42,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:17:42,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:42,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:17:42,358 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:42,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:17:42,361 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:42,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:42,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:42,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:17:42,366 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:42,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:42,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:42,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:17:42,370 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:42,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:17:42,373 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:42,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:42,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:42,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:17:42,377 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:42,379 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:42,380 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:42,445 INFO L628 ElimStorePlain]: treesize reduction 23, result has 76.3 percent of original size [2021-06-05 22:17:42,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 22:17:42,447 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 2 variables, input treesize:199, output treesize:66 [2021-06-05 22:17:42,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:42,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:42,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:17:42,660 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:42,663 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:42,663 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:42,721 INFO L628 ElimStorePlain]: treesize reduction 42, result has 56.7 percent of original size [2021-06-05 22:17:42,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:17:42,725 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:42,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:42,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:17:42,751 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:42,772 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:42,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:17:42,773 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:124, output treesize:24 [2021-06-05 22:17:42,847 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:42,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051269800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:42,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:42,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-05 22:17:42,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346173693] [2021-06-05 22:17:42,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:17:42,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:42,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:17:42,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:17:42,848 INFO L87 Difference]: Start difference. First operand 749 states and 2379 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:44,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:44,499 INFO L93 Difference]: Finished difference Result 1358 states and 4055 transitions. [2021-06-05 22:17:44,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:17:44,500 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:17:44,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:44,501 INFO L225 Difference]: With dead ends: 1358 [2021-06-05 22:17:44,501 INFO L226 Difference]: Without dead ends: 1170 [2021-06-05 22:17:44,501 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1404.4ms TimeCoverageRelationStatistics Valid=238, Invalid=1244, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:17:44,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2021-06-05 22:17:44,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 772. [2021-06-05 22:17:44,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.1647211413748377) internal successors, (2440), 771 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:44,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2440 transitions. [2021-06-05 22:17:44,510 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2440 transitions. Word has length 25 [2021-06-05 22:17:44,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:44,510 INFO L482 AbstractCegarLoop]: Abstraction has 772 states and 2440 transitions. [2021-06-05 22:17:44,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:44,510 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2440 transitions. [2021-06-05 22:17:44,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:17:44,511 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:44,511 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:44,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9563,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:44,711 INFO L430 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:44,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:44,711 INFO L82 PathProgramCache]: Analyzing trace with hash -140970944, now seen corresponding path program 417 times [2021-06-05 22:17:44,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:44,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130472916] [2021-06-05 22:17:44,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:44,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:44,796 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:17:44,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:44,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130472916] [2021-06-05 22:17:44,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130472916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:44,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961922374] [2021-06-05 22:17:44,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:44,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:17:44,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:44,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:17:44,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:45,171 INFO L446 ElimStorePlain]: Different costs {0=[ends_with_2, v_prenex_469], 1=[ends_with_6]} [2021-06-05 22:17:45,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:17:45,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:45,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:17:45,178 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:45,180 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:45,181 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:45,217 INFO L628 ElimStorePlain]: treesize reduction 35, result has 53.3 percent of original size [2021-06-05 22:17:45,218 INFO L518 ElimStorePlain]: Eliminatee v_prenex_469 vanished before elimination [2021-06-05 22:17:45,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:17:45,221 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:45,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:17:45,223 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:45,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:45,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:17:45,236 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:111, output treesize:16 [2021-06-05 22:17:45,283 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 22:17:45,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961922374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:45,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:45,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2021-06-05 22:17:45,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649080491] [2021-06-05 22:17:45,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:17:45,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:45,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:17:45,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:17:45,284 INFO L87 Difference]: Start difference. First operand 772 states and 2440 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:45,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:45,500 INFO L93 Difference]: Finished difference Result 1021 states and 3122 transitions. [2021-06-05 22:17:45,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:17:45,500 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:17:45,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:45,501 INFO L225 Difference]: With dead ends: 1021 [2021-06-05 22:17:45,501 INFO L226 Difference]: Without dead ends: 944 [2021-06-05 22:17:45,502 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 236.1ms TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:17:45,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2021-06-05 22:17:45,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 737. [2021-06-05 22:17:45,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 3.150815217391304) internal successors, (2319), 736 states have internal predecessors, (2319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:45,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 2319 transitions. [2021-06-05 22:17:45,509 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 2319 transitions. Word has length 25 [2021-06-05 22:17:45,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:45,509 INFO L482 AbstractCegarLoop]: Abstraction has 737 states and 2319 transitions. [2021-06-05 22:17:45,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:45,509 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 2319 transitions. [2021-06-05 22:17:45,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:17:45,510 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:45,510 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:45,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9628 [2021-06-05 22:17:45,710 INFO L430 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:45,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:45,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1392871288, now seen corresponding path program 418 times [2021-06-05 22:17:45,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:45,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718306633] [2021-06-05 22:17:45,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:45,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:45,790 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 22:17:45,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:45,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718306633] [2021-06-05 22:17:45,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718306633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:45,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529827810] [2021-06-05 22:17:45,790 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:45,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:17:45,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:45,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:17:45,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:46,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:46,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:46,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 22:17:46,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:46,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:17:46,102 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:46,201 INFO L628 ElimStorePlain]: treesize reduction 26, result has 78.7 percent of original size [2021-06-05 22:17:46,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:17:46,205 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:46,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:46,251 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 5 xjuncts. [2021-06-05 22:17:46,251 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:134, output treesize:85 [2021-06-05 22:17:46,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:46,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:46,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 22:17:46,498 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:46,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 22:17:46,502 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:46,562 INFO L628 ElimStorePlain]: treesize reduction 45, result has 55.4 percent of original size [2021-06-05 22:17:46,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:17:46,566 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:46,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:46,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 22:17:46,592 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:46,613 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:46,614 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:17:46,614 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:124, output treesize:24 [2021-06-05 22:17:46,697 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:46,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529827810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:46,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:46,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-06-05 22:17:46,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20591597] [2021-06-05 22:17:46,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:17:46,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:46,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:17:46,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:17:46,698 INFO L87 Difference]: Start difference. First operand 737 states and 2319 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:49,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:49,656 INFO L93 Difference]: Finished difference Result 1363 states and 4012 transitions. [2021-06-05 22:17:49,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:17:49,656 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:17:49,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:49,658 INFO L225 Difference]: With dead ends: 1363 [2021-06-05 22:17:49,658 INFO L226 Difference]: Without dead ends: 1152 [2021-06-05 22:17:49,658 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 2569.5ms TimeCoverageRelationStatistics Valid=311, Invalid=1945, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 22:17:49,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1152 states. [2021-06-05 22:17:49,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1152 to 727. [2021-06-05 22:17:49,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 726 states have (on average 3.1349862258953167) internal successors, (2276), 726 states have internal predecessors, (2276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:49,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 2276 transitions. [2021-06-05 22:17:49,666 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 2276 transitions. Word has length 25 [2021-06-05 22:17:49,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:49,666 INFO L482 AbstractCegarLoop]: Abstraction has 727 states and 2276 transitions. [2021-06-05 22:17:49,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:49,666 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 2276 transitions. [2021-06-05 22:17:49,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:17:49,667 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:49,667 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:49,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 420 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9682 [2021-06-05 22:17:49,867 INFO L430 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:49,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:49,867 INFO L82 PathProgramCache]: Analyzing trace with hash -378991928, now seen corresponding path program 419 times [2021-06-05 22:17:49,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:49,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286427565] [2021-06-05 22:17:49,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:49,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:49,971 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:17:49,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:49,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286427565] [2021-06-05 22:17:49,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286427565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:49,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715023836] [2021-06-05 22:17:49,971 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:50,106 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:17:50,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:50,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 22:17:50,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2021-06-05 22:17:50,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9714,421 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:50,508 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 22:17:50,510 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 22:17:50,511 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 22:17:50,511 INFO L202 PluginConnector]: Adding new model nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 10:17:50 BasicIcfg [2021-06-05 22:17:50,511 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 22:17:50,512 INFO L168 Benchmark]: Toolchain (without parser) took 771915.60 ms. Allocated memory was 371.2 MB in the beginning and 775.9 MB in the end (delta: 404.8 MB). Free memory was 350.1 MB in the beginning and 470.9 MB in the end (delta: -120.8 MB). Peak memory consumption was 285.7 MB. Max. memory is 16.0 GB. [2021-06-05 22:17:50,512 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 371.2 MB. Free memory was 351.6 MB in the beginning and 351.5 MB in the end (delta: 65.5 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 22:17:50,512 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.16 ms. Allocated memory is still 371.2 MB. Free memory was 350.0 MB in the beginning and 348.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 22:17:50,512 INFO L168 Benchmark]: Boogie Preprocessor took 19.02 ms. Allocated memory is still 371.2 MB. Free memory was 348.5 MB in the beginning and 347.4 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 22:17:50,512 INFO L168 Benchmark]: RCFGBuilder took 507.48 ms. Allocated memory is still 371.2 MB. Free memory was 347.3 MB in the beginning and 337.4 MB in the end (delta: 10.0 MB). Peak memory consumption was 21.9 MB. Max. memory is 16.0 GB. [2021-06-05 22:17:50,512 INFO L168 Benchmark]: TraceAbstraction took 771357.40 ms. Allocated memory was 371.2 MB in the beginning and 775.9 MB in the end (delta: 404.8 MB). Free memory was 337.4 MB in the beginning and 470.9 MB in the end (delta: -133.6 MB). Peak memory consumption was 272.2 MB. Max. memory is 16.0 GB. [2021-06-05 22:17:50,512 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 371.2 MB. Free memory was 351.6 MB in the beginning and 351.5 MB in the end (delta: 65.5 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 27.16 ms. Allocated memory is still 371.2 MB. Free memory was 350.0 MB in the beginning and 348.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 19.02 ms. Allocated memory is still 371.2 MB. Free memory was 348.5 MB in the beginning and 347.4 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 507.48 ms. Allocated memory is still 371.2 MB. Free memory was 347.3 MB in the beginning and 337.4 MB in the end (delta: 10.0 MB). Peak memory consumption was 21.9 MB. Max. memory is 16.0 GB. * TraceAbstraction took 771357.40 ms. Allocated memory was 371.2 MB in the beginning and 775.9 MB in the end (delta: 404.8 MB). Free memory was 337.4 MB in the beginning and 470.9 MB in the end (delta: -133.6 MB). Peak memory consumption was 272.2 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 143]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 26 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while QuantifierPusher was running 1 iterations of DualJunctionQuantifierElimination. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 38 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 771240.7ms, OverallIterations: 436, TraceHistogramMax: 3, EmptinessCheckTime: 432.2ms, AutomataDifference: 462638.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 36.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 40239 SDtfs, 61419 SDslu, 297730 SDs, 0 SdLazy, 295915 SolverSat, 15175 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 123657.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 26058 GetRequests, 10758 SyntacticMatches, 357 SemanticMatches, 14943 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199910 ImplicationChecksByTransitivity, 388638.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1764occurred in iteration=303, InterpolantAutomatonStates: 12055, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 4277.7ms AutomataMinimizationTime, 435 MinimizatonAttempts, 155975 StatesRemovedByMinimization, 431 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2804.2ms SsaConstructionTime, 6803.4ms SatisfiabilityAnalysisTime, 176393.0ms InterpolantComputationTime, 19405 NumberOfCodeBlocks, 19390 NumberOfCodeBlocksAsserted, 1391 NumberOfCheckSat, 18551 ConstructedInterpolants, 760 QuantifiedInterpolants, 161463 SizeOfPredicates, 2451 NumberOfNonLiveVariables, 45887 ConjunctsInSsa, 8435 ConjunctsInUnsatCore, 854 InterpolantComputations, 16 PerfectInterpolantSequences, 1896/7767 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown