/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-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/simple-array-sum.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 15:44:09,078 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 15:44:09,081 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 15:44:09,117 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 15:44:09,168 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 15:44:09,169 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 15:44:09,169 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 15:44:09,173 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-Separate.epf [2021-06-05 15:44:09,208 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 15:44:09,208 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 15:44:09,208 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 15:44:09,208 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 15:44:09,210 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 15:44:09,211 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 15:44:09,211 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 15:44:09,211 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 15:44:09,211 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 15:44:09,211 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 15:44:09,212 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 15:44:09,212 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 15:44:09,212 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 15:44:09,212 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 15:44:09,212 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 15:44:09,213 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 15:44:09,213 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 15:44:09,213 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 15:44:09,213 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 15:44:09,213 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 15:44:09,213 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 15:44:09,213 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 15:44:09,213 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 15:44:09,213 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 15:44:09,214 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 15:44:09,214 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 15:44:09,214 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 15:44:09,214 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 15:44:09,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 15:44:09,214 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 15:44:09,214 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 15:44:09,214 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 15:44:09,215 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 15:44:09,511 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 15:44:09,535 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 15:44:09,537 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 15:44:09,538 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 15:44:09,539 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 15:44:09,540 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/simple-array-sum.wvr.bpl [2021-06-05 15:44:09,540 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/simple-array-sum.wvr.bpl' [2021-06-05 15:44:09,579 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 15:44:09,581 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 15:44:09,582 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 15:44:09,582 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 15:44:09,582 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 15:44:09,591 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:44:09" (1/1) ... [2021-06-05 15:44:09,597 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:44:09" (1/1) ... [2021-06-05 15:44:09,603 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 15:44:09,605 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 15:44:09,605 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 15:44:09,606 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 15:44:09,612 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:44:09" (1/1) ... [2021-06-05 15:44:09,612 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:44:09" (1/1) ... [2021-06-05 15:44:09,613 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:44:09" (1/1) ... [2021-06-05 15:44:09,614 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:44:09" (1/1) ... [2021-06-05 15:44:09,618 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:44:09" (1/1) ... [2021-06-05 15:44:09,621 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:44:09" (1/1) ... [2021-06-05 15:44:09,622 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:44:09" (1/1) ... [2021-06-05 15:44:09,623 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 15:44:09,624 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 15:44:09,624 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 15:44:09,624 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 15:44:09,625 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:44:09" (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 15:44:09,679 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 15:44:09,679 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 15:44:09,679 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 15:44:09,679 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 15:44:09,679 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 15:44:09,680 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 15:44:09,680 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 15:44:09,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 15:44:09,680 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 15:44:09,680 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 15:44:09,680 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 15:44:09,680 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 15:44:09,681 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 15:44:09,926 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 15:44:09,926 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 15:44:09,928 INFO L202 PluginConnector]: Adding new model simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:44:09 BoogieIcfgContainer [2021-06-05 15:44:09,928 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 15:44:09,929 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 15:44:09,929 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 15:44:09,931 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 15:44:09,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:44:09" (1/2) ... [2021-06-05 15:44:09,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f6fee2 and model type simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 03:44:09, skipping insertion in model container [2021-06-05 15:44:09,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:44:09" (2/2) ... [2021-06-05 15:44:09,934 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-array-sum.wvr.bpl [2021-06-05 15:44:09,938 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 15:44:09,939 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 15:44:09,939 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 15:44:09,939 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 15:44:09,972 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 15:44:10,002 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 15:44:10,018 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 15:44:10,018 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 15:44:10,018 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 15:44:10,019 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 15:44:10,019 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 15:44:10,019 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 15:44:10,019 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 15:44:10,019 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 15:44:10,026 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 35 places, 29 transitions, 82 flow [2021-06-05 15:44:10,065 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 133 states, 131 states have (on average 3.015267175572519) internal successors, (395), 132 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:10,067 INFO L276 IsEmpty]: Start isEmpty. Operand has 133 states, 131 states have (on average 3.015267175572519) internal successors, (395), 132 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:10,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 15:44:10,084 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:10,085 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:10,085 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:10,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:10,089 INFO L82 PathProgramCache]: Analyzing trace with hash -514212460, now seen corresponding path program 1 times [2021-06-05 15:44:10,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:10,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093301030] [2021-06-05 15:44:10,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:10,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:10,474 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 15:44:10,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:10,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093301030] [2021-06-05 15:44:10,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093301030] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:44:10,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:44:10,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 15:44:10,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553612327] [2021-06-05 15:44:10,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 15:44:10,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:10,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 15:44:10,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:44:10,492 INFO L87 Difference]: Start difference. First operand has 133 states, 131 states have (on average 3.015267175572519) internal successors, (395), 132 states have internal predecessors, (395), 0 states have call successors, (0), 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 3.2) 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 15:44:10,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:10,596 INFO L93 Difference]: Finished difference Result 257 states and 781 transitions. [2021-06-05 15:44:10,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 15:44:10,598 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) 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 15:44:10,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:10,608 INFO L225 Difference]: With dead ends: 257 [2021-06-05 15:44:10,608 INFO L226 Difference]: Without dead ends: 230 [2021-06-05 15:44:10,610 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 147.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:44:10,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-06-05 15:44:10,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 188. [2021-06-05 15:44:10,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 3.0802139037433154) internal successors, (576), 187 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:10,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 576 transitions. [2021-06-05 15:44:10,660 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 576 transitions. Word has length 16 [2021-06-05 15:44:10,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:10,660 INFO L482 AbstractCegarLoop]: Abstraction has 188 states and 576 transitions. [2021-06-05 15:44:10,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) 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 15:44:10,661 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 576 transitions. [2021-06-05 15:44:10,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 15:44:10,663 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:10,663 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:10,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 15:44:10,664 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:10,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:10,665 INFO L82 PathProgramCache]: Analyzing trace with hash -610054924, now seen corresponding path program 1 times [2021-06-05 15:44:10,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:10,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346326648] [2021-06-05 15:44:10,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:10,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:10,701 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 15:44:10,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:10,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346326648] [2021-06-05 15:44:10,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346326648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:10,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103200797] [2021-06-05 15:44:10,702 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 15:44:10,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:10,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 15:44:10,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:10,822 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 15:44:10,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103200797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:10,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:10,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-06-05 15:44:10,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552374460] [2021-06-05 15:44:10,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 15:44:10,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:10,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 15:44:10,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:44:10,826 INFO L87 Difference]: Start difference. First operand 188 states and 576 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:10,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:10,927 INFO L93 Difference]: Finished difference Result 376 states and 1113 transitions. [2021-06-05 15:44:10,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 15:44:10,927 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 15:44:10,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:10,933 INFO L225 Difference]: With dead ends: 376 [2021-06-05 15:44:10,933 INFO L226 Difference]: Without dead ends: 376 [2021-06-05 15:44:10,934 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 28.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:44:10,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-06-05 15:44:10,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 181. [2021-06-05 15:44:10,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 3.077777777777778) internal successors, (554), 180 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:10,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 554 transitions. [2021-06-05 15:44:10,973 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 554 transitions. Word has length 18 [2021-06-05 15:44:10,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:10,973 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 554 transitions. [2021-06-05 15:44:10,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:10,973 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 554 transitions. [2021-06-05 15:44:10,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 15:44:10,975 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:10,975 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:11,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 15:44:11,176 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:11,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:11,177 INFO L82 PathProgramCache]: Analyzing trace with hash 814452718, now seen corresponding path program 2 times [2021-06-05 15:44:11,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:11,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983929955] [2021-06-05 15:44:11,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:11,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:11,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:11,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:11,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983929955] [2021-06-05 15:44:11,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983929955] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:44:11,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:44:11,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 15:44:11,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738660126] [2021-06-05 15:44:11,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 15:44:11,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:11,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 15:44:11,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 15:44:11,237 INFO L87 Difference]: Start difference. First operand 181 states and 554 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:11,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:11,301 INFO L93 Difference]: Finished difference Result 221 states and 644 transitions. [2021-06-05 15:44:11,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 15:44:11,306 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 15:44:11,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:11,307 INFO L225 Difference]: With dead ends: 221 [2021-06-05 15:44:11,307 INFO L226 Difference]: Without dead ends: 190 [2021-06-05 15:44:11,307 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:44:11,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-06-05 15:44:11,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 169. [2021-06-05 15:44:11,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 3.0297619047619047) internal successors, (509), 168 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:11,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 509 transitions. [2021-06-05 15:44:11,325 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 509 transitions. Word has length 18 [2021-06-05 15:44:11,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:11,325 INFO L482 AbstractCegarLoop]: Abstraction has 169 states and 509 transitions. [2021-06-05 15:44:11,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:11,325 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 509 transitions. [2021-06-05 15:44:11,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:44:11,327 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:11,328 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:11,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 15:44:11,328 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:11,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:11,328 INFO L82 PathProgramCache]: Analyzing trace with hash 507661300, now seen corresponding path program 1 times [2021-06-05 15:44:11,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:11,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733762042] [2021-06-05 15:44:11,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:11,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:11,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:11,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:11,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733762042] [2021-06-05 15:44:11,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733762042] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:44:11,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:44:11,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 15:44:11,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125252026] [2021-06-05 15:44:11,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 15:44:11,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:11,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 15:44:11,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 15:44:11,352 INFO L87 Difference]: Start difference. First operand 169 states and 509 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:11,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:11,366 INFO L93 Difference]: Finished difference Result 239 states and 717 transitions. [2021-06-05 15:44:11,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 15:44:11,367 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:44:11,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:11,369 INFO L225 Difference]: With dead ends: 239 [2021-06-05 15:44:11,369 INFO L226 Difference]: Without dead ends: 203 [2021-06-05 15:44:11,369 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 15:44:11,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-06-05 15:44:11,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2021-06-05 15:44:11,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 3.0247524752475248) internal successors, (611), 202 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:11,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 611 transitions. [2021-06-05 15:44:11,382 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 611 transitions. Word has length 19 [2021-06-05 15:44:11,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:11,383 INFO L482 AbstractCegarLoop]: Abstraction has 203 states and 611 transitions. [2021-06-05 15:44:11,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:11,383 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 611 transitions. [2021-06-05 15:44:11,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 15:44:11,384 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:11,384 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:11,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 15:44:11,385 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:11,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:11,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1163798226, now seen corresponding path program 1 times [2021-06-05 15:44:11,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:11,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82731740] [2021-06-05 15:44:11,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:11,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:11,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:11,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:11,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82731740] [2021-06-05 15:44:11,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82731740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:11,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437837082] [2021-06-05 15:44:11,442 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 15:44:11,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:11,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 15:44:11,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:11,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:11,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437837082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:11,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:11,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-06-05 15:44:11,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726470286] [2021-06-05 15:44:11,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 15:44:11,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:11,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 15:44:11,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:44:11,561 INFO L87 Difference]: Start difference. First operand 203 states and 611 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:11,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:11,622 INFO L93 Difference]: Finished difference Result 280 states and 853 transitions. [2021-06-05 15:44:11,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 15:44:11,623 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have 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 15:44:11,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:11,625 INFO L225 Difference]: With dead ends: 280 [2021-06-05 15:44:11,625 INFO L226 Difference]: Without dead ends: 280 [2021-06-05 15:44:11,626 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 26.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:44:11,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-06-05 15:44:11,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 215. [2021-06-05 15:44:11,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 3.0233644859813085) internal successors, (647), 214 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:11,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 647 transitions. [2021-06-05 15:44:11,643 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 647 transitions. Word has length 21 [2021-06-05 15:44:11,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:11,643 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 647 transitions. [2021-06-05 15:44:11,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:11,644 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 647 transitions. [2021-06-05 15:44:11,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:44:11,646 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:11,646 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:11,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:11,857 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:11,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:11,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1608131998, now seen corresponding path program 1 times [2021-06-05 15:44:11,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:11,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189312570] [2021-06-05 15:44:11,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:11,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:11,960 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 15:44:11,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:11,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189312570] [2021-06-05 15:44:11,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189312570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:11,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739214388] [2021-06-05 15:44:11,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 15:44:11,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:11,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 15:44:11,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:12,180 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 16 treesize of output 12 [2021-06-05 15:44:12,182 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:12,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:12,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-05 15:44:12,202 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:12,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:12,218 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:12,218 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:28, output treesize:20 [2021-06-05 15:44:12,265 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 13 treesize of output 9 [2021-06-05 15:44:12,267 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:12,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:12,273 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:12,273 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:12 [2021-06-05 15:44:12,330 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 15:44:12,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739214388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:12,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:12,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 15:44:12,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029939276] [2021-06-05 15:44:12,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:44:12,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:12,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:44:12,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:44:12,332 INFO L87 Difference]: Start difference. First operand 215 states and 647 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 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 15:44:12,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:12,590 INFO L93 Difference]: Finished difference Result 381 states and 1115 transitions. [2021-06-05 15:44:12,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 15:44:12,590 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 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 15:44:12,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:12,593 INFO L225 Difference]: With dead ends: 381 [2021-06-05 15:44:12,593 INFO L226 Difference]: Without dead ends: 354 [2021-06-05 15:44:12,593 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 157.2ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:44:12,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-06-05 15:44:12,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 294. [2021-06-05 15:44:12,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.9829351535836177) internal successors, (874), 293 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:12,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 874 transitions. [2021-06-05 15:44:12,602 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 874 transitions. Word has length 23 [2021-06-05 15:44:12,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:12,603 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 874 transitions. [2021-06-05 15:44:12,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 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 15:44:12,603 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 874 transitions. [2021-06-05 15:44:12,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:44:12,604 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:12,604 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:12,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:12,817 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:12,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:12,818 INFO L82 PathProgramCache]: Analyzing trace with hash -108579982, now seen corresponding path program 2 times [2021-06-05 15:44:12,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:12,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006623065] [2021-06-05 15:44:12,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:12,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:12,940 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 15:44:12,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:12,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006623065] [2021-06-05 15:44:12,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006623065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:12,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610030] [2021-06-05 15:44:12,940 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 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 15:44:12,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:44:12,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:12,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 15:44:12,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:13,046 INFO L446 ElimStorePlain]: Different costs {0=[v_C_15], 1=[A]} [2021-06-05 15:44:13,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 15:44:13,061 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:13,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:13,072 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 17 treesize of output 13 [2021-06-05 15:44:13,073 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:13,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:13,081 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:13,081 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:34, output treesize:26 [2021-06-05 15:44:13,112 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 13 treesize of output 9 [2021-06-05 15:44:13,113 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:13,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:13,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:13,122 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:12 [2021-06-05 15:44:13,182 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 15:44:13,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:13,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:13,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 15:44:13,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544780687] [2021-06-05 15:44:13,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:44:13,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:13,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:44:13,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:44:13,184 INFO L87 Difference]: Start difference. First operand 294 states and 874 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 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 15:44:13,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:13,448 INFO L93 Difference]: Finished difference Result 588 states and 1800 transitions. [2021-06-05 15:44:13,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 15:44:13,449 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 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 15:44:13,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:13,452 INFO L225 Difference]: With dead ends: 588 [2021-06-05 15:44:13,452 INFO L226 Difference]: Without dead ends: 561 [2021-06-05 15:44:13,452 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 190.9ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:44:13,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-06-05 15:44:13,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 314. [2021-06-05 15:44:13,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 3.073482428115016) internal successors, (962), 313 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:13,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 962 transitions. [2021-06-05 15:44:13,464 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 962 transitions. Word has length 23 [2021-06-05 15:44:13,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:13,464 INFO L482 AbstractCegarLoop]: Abstraction has 314 states and 962 transitions. [2021-06-05 15:44:13,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 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 15:44:13,464 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 962 transitions. [2021-06-05 15:44:13,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:44:13,465 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:13,465 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:13,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:13,688 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:13,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:13,688 INFO L82 PathProgramCache]: Analyzing trace with hash 627268620, now seen corresponding path program 3 times [2021-06-05 15:44:13,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:13,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437546017] [2021-06-05 15:44:13,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:13,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:13,847 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 15:44:13,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:13,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437546017] [2021-06-05 15:44:13,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437546017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:13,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442825908] [2021-06-05 15:44:13,848 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 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 15:44:13,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:44:13,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:13,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 15:44:13,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:13,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 15:44:13,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:13,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:13,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:13,941 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 15:44:13,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 15:44:13,979 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:13,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:13,988 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:13,988 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:20 [2021-06-05 15:44:14,024 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 13 treesize of output 9 [2021-06-05 15:44:14,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:14,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:14,032 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:14,032 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:12 [2021-06-05 15:44:14,104 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 15:44:14,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442825908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:14,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:14,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 15:44:14,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217893302] [2021-06-05 15:44:14,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:44:14,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:14,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:44:14,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:44:14,107 INFO L87 Difference]: Start difference. First operand 314 states and 962 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 15:44:14,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:14,534 INFO L93 Difference]: Finished difference Result 534 states and 1651 transitions. [2021-06-05 15:44:14,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 15:44:14,534 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 15:44:14,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:14,537 INFO L225 Difference]: With dead ends: 534 [2021-06-05 15:44:14,538 INFO L226 Difference]: Without dead ends: 507 [2021-06-05 15:44:14,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 221.7ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:44:14,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-06-05 15:44:14,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 366. [2021-06-05 15:44:14,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 3.084931506849315) internal successors, (1126), 365 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:14,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1126 transitions. [2021-06-05 15:44:14,551 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1126 transitions. Word has length 23 [2021-06-05 15:44:14,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:14,551 INFO L482 AbstractCegarLoop]: Abstraction has 366 states and 1126 transitions. [2021-06-05 15:44:14,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 15:44:14,551 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1126 transitions. [2021-06-05 15:44:14,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:44:14,552 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:14,552 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:14,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:14,776 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:14,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:14,777 INFO L82 PathProgramCache]: Analyzing trace with hash -793182992, now seen corresponding path program 4 times [2021-06-05 15:44:14,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:14,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555285744] [2021-06-05 15:44:14,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:14,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:14,908 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 15:44:14,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:14,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555285744] [2021-06-05 15:44:14,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555285744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:14,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976062415] [2021-06-05 15:44:14,908 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 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 15:44:14,953 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:44:14,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:14,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 15:44:14,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:14,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 15:44:14,995 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:15,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:15,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:15,005 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 15:44:15,047 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 15 treesize of output 11 [2021-06-05 15:44:15,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:15,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:15,056 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:15,056 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:17 [2021-06-05 15:44:15,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 15:44:15,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:15,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:15,087 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:15,088 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:12 [2021-06-05 15:44:15,143 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 15:44:15,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976062415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:15,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:15,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 15:44:15,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776107057] [2021-06-05 15:44:15,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:44:15,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:15,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:44:15,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:44:15,145 INFO L87 Difference]: Start difference. First operand 366 states and 1126 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 15:44:15,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:15,357 INFO L93 Difference]: Finished difference Result 573 states and 1778 transitions. [2021-06-05 15:44:15,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 15:44:15,357 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 15:44:15,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:15,360 INFO L225 Difference]: With dead ends: 573 [2021-06-05 15:44:15,360 INFO L226 Difference]: Without dead ends: 546 [2021-06-05 15:44:15,361 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 170.7ms TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:44:15,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-06-05 15:44:15,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 366. [2021-06-05 15:44:15,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 3.084931506849315) internal successors, (1126), 365 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:15,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1126 transitions. [2021-06-05 15:44:15,373 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1126 transitions. Word has length 23 [2021-06-05 15:44:15,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:15,373 INFO L482 AbstractCegarLoop]: Abstraction has 366 states and 1126 transitions. [2021-06-05 15:44:15,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 15:44:15,373 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1126 transitions. [2021-06-05 15:44:15,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 15:44:15,374 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:15,374 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:15,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:15,593 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:15,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:15,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1481835136, now seen corresponding path program 5 times [2021-06-05 15:44:15,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:15,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275695690] [2021-06-05 15:44:15,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:15,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:15,623 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:15,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:15,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275695690] [2021-06-05 15:44:15,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275695690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:15,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926817343] [2021-06-05 15:44:15,623 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 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 15:44:15,661 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:44:15,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:15,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 15:44:15,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:15,717 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:15,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926817343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:15,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:15,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 15:44:15,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642953800] [2021-06-05 15:44:15,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 15:44:15,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:15,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 15:44:15,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:44:15,719 INFO L87 Difference]: Start difference. First operand 366 states and 1126 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:15,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:15,831 INFO L93 Difference]: Finished difference Result 802 states and 2408 transitions. [2021-06-05 15:44:15,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 15:44:15,831 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have 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 15:44:15,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:15,835 INFO L225 Difference]: With dead ends: 802 [2021-06-05 15:44:15,836 INFO L226 Difference]: Without dead ends: 802 [2021-06-05 15:44:15,836 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 43.2ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:44:15,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2021-06-05 15:44:15,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 460. [2021-06-05 15:44:15,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 3.252723311546841) internal successors, (1493), 459 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:15,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1493 transitions. [2021-06-05 15:44:15,851 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1493 transitions. Word has length 25 [2021-06-05 15:44:15,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:15,852 INFO L482 AbstractCegarLoop]: Abstraction has 460 states and 1493 transitions. [2021-06-05 15:44:15,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:15,852 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1493 transitions. [2021-06-05 15:44:15,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 15:44:15,853 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:15,853 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:16,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 15:44:16,076 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:16,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:16,076 INFO L82 PathProgramCache]: Analyzing trace with hash 895801792, now seen corresponding path program 6 times [2021-06-05 15:44:16,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:16,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300678400] [2021-06-05 15:44:16,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:16,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:16,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:16,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:16,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300678400] [2021-06-05 15:44:16,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300678400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:16,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633064570] [2021-06-05 15:44:16,115 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 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 15:44:16,143 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:44:16,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:16,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:44:16,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:16,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:44:16,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633064570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:16,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:16,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 15:44:16,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451307326] [2021-06-05 15:44:16,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 15:44:16,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:16,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 15:44:16,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:44:16,219 INFO L87 Difference]: Start difference. First operand 460 states and 1493 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 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 15:44:17,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:17,046 INFO L93 Difference]: Finished difference Result 1766 states and 5540 transitions. [2021-06-05 15:44:17,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 15:44:17,047 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 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 15:44:17,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:17,056 INFO L225 Difference]: With dead ends: 1766 [2021-06-05 15:44:17,056 INFO L226 Difference]: Without dead ends: 1766 [2021-06-05 15:44:17,057 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 472.5ms TimeCoverageRelationStatistics Valid=463, Invalid=1793, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:44:17,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1766 states. [2021-06-05 15:44:17,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1766 to 908. [2021-06-05 15:44:17,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 908 states, 907 states have (on average 3.404630650496141) internal successors, (3088), 907 states have internal predecessors, (3088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:17,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 3088 transitions. [2021-06-05 15:44:17,090 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 3088 transitions. Word has length 25 [2021-06-05 15:44:17,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:17,091 INFO L482 AbstractCegarLoop]: Abstraction has 908 states and 3088 transitions. [2021-06-05 15:44:17,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 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 15:44:17,091 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 3088 transitions. [2021-06-05 15:44:17,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 15:44:17,094 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:17,094 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:17,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-05 15:44:17,309 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:17,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:17,309 INFO L82 PathProgramCache]: Analyzing trace with hash -299972656, now seen corresponding path program 7 times [2021-06-05 15:44:17,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:17,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089046987] [2021-06-05 15:44:17,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:17,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:17,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:17,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:17,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089046987] [2021-06-05 15:44:17,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089046987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:17,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047342714] [2021-06-05 15:44:17,337 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 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 15:44:17,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:17,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 15:44:17,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:17,427 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:17,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047342714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:17,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:17,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 15:44:17,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881486850] [2021-06-05 15:44:17,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 15:44:17,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:17,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 15:44:17,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:44:17,428 INFO L87 Difference]: Start difference. First operand 908 states and 3088 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:17,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:17,513 INFO L93 Difference]: Finished difference Result 1372 states and 4480 transitions. [2021-06-05 15:44:17,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 15:44:17,513 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have 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 15:44:17,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:17,520 INFO L225 Difference]: With dead ends: 1372 [2021-06-05 15:44:17,520 INFO L226 Difference]: Without dead ends: 1366 [2021-06-05 15:44:17,520 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 23.3ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:44:17,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1366 states. [2021-06-05 15:44:17,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1366 to 907. [2021-06-05 15:44:17,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 906 states have (on average 3.3863134657836644) internal successors, (3068), 906 states have internal predecessors, (3068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:17,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 3068 transitions. [2021-06-05 15:44:17,548 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 3068 transitions. Word has length 25 [2021-06-05 15:44:17,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:17,548 INFO L482 AbstractCegarLoop]: Abstraction has 907 states and 3068 transitions. [2021-06-05 15:44:17,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:17,548 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 3068 transitions. [2021-06-05 15:44:17,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 15:44:17,551 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:17,551 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:17,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:17,773 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:17,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:17,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1819069974, now seen corresponding path program 8 times [2021-06-05 15:44:17,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:17,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333342287] [2021-06-05 15:44:17,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:17,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:17,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:17,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:17,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333342287] [2021-06-05 15:44:17,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333342287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:17,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492515675] [2021-06-05 15:44:17,804 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 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 15:44:17,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:44:17,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:17,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 15:44:17,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:17,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:44:17,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492515675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:17,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:17,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 15:44:17,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475870829] [2021-06-05 15:44:17,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 15:44:17,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:17,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 15:44:17,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:44:17,893 INFO L87 Difference]: Start difference. First operand 907 states and 3068 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 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 15:44:18,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:18,373 INFO L93 Difference]: Finished difference Result 2708 states and 9315 transitions. [2021-06-05 15:44:18,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:44:18,374 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 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 15:44:18,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:18,388 INFO L225 Difference]: With dead ends: 2708 [2021-06-05 15:44:18,388 INFO L226 Difference]: Without dead ends: 2666 [2021-06-05 15:44:18,389 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 249.4ms TimeCoverageRelationStatistics Valid=244, Invalid=812, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:44:18,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2666 states. [2021-06-05 15:44:18,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2666 to 1405. [2021-06-05 15:44:18,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1405 states, 1404 states have (on average 3.6039886039886038) internal successors, (5060), 1404 states have internal predecessors, (5060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:18,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1405 states to 1405 states and 5060 transitions. [2021-06-05 15:44:18,437 INFO L78 Accepts]: Start accepts. Automaton has 1405 states and 5060 transitions. Word has length 25 [2021-06-05 15:44:18,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:18,437 INFO L482 AbstractCegarLoop]: Abstraction has 1405 states and 5060 transitions. [2021-06-05 15:44:18,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 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 15:44:18,437 INFO L276 IsEmpty]: Start isEmpty. Operand 1405 states and 5060 transitions. [2021-06-05 15:44:18,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:44:18,441 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:18,441 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:18,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:18,665 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:18,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:18,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1863515072, now seen corresponding path program 9 times [2021-06-05 15:44:18,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:18,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193040916] [2021-06-05 15:44:18,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:18,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:18,696 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:18,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:18,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193040916] [2021-06-05 15:44:18,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193040916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:18,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261557390] [2021-06-05 15:44:18,697 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 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 15:44:18,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:44:18,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:18,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:44:18,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:18,818 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:44:18,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261557390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:18,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:18,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 15:44:18,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794859229] [2021-06-05 15:44:18,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 15:44:18,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:18,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 15:44:18,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:44:18,820 INFO L87 Difference]: Start difference. First operand 1405 states and 5060 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 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 15:44:19,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:19,196 INFO L93 Difference]: Finished difference Result 3015 states and 10002 transitions. [2021-06-05 15:44:19,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:44:19,197 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 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 26 [2021-06-05 15:44:19,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:19,209 INFO L225 Difference]: With dead ends: 3015 [2021-06-05 15:44:19,209 INFO L226 Difference]: Without dead ends: 2566 [2021-06-05 15:44:19,210 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 201.1ms TimeCoverageRelationStatistics Valid=227, Invalid=703, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:44:19,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2566 states. [2021-06-05 15:44:19,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2566 to 1717. [2021-06-05 15:44:19,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1717 states, 1716 states have (on average 3.518065268065268) internal successors, (6037), 1716 states have internal predecessors, (6037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:19,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1717 states to 1717 states and 6037 transitions. [2021-06-05 15:44:19,262 INFO L78 Accepts]: Start accepts. Automaton has 1717 states and 6037 transitions. Word has length 26 [2021-06-05 15:44:19,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:19,262 INFO L482 AbstractCegarLoop]: Abstraction has 1717 states and 6037 transitions. [2021-06-05 15:44:19,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 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 15:44:19,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1717 states and 6037 transitions. [2021-06-05 15:44:19,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:44:19,267 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:19,268 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:19,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 15:44:19,481 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:19,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:19,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1408858976, now seen corresponding path program 10 times [2021-06-05 15:44:19,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:19,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40875333] [2021-06-05 15:44:19,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:19,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:19,518 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:44:19,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:19,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40875333] [2021-06-05 15:44:19,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40875333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:19,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391574584] [2021-06-05 15:44:19,518 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 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 15:44:19,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:44:19,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:19,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 15:44:19,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:19,592 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:44:19,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391574584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:19,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:19,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 15:44:19,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109845437] [2021-06-05 15:44:19,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 15:44:19,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:19,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 15:44:19,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:44:19,594 INFO L87 Difference]: Start difference. First operand 1717 states and 6037 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 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 15:44:19,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:19,675 INFO L93 Difference]: Finished difference Result 3213 states and 10872 transitions. [2021-06-05 15:44:19,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 15:44:19,675 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 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 28 [2021-06-05 15:44:19,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:19,695 INFO L225 Difference]: With dead ends: 3213 [2021-06-05 15:44:19,695 INFO L226 Difference]: Without dead ends: 3203 [2021-06-05 15:44:19,695 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 28.2ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:44:19,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3203 states. [2021-06-05 15:44:19,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3203 to 2341. [2021-06-05 15:44:19,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2341 states, 2340 states have (on average 3.5534188034188032) internal successors, (8315), 2340 states have internal predecessors, (8315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:19,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2341 states to 2341 states and 8315 transitions. [2021-06-05 15:44:19,756 INFO L78 Accepts]: Start accepts. Automaton has 2341 states and 8315 transitions. Word has length 28 [2021-06-05 15:44:19,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:19,756 INFO L482 AbstractCegarLoop]: Abstraction has 2341 states and 8315 transitions. [2021-06-05 15:44:19,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 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 15:44:19,756 INFO L276 IsEmpty]: Start isEmpty. Operand 2341 states and 8315 transitions. [2021-06-05 15:44:19,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:44:19,762 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:19,762 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:19,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 15:44:19,984 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:19,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:19,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1644408306, now seen corresponding path program 11 times [2021-06-05 15:44:19,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:19,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913971258] [2021-06-05 15:44:19,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:19,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:20,010 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:44:20,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:20,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913971258] [2021-06-05 15:44:20,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913971258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:20,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546237008] [2021-06-05 15:44:20,011 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 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 15:44:20,060 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:44:20,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:20,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 15:44:20,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:20,127 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:44:20,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546237008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:20,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:20,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 15:44:20,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986089082] [2021-06-05 15:44:20,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 15:44:20,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:20,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 15:44:20,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:44:20,129 INFO L87 Difference]: Start difference. First operand 2341 states and 8315 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 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 15:44:20,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:20,666 INFO L93 Difference]: Finished difference Result 6700 states and 22333 transitions. [2021-06-05 15:44:20,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 15:44:20,667 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 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 28 [2021-06-05 15:44:20,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:20,685 INFO L225 Difference]: With dead ends: 6700 [2021-06-05 15:44:20,685 INFO L226 Difference]: Without dead ends: 6522 [2021-06-05 15:44:20,686 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 264.7ms TimeCoverageRelationStatistics Valid=360, Invalid=1200, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:44:20,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6522 states. [2021-06-05 15:44:20,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6522 to 3855. [2021-06-05 15:44:20,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3855 states, 3854 states have (on average 3.700311364815776) internal successors, (14261), 3854 states have internal predecessors, (14261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:20,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3855 states to 3855 states and 14261 transitions. [2021-06-05 15:44:20,804 INFO L78 Accepts]: Start accepts. Automaton has 3855 states and 14261 transitions. Word has length 28 [2021-06-05 15:44:20,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:20,804 INFO L482 AbstractCegarLoop]: Abstraction has 3855 states and 14261 transitions. [2021-06-05 15:44:20,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 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 15:44:20,804 INFO L276 IsEmpty]: Start isEmpty. Operand 3855 states and 14261 transitions. [2021-06-05 15:44:20,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:44:20,814 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:20,814 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:21,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 15:44:21,029 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:21,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:21,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1106764104, now seen corresponding path program 12 times [2021-06-05 15:44:21,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:21,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357558920] [2021-06-05 15:44:21,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:21,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:21,055 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:44:21,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:21,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357558920] [2021-06-05 15:44:21,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357558920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:21,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043591199] [2021-06-05 15:44:21,055 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 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 15:44:21,100 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:44:21,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:21,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 15:44:21,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:21,145 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:44:21,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043591199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:21,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:21,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 15:44:21,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239235025] [2021-06-05 15:44:21,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 15:44:21,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:21,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 15:44:21,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:44:21,147 INFO L87 Difference]: Start difference. First operand 3855 states and 14261 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 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 15:44:21,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:21,292 INFO L93 Difference]: Finished difference Result 5643 states and 19918 transitions. [2021-06-05 15:44:21,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 15:44:21,293 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 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 28 [2021-06-05 15:44:21,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:21,306 INFO L225 Difference]: With dead ends: 5643 [2021-06-05 15:44:21,306 INFO L226 Difference]: Without dead ends: 5601 [2021-06-05 15:44:21,306 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 42.9ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:44:21,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5601 states. [2021-06-05 15:44:21,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5601 to 4737. [2021-06-05 15:44:21,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4737 states, 4736 states have (on average 3.6630067567567566) internal successors, (17348), 4736 states have internal predecessors, (17348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:21,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4737 states to 4737 states and 17348 transitions. [2021-06-05 15:44:21,466 INFO L78 Accepts]: Start accepts. Automaton has 4737 states and 17348 transitions. Word has length 28 [2021-06-05 15:44:21,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:21,466 INFO L482 AbstractCegarLoop]: Abstraction has 4737 states and 17348 transitions. [2021-06-05 15:44:21,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 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 15:44:21,467 INFO L276 IsEmpty]: Start isEmpty. Operand 4737 states and 17348 transitions. [2021-06-05 15:44:21,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:44:21,479 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:21,479 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:21,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:21,697 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:21,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:21,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1836774554, now seen corresponding path program 13 times [2021-06-05 15:44:21,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:21,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076746579] [2021-06-05 15:44:21,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:21,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:21,727 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:44:21,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:21,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076746579] [2021-06-05 15:44:21,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076746579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:21,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044956148] [2021-06-05 15:44:21,727 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 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 15:44:21,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:21,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 15:44:21,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:21,800 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:44:21,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044956148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:21,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:21,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 15:44:21,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116300393] [2021-06-05 15:44:21,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 15:44:21,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:21,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 15:44:21,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:44:21,801 INFO L87 Difference]: Start difference. First operand 4737 states and 17348 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 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 15:44:21,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:21,900 INFO L93 Difference]: Finished difference Result 5055 states and 18166 transitions. [2021-06-05 15:44:21,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 15:44:21,900 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 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 28 [2021-06-05 15:44:21,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:21,919 INFO L225 Difference]: With dead ends: 5055 [2021-06-05 15:44:21,920 INFO L226 Difference]: Without dead ends: 5011 [2021-06-05 15:44:21,920 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 24.2ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:44:21,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5011 states. [2021-06-05 15:44:21,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5011 to 4680. [2021-06-05 15:44:22,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4680 states, 4679 states have (on average 3.663175892284676) internal successors, (17140), 4679 states have internal predecessors, (17140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:22,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4680 states to 4680 states and 17140 transitions. [2021-06-05 15:44:22,018 INFO L78 Accepts]: Start accepts. Automaton has 4680 states and 17140 transitions. Word has length 28 [2021-06-05 15:44:22,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:22,018 INFO L482 AbstractCegarLoop]: Abstraction has 4680 states and 17140 transitions. [2021-06-05 15:44:22,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 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 15:44:22,019 INFO L276 IsEmpty]: Start isEmpty. Operand 4680 states and 17140 transitions. [2021-06-05 15:44:22,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:44:22,028 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:22,029 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:22,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 15:44:22,244 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:22,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:22,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1601596804, now seen corresponding path program 14 times [2021-06-05 15:44:22,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:22,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765905016] [2021-06-05 15:44:22,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:22,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:22,493 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:22,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:22,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765905016] [2021-06-05 15:44:22,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765905016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:22,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858188838] [2021-06-05 15:44:22,493 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 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 15:44:22,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:44:22,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:22,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:44:22,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:22,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 15:44:22,667 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:22,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:22,679 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:22,679 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:34 [2021-06-05 15:44:22,771 INFO L446 ElimStorePlain]: Different costs {0=[A], 2=[v_C_19]} [2021-06-05 15:44:22,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 15:44:22,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:22,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:22,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:22,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2021-06-05 15:44:22,793 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:22,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:22,800 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:22,800 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:45, output treesize:30 [2021-06-05 15:44:22,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:44:22,832 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:22,837 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:22,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:22,838 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:12 [2021-06-05 15:44:22,921 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:22,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858188838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:22,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:22,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-06-05 15:44:22,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112133016] [2021-06-05 15:44:22,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:44:22,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:22,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:44:22,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:44:22,923 INFO L87 Difference]: Start difference. First operand 4680 states and 17140 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:23,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:23,599 INFO L93 Difference]: Finished difference Result 7408 states and 26889 transitions. [2021-06-05 15:44:23,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:44:23,599 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:44:23,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:23,618 INFO L225 Difference]: With dead ends: 7408 [2021-06-05 15:44:23,618 INFO L226 Difference]: Without dead ends: 7387 [2021-06-05 15:44:23,619 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 515.9ms TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:44:23,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7387 states. [2021-06-05 15:44:23,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7387 to 4727. [2021-06-05 15:44:23,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4727 states, 4726 states have (on average 3.654253068133728) internal successors, (17270), 4726 states have internal predecessors, (17270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:23,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4727 states to 4727 states and 17270 transitions. [2021-06-05 15:44:23,730 INFO L78 Accepts]: Start accepts. Automaton has 4727 states and 17270 transitions. Word has length 30 [2021-06-05 15:44:23,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:23,730 INFO L482 AbstractCegarLoop]: Abstraction has 4727 states and 17270 transitions. [2021-06-05 15:44:23,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:23,730 INFO L276 IsEmpty]: Start isEmpty. Operand 4727 states and 17270 transitions. [2021-06-05 15:44:23,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:44:23,740 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:23,740 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:23,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:23,954 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:23,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:23,955 INFO L82 PathProgramCache]: Analyzing trace with hash 11304900, now seen corresponding path program 15 times [2021-06-05 15:44:23,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:23,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158663874] [2021-06-05 15:44:23,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:23,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:24,351 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:24,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:24,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158663874] [2021-06-05 15:44:24,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158663874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:24,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122211344] [2021-06-05 15:44:24,352 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 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 15:44:24,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:44:24,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:24,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:44:24,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:24,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 15:44:24,606 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:24,617 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:24,619 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 1 xjuncts. [2021-06-05 15:44:24,619 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:33 [2021-06-05 15:44:24,741 INFO L446 ElimStorePlain]: Different costs {1=[v_C_21], 6=[A]} [2021-06-05 15:44:24,754 INFO L354 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2021-06-05 15:44:24,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2021-06-05 15:44:24,756 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:24,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:24,799 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-05 15:44:24,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 36 [2021-06-05 15:44:24,804 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:24,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:24,899 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 15:44:24,900 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:51, output treesize:145 [2021-06-05 15:44:25,240 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1], 2=[C]} [2021-06-05 15:44:25,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 15:44:25,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:25,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:25,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:25,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:25,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:44:25,273 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:25,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:25,293 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 15:44:25,293 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:61, output treesize:34 [2021-06-05 15:44:25,443 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:25,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122211344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:25,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:25,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 15:44:25,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042932388] [2021-06-05 15:44:25,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:44:25,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:25,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:44:25,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:44:25,444 INFO L87 Difference]: Start difference. First operand 4727 states and 17270 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:27,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:27,003 INFO L93 Difference]: Finished difference Result 7366 states and 26715 transitions. [2021-06-05 15:44:27,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:44:27,004 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:44:27,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:27,019 INFO L225 Difference]: With dead ends: 7366 [2021-06-05 15:44:27,019 INFO L226 Difference]: Without dead ends: 7312 [2021-06-05 15:44:27,020 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 1564.9ms TimeCoverageRelationStatistics Valid=189, Invalid=1293, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:44:27,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7312 states. [2021-06-05 15:44:27,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7312 to 4804. [2021-06-05 15:44:27,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4804 states, 4803 states have (on average 3.6420986883198) internal successors, (17493), 4803 states have internal predecessors, (17493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:27,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4804 states to 4804 states and 17493 transitions. [2021-06-05 15:44:27,130 INFO L78 Accepts]: Start accepts. Automaton has 4804 states and 17493 transitions. Word has length 30 [2021-06-05 15:44:27,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:27,130 INFO L482 AbstractCegarLoop]: Abstraction has 4804 states and 17493 transitions. [2021-06-05 15:44:27,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:27,130 INFO L276 IsEmpty]: Start isEmpty. Operand 4804 states and 17493 transitions. [2021-06-05 15:44:27,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:44:27,140 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:27,141 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:27,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:27,361 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:27,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:27,361 INFO L82 PathProgramCache]: Analyzing trace with hash -710829310, now seen corresponding path program 16 times [2021-06-05 15:44:27,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:27,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145058617] [2021-06-05 15:44:27,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:27,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:27,627 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:27,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:27,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145058617] [2021-06-05 15:44:27,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145058617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:27,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988596194] [2021-06-05 15:44:27,627 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 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 15:44:27,675 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:44:27,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:27,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:44:27,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:27,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 15:44:27,760 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:27,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:27,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:27,776 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:56, output treesize:55 [2021-06-05 15:44:27,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:27,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2021-06-05 15:44:27,949 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:27,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:27,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:27,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 30 [2021-06-05 15:44:27,969 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:27,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:27,981 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:27,981 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:46 [2021-06-05 15:44:28,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-06-05 15:44:28,021 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:28,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:28,029 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:28,029 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:17 [2021-06-05 15:44:28,072 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:28,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988596194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:28,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:28,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 15:44:28,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962255472] [2021-06-05 15:44:28,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:44:28,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:28,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:44:28,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:44:28,074 INFO L87 Difference]: Start difference. First operand 4804 states and 17493 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:28,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:28,759 INFO L93 Difference]: Finished difference Result 8065 states and 28901 transitions. [2021-06-05 15:44:28,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:44:28,759 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:44:28,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:28,774 INFO L225 Difference]: With dead ends: 8065 [2021-06-05 15:44:28,774 INFO L226 Difference]: Without dead ends: 8023 [2021-06-05 15:44:28,774 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 546.1ms TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:44:28,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8023 states. [2021-06-05 15:44:28,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8023 to 4850. [2021-06-05 15:44:28,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4850 states, 4849 states have (on average 3.6417818106826148) internal successors, (17659), 4849 states have internal predecessors, (17659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:28,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4850 states to 4850 states and 17659 transitions. [2021-06-05 15:44:28,891 INFO L78 Accepts]: Start accepts. Automaton has 4850 states and 17659 transitions. Word has length 30 [2021-06-05 15:44:28,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:28,891 INFO L482 AbstractCegarLoop]: Abstraction has 4850 states and 17659 transitions. [2021-06-05 15:44:28,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:28,891 INFO L276 IsEmpty]: Start isEmpty. Operand 4850 states and 17659 transitions. [2021-06-05 15:44:28,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:44:28,901 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:28,901 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:29,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-05 15:44:29,117 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:29,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:29,117 INFO L82 PathProgramCache]: Analyzing trace with hash -2079167272, now seen corresponding path program 17 times [2021-06-05 15:44:29,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:29,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616394734] [2021-06-05 15:44:29,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:29,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:29,498 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:29,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:29,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616394734] [2021-06-05 15:44:29,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616394734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:29,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929949030] [2021-06-05 15:44:29,498 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 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 15:44:29,532 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:44:29,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:29,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 15:44:29,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:29,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 15:44:29,647 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:29,657 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:29,658 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:29,658 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:28 [2021-06-05 15:44:29,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 15:44:29,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:29,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:29,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 16 [2021-06-05 15:44:29,741 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:29,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:29,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:29,748 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:38, output treesize:21 [2021-06-05 15:44:29,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:29,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:29,872 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:29,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 39 [2021-06-05 15:44:29,885 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:44:29,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:29,902 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:29,903 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:21 [2021-06-05 15:44:29,986 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:29,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929949030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:29,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:29,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-06-05 15:44:29,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475852203] [2021-06-05 15:44:29,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:44:29,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:29,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:44:29,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:44:29,988 INFO L87 Difference]: Start difference. First operand 4850 states and 17659 transitions. Second operand has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:30,446 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-06-05 15:44:31,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:31,227 INFO L93 Difference]: Finished difference Result 8106 states and 29154 transitions. [2021-06-05 15:44:31,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:44:31,228 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:44:31,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:31,244 INFO L225 Difference]: With dead ends: 8106 [2021-06-05 15:44:31,244 INFO L226 Difference]: Without dead ends: 8079 [2021-06-05 15:44:31,244 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1246.8ms TimeCoverageRelationStatistics Valid=167, Invalid=1023, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:44:31,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8079 states. [2021-06-05 15:44:31,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8079 to 4912. [2021-06-05 15:44:31,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4912 states, 4911 states have (on average 3.6424353492160457) internal successors, (17888), 4911 states have internal predecessors, (17888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:31,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4912 states to 4912 states and 17888 transitions. [2021-06-05 15:44:31,374 INFO L78 Accepts]: Start accepts. Automaton has 4912 states and 17888 transitions. Word has length 30 [2021-06-05 15:44:31,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:31,374 INFO L482 AbstractCegarLoop]: Abstraction has 4912 states and 17888 transitions. [2021-06-05 15:44:31,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:31,375 INFO L276 IsEmpty]: Start isEmpty. Operand 4912 states and 17888 transitions. [2021-06-05 15:44:31,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:44:31,383 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:31,383 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:31,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:31,584 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:31,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:31,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1068514906, now seen corresponding path program 18 times [2021-06-05 15:44:31,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:31,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090139961] [2021-06-05 15:44:31,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:31,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:31,838 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:31,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:31,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090139961] [2021-06-05 15:44:31,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090139961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:31,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043127695] [2021-06-05 15:44:31,838 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 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 15:44:31,872 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:44:31,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:31,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:44:31,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:31,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 15:44:31,916 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:31,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:31,928 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:31,928 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:46 [2021-06-05 15:44:32,138 INFO L446 ElimStorePlain]: Different costs {0=[v_C_27], 2=[A]} [2021-06-05 15:44:32,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-06-05 15:44:32,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:32,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:32,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:32,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:32,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-06-05 15:44:32,163 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:32,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:32,175 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:32,175 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:60, output treesize:37 [2021-06-05 15:44:32,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-06-05 15:44:32,209 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:32,215 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:32,215 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:32,216 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:17 [2021-06-05 15:44:32,258 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:32,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043127695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:32,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:32,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 15:44:32,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113683100] [2021-06-05 15:44:32,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:44:32,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:32,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:44:32,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:44:32,260 INFO L87 Difference]: Start difference. First operand 4912 states and 17888 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:33,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:33,250 INFO L93 Difference]: Finished difference Result 8129 states and 29154 transitions. [2021-06-05 15:44:33,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:44:33,250 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:44:33,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:33,263 INFO L225 Difference]: With dead ends: 8129 [2021-06-05 15:44:33,263 INFO L226 Difference]: Without dead ends: 8071 [2021-06-05 15:44:33,263 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 830.3ms TimeCoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:44:33,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8071 states. [2021-06-05 15:44:33,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8071 to 4920. [2021-06-05 15:44:33,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4920 states, 4919 states have (on average 3.6413905265297823) internal successors, (17912), 4919 states have internal predecessors, (17912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:33,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4920 states to 4920 states and 17912 transitions. [2021-06-05 15:44:33,362 INFO L78 Accepts]: Start accepts. Automaton has 4920 states and 17912 transitions. Word has length 30 [2021-06-05 15:44:33,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:33,362 INFO L482 AbstractCegarLoop]: Abstraction has 4920 states and 17912 transitions. [2021-06-05 15:44:33,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:33,362 INFO L276 IsEmpty]: Start isEmpty. Operand 4920 states and 17912 transitions. [2021-06-05 15:44:33,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:44:33,372 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:33,373 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:33,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 15:44:33,589 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:33,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:33,589 INFO L82 PathProgramCache]: Analyzing trace with hash 518844538, now seen corresponding path program 19 times [2021-06-05 15:44:33,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:33,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606007020] [2021-06-05 15:44:33,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:33,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:33,793 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:33,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:33,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606007020] [2021-06-05 15:44:33,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606007020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:33,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330173564] [2021-06-05 15:44:33,793 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 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 15:44:33,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:33,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:44:33,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:33,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 15:44:33,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:33,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:33,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:33,883 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:49 [2021-06-05 15:44:33,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-06-05 15:44:33,963 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:33,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:33,977 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:33,977 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:45 [2021-06-05 15:44:34,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2021-06-05 15:44:34,018 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:34,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:34,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:34,028 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:34 [2021-06-05 15:44:34,112 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-06-05 15:44:34,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 23 [2021-06-05 15:44:34,113 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:34,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:34,120 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:34,120 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:15 [2021-06-05 15:44:34,157 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:34,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330173564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:34,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:34,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 15:44:34,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979181418] [2021-06-05 15:44:34,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:44:34,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:34,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:44:34,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:44:34,160 INFO L87 Difference]: Start difference. First operand 4920 states and 17912 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:34,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:34,574 INFO L93 Difference]: Finished difference Result 7550 states and 27431 transitions. [2021-06-05 15:44:34,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 15:44:34,575 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:44:34,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:34,590 INFO L225 Difference]: With dead ends: 7550 [2021-06-05 15:44:34,591 INFO L226 Difference]: Without dead ends: 7529 [2021-06-05 15:44:34,591 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 433.1ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:44:34,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7529 states. [2021-06-05 15:44:34,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7529 to 4944. [2021-06-05 15:44:34,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4944 states, 4943 states have (on average 3.639490188144851) internal successors, (17990), 4943 states have internal predecessors, (17990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:34,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4944 states to 4944 states and 17990 transitions. [2021-06-05 15:44:34,746 INFO L78 Accepts]: Start accepts. Automaton has 4944 states and 17990 transitions. Word has length 30 [2021-06-05 15:44:34,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:34,746 INFO L482 AbstractCegarLoop]: Abstraction has 4944 states and 17990 transitions. [2021-06-05 15:44:34,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:34,746 INFO L276 IsEmpty]: Start isEmpty. Operand 4944 states and 17990 transitions. [2021-06-05 15:44:34,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:44:34,756 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:34,756 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:34,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 15:44:34,973 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:34,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:34,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1253982764, now seen corresponding path program 20 times [2021-06-05 15:44:34,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:34,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080638541] [2021-06-05 15:44:34,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:34,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:35,194 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:35,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:35,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080638541] [2021-06-05 15:44:35,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080638541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:35,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853638046] [2021-06-05 15:44:35,195 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 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 15:44:35,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:44:35,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:35,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:44:35,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:35,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 15:44:35,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:35,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:35,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:35,283 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:49 [2021-06-05 15:44:35,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:35,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2021-06-05 15:44:35,367 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:35,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:35,383 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:35,383 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:63, output treesize:58 [2021-06-05 15:44:35,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-06-05 15:44:35,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:35,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:35,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:35,433 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:52, output treesize:34 [2021-06-05 15:44:35,474 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-06-05 15:44:35,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 23 [2021-06-05 15:44:35,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:35,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:35,484 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:35,484 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:20 [2021-06-05 15:44:35,548 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:35,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853638046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:35,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:35,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 15:44:35,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442002145] [2021-06-05 15:44:35,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:44:35,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:35,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:44:35,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:44:35,549 INFO L87 Difference]: Start difference. First operand 4944 states and 17990 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:36,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:36,581 INFO L93 Difference]: Finished difference Result 9089 states and 32823 transitions. [2021-06-05 15:44:36,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:44:36,581 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:44:36,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:36,628 INFO L225 Difference]: With dead ends: 9089 [2021-06-05 15:44:36,628 INFO L226 Difference]: Without dead ends: 9068 [2021-06-05 15:44:36,628 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 670.8ms TimeCoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:44:36,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9068 states. [2021-06-05 15:44:36,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9068 to 4947. [2021-06-05 15:44:36,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4947 states, 4946 states have (on average 3.6403154063890013) internal successors, (18005), 4946 states have internal predecessors, (18005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:36,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4947 states to 4947 states and 18005 transitions. [2021-06-05 15:44:36,728 INFO L78 Accepts]: Start accepts. Automaton has 4947 states and 18005 transitions. Word has length 30 [2021-06-05 15:44:36,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:36,728 INFO L482 AbstractCegarLoop]: Abstraction has 4947 states and 18005 transitions. [2021-06-05 15:44:36,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:36,728 INFO L276 IsEmpty]: Start isEmpty. Operand 4947 states and 18005 transitions. [2021-06-05 15:44:36,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:44:36,737 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:36,737 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:36,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:36,945 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:36,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:36,946 INFO L82 PathProgramCache]: Analyzing trace with hash -901607074, now seen corresponding path program 21 times [2021-06-05 15:44:36,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:36,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635538438] [2021-06-05 15:44:36,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:36,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:37,210 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:37,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:37,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635538438] [2021-06-05 15:44:37,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635538438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:37,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634019610] [2021-06-05 15:44:37,210 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 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 15:44:37,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:44:37,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:37,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:44:37,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:37,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 15:44:37,296 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:37,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:37,306 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:37,306 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:38 [2021-06-05 15:44:37,421 INFO L354 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2021-06-05 15:44:37,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 29 [2021-06-05 15:44:37,422 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:37,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:37,435 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:37,435 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:58 [2021-06-05 15:44:37,490 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-06-05 15:44:37,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 45 [2021-06-05 15:44:37,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:37,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:37,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:37,524 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:70, output treesize:94 [2021-06-05 15:44:37,643 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:37,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 56 [2021-06-05 15:44:37,686 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:44:37,699 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 15:44:37,700 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 10 [2021-06-05 15:44:37,701 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:37,713 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:37,713 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 14 [2021-06-05 15:44:37,715 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 15:44:37,858 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2021-06-05 15:44:37,858 INFO L628 ElimStorePlain]: treesize reduction 119, result has 55.1 percent of original size [2021-06-05 15:44:37,880 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 15:44:37,881 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:128, output treesize:239 [2021-06-05 15:44:38,040 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2021-06-05 15:44:38,217 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:38,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634019610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:38,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:38,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 21 [2021-06-05 15:44:38,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897218513] [2021-06-05 15:44:38,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:44:38,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:38,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:44:38,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:44:38,218 INFO L87 Difference]: Start difference. First operand 4947 states and 18005 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:40,032 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 46 [2021-06-05 15:44:40,339 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 45 [2021-06-05 15:44:40,803 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 37 [2021-06-05 15:44:41,031 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 36 [2021-06-05 15:44:41,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:41,292 INFO L93 Difference]: Finished difference Result 8657 states and 30784 transitions. [2021-06-05 15:44:41,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 15:44:41,292 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:44:41,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:41,306 INFO L225 Difference]: With dead ends: 8657 [2021-06-05 15:44:41,306 INFO L226 Difference]: Without dead ends: 8556 [2021-06-05 15:44:41,306 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 2901.6ms TimeCoverageRelationStatistics Valid=426, Invalid=2330, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 15:44:41,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8556 states. [2021-06-05 15:44:41,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8556 to 4982. [2021-06-05 15:44:41,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4982 states, 4981 states have (on average 3.6402328849628587) internal successors, (18132), 4981 states have internal predecessors, (18132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:41,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4982 states to 4982 states and 18132 transitions. [2021-06-05 15:44:41,392 INFO L78 Accepts]: Start accepts. Automaton has 4982 states and 18132 transitions. Word has length 30 [2021-06-05 15:44:41,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:41,393 INFO L482 AbstractCegarLoop]: Abstraction has 4982 states and 18132 transitions. [2021-06-05 15:44:41,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:41,393 INFO L276 IsEmpty]: Start isEmpty. Operand 4982 states and 18132 transitions. [2021-06-05 15:44:41,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:44:41,401 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:41,401 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:41,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-06-05 15:44:41,622 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:41,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:41,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1440214972, now seen corresponding path program 22 times [2021-06-05 15:44:41,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:41,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536376063] [2021-06-05 15:44:41,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:41,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:41,827 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:41,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:41,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536376063] [2021-06-05 15:44:41,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536376063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:41,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698722683] [2021-06-05 15:44:41,828 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 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 15:44:41,856 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:44:41,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:41,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:44:41,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:41,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 15:44:41,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:41,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:41,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:41,915 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:49 [2021-06-05 15:44:42,104 INFO L446 ElimStorePlain]: Different costs {1=[v_C_35], 3=[A]} [2021-06-05 15:44:42,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:42,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2021-06-05 15:44:42,109 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:42,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:42,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:42,138 INFO L354 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2021-06-05 15:44:42,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 29 [2021-06-05 15:44:42,140 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:42,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:42,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:42,152 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:70, output treesize:45 [2021-06-05 15:44:42,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 15:44:42,188 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:42,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:42,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:42,192 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:15 [2021-06-05 15:44:42,220 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:42,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698722683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:42,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:42,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 15:44:42,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924075232] [2021-06-05 15:44:42,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:44:42,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:42,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:44:42,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:44:42,222 INFO L87 Difference]: Start difference. First operand 4982 states and 18132 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:42,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:42,755 INFO L93 Difference]: Finished difference Result 8142 states and 29267 transitions. [2021-06-05 15:44:42,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:44:42,755 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:44:42,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:42,768 INFO L225 Difference]: With dead ends: 8142 [2021-06-05 15:44:42,768 INFO L226 Difference]: Without dead ends: 8100 [2021-06-05 15:44:42,768 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 456.1ms TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:44:42,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8100 states. [2021-06-05 15:44:42,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8100 to 5028. [2021-06-05 15:44:42,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5028 states, 5027 states have (on average 3.6399443007758108) internal successors, (18298), 5027 states have internal predecessors, (18298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:42,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5028 states to 5028 states and 18298 transitions. [2021-06-05 15:44:42,949 INFO L78 Accepts]: Start accepts. Automaton has 5028 states and 18298 transitions. Word has length 30 [2021-06-05 15:44:42,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:42,949 INFO L482 AbstractCegarLoop]: Abstraction has 5028 states and 18298 transitions. [2021-06-05 15:44:42,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:42,949 INFO L276 IsEmpty]: Start isEmpty. Operand 5028 states and 18298 transitions. [2021-06-05 15:44:42,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:44:42,961 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:42,961 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:43,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:43,173 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:43,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:43,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1486414362, now seen corresponding path program 23 times [2021-06-05 15:44:43,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:43,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262282992] [2021-06-05 15:44:43,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:43,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:43,504 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:43,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:43,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262282992] [2021-06-05 15:44:43,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262282992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:43,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793096927] [2021-06-05 15:44:43,505 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 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 15:44:43,531 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:44:43,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:43,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:44:43,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:43,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 15:44:43,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:43,610 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:43,611 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:43,611 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:56, output treesize:55 [2021-06-05 15:44:43,736 INFO L446 ElimStorePlain]: Different costs {1=[v_C_37], 3=[A]} [2021-06-05 15:44:43,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:43,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 15:44:43,742 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:43,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:43,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:43,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:43,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:43,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-06-05 15:44:43,769 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:43,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:43,784 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:43,785 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:75, output treesize:62 [2021-06-05 15:44:43,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:43,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 22 [2021-06-05 15:44:43,911 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:43,918 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:43,923 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:43,923 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:33 [2021-06-05 15:44:43,990 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:43,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793096927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:43,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:43,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-06-05 15:44:43,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147906226] [2021-06-05 15:44:43,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:44:43,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:43,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:44:43,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:44:43,992 INFO L87 Difference]: Start difference. First operand 5028 states and 18298 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:44,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:44,849 INFO L93 Difference]: Finished difference Result 7991 states and 28855 transitions. [2021-06-05 15:44:44,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:44:44,849 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:44:44,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:44,862 INFO L225 Difference]: With dead ends: 7991 [2021-06-05 15:44:44,862 INFO L226 Difference]: Without dead ends: 7952 [2021-06-05 15:44:44,863 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 788.6ms TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:44:44,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7952 states. [2021-06-05 15:44:45,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7952 to 5159. [2021-06-05 15:44:45,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5159 states, 5158 states have (on average 3.630864676231097) internal successors, (18728), 5158 states have internal predecessors, (18728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:45,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5159 states to 5159 states and 18728 transitions. [2021-06-05 15:44:45,027 INFO L78 Accepts]: Start accepts. Automaton has 5159 states and 18728 transitions. Word has length 30 [2021-06-05 15:44:45,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:45,027 INFO L482 AbstractCegarLoop]: Abstraction has 5159 states and 18728 transitions. [2021-06-05 15:44:45,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:45,027 INFO L276 IsEmpty]: Start isEmpty. Operand 5159 states and 18728 transitions. [2021-06-05 15:44:45,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:44:45,036 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:45,036 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:45,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-06-05 15:44:45,253 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:45,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:45,253 INFO L82 PathProgramCache]: Analyzing trace with hash 911205050, now seen corresponding path program 24 times [2021-06-05 15:44:45,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:45,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236612322] [2021-06-05 15:44:45,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:45,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:45,484 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:45,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:45,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236612322] [2021-06-05 15:44:45,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236612322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:45,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807121083] [2021-06-05 15:44:45,485 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 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 15:44:45,514 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:44:45,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:45,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:44:45,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:45,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 15:44:45,550 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:45,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:45,562 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:45,563 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:46 [2021-06-05 15:44:45,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:45,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 15:44:45,600 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:45,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:45,615 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:45,615 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:48 [2021-06-05 15:44:45,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2021-06-05 15:44:45,711 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:45,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:45,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:45,719 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:31 [2021-06-05 15:44:45,767 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-06-05 15:44:45,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 23 [2021-06-05 15:44:45,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:45,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:45,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:45,779 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:17 [2021-06-05 15:44:45,853 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:45,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807121083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:45,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:45,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 15:44:45,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243735811] [2021-06-05 15:44:45,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:44:45,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:45,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:44:45,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:44:45,854 INFO L87 Difference]: Start difference. First operand 5159 states and 18728 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:46,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:46,857 INFO L93 Difference]: Finished difference Result 8555 states and 30791 transitions. [2021-06-05 15:44:46,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:44:46,857 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:44:46,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:46,872 INFO L225 Difference]: With dead ends: 8555 [2021-06-05 15:44:46,872 INFO L226 Difference]: Without dead ends: 8516 [2021-06-05 15:44:46,872 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 646.4ms TimeCoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:44:46,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8516 states. [2021-06-05 15:44:46,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8516 to 5256. [2021-06-05 15:44:46,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5256 states, 5255 states have (on average 3.625880114176974) internal successors, (19054), 5255 states have internal predecessors, (19054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:46,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5256 states to 5256 states and 19054 transitions. [2021-06-05 15:44:46,955 INFO L78 Accepts]: Start accepts. Automaton has 5256 states and 19054 transitions. Word has length 30 [2021-06-05 15:44:46,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:46,956 INFO L482 AbstractCegarLoop]: Abstraction has 5256 states and 19054 transitions. [2021-06-05 15:44:46,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:46,956 INFO L276 IsEmpty]: Start isEmpty. Operand 5256 states and 19054 transitions. [2021-06-05 15:44:46,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:44:46,962 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:46,962 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:47,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:47,163 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:47,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:47,163 INFO L82 PathProgramCache]: Analyzing trace with hash -509246562, now seen corresponding path program 25 times [2021-06-05 15:44:47,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:47,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148769895] [2021-06-05 15:44:47,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:47,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:47,412 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:47,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:47,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148769895] [2021-06-05 15:44:47,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148769895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:47,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147226172] [2021-06-05 15:44:47,412 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 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 15:44:47,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:47,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:44:47,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:47,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 15:44:47,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:47,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:47,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:47,515 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:49 [2021-06-05 15:44:47,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:47,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 15:44:47,550 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:47,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:47,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:47,562 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:52, output treesize:51 [2021-06-05 15:44:47,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:47,677 INFO L354 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2021-06-05 15:44:47,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 33 [2021-06-05 15:44:47,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:47,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:47,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:47,687 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:64, output treesize:52 [2021-06-05 15:44:47,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 28 [2021-06-05 15:44:47,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:47,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:47,726 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:47,726 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:20 [2021-06-05 15:44:47,797 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:47,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147226172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:47,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:47,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 15:44:47,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890033247] [2021-06-05 15:44:47,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:44:47,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:47,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:44:47,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:44:47,798 INFO L87 Difference]: Start difference. First operand 5256 states and 19054 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:48,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:48,316 INFO L93 Difference]: Finished difference Result 8433 states and 30286 transitions. [2021-06-05 15:44:48,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:44:48,317 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:44:48,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:48,331 INFO L225 Difference]: With dead ends: 8433 [2021-06-05 15:44:48,331 INFO L226 Difference]: Without dead ends: 8359 [2021-06-05 15:44:48,331 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 508.4ms TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:44:48,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8359 states. [2021-06-05 15:44:48,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8359 to 5263. [2021-06-05 15:44:48,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5263 states, 5262 states have (on average 3.6244773850247056) internal successors, (19072), 5262 states have internal predecessors, (19072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:48,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5263 states to 5263 states and 19072 transitions. [2021-06-05 15:44:48,413 INFO L78 Accepts]: Start accepts. Automaton has 5263 states and 19072 transitions. Word has length 30 [2021-06-05 15:44:48,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:48,414 INFO L482 AbstractCegarLoop]: Abstraction has 5263 states and 19072 transitions. [2021-06-05 15:44:48,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:48,414 INFO L276 IsEmpty]: Start isEmpty. Operand 5263 states and 19072 transitions. [2021-06-05 15:44:48,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:44:48,421 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:48,421 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:48,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-05 15:44:48,621 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:48,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:48,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1576620264, now seen corresponding path program 26 times [2021-06-05 15:44:48,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:48,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164722498] [2021-06-05 15:44:48,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:48,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:48,967 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:48,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:48,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164722498] [2021-06-05 15:44:48,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164722498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:48,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538283451] [2021-06-05 15:44:48,968 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 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 15:44:48,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:44:48,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:48,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:44:48,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:49,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 15:44:49,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:49,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:49,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:49,051 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:49 [2021-06-05 15:44:49,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:49,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 15:44:49,088 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:49,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:49,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:49,102 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:56 [2021-06-05 15:44:49,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:49,149 INFO L354 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2021-06-05 15:44:49,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 33 [2021-06-05 15:44:49,151 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:49,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:49,163 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:49,163 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:63, output treesize:53 [2021-06-05 15:44:49,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 28 [2021-06-05 15:44:49,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:49,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:49,225 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:49,225 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:20 [2021-06-05 15:44:49,300 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:49,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538283451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:49,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:49,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 15:44:49,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004032587] [2021-06-05 15:44:49,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:44:49,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:49,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:44:49,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:44:49,301 INFO L87 Difference]: Start difference. First operand 5263 states and 19072 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:49,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:49,927 INFO L93 Difference]: Finished difference Result 8516 states and 30518 transitions. [2021-06-05 15:44:49,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:44:49,928 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:44:49,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:49,946 INFO L225 Difference]: With dead ends: 8516 [2021-06-05 15:44:49,946 INFO L226 Difference]: Without dead ends: 8417 [2021-06-05 15:44:49,947 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 472.4ms TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:44:49,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8417 states. [2021-06-05 15:44:50,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8417 to 5307. [2021-06-05 15:44:50,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5307 states, 5306 states have (on average 3.626460610629476) internal successors, (19242), 5306 states have internal predecessors, (19242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:50,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5307 states to 5307 states and 19242 transitions. [2021-06-05 15:44:50,135 INFO L78 Accepts]: Start accepts. Automaton has 5307 states and 19242 transitions. Word has length 30 [2021-06-05 15:44:50,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:50,136 INFO L482 AbstractCegarLoop]: Abstraction has 5307 states and 19242 transitions. [2021-06-05 15:44:50,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:50,136 INFO L276 IsEmpty]: Start isEmpty. Operand 5307 states and 19242 transitions. [2021-06-05 15:44:50,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:44:50,145 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:50,145 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:50,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:50,367 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:50,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:50,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1298274782, now seen corresponding path program 27 times [2021-06-05 15:44:50,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:50,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034472357] [2021-06-05 15:44:50,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:50,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:50,629 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:50,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:50,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034472357] [2021-06-05 15:44:50,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034472357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:50,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872838212] [2021-06-05 15:44:50,629 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 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 15:44:50,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:44:50,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:50,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:44:50,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:50,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 15:44:50,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:50,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:50,708 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:50,708 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:43 [2021-06-05 15:44:50,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-06-05 15:44:50,826 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:50,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:50,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:50,843 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:46 [2021-06-05 15:44:50,947 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:50,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 36 [2021-06-05 15:44:50,950 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:50,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:50,982 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:50,983 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:82 [2021-06-05 15:44:51,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:51,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:51,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:44:51,116 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:51,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:51,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:51,128 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:20 [2021-06-05 15:44:51,185 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:51,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872838212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:51,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:51,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-06-05 15:44:51,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989630269] [2021-06-05 15:44:51,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:44:51,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:51,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:44:51,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:44:51,186 INFO L87 Difference]: Start difference. First operand 5307 states and 19242 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:51,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:51,991 INFO L93 Difference]: Finished difference Result 7935 states and 28752 transitions. [2021-06-05 15:44:51,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:44:51,991 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:44:51,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:52,009 INFO L225 Difference]: With dead ends: 7935 [2021-06-05 15:44:52,009 INFO L226 Difference]: Without dead ends: 7914 [2021-06-05 15:44:52,010 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 869.1ms TimeCoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:44:52,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7914 states. [2021-06-05 15:44:52,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7914 to 5331. [2021-06-05 15:44:52,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5331 states, 5330 states have (on average 3.625140712945591) internal successors, (19322), 5330 states have internal predecessors, (19322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:52,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5331 states to 5331 states and 19322 transitions. [2021-06-05 15:44:52,097 INFO L78 Accepts]: Start accepts. Automaton has 5331 states and 19322 transitions. Word has length 30 [2021-06-05 15:44:52,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:52,097 INFO L482 AbstractCegarLoop]: Abstraction has 5331 states and 19322 transitions. [2021-06-05 15:44:52,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:52,097 INFO L276 IsEmpty]: Start isEmpty. Operand 5331 states and 19322 transitions. [2021-06-05 15:44:52,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:44:52,104 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:52,104 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:52,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-05 15:44:52,304 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:52,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:52,305 INFO L82 PathProgramCache]: Analyzing trace with hash -474552520, now seen corresponding path program 28 times [2021-06-05 15:44:52,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:52,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082398235] [2021-06-05 15:44:52,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:52,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:52,537 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:52,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:52,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082398235] [2021-06-05 15:44:52,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082398235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:52,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975032300] [2021-06-05 15:44:52,538 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 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 15:44:52,563 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:44:52,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:52,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:44:52,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:52,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 15:44:52,590 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:52,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:52,601 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:52,601 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:43 [2021-06-05 15:44:52,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:52,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2021-06-05 15:44:52,734 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:52,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:52,747 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:52,747 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:61, output treesize:56 [2021-06-05 15:44:52,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 15:44:52,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:52,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:52,796 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:52,796 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:33 [2021-06-05 15:44:52,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:52,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:52,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:44:52,830 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:52,837 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:52,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:52,838 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:17 [2021-06-05 15:44:52,891 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:52,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975032300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:52,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:52,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 15:44:52,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939035981] [2021-06-05 15:44:52,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:44:52,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:52,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:44:52,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:44:52,893 INFO L87 Difference]: Start difference. First operand 5331 states and 19322 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:53,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:53,888 INFO L93 Difference]: Finished difference Result 9749 states and 35110 transitions. [2021-06-05 15:44:53,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:44:53,889 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:44:53,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:53,913 INFO L225 Difference]: With dead ends: 9749 [2021-06-05 15:44:53,913 INFO L226 Difference]: Without dead ends: 9728 [2021-06-05 15:44:53,914 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 713.6ms TimeCoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:44:53,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9728 states. [2021-06-05 15:44:53,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9728 to 5333. [2021-06-05 15:44:53,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5333 states, 5332 states have (on average 3.624906226556639) internal successors, (19328), 5332 states have internal predecessors, (19328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:54,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5333 states to 5333 states and 19328 transitions. [2021-06-05 15:44:54,004 INFO L78 Accepts]: Start accepts. Automaton has 5333 states and 19328 transitions. Word has length 30 [2021-06-05 15:44:54,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:54,004 INFO L482 AbstractCegarLoop]: Abstraction has 5333 states and 19328 transitions. [2021-06-05 15:44:54,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:54,004 INFO L276 IsEmpty]: Start isEmpty. Operand 5333 states and 19328 transitions. [2021-06-05 15:44:54,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:44:54,011 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:54,011 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:54,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:54,212 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:54,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:54,212 INFO L82 PathProgramCache]: Analyzing trace with hash -122176830, now seen corresponding path program 29 times [2021-06-05 15:44:54,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:54,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194806475] [2021-06-05 15:44:54,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:54,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:54,449 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:54,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:54,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194806475] [2021-06-05 15:44:54,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194806475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:54,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773756535] [2021-06-05 15:44:54,449 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 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 15:44:54,478 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:44:54,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:54,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:44:54,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:54,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 15:44:54,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:54,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:54,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:54,548 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:39 [2021-06-05 15:44:54,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:54,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:54,700 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:44:54,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 38 [2021-06-05 15:44:54,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:54,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:54,716 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 1 xjuncts. [2021-06-05 15:44:54,716 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:58, output treesize:57 [2021-06-05 15:44:54,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:54,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 38 [2021-06-05 15:44:54,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:54,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:54,780 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 1 xjuncts. [2021-06-05 15:44:54,780 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:100, output treesize:57 [2021-06-05 15:44:54,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:54,844 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:54,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 45 [2021-06-05 15:44:54,852 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:44:54,901 INFO L628 ElimStorePlain]: treesize reduction 22, result has 62.7 percent of original size [2021-06-05 15:44:54,913 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:54,913 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:21 [2021-06-05 15:44:54,987 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:54,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773756535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:54,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:54,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 15:44:54,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787709743] [2021-06-05 15:44:54,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:44:54,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:54,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:44:54,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:44:54,989 INFO L87 Difference]: Start difference. First operand 5333 states and 19328 transitions. Second operand has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:56,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:56,370 INFO L93 Difference]: Finished difference Result 8721 states and 31251 transitions. [2021-06-05 15:44:56,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:44:56,370 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:44:56,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:56,385 INFO L225 Difference]: With dead ends: 8721 [2021-06-05 15:44:56,385 INFO L226 Difference]: Without dead ends: 8684 [2021-06-05 15:44:56,386 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 1069.5ms TimeCoverageRelationStatistics Valid=168, Invalid=1092, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:44:56,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8684 states. [2021-06-05 15:44:56,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8684 to 5338. [2021-06-05 15:44:56,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5338 states, 5337 states have (on average 3.6245081506464305) internal successors, (19344), 5337 states have internal predecessors, (19344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:56,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5338 states to 5338 states and 19344 transitions. [2021-06-05 15:44:56,479 INFO L78 Accepts]: Start accepts. Automaton has 5338 states and 19344 transitions. Word has length 30 [2021-06-05 15:44:56,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:56,479 INFO L482 AbstractCegarLoop]: Abstraction has 5338 states and 19344 transitions. [2021-06-05 15:44:56,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:56,479 INFO L276 IsEmpty]: Start isEmpty. Operand 5338 states and 19344 transitions. [2021-06-05 15:44:56,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:44:56,487 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:56,487 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:56,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:56,687 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:56,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:56,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1021403778, now seen corresponding path program 30 times [2021-06-05 15:44:56,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:56,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333723516] [2021-06-05 15:44:56,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:56,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:56,919 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:56,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:56,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333723516] [2021-06-05 15:44:56,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333723516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:56,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078184714] [2021-06-05 15:44:56,920 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 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 15:44:56,945 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:44:56,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:56,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:44:56,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:56,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 15:44:56,978 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:56,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:56,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:56,990 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:46 [2021-06-05 15:44:57,152 INFO L446 ElimStorePlain]: Different costs {0=[v_C_51], 2=[A]} [2021-06-05 15:44:57,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-06-05 15:44:57,156 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:57,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:57,177 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-06-05 15:44:57,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 31 [2021-06-05 15:44:57,184 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:57,196 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:57,197 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:57,197 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:55, output treesize:43 [2021-06-05 15:44:57,279 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:57,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 44 [2021-06-05 15:44:57,287 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:57,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:57,315 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 15:44:57,316 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:79 [2021-06-05 15:44:57,413 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:57,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078184714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:57,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:57,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 15:44:57,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275958159] [2021-06-05 15:44:57,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:44:57,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:57,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:44:57,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:44:57,414 INFO L87 Difference]: Start difference. First operand 5338 states and 19344 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:58,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:58,224 INFO L93 Difference]: Finished difference Result 8676 states and 31046 transitions. [2021-06-05 15:44:58,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:44:58,224 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:44:58,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:58,239 INFO L225 Difference]: With dead ends: 8676 [2021-06-05 15:44:58,239 INFO L226 Difference]: Without dead ends: 8655 [2021-06-05 15:44:58,239 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 673.1ms TimeCoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:44:58,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8655 states. [2021-06-05 15:44:58,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8655 to 5360. [2021-06-05 15:44:58,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5360 states, 5359 states have (on average 3.6215711886546) internal successors, (19408), 5359 states have internal predecessors, (19408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:58,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5360 states to 5360 states and 19408 transitions. [2021-06-05 15:44:58,354 INFO L78 Accepts]: Start accepts. Automaton has 5360 states and 19408 transitions. Word has length 30 [2021-06-05 15:44:58,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:58,354 INFO L482 AbstractCegarLoop]: Abstraction has 5360 states and 19408 transitions. [2021-06-05 15:44:58,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:58,354 INFO L276 IsEmpty]: Start isEmpty. Operand 5360 states and 19408 transitions. [2021-06-05 15:44:58,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:44:58,362 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:58,362 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:44:58,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 15:44:58,574 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:58,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:58,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1905225556, now seen corresponding path program 31 times [2021-06-05 15:44:58,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:58,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124108595] [2021-06-05 15:44:58,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:58,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:58,950 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:58,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:58,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124108595] [2021-06-05 15:44:58,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124108595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:58,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705554604] [2021-06-05 15:44:58,951 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 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 15:44:58,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:58,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:44:58,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:59,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 15:44:59,021 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:59,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:59,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:59,033 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:40 [2021-06-05 15:44:59,232 INFO L446 ElimStorePlain]: Different costs {1=[v_C_53], 3=[A]} [2021-06-05 15:44:59,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:59,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 15:44:59,238 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:59,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:59,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:59,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:59,267 INFO L354 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2021-06-05 15:44:59,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 33 [2021-06-05 15:44:59,269 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:59,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:59,282 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:59,283 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:64, output treesize:52 [2021-06-05 15:44:59,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:59,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 20 [2021-06-05 15:44:59,375 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:59,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:59,383 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:44:59,383 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:14 [2021-06-05 15:44:59,433 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:59,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705554604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:59,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:59,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-06-05 15:44:59,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663934643] [2021-06-05 15:44:59,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:44:59,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:59,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:44:59,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:44:59,435 INFO L87 Difference]: Start difference. First operand 5360 states and 19408 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:00,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:45:00,686 INFO L93 Difference]: Finished difference Result 8842 states and 31468 transitions. [2021-06-05 15:45:00,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:45:00,686 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:45:00,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:45:00,701 INFO L225 Difference]: With dead ends: 8842 [2021-06-05 15:45:00,701 INFO L226 Difference]: Without dead ends: 8788 [2021-06-05 15:45:00,702 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1110.3ms TimeCoverageRelationStatistics Valid=168, Invalid=888, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:45:00,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8788 states. [2021-06-05 15:45:00,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8788 to 5359. [2021-06-05 15:45:00,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5359 states, 5358 states have (on average 3.625793206420306) internal successors, (19427), 5358 states have internal predecessors, (19427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:00,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5359 states to 5359 states and 19427 transitions. [2021-06-05 15:45:00,790 INFO L78 Accepts]: Start accepts. Automaton has 5359 states and 19427 transitions. Word has length 30 [2021-06-05 15:45:00,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:45:00,791 INFO L482 AbstractCegarLoop]: Abstraction has 5359 states and 19427 transitions. [2021-06-05 15:45:00,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:00,791 INFO L276 IsEmpty]: Start isEmpty. Operand 5359 states and 19427 transitions. [2021-06-05 15:45:00,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:45:00,798 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:45:00,798 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:45:01,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:45:01,013 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:45:01,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:45:01,013 INFO L82 PathProgramCache]: Analyzing trace with hash -280805828, now seen corresponding path program 32 times [2021-06-05 15:45:01,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:45:01,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005083484] [2021-06-05 15:45:01,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:45:01,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:45:01,262 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:01,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:45:01,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005083484] [2021-06-05 15:45:01,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005083484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:01,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567524] [2021-06-05 15:45:01,263 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 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 15:45:01,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:45:01,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:45:01,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:45:01,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:45:01,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 15:45:01,326 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:01,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:01,338 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:01,338 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:40 [2021-06-05 15:45:01,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-06-05 15:45:01,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:01,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:01,444 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:01,444 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:48 [2021-06-05 15:45:01,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2021-06-05 15:45:01,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:01,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:01,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:01,524 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:34 [2021-06-05 15:45:01,561 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-06-05 15:45:01,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 23 [2021-06-05 15:45:01,562 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:01,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:01,569 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:01,569 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:20 [2021-06-05 15:45:01,623 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:01,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:01,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:45:01,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 15:45:01,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88106238] [2021-06-05 15:45:01,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:45:01,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:45:01,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:45:01,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:45:01,624 INFO L87 Difference]: Start difference. First operand 5359 states and 19427 transitions. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:02,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:45:02,485 INFO L93 Difference]: Finished difference Result 9600 states and 34572 transitions. [2021-06-05 15:45:02,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:45:02,486 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:45:02,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:45:02,502 INFO L225 Difference]: With dead ends: 9600 [2021-06-05 15:45:02,502 INFO L226 Difference]: Without dead ends: 9579 [2021-06-05 15:45:02,503 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 693.0ms TimeCoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:45:02,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9579 states. [2021-06-05 15:45:02,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9579 to 5333. [2021-06-05 15:45:02,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5333 states, 5332 states have (on average 3.627344336084021) internal successors, (19341), 5332 states have internal predecessors, (19341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:02,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5333 states to 5333 states and 19341 transitions. [2021-06-05 15:45:02,595 INFO L78 Accepts]: Start accepts. Automaton has 5333 states and 19341 transitions. Word has length 30 [2021-06-05 15:45:02,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:45:02,595 INFO L482 AbstractCegarLoop]: Abstraction has 5333 states and 19341 transitions. [2021-06-05 15:45:02,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:02,595 INFO L276 IsEmpty]: Start isEmpty. Operand 5333 states and 19341 transitions. [2021-06-05 15:45:02,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:45:02,602 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:45:02,602 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:45:02,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-06-05 15:45:02,803 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:45:02,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:45:02,803 INFO L82 PathProgramCache]: Analyzing trace with hash -90435368, now seen corresponding path program 33 times [2021-06-05 15:45:02,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:45:02,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057035598] [2021-06-05 15:45:02,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:45:02,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:45:03,038 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:03,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:45:03,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057035598] [2021-06-05 15:45:03,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057035598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:03,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490233835] [2021-06-05 15:45:03,039 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 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 15:45:03,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:45:03,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:45:03,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:45:03,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:45:03,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 15:45:03,094 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:03,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:03,103 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:03,103 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:35 [2021-06-05 15:45:03,163 INFO L354 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2021-06-05 15:45:03,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2021-06-05 15:45:03,164 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:03,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:03,185 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 1 xjuncts. [2021-06-05 15:45:03,186 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:52 [2021-06-05 15:45:03,344 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 15:45:03,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 36 [2021-06-05 15:45:03,347 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:45:03,364 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:03,370 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 15:45:03,370 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:67, output treesize:66 [2021-06-05 15:45:03,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 15:45:03,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:03,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:03,468 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:03,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 28 [2021-06-05 15:45:03,472 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 15:45:03,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 15:45:03,475 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:03,511 INFO L628 ElimStorePlain]: treesize reduction 6, result has 88.5 percent of original size [2021-06-05 15:45:03,512 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 15:45:03,512 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:85, output treesize:43 [2021-06-05 15:45:03,626 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:03,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490233835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:03,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:45:03,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-06-05 15:45:03,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868721698] [2021-06-05 15:45:03,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:45:03,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:45:03,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:45:03,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:45:03,627 INFO L87 Difference]: Start difference. First operand 5333 states and 19341 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:06,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:45:06,335 INFO L93 Difference]: Finished difference Result 9517 states and 33779 transitions. [2021-06-05 15:45:06,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 15:45:06,335 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:45:06,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:45:06,352 INFO L225 Difference]: With dead ends: 9517 [2021-06-05 15:45:06,352 INFO L226 Difference]: Without dead ends: 9332 [2021-06-05 15:45:06,352 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1966.6ms TimeCoverageRelationStatistics Valid=312, Invalid=2138, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 15:45:06,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9332 states. [2021-06-05 15:45:06,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9332 to 5481. [2021-06-05 15:45:06,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5481 states, 5480 states have (on average 3.6350364963503647) internal successors, (19920), 5480 states have internal predecessors, (19920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:06,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5481 states to 5481 states and 19920 transitions. [2021-06-05 15:45:06,447 INFO L78 Accepts]: Start accepts. Automaton has 5481 states and 19920 transitions. Word has length 30 [2021-06-05 15:45:06,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:45:06,447 INFO L482 AbstractCegarLoop]: Abstraction has 5481 states and 19920 transitions. [2021-06-05 15:45:06,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:06,447 INFO L276 IsEmpty]: Start isEmpty. Operand 5481 states and 19920 transitions. [2021-06-05 15:45:06,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:45:06,455 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:45:06,455 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:45:06,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:45:06,657 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:45:06,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:45:06,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1157809070, now seen corresponding path program 34 times [2021-06-05 15:45:06,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:45:06,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102835666] [2021-06-05 15:45:06,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:45:06,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:45:06,879 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:06,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:45:06,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102835666] [2021-06-05 15:45:06,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102835666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:06,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55647240] [2021-06-05 15:45:06,880 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 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 15:45:07,005 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:45:07,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:45:07,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:45:07,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:45:07,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 15:45:07,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:07,041 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:07,042 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:07,042 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:40 [2021-06-05 15:45:07,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:07,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 15:45:07,104 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:07,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:07,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:07,116 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:52, output treesize:51 [2021-06-05 15:45:07,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:07,156 INFO L354 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2021-06-05 15:45:07,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 33 [2021-06-05 15:45:07,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:07,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:07,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:07,166 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:58, output treesize:48 [2021-06-05 15:45:07,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 28 [2021-06-05 15:45:07,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:07,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:07,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:07,226 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:20 [2021-06-05 15:45:07,288 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:07,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55647240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:07,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:45:07,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 15:45:07,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134693046] [2021-06-05 15:45:07,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:45:07,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:45:07,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:45:07,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:45:07,289 INFO L87 Difference]: Start difference. First operand 5481 states and 19920 transitions. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:08,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:45:08,057 INFO L93 Difference]: Finished difference Result 8596 states and 30994 transitions. [2021-06-05 15:45:08,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:45:08,058 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:45:08,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:45:08,072 INFO L225 Difference]: With dead ends: 8596 [2021-06-05 15:45:08,072 INFO L226 Difference]: Without dead ends: 8557 [2021-06-05 15:45:08,072 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 477.1ms TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:45:08,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8557 states. [2021-06-05 15:45:08,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8557 to 5445. [2021-06-05 15:45:08,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5445 states, 5444 states have (on average 3.635194709772226) internal successors, (19790), 5444 states have internal predecessors, (19790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:08,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5445 states to 5445 states and 19790 transitions. [2021-06-05 15:45:08,156 INFO L78 Accepts]: Start accepts. Automaton has 5445 states and 19790 transitions. Word has length 30 [2021-06-05 15:45:08,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:45:08,156 INFO L482 AbstractCegarLoop]: Abstraction has 5445 states and 19790 transitions. [2021-06-05 15:45:08,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:08,156 INFO L276 IsEmpty]: Start isEmpty. Operand 5445 states and 19790 transitions. [2021-06-05 15:45:08,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:45:08,163 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:45:08,163 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:45:08,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-06-05 15:45:08,364 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:45:08,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:45:08,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1894214378, now seen corresponding path program 35 times [2021-06-05 15:45:08,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:45:08,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845603662] [2021-06-05 15:45:08,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:45:08,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:45:08,527 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:08,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:45:08,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845603662] [2021-06-05 15:45:08,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845603662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:08,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586087672] [2021-06-05 15:45:08,527 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 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 15:45:08,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:45:08,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:45:08,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:45:08,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:45:08,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 15:45:08,609 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:08,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:08,620 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:08,620 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:30 [2021-06-05 15:45:08,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:08,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2021-06-05 15:45:08,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:08,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:08,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:08,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2021-06-05 15:45:08,815 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:08,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:08,821 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:08,821 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:55, output treesize:30 [2021-06-05 15:45:08,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:45:08,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:08,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:08,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:08,854 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:12 [2021-06-05 15:45:08,902 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:08,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586087672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:08,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:45:08,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 15:45:08,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35774292] [2021-06-05 15:45:08,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:45:08,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:45:08,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:45:08,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:45:08,903 INFO L87 Difference]: Start difference. First operand 5445 states and 19790 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:09,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:45:09,457 INFO L93 Difference]: Finished difference Result 5910 states and 21216 transitions. [2021-06-05 15:45:09,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:45:09,458 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:45:09,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:45:09,467 INFO L225 Difference]: With dead ends: 5910 [2021-06-05 15:45:09,467 INFO L226 Difference]: Without dead ends: 5889 [2021-06-05 15:45:09,467 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 468.3ms TimeCoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:45:09,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5889 states. [2021-06-05 15:45:09,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5889 to 5461. [2021-06-05 15:45:09,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5461 states, 5460 states have (on average 3.635164835164835) internal successors, (19848), 5460 states have internal predecessors, (19848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:09,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5461 states to 5461 states and 19848 transitions. [2021-06-05 15:45:09,538 INFO L78 Accepts]: Start accepts. Automaton has 5461 states and 19848 transitions. Word has length 30 [2021-06-05 15:45:09,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:45:09,538 INFO L482 AbstractCegarLoop]: Abstraction has 5461 states and 19848 transitions. [2021-06-05 15:45:09,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:09,538 INFO L276 IsEmpty]: Start isEmpty. Operand 5461 states and 19848 transitions. [2021-06-05 15:45:09,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:45:09,545 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:45:09,545 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:45:09,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-05 15:45:09,746 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:45:09,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:45:09,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1851082550, now seen corresponding path program 36 times [2021-06-05 15:45:09,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:45:09,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659979009] [2021-06-05 15:45:09,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:45:09,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:45:09,897 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:09,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:45:09,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659979009] [2021-06-05 15:45:09,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659979009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:09,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34970726] [2021-06-05 15:45:09,898 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 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 15:45:09,931 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:45:09,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:45:09,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:45:09,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:45:09,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 15:45:09,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:09,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:09,981 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:09,981 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 15:45:10,141 INFO L354 Elim1Store]: treesize reduction 64, result has 14.7 percent of original size [2021-06-05 15:45:10,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 81 [2021-06-05 15:45:10,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:10,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:10,159 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:10,159 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:107, output treesize:50 [2021-06-05 15:45:10,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:10,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 15:45:10,205 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:10,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:10,213 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:10,214 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:53, output treesize:31 [2021-06-05 15:45:10,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:45:10,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:10,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:10,257 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:10,257 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 15:45:10,316 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:10,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34970726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:10,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:45:10,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:45:10,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678221619] [2021-06-05 15:45:10,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:45:10,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:45:10,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:45:10,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:45:10,317 INFO L87 Difference]: Start difference. First operand 5461 states and 19848 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:11,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:45:11,002 INFO L93 Difference]: Finished difference Result 5947 states and 21347 transitions. [2021-06-05 15:45:11,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 15:45:11,003 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:45:11,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:45:11,013 INFO L225 Difference]: With dead ends: 5947 [2021-06-05 15:45:11,013 INFO L226 Difference]: Without dead ends: 5886 [2021-06-05 15:45:11,013 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 495.6ms TimeCoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:45:11,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5886 states. [2021-06-05 15:45:11,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5886 to 5494. [2021-06-05 15:45:11,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5494 states, 5493 states have (on average 3.6309848898598216) internal successors, (19945), 5493 states have internal predecessors, (19945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:11,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5494 states to 5494 states and 19945 transitions. [2021-06-05 15:45:11,089 INFO L78 Accepts]: Start accepts. Automaton has 5494 states and 19945 transitions. Word has length 30 [2021-06-05 15:45:11,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:45:11,089 INFO L482 AbstractCegarLoop]: Abstraction has 5494 states and 19945 transitions. [2021-06-05 15:45:11,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:11,090 INFO L276 IsEmpty]: Start isEmpty. Operand 5494 states and 19945 transitions. [2021-06-05 15:45:11,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:45:11,097 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:45:11,097 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:45:11,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-05 15:45:11,298 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:45:11,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:45:11,298 INFO L82 PathProgramCache]: Analyzing trace with hash 430630938, now seen corresponding path program 37 times [2021-06-05 15:45:11,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:45:11,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634283708] [2021-06-05 15:45:11,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:45:11,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:45:11,458 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:11,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:45:11,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634283708] [2021-06-05 15:45:11,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634283708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:11,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847563557] [2021-06-05 15:45:11,459 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 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 15:45:11,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:45:11,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:45:11,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:45:11,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 15:45:11,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:11,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:11,540 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:11,540 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 15:45:11,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:45:11,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:11,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2021-06-05 15:45:11,648 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:11,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:11,658 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:11,658 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:52 [2021-06-05 15:45:11,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:11,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 30 [2021-06-05 15:45:11,695 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:11,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:11,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:11,704 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:52, output treesize:27 [2021-06-05 15:45:11,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 15:45:11,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:11,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:11,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:11,745 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:12 [2021-06-05 15:45:11,802 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:11,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847563557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:11,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:45:11,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:45:11,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619160100] [2021-06-05 15:45:11,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:45:11,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:45:11,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:45:11,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:45:11,803 INFO L87 Difference]: Start difference. First operand 5494 states and 19945 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:12,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:45:12,466 INFO L93 Difference]: Finished difference Result 6183 states and 22092 transitions. [2021-06-05 15:45:12,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:45:12,467 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:45:12,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:45:12,477 INFO L225 Difference]: With dead ends: 6183 [2021-06-05 15:45:12,477 INFO L226 Difference]: Without dead ends: 6156 [2021-06-05 15:45:12,477 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 448.6ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:45:12,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6156 states. [2021-06-05 15:45:12,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6156 to 5494. [2021-06-05 15:45:12,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5494 states, 5493 states have (on average 3.6309848898598216) internal successors, (19945), 5493 states have internal predecessors, (19945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:12,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5494 states to 5494 states and 19945 transitions. [2021-06-05 15:45:12,555 INFO L78 Accepts]: Start accepts. Automaton has 5494 states and 19945 transitions. Word has length 30 [2021-06-05 15:45:12,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:45:12,555 INFO L482 AbstractCegarLoop]: Abstraction has 5494 states and 19945 transitions. [2021-06-05 15:45:12,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:12,555 INFO L276 IsEmpty]: Start isEmpty. Operand 5494 states and 19945 transitions. [2021-06-05 15:45:12,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:45:12,562 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:45:12,562 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:45:12,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 15:45:12,764 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:45:12,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:45:12,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1729453130, now seen corresponding path program 38 times [2021-06-05 15:45:12,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:45:12,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472069589] [2021-06-05 15:45:12,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:45:12,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:45:12,890 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:12,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:45:12,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472069589] [2021-06-05 15:45:12,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472069589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:12,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521244171] [2021-06-05 15:45:12,890 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 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 15:45:12,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:45:12,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:45:12,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:45:12,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:45:12,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 15:45:12,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:12,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:12,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:12,968 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 15:45:13,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:13,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-06-05 15:45:13,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:13,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:13,058 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:13,058 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:52, output treesize:52 [2021-06-05 15:45:13,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:13,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 15:45:13,109 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:13,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:13,118 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:13,118 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:52, output treesize:30 [2021-06-05 15:45:13,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:45:13,189 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:13,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:13,194 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:13,195 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 15:45:13,260 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:13,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521244171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:13,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:45:13,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:45:13,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379602624] [2021-06-05 15:45:13,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:45:13,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:45:13,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:45:13,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:45:13,262 INFO L87 Difference]: Start difference. First operand 5494 states and 19945 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:13,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:45:13,981 INFO L93 Difference]: Finished difference Result 5936 states and 21233 transitions. [2021-06-05 15:45:13,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 15:45:13,981 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:45:13,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:45:13,990 INFO L225 Difference]: With dead ends: 5936 [2021-06-05 15:45:13,991 INFO L226 Difference]: Without dead ends: 5909 [2021-06-05 15:45:13,991 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 400.7ms TimeCoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:45:13,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5909 states. [2021-06-05 15:45:14,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5909 to 5540. [2021-06-05 15:45:14,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5540 states, 5539 states have (on average 3.6268279472829033) internal successors, (20089), 5539 states have internal predecessors, (20089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:14,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5540 states to 5540 states and 20089 transitions. [2021-06-05 15:45:14,065 INFO L78 Accepts]: Start accepts. Automaton has 5540 states and 20089 transitions. Word has length 30 [2021-06-05 15:45:14,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:45:14,065 INFO L482 AbstractCegarLoop]: Abstraction has 5540 states and 20089 transitions. [2021-06-05 15:45:14,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:14,065 INFO L276 IsEmpty]: Start isEmpty. Operand 5540 states and 20089 transitions. [2021-06-05 15:45:14,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:45:14,073 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:45:14,073 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:45:14,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:45:14,273 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:45:14,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:45:14,274 INFO L82 PathProgramCache]: Analyzing trace with hash -983852134, now seen corresponding path program 39 times [2021-06-05 15:45:14,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:45:14,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710159579] [2021-06-05 15:45:14,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:45:14,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:45:14,411 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:14,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:45:14,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710159579] [2021-06-05 15:45:14,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710159579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:14,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499161422] [2021-06-05 15:45:14,413 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 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 15:45:14,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:45:14,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:45:14,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:45:14,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:45:14,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 15:45:14,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:14,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:14,505 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:14,505 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:22 [2021-06-05 15:45:14,605 INFO L354 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2021-06-05 15:45:14,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2021-06-05 15:45:14,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:14,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:14,624 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 1 xjuncts. [2021-06-05 15:45:14,624 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:44 [2021-06-05 15:45:14,750 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-05 15:45:14,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 39 [2021-06-05 15:45:14,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:14,768 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:14,788 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 15:45:14,788 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:53, output treesize:117 [2021-06-05 15:45:15,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:15,032 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:15,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-06-05 15:45:15,034 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:45:15,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:15,047 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:15,047 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:42 [2021-06-05 15:45:15,163 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:15,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499161422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:15,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:45:15,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 23 [2021-06-05 15:45:15,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723852527] [2021-06-05 15:45:15,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:45:15,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:45:15,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:45:15,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:45:15,164 INFO L87 Difference]: Start difference. First operand 5540 states and 20089 transitions. Second operand has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:17,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:45:17,124 INFO L93 Difference]: Finished difference Result 6092 states and 21727 transitions. [2021-06-05 15:45:17,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:45:17,125 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:45:17,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:45:17,134 INFO L225 Difference]: With dead ends: 6092 [2021-06-05 15:45:17,134 INFO L226 Difference]: Without dead ends: 6050 [2021-06-05 15:45:17,135 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1430.3ms TimeCoverageRelationStatistics Valid=235, Invalid=2117, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 15:45:17,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6050 states. [2021-06-05 15:45:17,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6050 to 5604. [2021-06-05 15:45:17,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5604 states, 5603 states have (on average 3.6234160271283242) internal successors, (20302), 5603 states have internal predecessors, (20302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:17,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5604 states to 5604 states and 20302 transitions. [2021-06-05 15:45:17,208 INFO L78 Accepts]: Start accepts. Automaton has 5604 states and 20302 transitions. Word has length 30 [2021-06-05 15:45:17,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:45:17,208 INFO L482 AbstractCegarLoop]: Abstraction has 5604 states and 20302 transitions. [2021-06-05 15:45:17,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:17,208 INFO L276 IsEmpty]: Start isEmpty. Operand 5604 states and 20302 transitions. [2021-06-05 15:45:17,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:45:17,215 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:45:17,216 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:45:17,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 15:45:17,417 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:45:17,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:45:17,417 INFO L82 PathProgramCache]: Analyzing trace with hash -591880358, now seen corresponding path program 40 times [2021-06-05 15:45:17,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:45:17,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240831823] [2021-06-05 15:45:17,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:45:17,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:45:17,549 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:17,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:45:17,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240831823] [2021-06-05 15:45:17,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240831823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:17,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627935875] [2021-06-05 15:45:17,549 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 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 15:45:17,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:45:17,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:45:17,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:45:17,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:45:17,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 15:45:17,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:17,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:17,637 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:17,637 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 15:45:17,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:17,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-06-05 15:45:17,713 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:17,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:17,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:17,723 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:47 [2021-06-05 15:45:17,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:17,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 15:45:17,785 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:17,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:17,792 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:17,793 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:36 [2021-06-05 15:45:17,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:45:17,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:17,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:17,826 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:17,826 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 15:45:17,877 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:17,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627935875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:17,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:45:17,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:45:17,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224115438] [2021-06-05 15:45:17,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:45:17,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:45:17,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:45:17,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:45:17,878 INFO L87 Difference]: Start difference. First operand 5604 states and 20302 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:18,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:45:18,500 INFO L93 Difference]: Finished difference Result 6276 states and 22438 transitions. [2021-06-05 15:45:18,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:45:18,502 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:45:18,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:45:18,512 INFO L225 Difference]: With dead ends: 6276 [2021-06-05 15:45:18,512 INFO L226 Difference]: Without dead ends: 6245 [2021-06-05 15:45:18,512 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 417.3ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:45:18,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6245 states. [2021-06-05 15:45:18,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6245 to 5600. [2021-06-05 15:45:18,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5600 states, 5599 states have (on average 3.6235041971780677) internal successors, (20288), 5599 states have internal predecessors, (20288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:18,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5600 states to 5600 states and 20288 transitions. [2021-06-05 15:45:18,587 INFO L78 Accepts]: Start accepts. Automaton has 5600 states and 20288 transitions. Word has length 30 [2021-06-05 15:45:18,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:45:18,587 INFO L482 AbstractCegarLoop]: Abstraction has 5600 states and 20288 transitions. [2021-06-05 15:45:18,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:18,587 INFO L276 IsEmpty]: Start isEmpty. Operand 5600 states and 20288 transitions. [2021-06-05 15:45:18,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:45:18,595 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:45:18,595 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:45:18,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:45:18,796 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:45:18,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:45:18,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1776448930, now seen corresponding path program 41 times [2021-06-05 15:45:18,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:45:18,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375398939] [2021-06-05 15:45:18,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:45:18,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:45:18,931 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:18,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:45:18,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375398939] [2021-06-05 15:45:18,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375398939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:18,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520662825] [2021-06-05 15:45:18,931 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 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 15:45:18,970 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:45:18,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:45:18,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:45:18,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:45:19,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 15:45:19,008 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:19,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:19,018 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:19,018 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 15:45:19,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:19,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:19,164 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:45:19,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 38 [2021-06-05 15:45:19,165 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:19,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:19,180 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 1 xjuncts. [2021-06-05 15:45:19,181 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:51 [2021-06-05 15:45:19,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:19,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:19,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:19,364 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:19,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 80 [2021-06-05 15:45:19,369 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:45:19,394 INFO L628 ElimStorePlain]: treesize reduction 3, result has 95.7 percent of original size [2021-06-05 15:45:19,398 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 1 xjuncts. [2021-06-05 15:45:19,399 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:93, output treesize:67 [2021-06-05 15:45:19,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:19,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:19,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:19,500 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:19,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 62 [2021-06-05 15:45:19,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:19,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:19,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 20 [2021-06-05 15:45:19,513 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:19,538 INFO L628 ElimStorePlain]: treesize reduction 5, result has 87.5 percent of original size [2021-06-05 15:45:19,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:45:19,539 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:116, output treesize:20 [2021-06-05 15:45:19,610 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:19,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520662825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:19,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:45:19,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 21 [2021-06-05 15:45:19,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178409226] [2021-06-05 15:45:19,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:45:19,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:45:19,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:45:19,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:45:19,611 INFO L87 Difference]: Start difference. First operand 5600 states and 20288 transitions. Second operand has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:20,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:45:20,945 INFO L93 Difference]: Finished difference Result 6547 states and 23225 transitions. [2021-06-05 15:45:20,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:45:20,946 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:45:20,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:45:20,956 INFO L225 Difference]: With dead ends: 6547 [2021-06-05 15:45:20,956 INFO L226 Difference]: Without dead ends: 6526 [2021-06-05 15:45:20,956 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 956.0ms TimeCoverageRelationStatistics Valid=134, Invalid=1126, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:45:20,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6526 states. [2021-06-05 15:45:21,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6526 to 5645. [2021-06-05 15:45:21,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5645 states, 5644 states have (on average 3.6210134656272146) internal successors, (20437), 5644 states have internal predecessors, (20437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:21,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5645 states to 5645 states and 20437 transitions. [2021-06-05 15:45:21,030 INFO L78 Accepts]: Start accepts. Automaton has 5645 states and 20437 transitions. Word has length 30 [2021-06-05 15:45:21,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:45:21,030 INFO L482 AbstractCegarLoop]: Abstraction has 5645 states and 20437 transitions. [2021-06-05 15:45:21,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:21,030 INFO L276 IsEmpty]: Start isEmpty. Operand 5645 states and 20437 transitions. [2021-06-05 15:45:21,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:45:21,038 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:45:21,038 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:45:21,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:45:21,238 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:45:21,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:45:21,238 INFO L82 PathProgramCache]: Analyzing trace with hash -808388724, now seen corresponding path program 42 times [2021-06-05 15:45:21,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:45:21,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108389357] [2021-06-05 15:45:21,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:45:21,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:45:21,394 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:21,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:45:21,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108389357] [2021-06-05 15:45:21,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108389357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:21,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744299510] [2021-06-05 15:45:21,394 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 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 15:45:21,433 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:45:21,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:45:21,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:45:21,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:45:21,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 15:45:21,474 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:21,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:21,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:21,483 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 15:45:21,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:21,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 15:45:21,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:21,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:21,608 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:21,608 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:43 [2021-06-05 15:45:21,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:21,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2021-06-05 15:45:21,654 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:21,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:21,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:21,661 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:30 [2021-06-05 15:45:21,776 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:21,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 15:45:21,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:45:21,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:21,800 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:21,801 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:93 [2021-06-05 15:45:21,896 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:21,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744299510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:21,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:45:21,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2021-06-05 15:45:21,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927937534] [2021-06-05 15:45:21,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:45:21,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:45:21,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:45:21,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:45:21,897 INFO L87 Difference]: Start difference. First operand 5645 states and 20437 transitions. Second operand has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:22,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:45:22,874 INFO L93 Difference]: Finished difference Result 6011 states and 21494 transitions. [2021-06-05 15:45:22,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:45:22,874 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:45:22,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:45:22,884 INFO L225 Difference]: With dead ends: 6011 [2021-06-05 15:45:22,884 INFO L226 Difference]: Without dead ends: 5996 [2021-06-05 15:45:22,884 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 639.3ms TimeCoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:45:22,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5996 states. [2021-06-05 15:45:22,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5996 to 5641. [2021-06-05 15:45:22,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5641 states, 5640 states have (on average 3.621099290780142) internal successors, (20423), 5640 states have internal predecessors, (20423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:22,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5641 states to 5641 states and 20423 transitions. [2021-06-05 15:45:22,983 INFO L78 Accepts]: Start accepts. Automaton has 5641 states and 20423 transitions. Word has length 30 [2021-06-05 15:45:22,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:45:22,983 INFO L482 AbstractCegarLoop]: Abstraction has 5641 states and 20423 transitions. [2021-06-05 15:45:22,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:22,983 INFO L276 IsEmpty]: Start isEmpty. Operand 5641 states and 20423 transitions. [2021-06-05 15:45:22,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:45:22,991 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:45:22,991 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:45:23,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:45:23,192 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:45:23,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:45:23,193 INFO L82 PathProgramCache]: Analyzing trace with hash 935479658, now seen corresponding path program 43 times [2021-06-05 15:45:23,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:45:23,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765004287] [2021-06-05 15:45:23,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:45:23,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:45:23,357 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:23,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:45:23,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765004287] [2021-06-05 15:45:23,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765004287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:23,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776920740] [2021-06-05 15:45:23,358 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 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 15:45:23,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:45:23,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:45:23,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:45:23,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 15:45:23,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:23,437 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:23,438 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:23,438 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 15:45:23,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:23,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2021-06-05 15:45:23,573 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:23,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:23,588 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:23,588 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:52 [2021-06-05 15:45:23,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:23,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 15:45:23,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:23,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:23,652 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:23,652 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:36 [2021-06-05 15:45:23,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:45:23,724 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:23,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:23,730 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:23,730 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 15:45:23,767 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:23,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776920740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:23,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:45:23,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:45:23,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913255643] [2021-06-05 15:45:23,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:45:23,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:45:23,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:45:23,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:45:23,768 INFO L87 Difference]: Start difference. First operand 5641 states and 20423 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:24,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:45:24,299 INFO L93 Difference]: Finished difference Result 6001 states and 21514 transitions. [2021-06-05 15:45:24,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 15:45:24,299 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:45:24,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:45:24,309 INFO L225 Difference]: With dead ends: 6001 [2021-06-05 15:45:24,309 INFO L226 Difference]: Without dead ends: 5962 [2021-06-05 15:45:24,309 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 453.8ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:45:24,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5962 states. [2021-06-05 15:45:24,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5962 to 5666. [2021-06-05 15:45:24,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5666 states, 5665 states have (on average 3.6180052956751987) internal successors, (20496), 5665 states have internal predecessors, (20496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:24,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5666 states to 5666 states and 20496 transitions. [2021-06-05 15:45:24,378 INFO L78 Accepts]: Start accepts. Automaton has 5666 states and 20496 transitions. Word has length 30 [2021-06-05 15:45:24,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:45:24,378 INFO L482 AbstractCegarLoop]: Abstraction has 5666 states and 20496 transitions. [2021-06-05 15:45:24,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:24,378 INFO L276 IsEmpty]: Start isEmpty. Operand 5666 states and 20496 transitions. [2021-06-05 15:45:24,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:45:24,385 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:45:24,385 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:45:24,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:45:24,585 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:45:24,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:45:24,586 INFO L82 PathProgramCache]: Analyzing trace with hash -837347644, now seen corresponding path program 44 times [2021-06-05 15:45:24,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:45:24,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350208893] [2021-06-05 15:45:24,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:45:24,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:45:24,740 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:24,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:45:24,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350208893] [2021-06-05 15:45:24,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350208893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:24,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498229079] [2021-06-05 15:45:24,741 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 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 15:45:24,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:45:24,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:45:24,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:45:24,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:45:24,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 15:45:24,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:24,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:24,827 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:24,828 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 15:45:24,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:45:24,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2021-06-05 15:45:24,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:24,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:24,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:24,948 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:41 [2021-06-05 15:45:24,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2021-06-05 15:45:24,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:24,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:24,988 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:24,988 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:25 [2021-06-05 15:45:25,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:45:25,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:25,016 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:25,017 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:25,017 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 15:45:25,066 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:25,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498229079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:25,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:45:25,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:45:25,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838928530] [2021-06-05 15:45:25,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:45:25,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:45:25,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:45:25,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:45:25,067 INFO L87 Difference]: Start difference. First operand 5666 states and 20496 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:25,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:45:25,726 INFO L93 Difference]: Finished difference Result 6100 states and 21835 transitions. [2021-06-05 15:45:25,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:45:25,726 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:45:25,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:45:25,737 INFO L225 Difference]: With dead ends: 6100 [2021-06-05 15:45:25,737 INFO L226 Difference]: Without dead ends: 6048 [2021-06-05 15:45:25,737 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 508.8ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:45:25,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6048 states. [2021-06-05 15:45:25,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6048 to 5660. [2021-06-05 15:45:25,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5660 states, 5659 states have (on average 3.618660540731578) internal successors, (20478), 5659 states have internal predecessors, (20478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:25,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5660 states to 5660 states and 20478 transitions. [2021-06-05 15:45:25,837 INFO L78 Accepts]: Start accepts. Automaton has 5660 states and 20478 transitions. Word has length 30 [2021-06-05 15:45:25,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:45:25,837 INFO L482 AbstractCegarLoop]: Abstraction has 5660 states and 20478 transitions. [2021-06-05 15:45:25,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:25,837 INFO L276 IsEmpty]: Start isEmpty. Operand 5660 states and 20478 transitions. [2021-06-05 15:45:25,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:45:25,845 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:45:25,845 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:45:26,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-05 15:45:26,045 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:45:26,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:45:26,046 INFO L82 PathProgramCache]: Analyzing trace with hash -484971954, now seen corresponding path program 45 times [2021-06-05 15:45:26,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:45:26,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356447199] [2021-06-05 15:45:26,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:45:26,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:45:26,189 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:26,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:45:26,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356447199] [2021-06-05 15:45:26,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356447199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:26,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072875343] [2021-06-05 15:45:26,190 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 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 15:45:26,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:45:26,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:45:26,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 15:45:26,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:45:26,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 15:45:26,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:26,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:26,267 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:26,267 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 15:45:26,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-06-05 15:45:26,382 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:26,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:26,395 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:26,395 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:38 [2021-06-05 15:45:26,487 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:26,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 36 [2021-06-05 15:45:26,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:26,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:26,514 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:26,514 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:75 [2021-06-05 15:45:26,584 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:26,585 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 21 [2021-06-05 15:45:26,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:26,597 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:26,597 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 14 [2021-06-05 15:45:26,598 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 15:45:26,612 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:26,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:45:26,615 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 15:45:26,685 INFO L628 ElimStorePlain]: treesize reduction 18, result has 83.5 percent of original size [2021-06-05 15:45:26,692 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 15:45:26,692 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:93, output treesize:100 [2021-06-05 15:45:26,843 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:26,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072875343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:26,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:45:26,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 21 [2021-06-05 15:45:26,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496621390] [2021-06-05 15:45:26,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:45:26,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:45:26,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:45:26,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:45:26,844 INFO L87 Difference]: Start difference. First operand 5660 states and 20478 transitions. Second operand has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:28,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:45:28,409 INFO L93 Difference]: Finished difference Result 6800 states and 23987 transitions. [2021-06-05 15:45:28,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:45:28,410 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:45:28,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:45:28,422 INFO L225 Difference]: With dead ends: 6800 [2021-06-05 15:45:28,422 INFO L226 Difference]: Without dead ends: 6773 [2021-06-05 15:45:28,423 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1198.3ms TimeCoverageRelationStatistics Valid=161, Invalid=1321, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:45:28,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6773 states. [2021-06-05 15:45:28,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6773 to 5650. [2021-06-05 15:45:28,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5650 states, 5649 states have (on average 3.6204637989024606) internal successors, (20452), 5649 states have internal predecessors, (20452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:28,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5650 states to 5650 states and 20452 transitions. [2021-06-05 15:45:28,504 INFO L78 Accepts]: Start accepts. Automaton has 5650 states and 20452 transitions. Word has length 30 [2021-06-05 15:45:28,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:45:28,504 INFO L482 AbstractCegarLoop]: Abstraction has 5650 states and 20452 transitions. [2021-06-05 15:45:28,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:28,504 INFO L276 IsEmpty]: Start isEmpty. Operand 5650 states and 20452 transitions. [2021-06-05 15:45:28,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:45:28,511 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:45:28,511 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:45:28,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:45:28,712 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:45:28,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:45:28,712 INFO L82 PathProgramCache]: Analyzing trace with hash 987993216, now seen corresponding path program 46 times [2021-06-05 15:45:28,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:45:28,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652920492] [2021-06-05 15:45:28,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:45:28,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:45:28,959 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:28,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:45:28,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652920492] [2021-06-05 15:45:28,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652920492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:28,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664396337] [2021-06-05 15:45:28,960 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 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 15:45:28,996 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:45:28,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:45:28,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:45:28,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:45:29,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 15:45:29,019 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:29,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:29,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:29,028 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 15:45:29,199 INFO L446 ElimStorePlain]: Different costs {0=[A], 1=[v_C_83]} [2021-06-05 15:45:29,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 32 [2021-06-05 15:45:29,204 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 15:45:29,215 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:29,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:29,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2021-06-05 15:45:29,220 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:29,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:29,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:29,232 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:58, output treesize:43 [2021-06-05 15:45:29,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-06-05 15:45:29,267 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:29,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:29,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:29,274 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:17 [2021-06-05 15:45:29,309 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:29,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664396337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:29,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:45:29,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 15:45:29,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685035121] [2021-06-05 15:45:29,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:45:29,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:45:29,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:45:29,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:45:29,310 INFO L87 Difference]: Start difference. First operand 5650 states and 20452 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:31,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:45:31,045 INFO L93 Difference]: Finished difference Result 9623 states and 34104 transitions. [2021-06-05 15:45:31,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:45:31,045 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:45:31,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:45:31,062 INFO L225 Difference]: With dead ends: 9623 [2021-06-05 15:45:31,063 INFO L226 Difference]: Without dead ends: 9565 [2021-06-05 15:45:31,063 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 1309.6ms TimeCoverageRelationStatistics Valid=262, Invalid=1298, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:45:31,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9565 states. [2021-06-05 15:45:31,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9565 to 5690. [2021-06-05 15:45:31,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5690 states, 5689 states have (on average 3.621023026894006) internal successors, (20600), 5689 states have internal predecessors, (20600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:31,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5690 states to 5690 states and 20600 transitions. [2021-06-05 15:45:31,161 INFO L78 Accepts]: Start accepts. Automaton has 5690 states and 20600 transitions. Word has length 30 [2021-06-05 15:45:31,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:45:31,161 INFO L482 AbstractCegarLoop]: Abstraction has 5690 states and 20600 transitions. [2021-06-05 15:45:31,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:31,161 INFO L276 IsEmpty]: Start isEmpty. Operand 5690 states and 20600 transitions. [2021-06-05 15:45:31,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:45:31,169 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:45:31,169 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:45:31,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:45:31,370 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:45:31,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:45:31,370 INFO L82 PathProgramCache]: Analyzing trace with hash 438322848, now seen corresponding path program 47 times [2021-06-05 15:45:31,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:45:31,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583106154] [2021-06-05 15:45:31,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:45:31,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:45:31,542 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:31,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:45:31,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583106154] [2021-06-05 15:45:31,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583106154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:31,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187001774] [2021-06-05 15:45:31,543 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 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 15:45:31,568 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:45:31,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:45:31,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:45:31,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:45:31,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 15:45:31,599 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:31,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:31,607 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:31,607 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 15:45:31,767 INFO L354 Elim1Store]: treesize reduction 62, result has 17.3 percent of original size [2021-06-05 15:45:31,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 83 [2021-06-05 15:45:31,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:31,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:31,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:31,779 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:107, output treesize:40 [2021-06-05 15:45:31,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:31,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:31,827 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:31,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 46 [2021-06-05 15:45:31,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:45:31,864 INFO L628 ElimStorePlain]: treesize reduction 33, result has 51.5 percent of original size [2021-06-05 15:45:31,869 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:31,869 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:34 [2021-06-05 15:45:31,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:45:31,944 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:31,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:31,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:31,948 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 15:45:32,016 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:32,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187001774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:32,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:45:32,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 15:45:32,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517926410] [2021-06-05 15:45:32,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:45:32,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:45:32,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:45:32,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:45:32,017 INFO L87 Difference]: Start difference. First operand 5690 states and 20600 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:33,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:45:33,141 INFO L93 Difference]: Finished difference Result 9282 states and 33218 transitions. [2021-06-05 15:45:33,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:45:33,141 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:45:33,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:45:33,156 INFO L225 Difference]: With dead ends: 9282 [2021-06-05 15:45:33,157 INFO L226 Difference]: Without dead ends: 9210 [2021-06-05 15:45:33,157 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 914.6ms TimeCoverageRelationStatistics Valid=201, Invalid=1205, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:45:33,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9210 states. [2021-06-05 15:45:33,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9210 to 5726. [2021-06-05 15:45:33,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5726 states, 5725 states have (on average 3.61764192139738) internal successors, (20711), 5725 states have internal predecessors, (20711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:33,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5726 states to 5726 states and 20711 transitions. [2021-06-05 15:45:33,249 INFO L78 Accepts]: Start accepts. Automaton has 5726 states and 20711 transitions. Word has length 30 [2021-06-05 15:45:33,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:45:33,249 INFO L482 AbstractCegarLoop]: Abstraction has 5726 states and 20711 transitions. [2021-06-05 15:45:33,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:33,250 INFO L276 IsEmpty]: Start isEmpty. Operand 5726 states and 20711 transitions. [2021-06-05 15:45:33,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:45:33,257 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:45:33,257 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:45:33,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:45:33,457 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:45:33,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:45:33,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1334504454, now seen corresponding path program 48 times [2021-06-05 15:45:33,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:45:33,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864536740] [2021-06-05 15:45:33,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:45:33,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:45:33,648 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:33,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:45:33,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864536740] [2021-06-05 15:45:33,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864536740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:33,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375464398] [2021-06-05 15:45:33,649 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 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 15:45:33,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:45:33,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:45:33,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:45:33,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:45:33,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 15:45:33,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:33,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:33,711 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:33,711 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 15:45:33,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:33,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2021-06-05 15:45:33,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:33,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:33,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:33,797 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:45 [2021-06-05 15:45:33,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 15:45:33,826 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:33,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:33,834 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:33,834 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-06-05 15:45:33,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 15:45:33,860 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:33,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:33,865 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:33,865 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:17 [2021-06-05 15:45:33,914 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:33,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375464398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:33,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:45:33,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 15:45:33,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928056752] [2021-06-05 15:45:33,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:45:33,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:45:33,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:45:33,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:45:33,915 INFO L87 Difference]: Start difference. First operand 5726 states and 20711 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:34,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:45:34,981 INFO L93 Difference]: Finished difference Result 11286 states and 40280 transitions. [2021-06-05 15:45:34,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:45:34,981 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:45:34,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:45:34,999 INFO L225 Difference]: With dead ends: 11286 [2021-06-05 15:45:35,000 INFO L226 Difference]: Without dead ends: 11232 [2021-06-05 15:45:35,000 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 747.8ms TimeCoverageRelationStatistics Valid=237, Invalid=1095, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:45:35,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11232 states. [2021-06-05 15:45:35,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11232 to 5720. [2021-06-05 15:45:35,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5720 states, 5719 states have (on average 3.6189893337996155) internal successors, (20697), 5719 states have internal predecessors, (20697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:35,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5720 states to 5720 states and 20697 transitions. [2021-06-05 15:45:35,098 INFO L78 Accepts]: Start accepts. Automaton has 5720 states and 20697 transitions. Word has length 30 [2021-06-05 15:45:35,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:45:35,099 INFO L482 AbstractCegarLoop]: Abstraction has 5720 states and 20697 transitions. [2021-06-05 15:45:35,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:35,099 INFO L276 IsEmpty]: Start isEmpty. Operand 5720 states and 20697 transitions. [2021-06-05 15:45:35,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:45:35,106 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:45:35,106 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:45:35,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-05 15:45:35,307 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:45:35,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:45:35,307 INFO L82 PathProgramCache]: Analyzing trace with hash -982128764, now seen corresponding path program 49 times [2021-06-05 15:45:35,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:45:35,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212891817] [2021-06-05 15:45:35,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:45:35,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:45:35,501 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:35,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:45:35,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212891817] [2021-06-05 15:45:35,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212891817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:35,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518539837] [2021-06-05 15:45:35,501 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 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 15:45:35,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:45:35,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:45:35,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:45:35,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 15:45:35,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:35,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:35,555 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:35,555 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 15:45:35,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:35,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2021-06-05 15:45:35,640 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:35,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:35,652 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:35,652 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:64, output treesize:55 [2021-06-05 15:45:35,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 23 [2021-06-05 15:45:35,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:35,692 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:35,692 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:35,692 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-06-05 15:45:35,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-06-05 15:45:35,716 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:35,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:35,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:35,721 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:17 [2021-06-05 15:45:35,772 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:35,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518539837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:35,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:45:35,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 15:45:35,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707666754] [2021-06-05 15:45:35,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:45:35,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:45:35,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:45:35,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:45:35,773 INFO L87 Difference]: Start difference. First operand 5720 states and 20697 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:37,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:45:37,146 INFO L93 Difference]: Finished difference Result 9882 states and 35134 transitions. [2021-06-05 15:45:37,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:45:37,146 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:45:37,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:45:37,163 INFO L225 Difference]: With dead ends: 9882 [2021-06-05 15:45:37,163 INFO L226 Difference]: Without dead ends: 9816 [2021-06-05 15:45:37,164 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 950.3ms TimeCoverageRelationStatistics Valid=251, Invalid=1231, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:45:37,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9816 states. [2021-06-05 15:45:37,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9816 to 5724. [2021-06-05 15:45:37,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5724 states, 5723 states have (on average 3.6194303686877514) internal successors, (20714), 5723 states have internal predecessors, (20714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:37,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5724 states to 5724 states and 20714 transitions. [2021-06-05 15:45:37,259 INFO L78 Accepts]: Start accepts. Automaton has 5724 states and 20714 transitions. Word has length 30 [2021-06-05 15:45:37,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:45:37,259 INFO L482 AbstractCegarLoop]: Abstraction has 5724 states and 20714 transitions. [2021-06-05 15:45:37,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:37,259 INFO L276 IsEmpty]: Start isEmpty. Operand 5724 states and 20714 transitions. [2021-06-05 15:45:37,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:45:37,267 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:45:37,267 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:45:37,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-06-05 15:45:37,467 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:45:37,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:45:37,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1881355712, now seen corresponding path program 50 times [2021-06-05 15:45:37,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:45:37,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793417716] [2021-06-05 15:45:37,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:45:37,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:45:37,683 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:37,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:45:37,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793417716] [2021-06-05 15:45:37,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793417716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:37,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595065207] [2021-06-05 15:45:37,683 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 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 15:45:37,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:45:37,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:45:37,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:45:37,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:45:37,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 15:45:37,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:37,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:37,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:37,744 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 15:45:37,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:37,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 35 [2021-06-05 15:45:37,888 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 15:45:37,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:37,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:37,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2021-06-05 15:45:37,902 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:37,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:37,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:37,912 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:47 [2021-06-05 15:45:37,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-06-05 15:45:37,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:37,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:37,946 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:37,946 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:17 [2021-06-05 15:45:37,975 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:37,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595065207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:37,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:45:37,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 15:45:37,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080220656] [2021-06-05 15:45:37,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:45:37,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:45:37,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:45:37,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:45:37,976 INFO L87 Difference]: Start difference. First operand 5724 states and 20714 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:38,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:45:38,905 INFO L93 Difference]: Finished difference Result 9332 states and 33363 transitions. [2021-06-05 15:45:38,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:45:38,907 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:45:38,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:45:38,923 INFO L225 Difference]: With dead ends: 9332 [2021-06-05 15:45:38,923 INFO L226 Difference]: Without dead ends: 9290 [2021-06-05 15:45:38,924 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 695.9ms TimeCoverageRelationStatistics Valid=140, Invalid=616, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:45:38,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9290 states. [2021-06-05 15:45:38,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9290 to 5749. [2021-06-05 15:45:39,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5749 states, 5748 states have (on average 3.6176061238691717) internal successors, (20794), 5748 states have internal predecessors, (20794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:39,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5749 states to 5749 states and 20794 transitions. [2021-06-05 15:45:39,014 INFO L78 Accepts]: Start accepts. Automaton has 5749 states and 20794 transitions. Word has length 30 [2021-06-05 15:45:39,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:45:39,014 INFO L482 AbstractCegarLoop]: Abstraction has 5749 states and 20794 transitions. [2021-06-05 15:45:39,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:39,014 INFO L276 IsEmpty]: Start isEmpty. Operand 5749 states and 20794 transitions. [2021-06-05 15:45:39,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:45:39,022 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:45:39,022 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:45:39,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:45:39,222 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:45:39,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:45:39,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1045273622, now seen corresponding path program 51 times [2021-06-05 15:45:39,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:45:39,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616611133] [2021-06-05 15:45:39,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:45:39,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:45:39,505 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:39,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:45:39,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616611133] [2021-06-05 15:45:39,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616611133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:39,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810798023] [2021-06-05 15:45:39,506 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 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 15:45:39,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:45:39,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:45:39,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:45:39,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:45:39,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 15:45:39,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:39,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:39,573 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:39,573 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 15:45:39,765 INFO L446 ElimStorePlain]: Different costs {2=[v_C_93], 3=[A]} [2021-06-05 15:45:39,789 INFO L354 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2021-06-05 15:45:39,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 70 [2021-06-05 15:45:39,792 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:39,837 INFO L628 ElimStorePlain]: treesize reduction 39, result has 58.9 percent of original size [2021-06-05 15:45:39,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:39,849 INFO L354 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2021-06-05 15:45:39,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 33 [2021-06-05 15:45:39,850 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:39,860 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:39,862 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 1 xjuncts. [2021-06-05 15:45:39,862 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:42 [2021-06-05 15:45:39,951 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-06-05 15:45:39,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 24 [2021-06-05 15:45:39,952 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:39,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:39,957 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:39,957 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:15 [2021-06-05 15:45:39,988 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:39,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810798023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:39,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:45:39,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-05 15:45:39,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881408056] [2021-06-05 15:45:39,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:45:39,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:45:39,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:45:39,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:45:39,989 INFO L87 Difference]: Start difference. First operand 5749 states and 20794 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:41,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:45:41,030 INFO L93 Difference]: Finished difference Result 9027 states and 32432 transitions. [2021-06-05 15:45:41,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:45:41,030 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:45:41,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:45:41,047 INFO L225 Difference]: With dead ends: 9027 [2021-06-05 15:45:41,047 INFO L226 Difference]: Without dead ends: 9000 [2021-06-05 15:45:41,047 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 825.7ms TimeCoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:45:41,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9000 states. [2021-06-05 15:45:41,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9000 to 5757. [2021-06-05 15:45:41,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5757 states, 5756 states have (on average 3.6179638637943015) internal successors, (20825), 5756 states have internal predecessors, (20825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:41,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5757 states to 5757 states and 20825 transitions. [2021-06-05 15:45:41,147 INFO L78 Accepts]: Start accepts. Automaton has 5757 states and 20825 transitions. Word has length 30 [2021-06-05 15:45:41,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:45:41,147 INFO L482 AbstractCegarLoop]: Abstraction has 5757 states and 20825 transitions. [2021-06-05 15:45:41,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:41,147 INFO L276 IsEmpty]: Start isEmpty. Operand 5757 states and 20825 transitions. [2021-06-05 15:45:41,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:45:41,155 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:45:41,155 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:45:41,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-06-05 15:45:41,356 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:45:41,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:45:41,356 INFO L82 PathProgramCache]: Analyzing trace with hash 323751962, now seen corresponding path program 52 times [2021-06-05 15:45:41,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:45:41,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086788523] [2021-06-05 15:45:41,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:45:41,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:45:41,584 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:41,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:45:41,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086788523] [2021-06-05 15:45:41,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086788523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:41,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279443906] [2021-06-05 15:45:41,585 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 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 15:45:41,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:45:41,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:45:41,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:45:41,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:45:41,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 15:45:41,645 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:41,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:41,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:41,654 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 15:45:41,817 INFO L446 ElimStorePlain]: Different costs {1=[v_C_95], 5=[A]} [2021-06-05 15:45:41,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:41,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 15:45:41,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:41,837 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:41,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:41,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:45:41,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 22 [2021-06-05 15:45:41,842 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:41,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:41,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:41,852 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:45, output treesize:26 [2021-06-05 15:45:41,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:45:41,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:41,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:41,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:41,911 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:12 [2021-06-05 15:45:41,940 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:41,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279443906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:41,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:45:41,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-06-05 15:45:41,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194495350] [2021-06-05 15:45:41,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:45:41,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:45:41,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:45:41,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:45:41,941 INFO L87 Difference]: Start difference. First operand 5757 states and 20825 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:44,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:45:44,164 INFO L93 Difference]: Finished difference Result 13617 states and 47037 transitions. [2021-06-05 15:45:44,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 15:45:44,165 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:45:44,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:45:44,188 INFO L225 Difference]: With dead ends: 13617 [2021-06-05 15:45:44,188 INFO L226 Difference]: Without dead ends: 13557 [2021-06-05 15:45:44,189 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1672.3ms TimeCoverageRelationStatistics Valid=468, Invalid=2184, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 15:45:44,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13557 states. [2021-06-05 15:45:44,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13557 to 5924. [2021-06-05 15:45:44,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5924 states, 5923 states have (on average 3.6265406044234343) internal successors, (21480), 5923 states have internal predecessors, (21480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:44,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5924 states to 5924 states and 21480 transitions. [2021-06-05 15:45:44,306 INFO L78 Accepts]: Start accepts. Automaton has 5924 states and 21480 transitions. Word has length 30 [2021-06-05 15:45:44,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:45:44,306 INFO L482 AbstractCegarLoop]: Abstraction has 5924 states and 21480 transitions. [2021-06-05 15:45:44,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:44,306 INFO L276 IsEmpty]: Start isEmpty. Operand 5924 states and 21480 transitions. [2021-06-05 15:45:44,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:45:44,314 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:45:44,314 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:45:44,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:45:44,514 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:45:44,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:45:44,515 INFO L82 PathProgramCache]: Analyzing trace with hash 470064310, now seen corresponding path program 53 times [2021-06-05 15:45:44,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:45:44,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466163439] [2021-06-05 15:45:44,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:45:44,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:45:44,728 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:44,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:45:44,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466163439] [2021-06-05 15:45:44,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466163439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:44,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772609393] [2021-06-05 15:45:44,729 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 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 15:45:44,756 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:45:44,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:45:44,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:45:44,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:45:44,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 15:45:44,780 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:44,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:44,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:44,789 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:34 [2021-06-05 15:45:44,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:44,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:44,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-06-05 15:45:44,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:44,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:44,900 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:44,900 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:72, output treesize:57 [2021-06-05 15:45:44,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:44,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 31 [2021-06-05 15:45:44,963 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:44,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:44,972 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:44,972 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:69, output treesize:47 [2021-06-05 15:45:45,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 15:45:45,030 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:45,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:45,035 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:45,035 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:17 [2021-06-05 15:45:45,067 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:45,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772609393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:45,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:45:45,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 15:45:45,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545246924] [2021-06-05 15:45:45,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:45:45,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:45:45,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:45:45,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:45:45,068 INFO L87 Difference]: Start difference. First operand 5924 states and 21480 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:45,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:45:45,998 INFO L93 Difference]: Finished difference Result 10078 states and 36082 transitions. [2021-06-05 15:45:45,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:45:45,998 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:45:45,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:45:46,015 INFO L225 Difference]: With dead ends: 10078 [2021-06-05 15:45:46,015 INFO L226 Difference]: Without dead ends: 9980 [2021-06-05 15:45:46,015 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 644.0ms TimeCoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:45:46,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9980 states. [2021-06-05 15:45:46,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9980 to 6302. [2021-06-05 15:45:46,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6302 states, 6301 states have (on average 3.6176797333756547) internal successors, (22795), 6301 states have internal predecessors, (22795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:46,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6302 states to 6302 states and 22795 transitions. [2021-06-05 15:45:46,117 INFO L78 Accepts]: Start accepts. Automaton has 6302 states and 22795 transitions. Word has length 30 [2021-06-05 15:45:46,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:45:46,117 INFO L482 AbstractCegarLoop]: Abstraction has 6302 states and 22795 transitions. [2021-06-05 15:45:46,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:46,117 INFO L276 IsEmpty]: Start isEmpty. Operand 6302 states and 22795 transitions. [2021-06-05 15:45:46,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:45:46,125 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:45:46,125 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:45:46,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:45:46,326 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:45:46,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:45:46,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1302762992, now seen corresponding path program 54 times [2021-06-05 15:45:46,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:45:46,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795698127] [2021-06-05 15:45:46,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:45:46,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:45:46,581 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:46,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:45:46,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795698127] [2021-06-05 15:45:46,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795698127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:46,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540819028] [2021-06-05 15:45:46,581 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 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 15:45:46,609 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:45:46,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:45:46,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:45:46,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:45:46,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 15:45:46,631 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:46,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:46,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:46,640 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 15:45:46,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:46,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:46,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-06-05 15:45:46,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:46,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:46,737 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:46,737 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:76, output treesize:53 [2021-06-05 15:45:46,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 15:45:46,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:46,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:46,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:46,811 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-06-05 15:45:46,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 15:45:46,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:46,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:46,842 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:46,843 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:17 [2021-06-05 15:45:46,894 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:46,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540819028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:46,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:45:46,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 15:45:46,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283245433] [2021-06-05 15:45:46,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:45:46,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:45:46,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:45:46,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:45:46,895 INFO L87 Difference]: Start difference. First operand 6302 states and 22795 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:47,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:45:47,972 INFO L93 Difference]: Finished difference Result 12838 states and 45680 transitions. [2021-06-05 15:45:47,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:45:47,972 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:45:47,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:45:47,997 INFO L225 Difference]: With dead ends: 12838 [2021-06-05 15:45:47,997 INFO L226 Difference]: Without dead ends: 12752 [2021-06-05 15:45:47,997 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 774.8ms TimeCoverageRelationStatistics Valid=157, Invalid=773, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:45:48,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12752 states. [2021-06-05 15:45:48,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12752 to 6296. [2021-06-05 15:45:48,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6296 states, 6295 states have (on average 3.6204924543288324) internal successors, (22791), 6295 states have internal predecessors, (22791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:48,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6296 states to 6296 states and 22791 transitions. [2021-06-05 15:45:48,129 INFO L78 Accepts]: Start accepts. Automaton has 6296 states and 22791 transitions. Word has length 30 [2021-06-05 15:45:48,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:45:48,129 INFO L482 AbstractCegarLoop]: Abstraction has 6296 states and 22791 transitions. [2021-06-05 15:45:48,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:48,129 INFO L276 IsEmpty]: Start isEmpty. Operand 6296 states and 22791 transitions. [2021-06-05 15:45:48,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:45:48,138 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:45:48,138 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:45:48,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:45:48,340 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:45:48,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:45:48,340 INFO L82 PathProgramCache]: Analyzing trace with hash -950387302, now seen corresponding path program 55 times [2021-06-05 15:45:48,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:45:48,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750492430] [2021-06-05 15:45:48,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:45:48,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:45:48,567 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:48,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:45:48,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750492430] [2021-06-05 15:45:48,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750492430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:48,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725818210] [2021-06-05 15:45:48,568 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 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 15:45:48,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:45:48,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:45:48,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:45:48,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 15:45:48,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:48,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:48,621 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:48,621 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 15:45:48,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:48,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:48,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-06-05 15:45:48,691 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:48,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:48,703 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:48,703 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:76, output treesize:53 [2021-06-05 15:45:48,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 15:45:48,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:48,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:48,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:48,795 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:34 [2021-06-05 15:45:48,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-06-05 15:45:48,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:48,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:48,834 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:48,834 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:17 [2021-06-05 15:45:48,903 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:48,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725818210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:48,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:45:48,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 15:45:48,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069628837] [2021-06-05 15:45:48,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:45:48,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:45:48,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:45:48,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:45:48,904 INFO L87 Difference]: Start difference. First operand 6296 states and 22791 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:49,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:45:49,888 INFO L93 Difference]: Finished difference Result 10684 states and 38096 transitions. [2021-06-05 15:45:49,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:45:49,888 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:45:49,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:45:49,906 INFO L225 Difference]: With dead ends: 10684 [2021-06-05 15:45:49,907 INFO L226 Difference]: Without dead ends: 10555 [2021-06-05 15:45:49,907 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 710.2ms TimeCoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:45:49,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10555 states. [2021-06-05 15:45:49,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10555 to 6248. [2021-06-05 15:45:50,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6248 states, 6247 states have (on average 3.6265407395549865) internal successors, (22655), 6247 states have internal predecessors, (22655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:50,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6248 states to 6248 states and 22655 transitions. [2021-06-05 15:45:50,017 INFO L78 Accepts]: Start accepts. Automaton has 6248 states and 22655 transitions. Word has length 30 [2021-06-05 15:45:50,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:45:50,017 INFO L482 AbstractCegarLoop]: Abstraction has 6248 states and 22655 transitions. [2021-06-05 15:45:50,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:50,017 INFO L276 IsEmpty]: Start isEmpty. Operand 6248 states and 22655 transitions. [2021-06-05 15:45:50,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:45:50,026 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:45:50,026 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:45:50,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:45:50,226 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:45:50,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:45:50,227 INFO L82 PathProgramCache]: Analyzing trace with hash -2017761004, now seen corresponding path program 56 times [2021-06-05 15:45:50,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:45:50,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758467851] [2021-06-05 15:45:50,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:45:50,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:45:50,481 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:50,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:45:50,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758467851] [2021-06-05 15:45:50,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758467851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:50,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374002206] [2021-06-05 15:45:50,482 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 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 15:45:50,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:45:50,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:45:50,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:45:50,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:45:50,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 15:45:50,527 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:50,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:50,535 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:50,535 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 15:45:50,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:50,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:50,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-06-05 15:45:50,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:50,624 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:50,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:50,624 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:81, output treesize:58 [2021-06-05 15:45:50,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:50,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 30 [2021-06-05 15:45:50,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:50,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:50,669 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:50,669 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:60, output treesize:45 [2021-06-05 15:45:50,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-06-05 15:45:50,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:50,733 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:50,733 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:50,733 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:17 [2021-06-05 15:45:50,788 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:50,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374002206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:50,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:45:50,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-05 15:45:50,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168794364] [2021-06-05 15:45:50,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:45:50,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:45:50,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:45:50,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:45:50,789 INFO L87 Difference]: Start difference. First operand 6248 states and 22655 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:51,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:45:51,510 INFO L93 Difference]: Finished difference Result 10506 states and 37441 transitions. [2021-06-05 15:45:51,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:45:51,510 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:45:51,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:45:51,528 INFO L225 Difference]: With dead ends: 10506 [2021-06-05 15:45:51,528 INFO L226 Difference]: Without dead ends: 10403 [2021-06-05 15:45:51,528 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 553.1ms TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:45:51,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10403 states. [2021-06-05 15:45:51,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10403 to 6290. [2021-06-05 15:45:51,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6290 states, 6289 states have (on average 3.6283987915407856) internal successors, (22819), 6289 states have internal predecessors, (22819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:51,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6290 states to 6290 states and 22819 transitions. [2021-06-05 15:45:51,629 INFO L78 Accepts]: Start accepts. Automaton has 6290 states and 22819 transitions. Word has length 30 [2021-06-05 15:45:51,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:45:51,629 INFO L482 AbstractCegarLoop]: Abstraction has 6290 states and 22819 transitions. [2021-06-05 15:45:51,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:51,629 INFO L276 IsEmpty]: Start isEmpty. Operand 6290 states and 22819 transitions. [2021-06-05 15:45:51,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:45:51,638 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:45:51,638 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:45:51,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-06-05 15:45:51,838 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:45:51,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:45:51,838 INFO L82 PathProgramCache]: Analyzing trace with hash 663932180, now seen corresponding path program 57 times [2021-06-05 15:45:51,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:45:51,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206438307] [2021-06-05 15:45:51,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:45:51,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:45:51,970 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:51,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:45:51,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206438307] [2021-06-05 15:45:51,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206438307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:51,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163226585] [2021-06-05 15:45:51,970 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 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 15:45:51,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:45:51,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:45:51,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:45:52,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:45:52,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 15:45:52,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:52,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:52,039 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:52,039 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 15:45:52,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-06-05 15:45:52,178 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:52,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:52,186 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:52,186 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:33 [2021-06-05 15:45:52,227 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:52,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 39 [2021-06-05 15:45:52,228 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:52,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:52,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:52,246 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:74 [2021-06-05 15:45:52,375 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:52,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 15:45:52,378 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:45:52,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:52,399 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:52,399 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:93 [2021-06-05 15:45:52,487 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:52,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163226585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:52,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:45:52,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 21 [2021-06-05 15:45:52,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653313255] [2021-06-05 15:45:52,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:45:52,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:45:52,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:45:52,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:45:52,488 INFO L87 Difference]: Start difference. First operand 6290 states and 22819 transitions. Second operand has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:53,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:45:53,405 INFO L93 Difference]: Finished difference Result 6817 states and 24383 transitions. [2021-06-05 15:45:53,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:45:53,405 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:45:53,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:45:53,416 INFO L225 Difference]: With dead ends: 6817 [2021-06-05 15:45:53,416 INFO L226 Difference]: Without dead ends: 6745 [2021-06-05 15:45:53,416 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 692.9ms TimeCoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:45:53,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6745 states. [2021-06-05 15:45:53,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6745 to 6296. [2021-06-05 15:45:53,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6296 states, 6295 states have (on average 3.627164416203336) internal successors, (22833), 6295 states have internal predecessors, (22833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:53,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6296 states to 6296 states and 22833 transitions. [2021-06-05 15:45:53,498 INFO L78 Accepts]: Start accepts. Automaton has 6296 states and 22833 transitions. Word has length 30 [2021-06-05 15:45:53,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:45:53,498 INFO L482 AbstractCegarLoop]: Abstraction has 6296 states and 22833 transitions. [2021-06-05 15:45:53,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:53,498 INFO L276 IsEmpty]: Start isEmpty. Operand 6296 states and 22833 transitions. [2021-06-05 15:45:53,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:45:53,506 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:45:53,507 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:45:53,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-06-05 15:45:53,707 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:45:53,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:45:53,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1055903956, now seen corresponding path program 58 times [2021-06-05 15:45:53,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:45:53,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112946927] [2021-06-05 15:45:53,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:45:53,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:45:53,865 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:53,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:45:53,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112946927] [2021-06-05 15:45:53,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112946927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:53,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886064804] [2021-06-05 15:45:53,865 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 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 15:45:53,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:45:53,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:45:53,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:45:53,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:45:53,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 15:45:53,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:53,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:53,928 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:53,929 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 15:45:54,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:45:54,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:54,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2021-06-05 15:45:54,021 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:54,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:54,032 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:54,032 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:50 [2021-06-05 15:45:54,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:54,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-06-05 15:45:54,071 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:54,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:54,079 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:54,079 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:59, output treesize:36 [2021-06-05 15:45:54,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:45:54,106 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:54,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:54,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:54,110 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 15:45:54,159 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:54,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886064804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:54,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:45:54,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:45:54,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358321495] [2021-06-05 15:45:54,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:45:54,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:45:54,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:45:54,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:45:54,161 INFO L87 Difference]: Start difference. First operand 6296 states and 22833 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:54,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:45:54,748 INFO L93 Difference]: Finished difference Result 6888 states and 24695 transitions. [2021-06-05 15:45:54,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:45:54,749 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:45:54,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:45:54,760 INFO L225 Difference]: With dead ends: 6888 [2021-06-05 15:45:54,760 INFO L226 Difference]: Without dead ends: 6845 [2021-06-05 15:45:54,760 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 404.7ms TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:45:54,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6845 states. [2021-06-05 15:45:54,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6845 to 6271. [2021-06-05 15:45:54,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6271 states, 6270 states have (on average 3.6299840510366828) internal successors, (22760), 6270 states have internal predecessors, (22760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:54,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6271 states to 6271 states and 22760 transitions. [2021-06-05 15:45:54,880 INFO L78 Accepts]: Start accepts. Automaton has 6271 states and 22760 transitions. Word has length 30 [2021-06-05 15:45:54,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:45:54,880 INFO L482 AbstractCegarLoop]: Abstraction has 6271 states and 22760 transitions. [2021-06-05 15:45:54,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:54,880 INFO L276 IsEmpty]: Start isEmpty. Operand 6271 states and 22760 transitions. [2021-06-05 15:45:54,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:45:54,889 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:45:54,889 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:45:55,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-06-05 15:45:55,089 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:45:55,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:45:55,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1559919772, now seen corresponding path program 59 times [2021-06-05 15:45:55,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:45:55,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751780966] [2021-06-05 15:45:55,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:45:55,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:45:55,242 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:55,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:45:55,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751780966] [2021-06-05 15:45:55,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751780966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:55,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396547592] [2021-06-05 15:45:55,243 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 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 15:45:55,269 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:45:55,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:45:55,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:45:55,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:45:55,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 15:45:55,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:55,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:55,316 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:55,316 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:34 [2021-06-05 15:45:55,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:55,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 15:45:55,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:55,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:55,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:55,442 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:46 [2021-06-05 15:45:55,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:55,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2021-06-05 15:45:55,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:55,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:55,504 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:55,504 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:30 [2021-06-05 15:45:55,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:45:55,588 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:55,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:55,593 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:55,593 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 15:45:55,626 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:55,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396547592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:55,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:45:55,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 15:45:55,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702153927] [2021-06-05 15:45:55,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:45:55,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:45:55,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:45:55,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:45:55,628 INFO L87 Difference]: Start difference. First operand 6271 states and 22760 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:56,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:45:56,097 INFO L93 Difference]: Finished difference Result 6494 states and 23388 transitions. [2021-06-05 15:45:56,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 15:45:56,098 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:45:56,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:45:56,108 INFO L225 Difference]: With dead ends: 6494 [2021-06-05 15:45:56,108 INFO L226 Difference]: Without dead ends: 6473 [2021-06-05 15:45:56,108 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 405.9ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:45:56,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6473 states. [2021-06-05 15:45:56,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6473 to 6277. [2021-06-05 15:45:56,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6277 states, 6276 states have (on average 3.6303377947737414) internal successors, (22784), 6276 states have internal predecessors, (22784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:56,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6277 states to 6277 states and 22784 transitions. [2021-06-05 15:45:56,191 INFO L78 Accepts]: Start accepts. Automaton has 6277 states and 22784 transitions. Word has length 30 [2021-06-05 15:45:56,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:45:56,191 INFO L482 AbstractCegarLoop]: Abstraction has 6277 states and 22784 transitions. [2021-06-05 15:45:56,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:56,191 INFO L276 IsEmpty]: Start isEmpty. Operand 6277 states and 22784 transitions. [2021-06-05 15:45:56,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:45:56,200 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:45:56,200 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:45:56,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-05 15:45:56,401 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:45:56,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:45:56,401 INFO L82 PathProgramCache]: Analyzing trace with hash -144940482, now seen corresponding path program 60 times [2021-06-05 15:45:56,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:45:56,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701878492] [2021-06-05 15:45:56,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:45:56,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:45:56,545 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:56,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:45:56,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701878492] [2021-06-05 15:45:56,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701878492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:56,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470365419] [2021-06-05 15:45:56,545 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 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 15:45:56,578 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:45:56,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:45:56,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:45:56,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:45:56,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 15:45:56,624 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:56,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:56,634 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:56,635 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 15:45:56,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:56,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-06-05 15:45:56,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:56,714 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:56,715 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:56,715 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:47 [2021-06-05 15:45:56,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:56,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2021-06-05 15:45:56,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:56,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:56,807 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:56,807 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:30 [2021-06-05 15:45:56,919 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:56,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 15:45:56,922 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:45:56,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:56,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:56,948 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:93 [2021-06-05 15:45:57,102 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:57,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470365419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:57,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:45:57,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 21 [2021-06-05 15:45:57,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302630156] [2021-06-05 15:45:57,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:45:57,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:45:57,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:45:57,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:45:57,103 INFO L87 Difference]: Start difference. First operand 6277 states and 22784 transitions. Second operand has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:58,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:45:58,171 INFO L93 Difference]: Finished difference Result 6929 states and 24693 transitions. [2021-06-05 15:45:58,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:45:58,172 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:45:58,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:45:58,182 INFO L225 Difference]: With dead ends: 6929 [2021-06-05 15:45:58,183 INFO L226 Difference]: Without dead ends: 6887 [2021-06-05 15:45:58,184 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 765.9ms TimeCoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:45:58,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6887 states. [2021-06-05 15:45:58,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6887 to 6286. [2021-06-05 15:45:58,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6286 states, 6285 states have (on average 3.6307080350039778) internal successors, (22819), 6285 states have internal predecessors, (22819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:58,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6286 states to 6286 states and 22819 transitions. [2021-06-05 15:45:58,316 INFO L78 Accepts]: Start accepts. Automaton has 6286 states and 22819 transitions. Word has length 30 [2021-06-05 15:45:58,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:45:58,316 INFO L482 AbstractCegarLoop]: Abstraction has 6286 states and 22819 transitions. [2021-06-05 15:45:58,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:58,316 INFO L276 IsEmpty]: Start isEmpty. Operand 6286 states and 22819 transitions. [2021-06-05 15:45:58,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:45:58,325 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:45:58,325 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:45:58,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-05 15:45:58,526 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:45:58,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:45:58,526 INFO L82 PathProgramCache]: Analyzing trace with hash 260501498, now seen corresponding path program 61 times [2021-06-05 15:45:58,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:45:58,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167449554] [2021-06-05 15:45:58,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:45:58,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:45:58,661 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:58,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:45:58,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167449554] [2021-06-05 15:45:58,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167449554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:58,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027216853] [2021-06-05 15:45:58,662 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 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 15:45:58,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:45:58,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:45:58,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:45:58,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 15:45:58,741 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:58,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:58,750 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:58,750 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 15:45:58,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:58,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-06-05 15:45:58,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:58,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:58,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:58,847 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:47 [2021-06-05 15:45:58,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:58,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 25 [2021-06-05 15:45:58,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:58,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:58,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:58,888 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:30 [2021-06-05 15:45:58,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:45:58,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:58,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:58,940 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:58,940 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 15:45:58,990 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:58,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027216853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:58,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:45:58,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:45:58,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357861287] [2021-06-05 15:45:58,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:45:58,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:45:58,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:45:58,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:45:58,992 INFO L87 Difference]: Start difference. First operand 6286 states and 22819 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:59,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:45:59,508 INFO L93 Difference]: Finished difference Result 6957 states and 24946 transitions. [2021-06-05 15:45:59,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 15:45:59,508 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:45:59,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:45:59,519 INFO L225 Difference]: With dead ends: 6957 [2021-06-05 15:45:59,520 INFO L226 Difference]: Without dead ends: 6942 [2021-06-05 15:45:59,520 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 344.0ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:45:59,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6942 states. [2021-06-05 15:45:59,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6942 to 6271. [2021-06-05 15:45:59,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6271 states, 6270 states have (on average 3.6299840510366828) internal successors, (22760), 6270 states have internal predecessors, (22760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:59,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6271 states to 6271 states and 22760 transitions. [2021-06-05 15:45:59,607 INFO L78 Accepts]: Start accepts. Automaton has 6271 states and 22760 transitions. Word has length 30 [2021-06-05 15:45:59,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:45:59,607 INFO L482 AbstractCegarLoop]: Abstraction has 6271 states and 22760 transitions. [2021-06-05 15:45:59,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:45:59,607 INFO L276 IsEmpty]: Start isEmpty. Operand 6271 states and 22760 transitions. [2021-06-05 15:45:59,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:45:59,616 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:45:59,616 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:45:59,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:45:59,817 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:45:59,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:45:59,817 INFO L82 PathProgramCache]: Analyzing trace with hash -814318776, now seen corresponding path program 62 times [2021-06-05 15:45:59,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:45:59,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570208940] [2021-06-05 15:45:59,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:45:59,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:45:59,933 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:59,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:45:59,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570208940] [2021-06-05 15:45:59,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570208940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:59,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617565553] [2021-06-05 15:45:59,933 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 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 15:45:59,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:45:59,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:45:59,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:45:59,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:45:59,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 15:45:59,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:59,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:59,998 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:45:59,998 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 15:46:00,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:46:00,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-06-05 15:46:00,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:00,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:00,081 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:00,081 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:52 [2021-06-05 15:46:00,156 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-06-05 15:46:00,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 158 treesize of output 98 [2021-06-05 15:46:00,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:00,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:00,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:00,166 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:158, output treesize:36 [2021-06-05 15:46:00,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:46:00,198 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:00,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:00,202 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:00,202 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 15:46:00,250 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:46:00,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617565553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:00,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:46:00,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:46:00,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838378879] [2021-06-05 15:46:00,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:46:00,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:46:00,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:46:00,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:46:00,251 INFO L87 Difference]: Start difference. First operand 6271 states and 22760 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:01,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:46:01,008 INFO L93 Difference]: Finished difference Result 6835 states and 24442 transitions. [2021-06-05 15:46:01,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:46:01,009 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:46:01,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:46:01,019 INFO L225 Difference]: With dead ends: 6835 [2021-06-05 15:46:01,019 INFO L226 Difference]: Without dead ends: 6798 [2021-06-05 15:46:01,020 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 381.9ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:46:01,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6798 states. [2021-06-05 15:46:01,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6798 to 6275. [2021-06-05 15:46:01,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6275 states, 6274 states have (on average 3.629901179470832) internal successors, (22774), 6274 states have internal predecessors, (22774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:01,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6275 states to 6275 states and 22774 transitions. [2021-06-05 15:46:01,102 INFO L78 Accepts]: Start accepts. Automaton has 6275 states and 22774 transitions. Word has length 30 [2021-06-05 15:46:01,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:46:01,102 INFO L482 AbstractCegarLoop]: Abstraction has 6275 states and 22774 transitions. [2021-06-05 15:46:01,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:01,102 INFO L276 IsEmpty]: Start isEmpty. Operand 6275 states and 22774 transitions. [2021-06-05 15:46:01,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:46:01,110 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:46:01,110 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:46:01,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:46:01,311 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:46:01,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:46:01,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1603347326, now seen corresponding path program 63 times [2021-06-05 15:46:01,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:46:01,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105896302] [2021-06-05 15:46:01,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:46:01,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:46:01,444 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:46:01,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:46:01,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105896302] [2021-06-05 15:46:01,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105896302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:01,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70740687] [2021-06-05 15:46:01,444 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 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 15:46:01,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:46:01,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:46:01,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:46:01,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:46:01,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 15:46:01,524 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:01,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:01,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:01,534 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 15:46:01,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:46:01,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 15:46:01,590 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:01,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:01,598 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:01,598 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:41 [2021-06-05 15:46:01,798 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:01,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 36 [2021-06-05 15:46:01,800 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:01,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:01,824 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:01,825 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:115 [2021-06-05 15:46:01,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:46:01,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:01,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 15:46:01,899 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:01,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 15:46:01,902 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:01,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:01,924 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 15:46:01,924 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:88, output treesize:52 [2021-06-05 15:46:02,050 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:46:02,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70740687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:02,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:46:02,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 23 [2021-06-05 15:46:02,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676661497] [2021-06-05 15:46:02,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:46:02,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:46:02,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:46:02,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:46:02,051 INFO L87 Difference]: Start difference. First operand 6275 states and 22774 transitions. Second operand has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:03,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:46:03,478 INFO L93 Difference]: Finished difference Result 6597 states and 23655 transitions. [2021-06-05 15:46:03,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:46:03,478 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:46:03,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:46:03,489 INFO L225 Difference]: With dead ends: 6597 [2021-06-05 15:46:03,489 INFO L226 Difference]: Without dead ends: 6553 [2021-06-05 15:46:03,489 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 896.6ms TimeCoverageRelationStatistics Valid=128, Invalid=1132, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:46:03,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6553 states. [2021-06-05 15:46:03,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6553 to 6269. [2021-06-05 15:46:03,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6269 states, 6268 states have (on average 3.629227823867262) internal successors, (22748), 6268 states have internal predecessors, (22748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:03,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6269 states to 6269 states and 22748 transitions. [2021-06-05 15:46:03,570 INFO L78 Accepts]: Start accepts. Automaton has 6269 states and 22748 transitions. Word has length 30 [2021-06-05 15:46:03,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:46:03,570 INFO L482 AbstractCegarLoop]: Abstraction has 6269 states and 22748 transitions. [2021-06-05 15:46:03,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:03,570 INFO L276 IsEmpty]: Start isEmpty. Operand 6269 states and 22748 transitions. [2021-06-05 15:46:03,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:46:03,579 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:46:03,579 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:46:03,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable187 [2021-06-05 15:46:03,780 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:46:03,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:46:03,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1832361604, now seen corresponding path program 64 times [2021-06-05 15:46:03,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:46:03,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517812062] [2021-06-05 15:46:03,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:46:03,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:46:03,925 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:46:03,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:46:03,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517812062] [2021-06-05 15:46:03,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517812062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:03,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283458890] [2021-06-05 15:46:03,926 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 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 15:46:03,950 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:46:03,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:46:03,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:46:03,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:46:03,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 15:46:03,984 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:03,992 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:03,992 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:03,992 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 15:46:04,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:46:04,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-06-05 15:46:04,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:04,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:04,085 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:04,085 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:54 [2021-06-05 15:46:04,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-06-05 15:46:04,188 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:04,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:04,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:04,195 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:25 [2021-06-05 15:46:04,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:46:04,226 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:04,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:04,230 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:04,230 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 15:46:04,261 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:46:04,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283458890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:04,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:46:04,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2021-06-05 15:46:04,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640671268] [2021-06-05 15:46:04,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:46:04,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:46:04,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:46:04,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:46:04,262 INFO L87 Difference]: Start difference. First operand 6269 states and 22748 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:04,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:46:04,730 INFO L93 Difference]: Finished difference Result 6385 states and 23050 transitions. [2021-06-05 15:46:04,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 15:46:04,730 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:46:04,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:46:04,741 INFO L225 Difference]: With dead ends: 6385 [2021-06-05 15:46:04,742 INFO L226 Difference]: Without dead ends: 6363 [2021-06-05 15:46:04,742 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 409.2ms TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:46:04,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6363 states. [2021-06-05 15:46:04,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6363 to 6233. [2021-06-05 15:46:04,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6233 states, 6232 states have (on average 3.6331835686777922) internal successors, (22642), 6232 states have internal predecessors, (22642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:04,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6233 states to 6233 states and 22642 transitions. [2021-06-05 15:46:04,827 INFO L78 Accepts]: Start accepts. Automaton has 6233 states and 22642 transitions. Word has length 30 [2021-06-05 15:46:04,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:46:04,827 INFO L482 AbstractCegarLoop]: Abstraction has 6233 states and 22642 transitions. [2021-06-05 15:46:04,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:04,827 INFO L276 IsEmpty]: Start isEmpty. Operand 6233 states and 22642 transitions. [2021-06-05 15:46:04,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:46:04,836 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:46:04,836 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:46:05,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:46:05,037 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:46:05,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:46:05,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1741867956, now seen corresponding path program 65 times [2021-06-05 15:46:05,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:46:05,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370685714] [2021-06-05 15:46:05,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:46:05,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:46:05,254 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:46:05,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:46:05,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370685714] [2021-06-05 15:46:05,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370685714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:05,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149892336] [2021-06-05 15:46:05,255 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 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 15:46:05,295 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:46:05,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:46:05,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:46:05,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:46:05,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 15:46:05,334 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:05,343 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:05,344 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:05,344 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 15:46:05,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:46:05,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 15:46:05,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:05,486 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:05,487 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:05,487 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:48 [2021-06-05 15:46:05,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:46:05,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:46:05,630 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:05,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 61 [2021-06-05 15:46:05,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:46:05,714 INFO L628 ElimStorePlain]: treesize reduction 81, result has 50.6 percent of original size [2021-06-05 15:46:05,741 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:05,741 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:65, output treesize:115 [2021-06-05 15:46:05,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:46:05,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:05,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:05,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:05,852 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 15:46:05,885 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:46:05,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149892336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:05,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:46:05,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 15:46:05,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133337970] [2021-06-05 15:46:05,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:46:05,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:46:05,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:46:05,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:46:05,886 INFO L87 Difference]: Start difference. First operand 6233 states and 22642 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:06,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:46:06,868 INFO L93 Difference]: Finished difference Result 6975 states and 24902 transitions. [2021-06-05 15:46:06,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:46:06,868 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:46:06,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:46:06,879 INFO L225 Difference]: With dead ends: 6975 [2021-06-05 15:46:06,879 INFO L226 Difference]: Without dead ends: 6924 [2021-06-05 15:46:06,880 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 737.9ms TimeCoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:46:06,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6924 states. [2021-06-05 15:46:06,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6924 to 6343. [2021-06-05 15:46:06,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6343 states, 6342 states have (on average 3.6255124566382846) internal successors, (22993), 6342 states have internal predecessors, (22993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:06,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6343 states to 6343 states and 22993 transitions. [2021-06-05 15:46:06,965 INFO L78 Accepts]: Start accepts. Automaton has 6343 states and 22993 transitions. Word has length 30 [2021-06-05 15:46:06,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:46:06,965 INFO L482 AbstractCegarLoop]: Abstraction has 6343 states and 22993 transitions. [2021-06-05 15:46:06,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:06,965 INFO L276 IsEmpty]: Start isEmpty. Operand 6343 states and 22993 transitions. [2021-06-05 15:46:06,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:46:06,974 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:46:06,974 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:46:07,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:46:07,174 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:46:07,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:46:07,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1349896180, now seen corresponding path program 66 times [2021-06-05 15:46:07,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:46:07,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20419116] [2021-06-05 15:46:07,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:46:07,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:46:07,305 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:46:07,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:46:07,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20419116] [2021-06-05 15:46:07,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20419116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:07,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179835680] [2021-06-05 15:46:07,306 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 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 15:46:07,331 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:46:07,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:46:07,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:46:07,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:46:07,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 15:46:07,350 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:07,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:07,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:07,358 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 15:46:07,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:46:07,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:46:07,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-06-05 15:46:07,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:07,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:07,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:07,406 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:73, output treesize:50 [2021-06-05 15:46:07,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 15:46:07,492 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:07,499 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:07,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:07,500 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-06-05 15:46:07,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 15:46:07,528 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:07,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:07,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:07,534 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:17 [2021-06-05 15:46:07,588 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:46:07,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179835680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:07,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:46:07,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 15:46:07,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957241140] [2021-06-05 15:46:07,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:46:07,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:46:07,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:46:07,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:46:07,589 INFO L87 Difference]: Start difference. First operand 6343 states and 22993 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:08,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:46:08,379 INFO L93 Difference]: Finished difference Result 7674 states and 27186 transitions. [2021-06-05 15:46:08,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:46:08,379 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:46:08,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:46:08,391 INFO L225 Difference]: With dead ends: 7674 [2021-06-05 15:46:08,391 INFO L226 Difference]: Without dead ends: 7631 [2021-06-05 15:46:08,392 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 476.0ms TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:46:08,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7631 states. [2021-06-05 15:46:08,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7631 to 6367. [2021-06-05 15:46:08,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6367 states, 6366 states have (on average 3.622525918944392) internal successors, (23061), 6366 states have internal predecessors, (23061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:08,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 23061 transitions. [2021-06-05 15:46:08,509 INFO L78 Accepts]: Start accepts. Automaton has 6367 states and 23061 transitions. Word has length 30 [2021-06-05 15:46:08,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:46:08,509 INFO L482 AbstractCegarLoop]: Abstraction has 6367 states and 23061 transitions. [2021-06-05 15:46:08,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:08,509 INFO L276 IsEmpty]: Start isEmpty. Operand 6367 states and 23061 transitions. [2021-06-05 15:46:08,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:46:08,518 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:46:08,518 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:46:08,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-06-05 15:46:08,719 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:46:08,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:46:08,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1760502544, now seen corresponding path program 67 times [2021-06-05 15:46:08,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:46:08,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954860468] [2021-06-05 15:46:08,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:46:08,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:46:08,865 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:46:08,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:46:08,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954860468] [2021-06-05 15:46:08,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954860468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:08,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746030999] [2021-06-05 15:46:08,865 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 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 15:46:08,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:46:08,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:46:08,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:46:08,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 15:46:08,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:08,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:08,916 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:08,916 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 15:46:08,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:46:08,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:46:08,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-06-05 15:46:08,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:08,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:08,986 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:08,986 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:72, output treesize:57 [2021-06-05 15:46:09,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:46:09,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 34 [2021-06-05 15:46:09,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:09,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:09,056 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:09,056 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:63, output treesize:42 [2021-06-05 15:46:09,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-06-05 15:46:09,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:09,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:09,087 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:09,087 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:17 [2021-06-05 15:46:09,137 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:46:09,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746030999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:09,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:46:09,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 15:46:09,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558383673] [2021-06-05 15:46:09,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:46:09,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:46:09,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:46:09,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:46:09,138 INFO L87 Difference]: Start difference. First operand 6367 states and 23061 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:09,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:46:09,721 INFO L93 Difference]: Finished difference Result 7344 states and 26138 transitions. [2021-06-05 15:46:09,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:46:09,721 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:46:09,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:46:09,733 INFO L225 Difference]: With dead ends: 7344 [2021-06-05 15:46:09,733 INFO L226 Difference]: Without dead ends: 7270 [2021-06-05 15:46:09,733 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 385.5ms TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:46:09,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7270 states. [2021-06-05 15:46:09,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7270 to 6327. [2021-06-05 15:46:09,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6327 states, 6326 states have (on average 3.6296237748972495) internal successors, (22961), 6326 states have internal predecessors, (22961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:09,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6327 states to 6327 states and 22961 transitions. [2021-06-05 15:46:09,820 INFO L78 Accepts]: Start accepts. Automaton has 6327 states and 22961 transitions. Word has length 30 [2021-06-05 15:46:09,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:46:09,820 INFO L482 AbstractCegarLoop]: Abstraction has 6327 states and 22961 transitions. [2021-06-05 15:46:09,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:09,820 INFO L276 IsEmpty]: Start isEmpty. Operand 6327 states and 22961 transitions. [2021-06-05 15:46:09,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:46:09,828 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:46:09,828 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:46:10,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-06-05 15:46:10,031 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:46:10,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:46:10,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1753454196, now seen corresponding path program 68 times [2021-06-05 15:46:10,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:46:10,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975878317] [2021-06-05 15:46:10,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:46:10,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:46:10,180 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:46:10,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:46:10,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975878317] [2021-06-05 15:46:10,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975878317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:10,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545648406] [2021-06-05 15:46:10,180 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 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 15:46:10,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:46:10,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:46:10,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:46:10,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:46:10,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 15:46:10,236 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:10,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:10,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:10,245 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 15:46:10,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:46:10,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:46:10,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-06-05 15:46:10,327 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:10,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:10,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:10,345 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:83, output treesize:60 [2021-06-05 15:46:10,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:46:10,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 30 [2021-06-05 15:46:10,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:10,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:10,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:10,406 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:60, output treesize:45 [2021-06-05 15:46:10,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-06-05 15:46:10,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:10,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:10,475 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:10,475 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:17 [2021-06-05 15:46:10,526 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:46:10,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545648406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:10,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:46:10,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 15:46:10,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732279906] [2021-06-05 15:46:10,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:46:10,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:46:10,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:46:10,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:46:10,527 INFO L87 Difference]: Start difference. First operand 6327 states and 22961 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:11,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:46:11,050 INFO L93 Difference]: Finished difference Result 7803 states and 27440 transitions. [2021-06-05 15:46:11,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:46:11,051 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:46:11,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:46:11,064 INFO L225 Difference]: With dead ends: 7803 [2021-06-05 15:46:11,065 INFO L226 Difference]: Without dead ends: 7700 [2021-06-05 15:46:11,065 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 411.4ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:46:11,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7700 states. [2021-06-05 15:46:11,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7700 to 6339. [2021-06-05 15:46:11,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6339 states, 6338 states have (on average 3.6345850426001896) internal successors, (23036), 6338 states have internal predecessors, (23036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:11,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6339 states to 6339 states and 23036 transitions. [2021-06-05 15:46:11,155 INFO L78 Accepts]: Start accepts. Automaton has 6339 states and 23036 transitions. Word has length 30 [2021-06-05 15:46:11,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:46:11,155 INFO L482 AbstractCegarLoop]: Abstraction has 6339 states and 23036 transitions. [2021-06-05 15:46:11,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:11,155 INFO L276 IsEmpty]: Start isEmpty. Operand 6339 states and 23036 transitions. [2021-06-05 15:46:11,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:46:11,163 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:46:11,164 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:46:11,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable207 [2021-06-05 15:46:11,364 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:46:11,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:46:11,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1666844150, now seen corresponding path program 69 times [2021-06-05 15:46:11,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:46:11,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100901148] [2021-06-05 15:46:11,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:46:11,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:46:11,492 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:46:11,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:46:11,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100901148] [2021-06-05 15:46:11,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100901148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:11,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579675357] [2021-06-05 15:46:11,493 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 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 15:46:11,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:46:11,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:46:11,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:46:11,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:46:11,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 15:46:11,557 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:11,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:11,564 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:11,564 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:22 [2021-06-05 15:46:11,618 INFO L354 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2021-06-05 15:46:11,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 15:46:11,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:11,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:11,630 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:11,630 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:43 [2021-06-05 15:46:11,741 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-06-05 15:46:11,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 41 [2021-06-05 15:46:11,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:11,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:11,805 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:11,805 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:123 [2021-06-05 15:46:12,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:46:12,014 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:12,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2021-06-05 15:46:12,015 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:46:12,023 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:12,024 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:12,024 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:27 [2021-06-05 15:46:12,127 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:46:12,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579675357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:12,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:46:12,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 23 [2021-06-05 15:46:12,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618763117] [2021-06-05 15:46:12,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:46:12,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:46:12,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:46:12,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=500, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:46:12,128 INFO L87 Difference]: Start difference. First operand 6339 states and 23036 transitions. Second operand has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:13,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:46:13,478 INFO L93 Difference]: Finished difference Result 6740 states and 24150 transitions. [2021-06-05 15:46:13,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:46:13,479 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:46:13,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:46:13,489 INFO L225 Difference]: With dead ends: 6740 [2021-06-05 15:46:13,489 INFO L226 Difference]: Without dead ends: 6647 [2021-06-05 15:46:13,490 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1051.6ms TimeCoverageRelationStatistics Valid=132, Invalid=1274, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:46:13,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6647 states. [2021-06-05 15:46:13,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6647 to 6393. [2021-06-05 15:46:13,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6393 states, 6392 states have (on average 3.6307884856070087) internal successors, (23208), 6392 states have internal predecessors, (23208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:13,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6393 states to 6393 states and 23208 transitions. [2021-06-05 15:46:13,570 INFO L78 Accepts]: Start accepts. Automaton has 6393 states and 23208 transitions. Word has length 30 [2021-06-05 15:46:13,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:46:13,571 INFO L482 AbstractCegarLoop]: Abstraction has 6393 states and 23208 transitions. [2021-06-05 15:46:13,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:13,571 INFO L276 IsEmpty]: Start isEmpty. Operand 6393 states and 23208 transitions. [2021-06-05 15:46:13,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:46:13,579 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:46:13,579 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:46:13,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:46:13,780 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:46:13,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:46:13,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1213143856, now seen corresponding path program 70 times [2021-06-05 15:46:13,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:46:13,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050519082] [2021-06-05 15:46:13,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:46:13,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:46:13,903 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:46:13,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:46:13,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050519082] [2021-06-05 15:46:13,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050519082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:13,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480377907] [2021-06-05 15:46:13,904 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 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 15:46:13,928 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:46:13,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:46:13,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:46:13,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:46:13,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 15:46:13,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:13,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:13,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:13,969 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 15:46:14,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:46:14,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 15:46:14,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:14,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:14,031 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:14,032 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:40 [2021-06-05 15:46:14,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:46:14,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2021-06-05 15:46:14,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:14,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:14,098 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:14,098 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:30 [2021-06-05 15:46:14,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:46:14,178 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:14,182 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:14,183 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:14,183 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 15:46:14,213 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:46:14,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480377907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:14,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:46:14,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:46:14,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579760414] [2021-06-05 15:46:14,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:46:14,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:46:14,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:46:14,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:46:14,214 INFO L87 Difference]: Start difference. First operand 6393 states and 23208 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:14,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:46:14,633 INFO L93 Difference]: Finished difference Result 6914 states and 24810 transitions. [2021-06-05 15:46:14,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 15:46:14,633 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:46:14,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:46:14,644 INFO L225 Difference]: With dead ends: 6914 [2021-06-05 15:46:14,644 INFO L226 Difference]: Without dead ends: 6875 [2021-06-05 15:46:14,644 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 303.1ms TimeCoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:46:14,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6875 states. [2021-06-05 15:46:14,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6875 to 6435. [2021-06-05 15:46:14,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6435 states, 6434 states have (on average 3.630711843332297) internal successors, (23360), 6434 states have internal predecessors, (23360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:14,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6435 states to 6435 states and 23360 transitions. [2021-06-05 15:46:14,726 INFO L78 Accepts]: Start accepts. Automaton has 6435 states and 23360 transitions. Word has length 30 [2021-06-05 15:46:14,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:46:14,726 INFO L482 AbstractCegarLoop]: Abstraction has 6435 states and 23360 transitions. [2021-06-05 15:46:14,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:14,726 INFO L276 IsEmpty]: Start isEmpty. Operand 6435 states and 23360 transitions. [2021-06-05 15:46:14,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:46:14,735 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:46:14,735 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:46:14,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-05 15:46:14,935 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:46:14,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:46:14,936 INFO L82 PathProgramCache]: Analyzing trace with hash -821172080, now seen corresponding path program 71 times [2021-06-05 15:46:14,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:46:14,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359930953] [2021-06-05 15:46:14,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:46:14,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:46:15,090 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:46:15,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:46:15,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359930953] [2021-06-05 15:46:15,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359930953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:15,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795523391] [2021-06-05 15:46:15,091 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 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 15:46:15,159 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:46:15,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:46:15,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:46:15,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:46:15,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 15:46:15,190 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:15,198 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:15,198 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:15,198 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 15:46:15,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:46:15,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 15:46:15,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:15,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:15,286 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 1 xjuncts. [2021-06-05 15:46:15,286 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:43 [2021-06-05 15:46:15,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:46:15,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:46:15,420 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:15,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 59 [2021-06-05 15:46:15,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:46:15,490 INFO L628 ElimStorePlain]: treesize reduction 84, result has 51.2 percent of original size [2021-06-05 15:46:15,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 15:46:15,502 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:60, output treesize:40 [2021-06-05 15:46:15,709 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_2], 5=[A]} [2021-06-05 15:46:15,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 15:46:15,712 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:15,736 INFO L628 ElimStorePlain]: treesize reduction 3, result has 93.2 percent of original size [2021-06-05 15:46:15,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:46:15,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:46:15,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:46:15,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:46:15,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 12 [2021-06-05 15:46:15,741 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:15,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:15,751 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 15:46:15,751 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:53, output treesize:20 [2021-06-05 15:46:15,818 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:46:15,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795523391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:15,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:46:15,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 21 [2021-06-05 15:46:15,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445375097] [2021-06-05 15:46:15,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:46:15,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:46:15,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:46:15,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:46:15,819 INFO L87 Difference]: Start difference. First operand 6435 states and 23360 transitions. Second operand has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:16,537 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-06-05 15:46:18,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:46:18,342 INFO L93 Difference]: Finished difference Result 7742 states and 27559 transitions. [2021-06-05 15:46:18,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:46:18,342 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:46:18,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:46:18,355 INFO L225 Difference]: With dead ends: 7742 [2021-06-05 15:46:18,355 INFO L226 Difference]: Without dead ends: 7703 [2021-06-05 15:46:18,355 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1444.6ms TimeCoverageRelationStatistics Valid=153, Invalid=1253, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:46:18,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7703 states. [2021-06-05 15:46:18,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7703 to 6439. [2021-06-05 15:46:18,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6439 states, 6438 states have (on average 3.630009319664492) internal successors, (23370), 6438 states have internal predecessors, (23370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:18,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6439 states to 6439 states and 23370 transitions. [2021-06-05 15:46:18,448 INFO L78 Accepts]: Start accepts. Automaton has 6439 states and 23370 transitions. Word has length 30 [2021-06-05 15:46:18,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:46:18,448 INFO L482 AbstractCegarLoop]: Abstraction has 6439 states and 23370 transitions. [2021-06-05 15:46:18,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:18,448 INFO L276 IsEmpty]: Start isEmpty. Operand 6439 states and 23370 transitions. [2021-06-05 15:46:18,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:46:18,458 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:46:18,458 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:46:18,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:46:18,661 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:46:18,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:46:18,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1882522150, now seen corresponding path program 72 times [2021-06-05 15:46:18,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:46:18,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645265458] [2021-06-05 15:46:18,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:46:18,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:46:18,903 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:46:18,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:46:18,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645265458] [2021-06-05 15:46:18,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645265458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:18,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142254072] [2021-06-05 15:46:18,903 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 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 15:46:18,969 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:46:18,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:46:18,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:46:18,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:46:19,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 15:46:19,035 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:19,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:19,044 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:19,044 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 15:46:19,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:46:19,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 15:46:19,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:19,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:19,099 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:19,100 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:35 [2021-06-05 15:46:19,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2021-06-05 15:46:19,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:19,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:19,252 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:19,252 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:22 [2021-06-05 15:46:19,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:46:19,291 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:19,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:19,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:19,297 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 15:46:19,363 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:46:19,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142254072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:19,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:46:19,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:46:19,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514630967] [2021-06-05 15:46:19,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:46:19,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:46:19,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:46:19,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:46:19,365 INFO L87 Difference]: Start difference. First operand 6439 states and 23370 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:20,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:46:20,423 INFO L93 Difference]: Finished difference Result 7171 states and 25755 transitions. [2021-06-05 15:46:20,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 15:46:20,424 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:46:20,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:46:20,438 INFO L225 Difference]: With dead ends: 7171 [2021-06-05 15:46:20,438 INFO L226 Difference]: Without dead ends: 7113 [2021-06-05 15:46:20,438 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 633.3ms TimeCoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:46:20,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7113 states. [2021-06-05 15:46:20,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7113 to 6451. [2021-06-05 15:46:20,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6451 states, 6450 states have (on average 3.6308527131782946) internal successors, (23419), 6450 states have internal predecessors, (23419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:20,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6451 states to 6451 states and 23419 transitions. [2021-06-05 15:46:20,553 INFO L78 Accepts]: Start accepts. Automaton has 6451 states and 23419 transitions. Word has length 30 [2021-06-05 15:46:20,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:46:20,554 INFO L482 AbstractCegarLoop]: Abstraction has 6451 states and 23419 transitions. [2021-06-05 15:46:20,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:20,554 INFO L276 IsEmpty]: Start isEmpty. Operand 6451 states and 23419 transitions. [2021-06-05 15:46:20,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:46:20,565 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:46:20,565 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:46:20,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2021-06-05 15:46:20,786 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:46:20,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:46:20,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1619848350, now seen corresponding path program 73 times [2021-06-05 15:46:20,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:46:20,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19187740] [2021-06-05 15:46:20,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:46:20,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:46:21,031 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:46:21,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:46:21,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19187740] [2021-06-05 15:46:21,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19187740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:21,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60979279] [2021-06-05 15:46:21,032 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 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 15:46:21,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:46:21,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:46:21,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:46:21,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 15:46:21,109 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:21,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:21,119 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:21,119 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 15:46:21,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:46:21,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 15:46:21,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:21,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:21,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:21,192 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:40 [2021-06-05 15:46:21,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:46:21,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-06-05 15:46:21,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:21,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:21,318 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:21,318 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:32 [2021-06-05 15:46:21,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:46:21,351 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:21,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:21,357 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:21,357 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:12 [2021-06-05 15:46:21,422 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:46:21,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60979279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:21,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:46:21,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:46:21,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899503977] [2021-06-05 15:46:21,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:46:21,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:46:21,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:46:21,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:46:21,423 INFO L87 Difference]: Start difference. First operand 6451 states and 23419 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:22,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:46:22,180 INFO L93 Difference]: Finished difference Result 7289 states and 26137 transitions. [2021-06-05 15:46:22,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 15:46:22,181 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:46:22,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:46:22,193 INFO L225 Difference]: With dead ends: 7289 [2021-06-05 15:46:22,194 INFO L226 Difference]: Without dead ends: 7256 [2021-06-05 15:46:22,194 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 501.2ms TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:46:22,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7256 states. [2021-06-05 15:46:22,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7256 to 6431. [2021-06-05 15:46:22,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6431 states, 6430 states have (on average 3.636702954898911) internal successors, (23384), 6430 states have internal predecessors, (23384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:22,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6431 states to 6431 states and 23384 transitions. [2021-06-05 15:46:22,282 INFO L78 Accepts]: Start accepts. Automaton has 6431 states and 23384 transitions. Word has length 30 [2021-06-05 15:46:22,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:46:22,282 INFO L482 AbstractCegarLoop]: Abstraction has 6431 states and 23384 transitions. [2021-06-05 15:46:22,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:22,282 INFO L276 IsEmpty]: Start isEmpty. Operand 6431 states and 23384 transitions. [2021-06-05 15:46:22,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:46:22,291 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:46:22,291 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:46:22,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:46:22,491 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:46:22,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:46:22,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1131466028, now seen corresponding path program 74 times [2021-06-05 15:46:22,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:46:22,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589048422] [2021-06-05 15:46:22,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:46:22,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:46:22,698 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:46:22,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:46:22,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589048422] [2021-06-05 15:46:22,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589048422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:22,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383601404] [2021-06-05 15:46:22,699 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 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 15:46:22,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:46:22,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:46:22,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:46:22,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:46:22,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 15:46:22,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:22,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:22,764 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:22,764 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 15:46:22,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:46:22,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:46:22,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-06-05 15:46:22,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:22,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:22,830 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:22,830 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:77, output treesize:54 [2021-06-05 15:46:22,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 15:46:22,952 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:22,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:22,962 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:22,962 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-06-05 15:46:23,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 15:46:23,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:23,015 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:23,015 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:23,016 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:17 [2021-06-05 15:46:23,082 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:46:23,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383601404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:23,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:46:23,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 15:46:23,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475078742] [2021-06-05 15:46:23,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:46:23,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:46:23,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:46:23,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:46:23,083 INFO L87 Difference]: Start difference. First operand 6431 states and 23384 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:24,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:46:24,285 INFO L93 Difference]: Finished difference Result 7361 states and 26202 transitions. [2021-06-05 15:46:24,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:46:24,286 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:46:24,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:46:24,300 INFO L225 Difference]: With dead ends: 7361 [2021-06-05 15:46:24,300 INFO L226 Difference]: Without dead ends: 7274 [2021-06-05 15:46:24,300 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 514.0ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:46:24,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7274 states. [2021-06-05 15:46:24,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7274 to 6635. [2021-06-05 15:46:24,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6635 states, 6634 states have (on average 3.6323485076876696) internal successors, (24097), 6634 states have internal predecessors, (24097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:24,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6635 states to 6635 states and 24097 transitions. [2021-06-05 15:46:24,417 INFO L78 Accepts]: Start accepts. Automaton has 6635 states and 24097 transitions. Word has length 30 [2021-06-05 15:46:24,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:46:24,421 INFO L482 AbstractCegarLoop]: Abstraction has 6635 states and 24097 transitions. [2021-06-05 15:46:24,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:24,422 INFO L276 IsEmpty]: Start isEmpty. Operand 6635 states and 24097 transitions. [2021-06-05 15:46:24,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:46:24,433 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:46:24,433 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:46:24,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:46:24,654 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:46:24,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:46:24,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1924062824, now seen corresponding path program 75 times [2021-06-05 15:46:24,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:46:24,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626226264] [2021-06-05 15:46:24,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:46:24,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:46:24,810 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:46:24,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:46:24,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626226264] [2021-06-05 15:46:24,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626226264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:24,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161436329] [2021-06-05 15:46:24,825 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 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 15:46:24,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:46:24,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:46:24,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:46:24,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:46:24,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 15:46:24,927 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:24,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:24,937 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:24,937 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 15:46:25,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:46:25,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:46:25,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-06-05 15:46:25,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:25,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:25,030 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:25,030 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:72, output treesize:49 [2021-06-05 15:46:25,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:46:25,266 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:25,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 52 [2021-06-05 15:46:25,277 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:46:25,352 INFO L628 ElimStorePlain]: treesize reduction 15, result has 88.5 percent of original size [2021-06-05 15:46:25,361 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:25,362 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:161 [2021-06-05 15:46:25,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-06-05 15:46:25,466 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:25,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-06-05 15:46:25,471 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:25,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 15:46:25,476 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:25,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 15:46:25,481 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:25,539 INFO L628 ElimStorePlain]: treesize reduction 3, result has 95.2 percent of original size [2021-06-05 15:46:25,540 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 15:46:25,540 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:133, output treesize:60 [2021-06-05 15:46:25,709 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:46:25,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161436329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:25,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:46:25,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-06-05 15:46:25,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962680198] [2021-06-05 15:46:25,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:46:25,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:46:25,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:46:25,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:46:25,710 INFO L87 Difference]: Start difference. First operand 6635 states and 24097 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:27,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:46:27,120 INFO L93 Difference]: Finished difference Result 8103 states and 28705 transitions. [2021-06-05 15:46:27,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:46:27,120 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:46:27,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:46:27,133 INFO L225 Difference]: With dead ends: 8103 [2021-06-05 15:46:27,133 INFO L226 Difference]: Without dead ends: 7951 [2021-06-05 15:46:27,133 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1131.2ms TimeCoverageRelationStatistics Valid=120, Invalid=810, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:46:27,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7951 states. [2021-06-05 15:46:27,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7951 to 6705. [2021-06-05 15:46:27,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6705 states, 6704 states have (on average 3.6302207637231505) internal successors, (24337), 6704 states have internal predecessors, (24337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:27,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6705 states to 6705 states and 24337 transitions. [2021-06-05 15:46:27,228 INFO L78 Accepts]: Start accepts. Automaton has 6705 states and 24337 transitions. Word has length 30 [2021-06-05 15:46:27,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:46:27,228 INFO L482 AbstractCegarLoop]: Abstraction has 6705 states and 24337 transitions. [2021-06-05 15:46:27,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:27,228 INFO L276 IsEmpty]: Start isEmpty. Operand 6705 states and 24337 transitions. [2021-06-05 15:46:27,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:46:27,238 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:46:27,238 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:46:27,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:46:27,438 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:46:27,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:46:27,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1286200074, now seen corresponding path program 76 times [2021-06-05 15:46:27,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:46:27,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415680861] [2021-06-05 15:46:27,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:46:27,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:46:27,585 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:46:27,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:46:27,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415680861] [2021-06-05 15:46:27,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415680861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:27,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564221193] [2021-06-05 15:46:27,585 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 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 15:46:27,610 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:46:27,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:46:27,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:46:27,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:46:27,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 15:46:27,634 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:27,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:27,642 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:27,642 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 15:46:27,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:46:27,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:46:27,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-06-05 15:46:27,680 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:27,693 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:27,693 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:27,693 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:77, output treesize:54 [2021-06-05 15:46:27,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:46:27,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 31 [2021-06-05 15:46:27,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:27,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:27,849 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:27,849 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:69, output treesize:47 [2021-06-05 15:46:27,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 15:46:27,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:27,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:27,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:27,886 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:17 [2021-06-05 15:46:27,921 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:46:27,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564221193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:27,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:46:27,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 15:46:27,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608553107] [2021-06-05 15:46:27,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:46:27,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:46:27,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:46:27,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:46:27,922 INFO L87 Difference]: Start difference. First operand 6705 states and 24337 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:28,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:46:28,654 INFO L93 Difference]: Finished difference Result 6847 states and 24689 transitions. [2021-06-05 15:46:28,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 15:46:28,655 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:46:28,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:46:28,666 INFO L225 Difference]: With dead ends: 6847 [2021-06-05 15:46:28,666 INFO L226 Difference]: Without dead ends: 6832 [2021-06-05 15:46:28,667 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 518.4ms TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:46:28,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6832 states. [2021-06-05 15:46:28,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6832 to 6705. [2021-06-05 15:46:28,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6705 states, 6704 states have (on average 3.6302207637231505) internal successors, (24337), 6704 states have internal predecessors, (24337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:28,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6705 states to 6705 states and 24337 transitions. [2021-06-05 15:46:28,760 INFO L78 Accepts]: Start accepts. Automaton has 6705 states and 24337 transitions. Word has length 30 [2021-06-05 15:46:28,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:46:28,760 INFO L482 AbstractCegarLoop]: Abstraction has 6705 states and 24337 transitions. [2021-06-05 15:46:28,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:28,760 INFO L276 IsEmpty]: Start isEmpty. Operand 6705 states and 24337 transitions. [2021-06-05 15:46:28,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:46:28,769 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:46:28,769 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:46:28,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-06-05 15:46:28,970 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:46:28,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:46:28,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1143052268, now seen corresponding path program 77 times [2021-06-05 15:46:28,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:46:28,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624530923] [2021-06-05 15:46:28,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:46:28,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:46:29,096 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:46:29,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:46:29,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624530923] [2021-06-05 15:46:29,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624530923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:29,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318588583] [2021-06-05 15:46:29,097 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 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 15:46:29,128 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:46:29,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:46:29,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:46:29,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:46:29,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 15:46:29,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:29,155 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:29,155 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:29,155 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 15:46:29,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:46:29,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:46:29,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-06-05 15:46:29,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:29,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:29,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:29,223 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:77, output treesize:54 [2021-06-05 15:46:29,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:46:29,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 30 [2021-06-05 15:46:29,287 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:29,299 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:29,300 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:29,300 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:60, output treesize:45 [2021-06-05 15:46:29,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-06-05 15:46:29,399 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:29,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:29,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:29,406 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:17 [2021-06-05 15:46:29,475 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:46:29,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318588583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:29,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:46:29,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 15:46:29,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979620245] [2021-06-05 15:46:29,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:46:29,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:46:29,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:46:29,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:46:29,476 INFO L87 Difference]: Start difference. First operand 6705 states and 24337 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:30,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:46:30,052 INFO L93 Difference]: Finished difference Result 7749 states and 27582 transitions. [2021-06-05 15:46:30,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:46:30,052 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:46:30,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:46:30,064 INFO L225 Difference]: With dead ends: 7749 [2021-06-05 15:46:30,064 INFO L226 Difference]: Without dead ends: 7683 [2021-06-05 15:46:30,064 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 390.1ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:46:30,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7683 states. [2021-06-05 15:46:30,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7683 to 6717. [2021-06-05 15:46:30,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6717 states, 6716 states have (on average 3.631923764145325) internal successors, (24392), 6716 states have internal predecessors, (24392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:30,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6717 states to 6717 states and 24392 transitions. [2021-06-05 15:46:30,155 INFO L78 Accepts]: Start accepts. Automaton has 6717 states and 24392 transitions. Word has length 30 [2021-06-05 15:46:30,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:46:30,155 INFO L482 AbstractCegarLoop]: Abstraction has 6717 states and 24392 transitions. [2021-06-05 15:46:30,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:30,155 INFO L276 IsEmpty]: Start isEmpty. Operand 6717 states and 24392 transitions. [2021-06-05 15:46:30,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:46:30,164 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:46:30,164 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:46:30,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:46:30,365 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:46:30,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:46:30,365 INFO L82 PathProgramCache]: Analyzing trace with hash -593298096, now seen corresponding path program 78 times [2021-06-05 15:46:30,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:46:30,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068918228] [2021-06-05 15:46:30,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:46:30,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:46:30,489 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:46:30,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:46:30,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068918228] [2021-06-05 15:46:30,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068918228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:30,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511500635] [2021-06-05 15:46:30,490 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 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 15:46:30,515 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:46:30,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:46:30,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:46:30,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:46:30,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 15:46:30,534 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:30,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:30,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:30,542 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 15:46:30,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:46:30,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:46:30,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-06-05 15:46:30,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:30,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:30,592 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:30,592 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:72, output treesize:49 [2021-06-05 15:46:30,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:46:30,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 31 [2021-06-05 15:46:30,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:30,699 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:30,699 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:30,699 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:69, output treesize:47 [2021-06-05 15:46:30,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 15:46:30,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:30,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:30,736 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:30,736 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:17 [2021-06-05 15:46:30,792 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:46:30,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511500635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:30,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:46:30,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 15:46:30,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233777147] [2021-06-05 15:46:30,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:46:30,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:46:30,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:46:30,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:46:30,793 INFO L87 Difference]: Start difference. First operand 6717 states and 24392 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:31,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:46:31,727 INFO L93 Difference]: Finished difference Result 7532 states and 26962 transitions. [2021-06-05 15:46:31,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:46:31,727 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:46:31,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:46:31,738 INFO L225 Difference]: With dead ends: 7532 [2021-06-05 15:46:31,739 INFO L226 Difference]: Without dead ends: 7487 [2021-06-05 15:46:31,739 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 493.3ms TimeCoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:46:31,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7487 states. [2021-06-05 15:46:31,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7487 to 6569. [2021-06-05 15:46:31,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6569 states, 6568 states have (on average 3.6385505481120584) internal successors, (23898), 6568 states have internal predecessors, (23898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:31,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6569 states to 6569 states and 23898 transitions. [2021-06-05 15:46:31,825 INFO L78 Accepts]: Start accepts. Automaton has 6569 states and 23898 transitions. Word has length 30 [2021-06-05 15:46:31,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:46:31,825 INFO L482 AbstractCegarLoop]: Abstraction has 6569 states and 23898 transitions. [2021-06-05 15:46:31,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:31,825 INFO L276 IsEmpty]: Start isEmpty. Operand 6569 states and 23898 transitions. [2021-06-05 15:46:31,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:46:31,834 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:46:31,834 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:46:32,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:46:32,035 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:46:32,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:46:32,035 INFO L82 PathProgramCache]: Analyzing trace with hash 395652262, now seen corresponding path program 79 times [2021-06-05 15:46:32,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:46:32,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878394441] [2021-06-05 15:46:32,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:46:32,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:46:32,062 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:46:32,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:46:32,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878394441] [2021-06-05 15:46:32,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878394441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:32,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802690797] [2021-06-05 15:46:32,062 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 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 15:46:32,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:46:32,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 15:46:32,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:46:32,131 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:46:32,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802690797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:32,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:46:32,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 15:46:32,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813679523] [2021-06-05 15:46:32,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 15:46:32,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:46:32,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 15:46:32,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:46:32,132 INFO L87 Difference]: Start difference. First operand 6569 states and 23898 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 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 15:46:32,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:46:32,293 INFO L93 Difference]: Finished difference Result 11102 states and 39754 transitions. [2021-06-05 15:46:32,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 15:46:32,293 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 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 32 [2021-06-05 15:46:32,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:46:32,311 INFO L225 Difference]: With dead ends: 11102 [2021-06-05 15:46:32,312 INFO L226 Difference]: Without dead ends: 11102 [2021-06-05 15:46:32,312 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 59.4ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:46:32,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11102 states. [2021-06-05 15:46:32,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11102 to 6724. [2021-06-05 15:46:32,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6724 states, 6723 states have (on average 3.66517923546036) internal successors, (24641), 6723 states have internal predecessors, (24641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:32,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6724 states to 6724 states and 24641 transitions. [2021-06-05 15:46:32,427 INFO L78 Accepts]: Start accepts. Automaton has 6724 states and 24641 transitions. Word has length 32 [2021-06-05 15:46:32,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:46:32,427 INFO L482 AbstractCegarLoop]: Abstraction has 6724 states and 24641 transitions. [2021-06-05 15:46:32,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 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 15:46:32,427 INFO L276 IsEmpty]: Start isEmpty. Operand 6724 states and 24641 transitions. [2021-06-05 15:46:32,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:46:32,436 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:46:32,436 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:46:32,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:46:32,636 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:46:32,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:46:32,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1898467678, now seen corresponding path program 80 times [2021-06-05 15:46:32,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:46:32,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948930171] [2021-06-05 15:46:32,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:46:32,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:46:32,657 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 15:46:32,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:46:32,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948930171] [2021-06-05 15:46:32,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948930171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:32,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397527134] [2021-06-05 15:46:32,657 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 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 15:46:32,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:46:32,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:46:32,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 15:46:32,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:46:32,752 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:46:32,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397527134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:32,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:46:32,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-06-05 15:46:32,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747557472] [2021-06-05 15:46:32,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:46:32,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:46:32,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:46:32,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:46:32,752 INFO L87 Difference]: Start difference. First operand 6724 states and 24641 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:33,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:46:33,436 INFO L93 Difference]: Finished difference Result 16532 states and 58007 transitions. [2021-06-05 15:46:33,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 15:46:33,436 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:46:33,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:46:33,467 INFO L225 Difference]: With dead ends: 16532 [2021-06-05 15:46:33,467 INFO L226 Difference]: Without dead ends: 16408 [2021-06-05 15:46:33,467 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 393.3ms TimeCoverageRelationStatistics Valid=580, Invalid=1582, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:46:33,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16408 states. [2021-06-05 15:46:33,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16408 to 8510. [2021-06-05 15:46:33,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8510 states, 8509 states have (on average 3.6823363497473265) internal successors, (31333), 8509 states have internal predecessors, (31333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:33,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8510 states to 8510 states and 31333 transitions. [2021-06-05 15:46:33,634 INFO L78 Accepts]: Start accepts. Automaton has 8510 states and 31333 transitions. Word has length 32 [2021-06-05 15:46:33,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:46:33,634 INFO L482 AbstractCegarLoop]: Abstraction has 8510 states and 31333 transitions. [2021-06-05 15:46:33,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:33,634 INFO L276 IsEmpty]: Start isEmpty. Operand 8510 states and 31333 transitions. [2021-06-05 15:46:33,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:46:33,646 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:46:33,646 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:46:33,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:46:33,846 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:46:33,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:46:33,847 INFO L82 PathProgramCache]: Analyzing trace with hash 2057537456, now seen corresponding path program 81 times [2021-06-05 15:46:33,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:46:33,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945039328] [2021-06-05 15:46:33,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:46:33,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:46:33,868 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:46:33,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:46:33,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945039328] [2021-06-05 15:46:33,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945039328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:33,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818611819] [2021-06-05 15:46:33,868 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 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 15:46:33,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 15:46:33,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:46:33,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 15:46:33,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:46:33,954 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:46:33,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818611819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:33,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:46:33,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 15:46:33,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806845311] [2021-06-05 15:46:33,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 15:46:33,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:46:33,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 15:46:33,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:46:33,955 INFO L87 Difference]: Start difference. First operand 8510 states and 31333 transitions. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:34,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:46:34,893 INFO L93 Difference]: Finished difference Result 20781 states and 72355 transitions. [2021-06-05 15:46:34,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 15:46:34,893 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:46:34,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:46:34,931 INFO L225 Difference]: With dead ends: 20781 [2021-06-05 15:46:34,931 INFO L226 Difference]: Without dead ends: 20533 [2021-06-05 15:46:34,932 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1340 ImplicationChecksByTransitivity, 444.6ms TimeCoverageRelationStatistics Valid=767, Invalid=2893, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 15:46:34,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20533 states. [2021-06-05 15:46:35,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20533 to 11322. [2021-06-05 15:46:35,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11322 states, 11321 states have (on average 3.7398639696139915) internal successors, (42339), 11321 states have internal predecessors, (42339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:35,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11322 states to 11322 states and 42339 transitions. [2021-06-05 15:46:35,163 INFO L78 Accepts]: Start accepts. Automaton has 11322 states and 42339 transitions. Word has length 32 [2021-06-05 15:46:35,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:46:35,163 INFO L482 AbstractCegarLoop]: Abstraction has 11322 states and 42339 transitions. [2021-06-05 15:46:35,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:35,163 INFO L276 IsEmpty]: Start isEmpty. Operand 11322 states and 42339 transitions. [2021-06-05 15:46:35,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:46:35,178 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:46:35,179 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:46:35,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-06-05 15:46:35,379 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:46:35,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:46:35,379 INFO L82 PathProgramCache]: Analyzing trace with hash 64495996, now seen corresponding path program 82 times [2021-06-05 15:46:35,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:46:35,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280963362] [2021-06-05 15:46:35,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:46:35,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:46:35,405 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:46:35,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:46:35,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280963362] [2021-06-05 15:46:35,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280963362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:35,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424528204] [2021-06-05 15:46:35,407 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 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 15:46:35,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:46:35,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:46:35,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 15:46:35,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:46:35,516 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:46:35,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424528204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:35,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:46:35,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-06-05 15:46:35,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582371440] [2021-06-05 15:46:35,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 15:46:35,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:46:35,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 15:46:35,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:46:35,517 INFO L87 Difference]: Start difference. First operand 11322 states and 42339 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:36,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:46:36,479 INFO L93 Difference]: Finished difference Result 34302 states and 118976 transitions. [2021-06-05 15:46:36,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 15:46:36,479 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:46:36,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:46:36,549 INFO L225 Difference]: With dead ends: 34302 [2021-06-05 15:46:36,549 INFO L226 Difference]: Without dead ends: 34031 [2021-06-05 15:46:36,550 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1471 ImplicationChecksByTransitivity, 555.2ms TimeCoverageRelationStatistics Valid=1052, Invalid=3108, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 15:46:36,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34031 states. [2021-06-05 15:46:36,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34031 to 18468. [2021-06-05 15:46:36,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18468 states, 18467 states have (on average 3.7362321979747657) internal successors, (68997), 18467 states have internal predecessors, (68997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:37,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18468 states to 18468 states and 68997 transitions. [2021-06-05 15:46:37,031 INFO L78 Accepts]: Start accepts. Automaton has 18468 states and 68997 transitions. Word has length 32 [2021-06-05 15:46:37,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:46:37,031 INFO L482 AbstractCegarLoop]: Abstraction has 18468 states and 68997 transitions. [2021-06-05 15:46:37,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:37,031 INFO L276 IsEmpty]: Start isEmpty. Operand 18468 states and 68997 transitions. [2021-06-05 15:46:37,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:46:37,056 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:46:37,056 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:46:37,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-06-05 15:46:37,256 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:46:37,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:46:37,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1359569624, now seen corresponding path program 83 times [2021-06-05 15:46:37,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:46:37,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401699110] [2021-06-05 15:46:37,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:46:37,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:46:37,290 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:46:37,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:46:37,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401699110] [2021-06-05 15:46:37,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401699110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:37,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057297980] [2021-06-05 15:46:37,290 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 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 15:46:37,361 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 15:46:37,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:46:37,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 15:46:37,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:46:37,417 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:46:37,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057297980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:37,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:46:37,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 10 [2021-06-05 15:46:37,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921994218] [2021-06-05 15:46:37,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 15:46:37,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:46:37,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 15:46:37,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:46:37,418 INFO L87 Difference]: Start difference. First operand 18468 states and 68997 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 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 15:46:38,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:46:38,053 INFO L93 Difference]: Finished difference Result 46514 states and 167385 transitions. [2021-06-05 15:46:38,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:46:38,053 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 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 32 [2021-06-05 15:46:38,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:46:38,156 INFO L225 Difference]: With dead ends: 46514 [2021-06-05 15:46:38,156 INFO L226 Difference]: Without dead ends: 46280 [2021-06-05 15:46:38,156 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 242.3ms TimeCoverageRelationStatistics Valid=353, Invalid=1053, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:46:38,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46280 states. [2021-06-05 15:46:38,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46280 to 35803. [2021-06-05 15:46:38,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35803 states, 35802 states have (on average 3.786240992123345) internal successors, (135555), 35802 states have internal predecessors, (135555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:39,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35803 states to 35803 states and 135555 transitions. [2021-06-05 15:46:39,002 INFO L78 Accepts]: Start accepts. Automaton has 35803 states and 135555 transitions. Word has length 32 [2021-06-05 15:46:39,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:46:39,003 INFO L482 AbstractCegarLoop]: Abstraction has 35803 states and 135555 transitions. [2021-06-05 15:46:39,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 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 15:46:39,003 INFO L276 IsEmpty]: Start isEmpty. Operand 35803 states and 135555 transitions. [2021-06-05 15:46:39,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:46:39,045 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:46:39,045 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:46:39,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-06-05 15:46:39,246 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:46:39,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:46:39,246 INFO L82 PathProgramCache]: Analyzing trace with hash 644380696, now seen corresponding path program 84 times [2021-06-05 15:46:39,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:46:39,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305556281] [2021-06-05 15:46:39,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:46:39,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:46:39,272 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:46:39,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:46:39,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305556281] [2021-06-05 15:46:39,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305556281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:39,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260338286] [2021-06-05 15:46:39,273 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 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 15:46:39,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:46:39,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:46:39,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 15:46:39,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:46:39,361 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:46:39,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260338286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:39,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:46:39,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 15:46:39,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430909034] [2021-06-05 15:46:39,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 15:46:39,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:46:39,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 15:46:39,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:46:39,362 INFO L87 Difference]: Start difference. First operand 35803 states and 135555 transitions. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:40,707 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-06-05 15:46:41,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:46:41,138 INFO L93 Difference]: Finished difference Result 88369 states and 318216 transitions. [2021-06-05 15:46:41,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 15:46:41,139 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:46:41,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:46:41,529 INFO L225 Difference]: With dead ends: 88369 [2021-06-05 15:46:41,529 INFO L226 Difference]: Without dead ends: 88320 [2021-06-05 15:46:41,530 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2147 ImplicationChecksByTransitivity, 1012.7ms TimeCoverageRelationStatistics Valid=1091, Invalid=4609, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 15:46:41,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88320 states. [2021-06-05 15:46:42,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88320 to 62379. [2021-06-05 15:46:42,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62379 states, 62378 states have (on average 3.8003462759306164) internal successors, (237058), 62378 states have internal predecessors, (237058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:43,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62379 states to 62379 states and 237058 transitions. [2021-06-05 15:46:43,429 INFO L78 Accepts]: Start accepts. Automaton has 62379 states and 237058 transitions. Word has length 32 [2021-06-05 15:46:43,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:46:43,429 INFO L482 AbstractCegarLoop]: Abstraction has 62379 states and 237058 transitions. [2021-06-05 15:46:43,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:43,429 INFO L276 IsEmpty]: Start isEmpty. Operand 62379 states and 237058 transitions. [2021-06-05 15:46:43,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:46:43,498 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:46:43,498 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:46:43,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-06-05 15:46:43,699 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:46:43,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:46:43,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1512147096, now seen corresponding path program 85 times [2021-06-05 15:46:43,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:46:43,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454517500] [2021-06-05 15:46:43,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:46:43,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:46:43,884 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2021-06-05 15:46:43,902 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:46:43,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:46:43,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454517500] [2021-06-05 15:46:43,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454517500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:43,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374421540] [2021-06-05 15:46:43,902 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 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 15:46:43,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:46:43,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 15:46:43,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:46:43,985 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:46:43,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374421540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:43,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:46:43,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 15:46:43,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664669763] [2021-06-05 15:46:43,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:46:43,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:46:43,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:46:43,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:46:43,986 INFO L87 Difference]: Start difference. First operand 62379 states and 237058 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:45,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:46:45,261 INFO L93 Difference]: Finished difference Result 108485 states and 398658 transitions. [2021-06-05 15:46:45,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 15:46:45,262 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:46:45,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:46:45,602 INFO L225 Difference]: With dead ends: 108485 [2021-06-05 15:46:45,602 INFO L226 Difference]: Without dead ends: 108345 [2021-06-05 15:46:45,602 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 315.7ms TimeCoverageRelationStatistics Valid=455, Invalid=1437, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:46:45,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108345 states. [2021-06-05 15:46:47,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108345 to 66321. [2021-06-05 15:46:47,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66321 states, 66320 states have (on average 3.801809408926417) internal successors, (252136), 66320 states have internal predecessors, (252136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:47,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66321 states to 66321 states and 252136 transitions. [2021-06-05 15:46:47,563 INFO L78 Accepts]: Start accepts. Automaton has 66321 states and 252136 transitions. Word has length 32 [2021-06-05 15:46:47,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:46:47,563 INFO L482 AbstractCegarLoop]: Abstraction has 66321 states and 252136 transitions. [2021-06-05 15:46:47,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:47,563 INFO L276 IsEmpty]: Start isEmpty. Operand 66321 states and 252136 transitions. [2021-06-05 15:46:47,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:46:47,620 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:46:47,621 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:46:47,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable247 [2021-06-05 15:46:47,821 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:46:47,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:46:47,821 INFO L82 PathProgramCache]: Analyzing trace with hash -488341172, now seen corresponding path program 86 times [2021-06-05 15:46:47,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:46:47,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200457412] [2021-06-05 15:46:47,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:46:47,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:46:47,849 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:46:47,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:46:47,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200457412] [2021-06-05 15:46:47,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200457412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:47,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065201692] [2021-06-05 15:46:47,850 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 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 15:46:47,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:46:47,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:46:47,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 15:46:47,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:46:48,163 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:46:48,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065201692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:48,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:46:48,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 12 [2021-06-05 15:46:48,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690711142] [2021-06-05 15:46:48,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:46:48,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:46:48,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:46:48,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:46:48,164 INFO L87 Difference]: Start difference. First operand 66321 states and 252136 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:49,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:46:49,913 INFO L93 Difference]: Finished difference Result 119338 states and 429533 transitions. [2021-06-05 15:46:49,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 15:46:49,914 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:46:49,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:46:50,280 INFO L225 Difference]: With dead ends: 119338 [2021-06-05 15:46:50,280 INFO L226 Difference]: Without dead ends: 119149 [2021-06-05 15:46:50,281 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1943 ImplicationChecksByTransitivity, 691.6ms TimeCoverageRelationStatistics Valid=1390, Invalid=4160, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 15:46:50,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119149 states. [2021-06-05 15:46:51,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119149 to 57377. [2021-06-05 15:46:52,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57377 states, 57376 states have (on average 3.772936419408812) internal successors, (216476), 57376 states have internal predecessors, (216476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:52,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57377 states to 57377 states and 216476 transitions. [2021-06-05 15:46:52,494 INFO L78 Accepts]: Start accepts. Automaton has 57377 states and 216476 transitions. Word has length 32 [2021-06-05 15:46:52,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:46:52,494 INFO L482 AbstractCegarLoop]: Abstraction has 57377 states and 216476 transitions. [2021-06-05 15:46:52,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:52,494 INFO L276 IsEmpty]: Start isEmpty. Operand 57377 states and 216476 transitions. [2021-06-05 15:46:52,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:46:52,550 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:46:52,550 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:46:52,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:46:52,750 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:46:52,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:46:52,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1222826244, now seen corresponding path program 87 times [2021-06-05 15:46:52,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:46:52,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024380110] [2021-06-05 15:46:52,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:46:52,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:46:52,787 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:46:52,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:46:52,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024380110] [2021-06-05 15:46:52,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024380110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:52,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064314933] [2021-06-05 15:46:52,787 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 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 15:46:52,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:46:52,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:46:52,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:46:52,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:46:52,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 15:46:52,866 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:52,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:52,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:46:52,875 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:35 [2021-06-05 15:46:52,962 INFO L446 ElimStorePlain]: Different costs {3=[v_C_149], 5=[A]} [2021-06-05 15:46:52,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:46:52,983 INFO L354 Elim1Store]: treesize reduction 25, result has 26.5 percent of original size [2021-06-05 15:46:52,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 38 [2021-06-05 15:46:52,984 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:53,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:53,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:46:53,030 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:53,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 58 [2021-06-05 15:46:53,037 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 15:46:53,097 INFO L628 ElimStorePlain]: treesize reduction 90, result has 33.3 percent of original size [2021-06-05 15:46:53,104 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 1 xjuncts. [2021-06-05 15:46:53,104 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:55, output treesize:45 [2021-06-05 15:46:53,292 INFO L446 ElimStorePlain]: Different costs {1=[C], 6=[v_prenex_3]} [2021-06-05 15:46:53,300 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:53,300 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 14 [2021-06-05 15:46:53,301 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:46:53,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:53,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:46:53,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:46:53,359 INFO L354 Elim1Store]: treesize reduction 17, result has 54.1 percent of original size [2021-06-05 15:46:53,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 32 [2021-06-05 15:46:53,362 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 15:46:53,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:53,410 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 15:46:53,410 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:86, output treesize:151 [2021-06-05 15:46:53,680 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:46:53,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064314933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:53,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:46:53,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14] total 21 [2021-06-05 15:46:53,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233990186] [2021-06-05 15:46:53,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:46:53,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:46:53,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:46:53,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:46:53,681 INFO L87 Difference]: Start difference. First operand 57377 states and 216476 transitions. Second operand has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:46:54,381 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 17 [2021-06-05 15:46:56,801 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2021-06-05 15:46:57,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:46:57,795 INFO L93 Difference]: Finished difference Result 124474 states and 464024 transitions. [2021-06-05 15:46:57,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 15:46:57,796 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:46:57,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:46:58,182 INFO L225 Difference]: With dead ends: 124474 [2021-06-05 15:46:58,182 INFO L226 Difference]: Without dead ends: 124408 [2021-06-05 15:46:58,182 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1047 ImplicationChecksByTransitivity, 2543.6ms TimeCoverageRelationStatistics Valid=664, Invalid=3368, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 15:46:58,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124408 states. [2021-06-05 15:47:00,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124408 to 98412. [2021-06-05 15:47:00,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98412 states, 98411 states have (on average 3.8090152523600005) internal successors, (374849), 98411 states have internal predecessors, (374849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:01,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98412 states to 98412 states and 374849 transitions. [2021-06-05 15:47:01,013 INFO L78 Accepts]: Start accepts. Automaton has 98412 states and 374849 transitions. Word has length 32 [2021-06-05 15:47:01,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:47:01,013 INFO L482 AbstractCegarLoop]: Abstraction has 98412 states and 374849 transitions. [2021-06-05 15:47:01,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:01,013 INFO L276 IsEmpty]: Start isEmpty. Operand 98412 states and 374849 transitions. [2021-06-05 15:47:01,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:47:01,559 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:47:01,559 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:47:01,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:47:01,759 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:47:01,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:47:01,760 INFO L82 PathProgramCache]: Analyzing trace with hash 2035987310, now seen corresponding path program 88 times [2021-06-05 15:47:01,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:47:01,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529763454] [2021-06-05 15:47:01,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:47:01,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:47:01,795 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:47:01,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:47:01,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529763454] [2021-06-05 15:47:01,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529763454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:47:01,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114352371] [2021-06-05 15:47:01,795 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 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 15:47:01,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:47:01,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:47:01,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 15:47:01,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:47:01,864 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:47:01,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114352371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:47:01,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:47:01,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 15:47:01,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947620075] [2021-06-05 15:47:01,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 15:47:01,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:47:01,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 15:47:01,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:47:01,865 INFO L87 Difference]: Start difference. First operand 98412 states and 374849 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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 15:47:02,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:47:02,688 INFO L93 Difference]: Finished difference Result 123934 states and 465312 transitions. [2021-06-05 15:47:02,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 15:47:02,689 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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 32 [2021-06-05 15:47:02,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:47:03,066 INFO L225 Difference]: With dead ends: 123934 [2021-06-05 15:47:03,066 INFO L226 Difference]: Without dead ends: 123902 [2021-06-05 15:47:03,066 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 66.6ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:47:03,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123902 states. [2021-06-05 15:47:05,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123902 to 86419. [2021-06-05 15:47:05,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86419 states, 86418 states have (on average 3.807968247355875) internal successors, (329077), 86418 states have internal predecessors, (329077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:06,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86419 states to 86419 states and 329077 transitions. [2021-06-05 15:47:06,097 INFO L78 Accepts]: Start accepts. Automaton has 86419 states and 329077 transitions. Word has length 32 [2021-06-05 15:47:06,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:47:06,097 INFO L482 AbstractCegarLoop]: Abstraction has 86419 states and 329077 transitions. [2021-06-05 15:47:06,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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 15:47:06,097 INFO L276 IsEmpty]: Start isEmpty. Operand 86419 states and 329077 transitions. [2021-06-05 15:47:06,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:47:06,169 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:47:06,169 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:47:06,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:47:06,373 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:47:06,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:47:06,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1575283700, now seen corresponding path program 89 times [2021-06-05 15:47:06,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:47:06,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591893922] [2021-06-05 15:47:06,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:47:06,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:47:06,416 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:47:06,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:47:06,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591893922] [2021-06-05 15:47:06,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591893922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:47:06,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019183537] [2021-06-05 15:47:06,416 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 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 15:47:06,467 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:47:06,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:47:06,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 15:47:06,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:47:06,530 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:47:06,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019183537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:47:06,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:47:06,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 9 [2021-06-05 15:47:06,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971724640] [2021-06-05 15:47:06,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:47:06,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:47:06,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:47:06,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:47:06,532 INFO L87 Difference]: Start difference. First operand 86419 states and 329077 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 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 15:47:07,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:47:07,862 INFO L93 Difference]: Finished difference Result 100765 states and 379519 transitions. [2021-06-05 15:47:07,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:47:07,863 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 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 32 [2021-06-05 15:47:07,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:47:08,246 INFO L225 Difference]: With dead ends: 100765 [2021-06-05 15:47:08,246 INFO L226 Difference]: Without dead ends: 100765 [2021-06-05 15:47:08,246 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 178.0ms TimeCoverageRelationStatistics Valid=205, Invalid=497, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:47:08,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100765 states. [2021-06-05 15:47:10,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100765 to 87208. [2021-06-05 15:47:10,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87208 states, 87207 states have (on average 3.801311821298749) internal successors, (331501), 87207 states have internal predecessors, (331501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:10,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87208 states to 87208 states and 331501 transitions. [2021-06-05 15:47:10,749 INFO L78 Accepts]: Start accepts. Automaton has 87208 states and 331501 transitions. Word has length 32 [2021-06-05 15:47:10,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:47:10,749 INFO L482 AbstractCegarLoop]: Abstraction has 87208 states and 331501 transitions. [2021-06-05 15:47:10,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 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 15:47:10,749 INFO L276 IsEmpty]: Start isEmpty. Operand 87208 states and 331501 transitions. [2021-06-05 15:47:10,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:47:10,818 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:47:10,818 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:47:11,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable274 [2021-06-05 15:47:11,018 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:47:11,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:47:11,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1114060564, now seen corresponding path program 90 times [2021-06-05 15:47:11,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:47:11,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141415737] [2021-06-05 15:47:11,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:47:11,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:47:11,045 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:47:11,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:47:11,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141415737] [2021-06-05 15:47:11,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141415737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:47:11,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899824502] [2021-06-05 15:47:11,045 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 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 15:47:11,071 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:47:11,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:47:11,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 15:47:11,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:47:11,140 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:47:11,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899824502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:47:11,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:47:11,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-06-05 15:47:11,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18587007] [2021-06-05 15:47:11,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:47:11,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:47:11,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:47:11,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:47:11,141 INFO L87 Difference]: Start difference. First operand 87208 states and 331501 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:13,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:47:13,112 INFO L93 Difference]: Finished difference Result 145992 states and 544191 transitions. [2021-06-05 15:47:13,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 15:47:13,113 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:47:13,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:47:13,559 INFO L225 Difference]: With dead ends: 145992 [2021-06-05 15:47:13,559 INFO L226 Difference]: Without dead ends: 145292 [2021-06-05 15:47:13,560 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1522 ImplicationChecksByTransitivity, 519.3ms TimeCoverageRelationStatistics Valid=849, Invalid=3441, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 15:47:13,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145292 states. [2021-06-05 15:47:16,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145292 to 94868. [2021-06-05 15:47:16,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94868 states, 94867 states have (on average 3.8163323389587527) internal successors, (362044), 94867 states have internal predecessors, (362044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:16,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94868 states to 94868 states and 362044 transitions. [2021-06-05 15:47:16,959 INFO L78 Accepts]: Start accepts. Automaton has 94868 states and 362044 transitions. Word has length 32 [2021-06-05 15:47:16,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:47:16,959 INFO L482 AbstractCegarLoop]: Abstraction has 94868 states and 362044 transitions. [2021-06-05 15:47:16,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:16,959 INFO L276 IsEmpty]: Start isEmpty. Operand 94868 states and 362044 transitions. [2021-06-05 15:47:17,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:47:17,092 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:47:17,092 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:47:17,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:47:17,315 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:47:17,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:47:17,315 INFO L82 PathProgramCache]: Analyzing trace with hash 310314462, now seen corresponding path program 91 times [2021-06-05 15:47:17,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:47:17,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808449492] [2021-06-05 15:47:17,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:47:17,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:47:17,344 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:47:17,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:47:17,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808449492] [2021-06-05 15:47:17,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808449492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:47:17,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859727577] [2021-06-05 15:47:17,345 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 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 15:47:17,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:47:17,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 15:47:17,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:47:17,418 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:47:17,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859727577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:47:17,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:47:17,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 15:47:17,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880213391] [2021-06-05 15:47:17,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 15:47:17,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:47:17,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 15:47:17,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:47:17,419 INFO L87 Difference]: Start difference. First operand 94868 states and 362044 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 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 15:47:18,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:47:18,259 INFO L93 Difference]: Finished difference Result 147209 states and 562251 transitions. [2021-06-05 15:47:18,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 15:47:18,260 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 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 33 [2021-06-05 15:47:18,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:47:19,321 INFO L225 Difference]: With dead ends: 147209 [2021-06-05 15:47:19,321 INFO L226 Difference]: Without dead ends: 145919 [2021-06-05 15:47:19,321 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 53.0ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:47:19,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145919 states. [2021-06-05 15:47:22,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145919 to 142860. [2021-06-05 15:47:22,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142860 states, 142859 states have (on average 3.757474152836013) internal successors, (536789), 142859 states have internal predecessors, (536789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:23,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142860 states to 142860 states and 536789 transitions. [2021-06-05 15:47:23,414 INFO L78 Accepts]: Start accepts. Automaton has 142860 states and 536789 transitions. Word has length 33 [2021-06-05 15:47:23,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:47:23,414 INFO L482 AbstractCegarLoop]: Abstraction has 142860 states and 536789 transitions. [2021-06-05 15:47:23,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 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 15:47:23,414 INFO L276 IsEmpty]: Start isEmpty. Operand 142860 states and 536789 transitions. [2021-06-05 15:47:23,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:47:23,608 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:47:23,608 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:47:23,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2021-06-05 15:47:23,809 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:47:23,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:47:23,809 INFO L82 PathProgramCache]: Analyzing trace with hash 388582514, now seen corresponding path program 92 times [2021-06-05 15:47:23,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:47:23,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371525185] [2021-06-05 15:47:23,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:47:23,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:47:23,829 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:47:23,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:47:23,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371525185] [2021-06-05 15:47:23,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371525185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:47:23,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311560696] [2021-06-05 15:47:23,829 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 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 15:47:23,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:47:23,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:47:23,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 15:47:23,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:47:23,895 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:47:23,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311560696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:47:23,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:47:23,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 15:47:23,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993181551] [2021-06-05 15:47:23,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 15:47:23,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:47:23,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 15:47:23,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:47:23,896 INFO L87 Difference]: Start difference. First operand 142860 states and 536789 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 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 15:47:24,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:47:24,645 INFO L93 Difference]: Finished difference Result 146910 states and 548418 transitions. [2021-06-05 15:47:24,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 15:47:24,646 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 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 33 [2021-06-05 15:47:24,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:47:25,836 INFO L225 Difference]: With dead ends: 146910 [2021-06-05 15:47:25,837 INFO L226 Difference]: Without dead ends: 146830 [2021-06-05 15:47:25,837 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 33.8ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:47:25,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146830 states. [2021-06-05 15:47:28,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146830 to 122252. [2021-06-05 15:47:28,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122252 states, 122251 states have (on average 3.763003983607496) internal successors, (460031), 122251 states have internal predecessors, (460031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:29,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122252 states to 122252 states and 460031 transitions. [2021-06-05 15:47:29,058 INFO L78 Accepts]: Start accepts. Automaton has 122252 states and 460031 transitions. Word has length 33 [2021-06-05 15:47:29,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:47:29,058 INFO L482 AbstractCegarLoop]: Abstraction has 122252 states and 460031 transitions. [2021-06-05 15:47:29,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 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 15:47:29,059 INFO L276 IsEmpty]: Start isEmpty. Operand 122252 states and 460031 transitions. [2021-06-05 15:47:29,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:47:29,175 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:47:29,175 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:47:29,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-06-05 15:47:29,375 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:47:29,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:47:29,376 INFO L82 PathProgramCache]: Analyzing trace with hash 58068616, now seen corresponding path program 93 times [2021-06-05 15:47:29,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:47:29,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311780805] [2021-06-05 15:47:29,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:47:29,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:47:29,403 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:47:29,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:47:29,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311780805] [2021-06-05 15:47:29,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311780805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:47:29,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875224926] [2021-06-05 15:47:29,403 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 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 15:47:29,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:47:29,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:47:29,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 15:47:29,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:47:29,495 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:47:29,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875224926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:47:29,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:47:29,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 10 [2021-06-05 15:47:29,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347421901] [2021-06-05 15:47:29,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 15:47:29,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:47:29,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 15:47:29,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:47:29,496 INFO L87 Difference]: Start difference. First operand 122252 states and 460031 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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 15:47:31,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:47:31,216 INFO L93 Difference]: Finished difference Result 165358 states and 606680 transitions. [2021-06-05 15:47:31,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:47:31,216 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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 33 [2021-06-05 15:47:31,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:47:31,682 INFO L225 Difference]: With dead ends: 165358 [2021-06-05 15:47:31,682 INFO L226 Difference]: Without dead ends: 164920 [2021-06-05 15:47:31,682 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 228.8ms TimeCoverageRelationStatistics Valid=262, Invalid=730, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:47:31,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164920 states. [2021-06-05 15:47:35,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164920 to 137687. [2021-06-05 15:47:35,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137687 states, 137686 states have (on average 3.7301831704022197) internal successors, (513594), 137686 states have internal predecessors, (513594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:35,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137687 states to 137687 states and 513594 transitions. [2021-06-05 15:47:35,849 INFO L78 Accepts]: Start accepts. Automaton has 137687 states and 513594 transitions. Word has length 33 [2021-06-05 15:47:35,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:47:35,849 INFO L482 AbstractCegarLoop]: Abstraction has 137687 states and 513594 transitions. [2021-06-05 15:47:35,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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 15:47:35,849 INFO L276 IsEmpty]: Start isEmpty. Operand 137687 states and 513594 transitions. [2021-06-05 15:47:35,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:47:35,977 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:47:35,977 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:47:36,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-06-05 15:47:36,178 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:47:36,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:47:36,178 INFO L82 PathProgramCache]: Analyzing trace with hash -125858070, now seen corresponding path program 94 times [2021-06-05 15:47:36,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:47:36,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482373771] [2021-06-05 15:47:36,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:47:36,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:47:36,197 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:47:36,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:47:36,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482373771] [2021-06-05 15:47:36,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482373771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:47:36,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341113299] [2021-06-05 15:47:36,197 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 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 15:47:36,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:47:36,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:47:36,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 15:47:36,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:47:36,260 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 16 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:47:36,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341113299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:47:36,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:47:36,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 15:47:36,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535910429] [2021-06-05 15:47:36,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 15:47:36,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:47:36,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 15:47:36,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:47:36,261 INFO L87 Difference]: Start difference. First operand 137687 states and 513594 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 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 15:47:37,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:47:37,692 INFO L93 Difference]: Finished difference Result 140839 states and 522801 transitions. [2021-06-05 15:47:37,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 15:47:37,692 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 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 33 [2021-06-05 15:47:37,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:47:38,105 INFO L225 Difference]: With dead ends: 140839 [2021-06-05 15:47:38,105 INFO L226 Difference]: Without dead ends: 140726 [2021-06-05 15:47:38,106 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 26.8ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:47:38,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140726 states. [2021-06-05 15:47:41,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140726 to 130600. [2021-06-05 15:47:41,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130600 states, 130599 states have (on average 3.7374099342261426) internal successors, (488102), 130599 states have internal predecessors, (488102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:42,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130600 states to 130600 states and 488102 transitions. [2021-06-05 15:47:42,193 INFO L78 Accepts]: Start accepts. Automaton has 130600 states and 488102 transitions. Word has length 33 [2021-06-05 15:47:42,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:47:42,193 INFO L482 AbstractCegarLoop]: Abstraction has 130600 states and 488102 transitions. [2021-06-05 15:47:42,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 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 15:47:42,193 INFO L276 IsEmpty]: Start isEmpty. Operand 130600 states and 488102 transitions. [2021-06-05 15:47:42,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:47:42,337 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:47:42,337 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:47:42,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-06-05 15:47:42,538 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:47:42,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:47:42,539 INFO L82 PathProgramCache]: Analyzing trace with hash 966384908, now seen corresponding path program 95 times [2021-06-05 15:47:42,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:47:42,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021028207] [2021-06-05 15:47:42,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:47:42,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:47:42,565 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:47:42,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:47:42,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021028207] [2021-06-05 15:47:42,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021028207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:47:42,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681245453] [2021-06-05 15:47:42,565 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 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 15:47:42,592 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:47:42,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:47:42,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 15:47:42,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:47:42,653 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 15:47:42,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681245453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:47:42,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:47:42,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-06-05 15:47:42,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685256399] [2021-06-05 15:47:42,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:47:42,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:47:42,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:47:42,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:47:42,654 INFO L87 Difference]: Start difference. First operand 130600 states and 488102 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:44,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:47:44,405 INFO L93 Difference]: Finished difference Result 119213 states and 438130 transitions. [2021-06-05 15:47:44,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 15:47:44,406 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:47:44,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:47:44,819 INFO L225 Difference]: With dead ends: 119213 [2021-06-05 15:47:44,819 INFO L226 Difference]: Without dead ends: 117375 [2021-06-05 15:47:44,819 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 427.7ms TimeCoverageRelationStatistics Valid=710, Invalid=2596, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 15:47:44,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117375 states. [2021-06-05 15:47:47,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117375 to 107160. [2021-06-05 15:47:47,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107160 states, 107159 states have (on average 3.7435399733106878) internal successors, (401154), 107159 states have internal predecessors, (401154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:47,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107160 states to 107160 states and 401154 transitions. [2021-06-05 15:47:47,830 INFO L78 Accepts]: Start accepts. Automaton has 107160 states and 401154 transitions. Word has length 33 [2021-06-05 15:47:47,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:47:47,830 INFO L482 AbstractCegarLoop]: Abstraction has 107160 states and 401154 transitions. [2021-06-05 15:47:47,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:47,830 INFO L276 IsEmpty]: Start isEmpty. Operand 107160 states and 401154 transitions. [2021-06-05 15:47:47,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:47:47,940 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:47:47,940 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:47:48,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:47:48,140 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:47:48,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:47:48,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1919330936, now seen corresponding path program 96 times [2021-06-05 15:47:48,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:47:48,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196084688] [2021-06-05 15:47:48,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:47:48,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:47:48,169 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:47:48,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:47:48,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196084688] [2021-06-05 15:47:48,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196084688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:47:48,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582978520] [2021-06-05 15:47:48,169 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 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 15:47:48,194 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:47:48,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:47:48,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 15:47:48,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:47:48,267 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:47:48,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582978520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:47:48,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:47:48,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-06-05 15:47:48,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140383003] [2021-06-05 15:47:48,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:47:48,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:47:48,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:47:48,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:47:48,268 INFO L87 Difference]: Start difference. First operand 107160 states and 401154 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:50,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:47:50,041 INFO L93 Difference]: Finished difference Result 117944 states and 436638 transitions. [2021-06-05 15:47:50,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:47:50,041 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:47:50,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:47:50,703 INFO L225 Difference]: With dead ends: 117944 [2021-06-05 15:47:50,703 INFO L226 Difference]: Without dead ends: 117764 [2021-06-05 15:47:50,703 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 248.2ms TimeCoverageRelationStatistics Valid=271, Invalid=851, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:47:50,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117764 states. [2021-06-05 15:47:52,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117764 to 113313. [2021-06-05 15:47:52,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113313 states, 113312 states have (on average 3.7259072295961593) internal successors, (422190), 113312 states have internal predecessors, (422190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:53,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113313 states to 113313 states and 422190 transitions. [2021-06-05 15:47:53,765 INFO L78 Accepts]: Start accepts. Automaton has 113313 states and 422190 transitions. Word has length 33 [2021-06-05 15:47:53,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:47:53,765 INFO L482 AbstractCegarLoop]: Abstraction has 113313 states and 422190 transitions. [2021-06-05 15:47:53,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:53,765 INFO L276 IsEmpty]: Start isEmpty. Operand 113313 states and 422190 transitions. [2021-06-05 15:47:53,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:47:53,888 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:47:53,888 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:47:54,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:47:54,089 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:47:54,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:47:54,090 INFO L82 PathProgramCache]: Analyzing trace with hash -45752080, now seen corresponding path program 97 times [2021-06-05 15:47:54,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:47:54,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288547894] [2021-06-05 15:47:54,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:47:54,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:47:54,111 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:47:54,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:47:54,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288547894] [2021-06-05 15:47:54,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288547894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:47:54,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220079858] [2021-06-05 15:47:54,112 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 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 15:47:54,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:47:54,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 15:47:54,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:47:54,188 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 15:47:54,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220079858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:47:54,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:47:54,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 15:47:54,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192863346] [2021-06-05 15:47:54,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 15:47:54,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:47:54,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 15:47:54,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:47:54,189 INFO L87 Difference]: Start difference. First operand 113313 states and 422190 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 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 15:47:54,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:47:54,815 INFO L93 Difference]: Finished difference Result 127937 states and 472018 transitions. [2021-06-05 15:47:54,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 15:47:54,815 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 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 34 [2021-06-05 15:47:54,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:47:55,763 INFO L225 Difference]: With dead ends: 127937 [2021-06-05 15:47:55,763 INFO L226 Difference]: Without dead ends: 127901 [2021-06-05 15:47:55,763 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 27.2ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:47:55,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127901 states. [2021-06-05 15:47:58,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127901 to 121383. [2021-06-05 15:47:58,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121383 states, 121382 states have (on average 3.7288807236657826) internal successors, (452619), 121382 states have internal predecessors, (452619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:47:58,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121383 states to 121383 states and 452619 transitions. [2021-06-05 15:47:58,743 INFO L78 Accepts]: Start accepts. Automaton has 121383 states and 452619 transitions. Word has length 34 [2021-06-05 15:47:58,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:47:58,743 INFO L482 AbstractCegarLoop]: Abstraction has 121383 states and 452619 transitions. [2021-06-05 15:47:58,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 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 15:47:58,743 INFO L276 IsEmpty]: Start isEmpty. Operand 121383 states and 452619 transitions. [2021-06-05 15:47:58,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:47:58,863 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:47:58,863 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:47:59,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2021-06-05 15:47:59,064 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:47:59,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:47:59,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1561990614, now seen corresponding path program 98 times [2021-06-05 15:47:59,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:47:59,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565320131] [2021-06-05 15:47:59,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:47:59,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:47:59,085 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:47:59,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:47:59,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565320131] [2021-06-05 15:47:59,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565320131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:47:59,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543263060] [2021-06-05 15:47:59,085 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 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 15:47:59,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:47:59,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:47:59,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 15:47:59,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:47:59,154 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 15:47:59,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543263060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:47:59,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:47:59,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 15:47:59,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612231309] [2021-06-05 15:47:59,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 15:47:59,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:47:59,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 15:47:59,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:47:59,155 INFO L87 Difference]: Start difference. First operand 121383 states and 452619 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 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 15:48:00,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:48:00,443 INFO L93 Difference]: Finished difference Result 138778 states and 510851 transitions. [2021-06-05 15:48:00,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 15:48:00,443 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 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 34 [2021-06-05 15:48:00,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:48:00,865 INFO L225 Difference]: With dead ends: 138778 [2021-06-05 15:48:00,865 INFO L226 Difference]: Without dead ends: 138767 [2021-06-05 15:48:00,866 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 35.1ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:48:01,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138767 states. [2021-06-05 15:48:03,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138767 to 121225. [2021-06-05 15:48:03,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121225 states, 121224 states have (on average 3.728568600277173) internal successors, (451992), 121224 states have internal predecessors, (451992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:03,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121225 states to 121225 states and 451992 transitions. [2021-06-05 15:48:03,811 INFO L78 Accepts]: Start accepts. Automaton has 121225 states and 451992 transitions. Word has length 34 [2021-06-05 15:48:03,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:48:03,811 INFO L482 AbstractCegarLoop]: Abstraction has 121225 states and 451992 transitions. [2021-06-05 15:48:03,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 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 15:48:03,811 INFO L276 IsEmpty]: Start isEmpty. Operand 121225 states and 451992 transitions. [2021-06-05 15:48:03,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 15:48:03,955 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:48:03,955 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:48:04,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:48:04,155 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:48:04,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:48:04,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1478942404, now seen corresponding path program 99 times [2021-06-05 15:48:04,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:48:04,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906706090] [2021-06-05 15:48:04,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:48:04,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:48:04,183 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 15:48:04,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:48:04,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906706090] [2021-06-05 15:48:04,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906706090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:04,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952384397] [2021-06-05 15:48:04,184 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 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 15:48:04,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:48:04,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:48:04,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 15:48:04,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:48:04,258 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 15:48:04,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952384397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:04,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:48:04,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 15:48:04,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385741638] [2021-06-05 15:48:04,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 15:48:04,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:48:04,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 15:48:04,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:48:04,259 INFO L87 Difference]: Start difference. First operand 121225 states and 451992 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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 15:48:05,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:48:05,549 INFO L93 Difference]: Finished difference Result 130469 states and 476570 transitions. [2021-06-05 15:48:05,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 15:48:05,550 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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 35 [2021-06-05 15:48:05,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:48:05,959 INFO L225 Difference]: With dead ends: 130469 [2021-06-05 15:48:05,959 INFO L226 Difference]: Without dead ends: 130433 [2021-06-05 15:48:05,960 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 59.0ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:48:06,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130433 states. [2021-06-05 15:48:08,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130433 to 120737. [2021-06-05 15:48:08,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120737 states, 120736 states have (on average 3.6850483699973497) internal successors, (444918), 120736 states have internal predecessors, (444918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:08,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120737 states to 120737 states and 444918 transitions. [2021-06-05 15:48:08,951 INFO L78 Accepts]: Start accepts. Automaton has 120737 states and 444918 transitions. Word has length 35 [2021-06-05 15:48:08,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:48:08,951 INFO L482 AbstractCegarLoop]: Abstraction has 120737 states and 444918 transitions. [2021-06-05 15:48:08,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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 15:48:08,952 INFO L276 IsEmpty]: Start isEmpty. Operand 120737 states and 444918 transitions. [2021-06-05 15:48:09,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 15:48:09,099 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:48:09,099 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:48:09,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:48:09,313 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:48:09,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:48:09,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1852449502, now seen corresponding path program 100 times [2021-06-05 15:48:09,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:48:09,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573024056] [2021-06-05 15:48:09,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:48:09,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:48:09,353 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:48:09,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:48:09,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573024056] [2021-06-05 15:48:09,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573024056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:09,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276099647] [2021-06-05 15:48:09,353 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 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 15:48:09,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:48:09,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:48:09,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 15:48:09,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:48:09,460 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:48:09,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276099647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:09,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:48:09,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 14 [2021-06-05 15:48:09,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881519040] [2021-06-05 15:48:09,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:48:09,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:48:09,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:48:09,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:48:09,461 INFO L87 Difference]: Start difference. First operand 120737 states and 444918 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:10,490 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-06-05 15:48:14,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:48:14,298 INFO L93 Difference]: Finished difference Result 330781 states and 1196551 transitions. [2021-06-05 15:48:14,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2021-06-05 15:48:14,299 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 15:48:14,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:48:16,041 INFO L225 Difference]: With dead ends: 330781 [2021-06-05 15:48:16,041 INFO L226 Difference]: Without dead ends: 328223 [2021-06-05 15:48:16,042 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9784 ImplicationChecksByTransitivity, 2407.9ms TimeCoverageRelationStatistics Valid=3887, Invalid=18763, Unknown=0, NotChecked=0, Total=22650 [2021-06-05 15:48:16,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328223 states. [2021-06-05 15:48:21,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328223 to 206609. [2021-06-05 15:48:21,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206609 states, 206608 states have (on average 3.7288197940060406) internal successors, (770404), 206608 states have internal predecessors, (770404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:23,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206609 states to 206609 states and 770404 transitions. [2021-06-05 15:48:23,512 INFO L78 Accepts]: Start accepts. Automaton has 206609 states and 770404 transitions. Word has length 35 [2021-06-05 15:48:23,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:48:23,512 INFO L482 AbstractCegarLoop]: Abstraction has 206609 states and 770404 transitions. [2021-06-05 15:48:23,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:23,513 INFO L276 IsEmpty]: Start isEmpty. Operand 206609 states and 770404 transitions. [2021-06-05 15:48:23,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 15:48:23,728 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:48:23,728 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:48:23,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:48:23,945 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:48:23,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:48:23,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1367087600, now seen corresponding path program 101 times [2021-06-05 15:48:23,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:48:23,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091320589] [2021-06-05 15:48:23,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:48:23,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:48:23,968 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:48:23,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:48:23,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091320589] [2021-06-05 15:48:23,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091320589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:23,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334373723] [2021-06-05 15:48:23,968 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 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 15:48:24,020 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:48:24,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:48:24,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 15:48:24,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:48:24,093 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:48:24,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334373723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:24,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:48:24,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 15:48:24,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052161315] [2021-06-05 15:48:24,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 15:48:24,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:48:24,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 15:48:24,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:48:24,094 INFO L87 Difference]: Start difference. First operand 206609 states and 770404 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:26,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:48:26,717 INFO L93 Difference]: Finished difference Result 229213 states and 842009 transitions. [2021-06-05 15:48:26,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 15:48:26,717 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 15:48:26,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:48:27,424 INFO L225 Difference]: With dead ends: 229213 [2021-06-05 15:48:27,425 INFO L226 Difference]: Without dead ends: 228931 [2021-06-05 15:48:27,425 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1735 ImplicationChecksByTransitivity, 524.2ms TimeCoverageRelationStatistics Valid=951, Invalid=3879, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 15:48:27,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228931 states. [2021-06-05 15:48:32,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228931 to 215342. [2021-06-05 15:48:32,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215342 states, 215341 states have (on average 3.7305204303871533) internal successors, (803334), 215341 states have internal predecessors, (803334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:33,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215342 states to 215342 states and 803334 transitions. [2021-06-05 15:48:33,462 INFO L78 Accepts]: Start accepts. Automaton has 215342 states and 803334 transitions. Word has length 35 [2021-06-05 15:48:33,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:48:33,462 INFO L482 AbstractCegarLoop]: Abstraction has 215342 states and 803334 transitions. [2021-06-05 15:48:33,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:33,462 INFO L276 IsEmpty]: Start isEmpty. Operand 215342 states and 803334 transitions. [2021-06-05 15:48:33,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:48:33,711 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:48:33,711 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:48:33,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:48:33,912 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:48:33,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:48:33,912 INFO L82 PathProgramCache]: Analyzing trace with hash 355190302, now seen corresponding path program 102 times [2021-06-05 15:48:33,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:48:33,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172167034] [2021-06-05 15:48:33,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:48:33,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:48:34,966 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:48:34,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:48:34,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172167034] [2021-06-05 15:48:34,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172167034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:34,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498005125] [2021-06-05 15:48:34,967 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 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 15:48:35,004 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:48:35,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:48:35,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 15:48:35,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:48:35,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 15:48:35,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:48:35,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:48:35,131 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:48:35,131 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-06-05 15:48:35,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:48:35,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2021-06-05 15:48:35,204 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:48:35,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:48:35,215 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:48:35,215 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:49 [2021-06-05 15:48:35,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2021-06-05 15:48:35,333 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:48:35,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:48:35,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 29 [2021-06-05 15:48:35,343 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:48:35,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:48:35,351 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:48:35,351 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:28 [2021-06-05 15:48:35,435 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:48:35,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 39 [2021-06-05 15:48:35,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:48:35,447 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:48:35,449 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:48:35,449 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:24 [2021-06-05 15:48:35,525 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:48:35,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498005125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:35,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:48:35,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-06-05 15:48:35,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512388030] [2021-06-05 15:48:35,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 15:48:35,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:48:35,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 15:48:35,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:48:35,527 INFO L87 Difference]: Start difference. First operand 215342 states and 803334 transitions. Second operand has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 30 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:40,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:48:40,265 INFO L93 Difference]: Finished difference Result 324747 states and 1205125 transitions. [2021-06-05 15:48:40,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:48:40,265 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 30 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:48:40,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:48:41,502 INFO L225 Difference]: With dead ends: 324747 [2021-06-05 15:48:41,503 INFO L226 Difference]: Without dead ends: 324573 [2021-06-05 15:48:41,503 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 2648.5ms TimeCoverageRelationStatistics Valid=458, Invalid=2848, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 15:48:41,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324573 states. [2021-06-05 15:48:46,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324573 to 215554. [2021-06-05 15:48:46,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215554 states, 215553 states have (on average 3.7299272104772374) internal successors, (803997), 215553 states have internal predecessors, (803997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:48,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215554 states to 215554 states and 803997 transitions. [2021-06-05 15:48:48,018 INFO L78 Accepts]: Start accepts. Automaton has 215554 states and 803997 transitions. Word has length 37 [2021-06-05 15:48:48,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:48:48,018 INFO L482 AbstractCegarLoop]: Abstraction has 215554 states and 803997 transitions. [2021-06-05 15:48:48,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 30 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:48,018 INFO L276 IsEmpty]: Start isEmpty. Operand 215554 states and 803997 transitions. [2021-06-05 15:48:48,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:48:48,251 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:48:48,251 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:48:48,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2021-06-05 15:48:48,452 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:48:48,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:48:48,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1235101602, now seen corresponding path program 103 times [2021-06-05 15:48:48,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:48:48,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615139751] [2021-06-05 15:48:48,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:48:48,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:48:48,792 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:48:48,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:48:48,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615139751] [2021-06-05 15:48:48,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615139751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:48,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917126412] [2021-06-05 15:48:48,792 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 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 15:48:48,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:48:48,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:48:48,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:48:48,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 15:48:48,975 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:48:48,984 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:48:48,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:48:48,985 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:37 [2021-06-05 15:48:49,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:48:49,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:48:49,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 15:48:49,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:48:49,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:48:49,076 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:48:49,076 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:56 [2021-06-05 15:48:49,774 INFO L446 ElimStorePlain]: Different costs {0=[A], 2=[v_C_155]} [2021-06-05 15:48:49,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2021-06-05 15:48:49,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:48:49,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:48:49,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:48:49,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:48:49,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 29 [2021-06-05 15:48:49,791 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:48:49,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:48:49,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:48:49,798 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:38 [2021-06-05 15:48:49,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2021-06-05 15:48:49,870 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:48:49,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:48:49,874 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:48:49,874 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 15:48:49,910 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:48:49,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917126412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:49,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:48:49,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 28 [2021-06-05 15:48:49,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474519057] [2021-06-05 15:48:49,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 15:48:49,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:48:49,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 15:48:49,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:48:49,911 INFO L87 Difference]: Start difference. First operand 215554 states and 803997 transitions. Second operand has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:48:53,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:48:53,016 INFO L93 Difference]: Finished difference Result 321607 states and 1194609 transitions. [2021-06-05 15:48:53,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:48:53,016 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:48:53,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:48:54,789 INFO L225 Difference]: With dead ends: 321607 [2021-06-05 15:48:54,789 INFO L226 Difference]: Without dead ends: 321469 [2021-06-05 15:48:54,790 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 1778.4ms TimeCoverageRelationStatistics Valid=333, Invalid=1829, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:48:55,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321469 states. [2021-06-05 15:49:01,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321469 to 215627. [2021-06-05 15:49:01,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215627 states, 215626 states have (on average 3.729689369556547) internal successors, (804218), 215626 states have internal predecessors, (804218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:02,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215627 states to 215627 states and 804218 transitions. [2021-06-05 15:49:02,229 INFO L78 Accepts]: Start accepts. Automaton has 215627 states and 804218 transitions. Word has length 37 [2021-06-05 15:49:02,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:49:02,229 INFO L482 AbstractCegarLoop]: Abstraction has 215627 states and 804218 transitions. [2021-06-05 15:49:02,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:02,229 INFO L276 IsEmpty]: Start isEmpty. Operand 215627 states and 804218 transitions. [2021-06-05 15:49:02,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:49:02,458 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:49:02,458 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:49:02,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:49:02,659 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:49:02,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:49:02,659 INFO L82 PathProgramCache]: Analyzing trace with hash -366535714, now seen corresponding path program 104 times [2021-06-05 15:49:02,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:49:02,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041978017] [2021-06-05 15:49:02,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:49:02,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:49:03,046 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:49:03,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:49:03,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041978017] [2021-06-05 15:49:03,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041978017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:03,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31866471] [2021-06-05 15:49:03,047 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 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 15:49:03,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:49:03,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:49:03,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:49:03,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:49:03,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 15:49:03,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:49:03,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:49:03,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:49:03,969 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:39 [2021-06-05 15:49:04,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:04,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 15:49:04,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:49:04,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:49:04,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:49:04,022 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:53, output treesize:52 [2021-06-05 15:49:04,148 INFO L446 ElimStorePlain]: Different costs {0=[A], 3=[v_C_158]} [2021-06-05 15:49:04,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2021-06-05 15:49:04,151 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:49:04,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:49:04,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:04,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:49:04,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 31 [2021-06-05 15:49:04,162 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:49:04,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:49:04,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:49:04,170 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:61, output treesize:35 [2021-06-05 15:49:04,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2021-06-05 15:49:04,208 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:49:04,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:49:04,213 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:49:04,213 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 15:49:04,247 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:49:04,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31866471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:04,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:49:04,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 28 [2021-06-05 15:49:04,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371555470] [2021-06-05 15:49:04,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 15:49:04,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:49:04,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 15:49:04,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:49:04,249 INFO L87 Difference]: Start difference. First operand 215627 states and 804218 transitions. Second operand has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:07,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:49:07,573 INFO L93 Difference]: Finished difference Result 320502 states and 1190679 transitions. [2021-06-05 15:49:07,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:49:07,573 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:49:07,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:49:09,285 INFO L225 Difference]: With dead ends: 320502 [2021-06-05 15:49:09,286 INFO L226 Difference]: Without dead ends: 320448 [2021-06-05 15:49:09,286 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 1450.9ms TimeCoverageRelationStatistics Valid=374, Invalid=1882, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:49:09,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320448 states. [2021-06-05 15:49:13,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320448 to 215755. [2021-06-05 15:49:14,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215755 states, 215754 states have (on average 3.7293306265469006) internal successors, (804618), 215754 states have internal predecessors, (804618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:15,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215755 states to 215755 states and 804618 transitions. [2021-06-05 15:49:15,690 INFO L78 Accepts]: Start accepts. Automaton has 215755 states and 804618 transitions. Word has length 37 [2021-06-05 15:49:15,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:49:15,690 INFO L482 AbstractCegarLoop]: Abstraction has 215755 states and 804618 transitions. [2021-06-05 15:49:15,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:15,691 INFO L276 IsEmpty]: Start isEmpty. Operand 215755 states and 804618 transitions. [2021-06-05 15:49:15,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:49:15,951 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:49:15,952 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:49:16,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:49:16,152 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:49:16,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:49:16,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1956827618, now seen corresponding path program 105 times [2021-06-05 15:49:16,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:49:16,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656944974] [2021-06-05 15:49:16,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:49:16,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:49:16,516 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:49:16,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:49:16,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656944974] [2021-06-05 15:49:16,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656944974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:16,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280976621] [2021-06-05 15:49:16,516 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 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 15:49:16,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:49:16,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:49:16,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 15:49:16,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:49:16,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 15:49:16,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:49:16,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:49:16,746 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 1 xjuncts. [2021-06-05 15:49:16,746 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:41 [2021-06-05 15:49:16,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:16,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 15:49:16,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:49:16,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:49:16,830 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 1 xjuncts. [2021-06-05 15:49:16,830 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:58, output treesize:57 [2021-06-05 15:49:17,036 INFO L446 ElimStorePlain]: Different costs {3=[v_C_161], 14=[A]} [2021-06-05 15:49:17,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:17,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:17,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:17,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 45 [2021-06-05 15:49:17,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:49:17,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:49:17,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:17,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:17,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:17,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:17,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:17,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:49:17,065 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:49:17,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 38 [2021-06-05 15:49:17,066 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 15:49:17,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:49:17,080 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:49:17,081 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:72, output treesize:41 [2021-06-05 15:49:17,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 15:49:17,178 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:49:17,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2021-06-05 15:49:17,181 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:49:17,198 INFO L628 ElimStorePlain]: treesize reduction 3, result has 87.0 percent of original size [2021-06-05 15:49:17,198 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:49:17,198 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:56, output treesize:20 [2021-06-05 15:49:17,280 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:49:17,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280976621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:17,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:49:17,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-06-05 15:49:17,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555353980] [2021-06-05 15:49:17,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 15:49:17,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:49:17,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 15:49:17,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:49:17,281 INFO L87 Difference]: Start difference. First operand 215755 states and 804618 transitions. Second operand has 32 states, 32 states have (on average 2.125) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:18,531 WARN L205 SmtUtils]: Spent 565.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2021-06-05 15:49:23,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:49:23,017 INFO L93 Difference]: Finished difference Result 320329 states and 1190063 transitions. [2021-06-05 15:49:23,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 15:49:23,018 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:49:23,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:49:24,859 INFO L225 Difference]: With dead ends: 320329 [2021-06-05 15:49:24,859 INFO L226 Difference]: Without dead ends: 320275 [2021-06-05 15:49:24,859 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 3220.3ms TimeCoverageRelationStatistics Valid=432, Invalid=3600, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 15:49:25,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320275 states. [2021-06-05 15:49:29,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320275 to 215832. [2021-06-05 15:49:29,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215832 states, 215831 states have (on average 3.7291306624164275) internal successors, (804862), 215831 states have internal predecessors, (804862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:31,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215832 states to 215832 states and 804862 transitions. [2021-06-05 15:49:31,431 INFO L78 Accepts]: Start accepts. Automaton has 215832 states and 804862 transitions. Word has length 37 [2021-06-05 15:49:31,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:49:31,431 INFO L482 AbstractCegarLoop]: Abstraction has 215832 states and 804862 transitions. [2021-06-05 15:49:31,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:31,431 INFO L276 IsEmpty]: Start isEmpty. Operand 215832 states and 804862 transitions. [2021-06-05 15:49:31,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:49:31,708 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:49:31,708 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:49:31,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:49:31,909 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:49:31,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:49:31,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1096164250, now seen corresponding path program 106 times [2021-06-05 15:49:31,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:49:31,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707468092] [2021-06-05 15:49:31,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:49:31,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:49:32,293 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:49:32,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:49:32,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707468092] [2021-06-05 15:49:32,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707468092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:32,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721904748] [2021-06-05 15:49:32,294 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 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 15:49:32,321 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:49:32,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:49:32,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:49:32,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:49:32,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 15:49:32,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:49:32,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:49:32,477 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:49:32,477 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:37 [2021-06-05 15:49:32,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:32,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 15:49:32,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:49:32,529 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:49:32,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:49:32,530 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:50 [2021-06-05 15:49:32,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2021-06-05 15:49:32,573 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:49:32,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:49:32,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2021-06-05 15:49:32,581 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:49:32,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:49:32,588 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:49:32,588 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:27 [2021-06-05 15:49:32,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 15:49:32,684 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:49:32,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:49:32,692 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:49:32,692 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:12 [2021-06-05 15:49:32,726 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:49:32,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721904748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:32,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:49:32,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 15:49:32,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172921346] [2021-06-05 15:49:32,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:49:32,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:49:32,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:49:32,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:49:32,727 INFO L87 Difference]: Start difference. First operand 215832 states and 804862 transitions. Second operand has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:34,374 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2021-06-05 15:49:40,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:49:40,595 INFO L93 Difference]: Finished difference Result 425358 states and 1539803 transitions. [2021-06-05 15:49:40,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 15:49:40,595 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:49:40,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:49:42,872 INFO L225 Difference]: With dead ends: 425358 [2021-06-05 15:49:42,872 INFO L226 Difference]: Without dead ends: 425220 [2021-06-05 15:49:42,873 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2060 ImplicationChecksByTransitivity, 3447.5ms TimeCoverageRelationStatistics Valid=947, Invalid=6025, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 15:49:43,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425220 states. [2021-06-05 15:49:47,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425220 to 216458. [2021-06-05 15:49:47,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216458 states, 216457 states have (on average 3.727876668345214) internal successors, (806925), 216457 states have internal predecessors, (806925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:49,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216458 states to 216458 states and 806925 transitions. [2021-06-05 15:49:49,479 INFO L78 Accepts]: Start accepts. Automaton has 216458 states and 806925 transitions. Word has length 37 [2021-06-05 15:49:49,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:49:49,480 INFO L482 AbstractCegarLoop]: Abstraction has 216458 states and 806925 transitions. [2021-06-05 15:49:49,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:49,480 INFO L276 IsEmpty]: Start isEmpty. Operand 216458 states and 806925 transitions. [2021-06-05 15:49:49,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:49:49,716 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:49:49,716 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:49:49,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable298,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:49:49,917 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:49:49,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:49:49,917 INFO L82 PathProgramCache]: Analyzing trace with hash 964753098, now seen corresponding path program 107 times [2021-06-05 15:49:49,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:49:49,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374706909] [2021-06-05 15:49:49,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:49:49,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:49:50,380 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:49:50,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:49:50,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374706909] [2021-06-05 15:49:50,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374706909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:50,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001477015] [2021-06-05 15:49:50,381 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 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 15:49:50,419 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:49:50,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:49:50,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 15:49:50,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:49:50,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 15:49:50,546 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:49:50,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:49:50,557 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:49:50,557 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:35 [2021-06-05 15:49:50,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:50,666 INFO L354 Elim1Store]: treesize reduction 35, result has 30.0 percent of original size [2021-06-05 15:49:50,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 48 [2021-06-05 15:49:50,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:49:50,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:49:50,681 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:49:50,682 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:56, output treesize:59 [2021-06-05 15:49:51,503 INFO L446 ElimStorePlain]: Different costs {10=[v_C_167], 12=[A]} [2021-06-05 15:49:51,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:51,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:51,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:51,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:51,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:51,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:51,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:51,516 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:49:51,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 59 [2021-06-05 15:49:51,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:49:51,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:49:51,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:51,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:51,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:51,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:51,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:51,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:51,563 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:49:51,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 86 [2021-06-05 15:49:51,573 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 15:49:51,603 INFO L628 ElimStorePlain]: treesize reduction 41, result has 54.4 percent of original size [2021-06-05 15:49:51,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 15:49:51,612 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:74, output treesize:49 [2021-06-05 15:49:51,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:51,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:51,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:51,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:51,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:51,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:51,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:51,855 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:49:51,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 33 treesize of output 93 [2021-06-05 15:49:51,944 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 15:49:51,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:49:51,962 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:49:51,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 25 [2021-06-05 15:49:51,965 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:49:52,055 INFO L628 ElimStorePlain]: treesize reduction 319, result has 13.1 percent of original size [2021-06-05 15:49:52,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:49:52,062 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:84, output treesize:25 [2021-06-05 15:49:52,174 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:49:52,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001477015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:49:52,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:49:52,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-06-05 15:49:52,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028026935] [2021-06-05 15:49:52,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:49:52,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:49:52,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:49:52,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:49:52,175 INFO L87 Difference]: Start difference. First operand 216458 states and 806925 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:49:56,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:49:56,918 INFO L93 Difference]: Finished difference Result 325391 states and 1207086 transitions. [2021-06-05 15:49:56,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 15:49:56,919 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:49:56,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:49:58,132 INFO L225 Difference]: With dead ends: 325391 [2021-06-05 15:49:58,133 INFO L226 Difference]: Without dead ends: 325289 [2021-06-05 15:49:58,133 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 2863.3ms TimeCoverageRelationStatistics Valid=399, Invalid=2357, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 15:49:58,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325289 states. [2021-06-05 15:50:02,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325289 to 216645. [2021-06-05 15:50:03,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216645 states, 216644 states have (on average 3.7275484204501392) internal successors, (807551), 216644 states have internal predecessors, (807551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:05,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216645 states to 216645 states and 807551 transitions. [2021-06-05 15:50:05,751 INFO L78 Accepts]: Start accepts. Automaton has 216645 states and 807551 transitions. Word has length 37 [2021-06-05 15:50:05,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:50:05,751 INFO L482 AbstractCegarLoop]: Abstraction has 216645 states and 807551 transitions. [2021-06-05 15:50:05,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:05,751 INFO L276 IsEmpty]: Start isEmpty. Operand 216645 states and 807551 transitions. [2021-06-05 15:50:06,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:50:06,106 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:50:06,106 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:50:06,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2021-06-05 15:50:06,321 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:50:06,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:50:06,321 INFO L82 PathProgramCache]: Analyzing trace with hash 876324308, now seen corresponding path program 108 times [2021-06-05 15:50:06,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:50:06,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473490910] [2021-06-05 15:50:06,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:50:06,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:06,843 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:06,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:50:06,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473490910] [2021-06-05 15:50:06,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473490910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:06,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761279037] [2021-06-05 15:50:06,844 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 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 15:50:06,879 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:50:06,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:50:06,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:50:06,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:50:07,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 15:50:07,019 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:07,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:07,035 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:50:07,035 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:71, output treesize:70 [2021-06-05 15:50:07,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-06-05 15:50:07,231 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:07,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:07,250 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:50:07,250 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:61, output treesize:60 [2021-06-05 15:50:07,314 INFO L446 ElimStorePlain]: Different costs {2=[v_C_170], 3=[A]} [2021-06-05 15:50:07,337 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-06-05 15:50:07,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 37 [2021-06-05 15:50:07,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:07,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:07,396 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 15:50:07,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 40 [2021-06-05 15:50:07,399 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 15:50:07,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:07,418 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 1 xjuncts. [2021-06-05 15:50:07,418 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:75, output treesize:53 [2021-06-05 15:50:07,615 INFO L446 ElimStorePlain]: Different costs {2=[C], 5=[v_prenex_4]} [2021-06-05 15:50:07,629 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:07,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 23 [2021-06-05 15:50:07,632 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:07,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:07,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:07,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:07,679 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:07,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 47 [2021-06-05 15:50:07,687 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 15:50:07,714 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:07,720 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 15:50:07,720 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:94, output treesize:56 [2021-06-05 15:50:07,926 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:07,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761279037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:07,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:07,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2021-06-05 15:50:07,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41648443] [2021-06-05 15:50:07,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:50:07,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:07,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:50:07,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:50:07,928 INFO L87 Difference]: Start difference. First operand 216645 states and 807551 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:08,628 WARN L205 SmtUtils]: Spent 444.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-06-05 15:50:12,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:50:12,984 INFO L93 Difference]: Finished difference Result 323254 states and 1199966 transitions. [2021-06-05 15:50:12,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:50:12,984 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:50:12,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:50:14,796 INFO L225 Difference]: With dead ends: 323254 [2021-06-05 15:50:14,796 INFO L226 Difference]: Without dead ends: 323075 [2021-06-05 15:50:14,797 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 2751.1ms TimeCoverageRelationStatistics Valid=334, Invalid=2018, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 15:50:15,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323075 states. [2021-06-05 15:50:19,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323075 to 216624. [2021-06-05 15:50:19,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216624 states, 216623 states have (on average 3.727655881416101) internal successors, (807496), 216623 states have internal predecessors, (807496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:21,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216624 states to 216624 states and 807496 transitions. [2021-06-05 15:50:21,472 INFO L78 Accepts]: Start accepts. Automaton has 216624 states and 807496 transitions. Word has length 37 [2021-06-05 15:50:21,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:50:21,472 INFO L482 AbstractCegarLoop]: Abstraction has 216624 states and 807496 transitions. [2021-06-05 15:50:21,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:21,472 INFO L276 IsEmpty]: Start isEmpty. Operand 216624 states and 807496 transitions. [2021-06-05 15:50:21,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:50:21,754 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:50:21,754 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:50:21,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2021-06-05 15:50:21,955 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:50:21,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:50:21,955 INFO L82 PathProgramCache]: Analyzing trace with hash 500337086, now seen corresponding path program 109 times [2021-06-05 15:50:21,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:50:21,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881802397] [2021-06-05 15:50:21,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:50:21,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:22,421 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:22,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:50:22,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881802397] [2021-06-05 15:50:22,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881802397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:22,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044949284] [2021-06-05 15:50:22,422 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 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 15:50:22,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:22,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:50:22,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:50:22,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 15:50:22,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:22,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:22,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:50:22,565 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:66, output treesize:65 [2021-06-05 15:50:22,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:22,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 15:50:22,642 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:22,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:22,657 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:50:22,657 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:79, output treesize:78 [2021-06-05 15:50:22,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 35 [2021-06-05 15:50:22,740 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 15:50:22,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:22,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 37 [2021-06-05 15:50:22,752 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:22,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:22,762 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:50:22,762 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:43 [2021-06-05 15:50:22,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2021-06-05 15:50:22,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:22,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:22,833 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:50:22,833 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:17 [2021-06-05 15:50:22,869 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:22,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044949284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:22,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:22,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 15:50:22,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794093555] [2021-06-05 15:50:22,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:50:22,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:22,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:50:22,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:50:22,870 INFO L87 Difference]: Start difference. First operand 216624 states and 807496 transitions. Second operand has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:26,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:50:26,636 INFO L93 Difference]: Finished difference Result 322219 states and 1196250 transitions. [2021-06-05 15:50:26,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:50:26,637 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:50:26,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:50:27,831 INFO L225 Difference]: With dead ends: 322219 [2021-06-05 15:50:27,831 INFO L226 Difference]: Without dead ends: 322165 [2021-06-05 15:50:27,832 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 913.6ms TimeCoverageRelationStatistics Valid=159, Invalid=833, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:50:28,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322165 states. [2021-06-05 15:50:32,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322165 to 216605. [2021-06-05 15:50:32,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216605 states, 216604 states have (on average 3.7277935772192574) internal successors, (807455), 216604 states have internal predecessors, (807455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:34,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216605 states to 216605 states and 807455 transitions. [2021-06-05 15:50:34,464 INFO L78 Accepts]: Start accepts. Automaton has 216605 states and 807455 transitions. Word has length 37 [2021-06-05 15:50:34,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:50:34,464 INFO L482 AbstractCegarLoop]: Abstraction has 216605 states and 807455 transitions. [2021-06-05 15:50:34,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:34,465 INFO L276 IsEmpty]: Start isEmpty. Operand 216605 states and 807455 transitions. [2021-06-05 15:50:34,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:50:34,705 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:50:34,705 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:50:34,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable358 [2021-06-05 15:50:34,906 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:50:34,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:50:34,906 INFO L82 PathProgramCache]: Analyzing trace with hash -842986744, now seen corresponding path program 110 times [2021-06-05 15:50:34,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:50:34,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12619323] [2021-06-05 15:50:34,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:50:34,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:35,344 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:35,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:50:35,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12619323] [2021-06-05 15:50:35,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12619323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:35,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662459442] [2021-06-05 15:50:35,344 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 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 15:50:35,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:50:35,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:50:35,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:50:35,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:50:35,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 15:50:35,448 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:35,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:35,460 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:50:35,460 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:54 [2021-06-05 15:50:35,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:35,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2021-06-05 15:50:35,616 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:35,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:35,634 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 1 xjuncts. [2021-06-05 15:50:35,634 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:86 [2021-06-05 15:50:36,419 INFO L446 ElimStorePlain]: Different costs {3=[v_C_176], 10=[A]} [2021-06-05 15:50:36,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:36,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:36,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:36,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 52 [2021-06-05 15:50:36,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:36,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:36,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:36,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:36,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:36,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:36,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:36,461 INFO L354 Elim1Store]: treesize reduction 46, result has 13.2 percent of original size [2021-06-05 15:50:36,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 85 treesize of output 57 [2021-06-05 15:50:36,463 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:36,473 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:36,473 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:50:36,474 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:100, output treesize:51 [2021-06-05 15:50:36,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 24 [2021-06-05 15:50:36,516 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:36,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:36,521 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:50:36,521 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:15 [2021-06-05 15:50:36,554 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:36,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662459442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:36,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:36,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 15:50:36,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951286811] [2021-06-05 15:50:36,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:50:36,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:36,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:50:36,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:50:36,555 INFO L87 Difference]: Start difference. First operand 216605 states and 807455 transitions. Second operand has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:39,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:50:39,710 INFO L93 Difference]: Finished difference Result 325469 states and 1207215 transitions. [2021-06-05 15:50:39,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:50:39,711 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:50:39,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:50:41,471 INFO L225 Difference]: With dead ends: 325469 [2021-06-05 15:50:41,471 INFO L226 Difference]: Without dead ends: 325309 [2021-06-05 15:50:41,472 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 1282.0ms TimeCoverageRelationStatistics Valid=282, Invalid=1278, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:50:41,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325309 states. [2021-06-05 15:50:46,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325309 to 216679. [2021-06-05 15:50:46,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216679 states, 216678 states have (on average 3.7276096327269035) internal successors, (807691), 216678 states have internal predecessors, (807691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:48,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216679 states to 216679 states and 807691 transitions. [2021-06-05 15:50:48,052 INFO L78 Accepts]: Start accepts. Automaton has 216679 states and 807691 transitions. Word has length 37 [2021-06-05 15:50:48,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:50:48,052 INFO L482 AbstractCegarLoop]: Abstraction has 216679 states and 807691 transitions. [2021-06-05 15:50:48,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:48,052 INFO L276 IsEmpty]: Start isEmpty. Operand 216679 states and 807691 transitions. [2021-06-05 15:50:48,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:50:48,332 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:50:48,332 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:50:48,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable359 [2021-06-05 15:50:48,532 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:50:48,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:50:48,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1861688648, now seen corresponding path program 111 times [2021-06-05 15:50:48,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:50:48,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979770058] [2021-06-05 15:50:48,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:50:48,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:50:49,001 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:49,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:50:49,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979770058] [2021-06-05 15:50:49,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979770058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:49,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671185657] [2021-06-05 15:50:49,001 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 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 15:50:49,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:50:49,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:50:49,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:50:49,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:50:49,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 15:50:49,145 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:49,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:49,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:50:49,158 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:49 [2021-06-05 15:50:49,346 INFO L354 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2021-06-05 15:50:49,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 29 [2021-06-05 15:50:49,348 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:49,362 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:49,363 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 1 xjuncts. [2021-06-05 15:50:49,363 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:74, output treesize:71 [2021-06-05 15:50:49,525 INFO L446 ElimStorePlain]: Different costs {3=[v_C_179], 10=[A]} [2021-06-05 15:50:49,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:49,540 INFO L354 Elim1Store]: treesize reduction 29, result has 14.7 percent of original size [2021-06-05 15:50:49,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 34 [2021-06-05 15:50:49,541 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:50:49,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:49,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:49,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:49,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:49,594 INFO L354 Elim1Store]: treesize reduction 36, result has 46.3 percent of original size [2021-06-05 15:50:49,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 61 treesize of output 67 [2021-06-05 15:50:49,602 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 15:50:49,641 INFO L628 ElimStorePlain]: treesize reduction 56, result has 54.5 percent of original size [2021-06-05 15:50:49,653 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 15:50:49,653 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:89, output treesize:95 [2021-06-05 15:50:49,958 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_8], 10=[C]} [2021-06-05 15:50:49,975 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:49,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 12 treesize of output 31 [2021-06-05 15:50:49,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 15:50:50,048 INFO L628 ElimStorePlain]: treesize reduction 31, result has 78.0 percent of original size [2021-06-05 15:50:50,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:50,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:50:50,087 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:50:50,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 46 treesize of output 94 [2021-06-05 15:50:50,681 WARN L205 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 157 [2021-06-05 15:50:51,007 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-06-05 15:50:51,687 WARN L205 SmtUtils]: Spent 679.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 82 [2021-06-05 15:50:51,688 INFO L628 ElimStorePlain]: treesize reduction 1482, result has 10.2 percent of original size [2021-06-05 15:50:51,730 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:50:51,730 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:124, output treesize:260 [2021-06-05 15:50:51,893 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:50:51,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671185657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:50:51,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:50:51,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 28 [2021-06-05 15:50:51,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892070006] [2021-06-05 15:50:51,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 15:50:51,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:50:51,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 15:50:51,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:50:51,894 INFO L87 Difference]: Start difference. First operand 216679 states and 807691 transitions. Second operand has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:50:57,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:50:57,076 INFO L93 Difference]: Finished difference Result 323625 states and 1201167 transitions. [2021-06-05 15:50:57,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 15:50:57,076 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:50:57,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:50:58,125 INFO L225 Difference]: With dead ends: 323625 [2021-06-05 15:50:58,125 INFO L226 Difference]: Without dead ends: 323314 [2021-06-05 15:50:58,125 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 2866.4ms TimeCoverageRelationStatistics Valid=473, Invalid=3309, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 15:50:59,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323314 states. [2021-06-05 15:51:03,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323314 to 216643. [2021-06-05 15:51:04,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216643 states, 216642 states have (on average 3.727721309810655) internal successors, (807581), 216642 states have internal predecessors, (807581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:05,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216643 states to 216643 states and 807581 transitions. [2021-06-05 15:51:05,761 INFO L78 Accepts]: Start accepts. Automaton has 216643 states and 807581 transitions. Word has length 37 [2021-06-05 15:51:05,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:51:05,762 INFO L482 AbstractCegarLoop]: Abstraction has 216643 states and 807581 transitions. [2021-06-05 15:51:05,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:05,762 INFO L276 IsEmpty]: Start isEmpty. Operand 216643 states and 807581 transitions. [2021-06-05 15:51:06,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:51:06,087 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:51:06,087 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:51:06,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:51:06,301 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:51:06,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:51:06,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1834321192, now seen corresponding path program 112 times [2021-06-05 15:51:06,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:51:06,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361672287] [2021-06-05 15:51:06,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:51:06,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:51:07,437 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:51:07,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:51:07,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361672287] [2021-06-05 15:51:07,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361672287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:07,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664975458] [2021-06-05 15:51:07,437 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 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 15:51:07,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:51:07,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:51:07,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:51:07,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:51:07,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 15:51:07,567 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:51:07,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:51:07,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:51:07,582 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:54 [2021-06-05 15:51:07,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:07,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2021-06-05 15:51:07,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:51:07,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:51:07,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:51:07,722 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:76, output treesize:71 [2021-06-05 15:51:08,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 40 [2021-06-05 15:51:08,044 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:51:08,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:51:08,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 35 [2021-06-05 15:51:08,066 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:51:08,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:51:08,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:51:08,092 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:72, output treesize:37 [2021-06-05 15:51:08,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2021-06-05 15:51:08,152 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:51:08,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:51:08,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:51:08,159 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:17 [2021-06-05 15:51:08,220 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:51:08,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664975458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:08,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:51:08,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 15:51:08,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57418062] [2021-06-05 15:51:08,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:51:08,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:51:08,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:51:08,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:51:08,221 INFO L87 Difference]: Start difference. First operand 216643 states and 807581 transitions. Second operand has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:11,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:51:11,276 INFO L93 Difference]: Finished difference Result 321834 states and 1194937 transitions. [2021-06-05 15:51:11,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:51:11,277 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:51:11,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:51:12,961 INFO L225 Difference]: With dead ends: 321834 [2021-06-05 15:51:12,961 INFO L226 Difference]: Without dead ends: 321686 [2021-06-05 15:51:12,961 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 2032.5ms TimeCoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:51:13,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321686 states. [2021-06-05 15:51:17,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321686 to 216659. [2021-06-05 15:51:17,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216659 states, 216658 states have (on average 3.7276814149489055) internal successors, (807632), 216658 states have internal predecessors, (807632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:19,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216659 states to 216659 states and 807632 transitions. [2021-06-05 15:51:19,498 INFO L78 Accepts]: Start accepts. Automaton has 216659 states and 807632 transitions. Word has length 37 [2021-06-05 15:51:19,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:51:19,498 INFO L482 AbstractCegarLoop]: Abstraction has 216659 states and 807632 transitions. [2021-06-05 15:51:19,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:19,498 INFO L276 IsEmpty]: Start isEmpty. Operand 216659 states and 807632 transitions. [2021-06-05 15:51:19,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:51:19,816 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:51:19,816 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:51:20,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:51:20,017 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:51:20,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:51:20,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1284650824, now seen corresponding path program 113 times [2021-06-05 15:51:20,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:51:20,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631450508] [2021-06-05 15:51:20,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:51:20,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:51:20,395 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:51:20,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:51:20,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631450508] [2021-06-05 15:51:20,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631450508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:20,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884269513] [2021-06-05 15:51:20,395 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 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 15:51:20,424 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 15:51:20,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:51:20,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:51:20,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:51:20,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 15:51:20,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:51:20,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:51:20,540 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:51:20,540 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:38 [2021-06-05 15:51:20,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:20,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:20,649 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:51:20,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 40 [2021-06-05 15:51:20,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:51:20,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:51:20,664 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:51:20,664 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:56, output treesize:55 [2021-06-05 15:51:20,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:20,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:20,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:20,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:20,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:20,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:20,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:20,801 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 15:51:20,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 61 [2021-06-05 15:51:20,802 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:51:20,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:51:20,820 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 1 xjuncts. [2021-06-05 15:51:20,820 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:73, output treesize:72 [2021-06-05 15:51:20,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:20,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:20,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:20,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:20,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:20,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:20,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:20,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:20,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:20,922 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:51:20,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 96 [2021-06-05 15:51:20,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:51:20,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:51:20,966 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 15:51:20,966 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:80, output treesize:48 [2021-06-05 15:51:21,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:21,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:21,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:21,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:21,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2021-06-05 15:51:21,107 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:51:21,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:51:21,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:51:21,116 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:12 [2021-06-05 15:51:21,164 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:51:21,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884269513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:21,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:51:21,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-06-05 15:51:21,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136657310] [2021-06-05 15:51:21,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:51:21,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:51:21,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:51:21,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:51:21,165 INFO L87 Difference]: Start difference. First operand 216659 states and 807632 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:25,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:51:25,194 INFO L93 Difference]: Finished difference Result 320671 states and 1191422 transitions. [2021-06-05 15:51:25,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:51:25,195 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:51:25,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:51:26,394 INFO L225 Difference]: With dead ends: 320671 [2021-06-05 15:51:26,394 INFO L226 Difference]: Without dead ends: 320650 [2021-06-05 15:51:26,394 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 1322.2ms TimeCoverageRelationStatistics Valid=221, Invalid=1339, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:51:26,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320650 states. [2021-06-05 15:51:31,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320650 to 216671. [2021-06-05 15:51:31,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216671 states, 216670 states have (on average 3.727650343840864) internal successors, (807670), 216670 states have internal predecessors, (807670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:32,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216671 states to 216671 states and 807670 transitions. [2021-06-05 15:51:32,812 INFO L78 Accepts]: Start accepts. Automaton has 216671 states and 807670 transitions. Word has length 37 [2021-06-05 15:51:32,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:51:32,812 INFO L482 AbstractCegarLoop]: Abstraction has 216671 states and 807670 transitions. [2021-06-05 15:51:32,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:32,812 INFO L276 IsEmpty]: Start isEmpty. Operand 216671 states and 807670 transitions. [2021-06-05 15:51:33,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:51:33,044 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:51:33,044 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:51:33,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:51:33,244 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:51:33,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:51:33,245 INFO L82 PathProgramCache]: Analyzing trace with hash -488176478, now seen corresponding path program 114 times [2021-06-05 15:51:33,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:51:33,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937705309] [2021-06-05 15:51:33,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:51:33,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:51:33,604 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:51:33,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:51:33,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937705309] [2021-06-05 15:51:33,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937705309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:33,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358660835] [2021-06-05 15:51:33,605 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 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 15:51:33,633 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:51:33,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:51:33,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:51:33,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:51:33,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 15:51:33,684 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:51:33,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:51:33,694 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:51:33,695 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:60, output treesize:59 [2021-06-05 15:51:33,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:33,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:33,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2021-06-05 15:51:33,765 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:51:33,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:51:33,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:51:33,778 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:75, output treesize:74 [2021-06-05 15:51:33,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:33,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:33,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:33,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:33,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 47 [2021-06-05 15:51:33,894 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:51:33,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:51:33,909 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:51:33,909 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:86, output treesize:89 [2021-06-05 15:51:34,612 WARN L205 SmtUtils]: Spent 678.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-06-05 15:51:34,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:34,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:34,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:34,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 41 [2021-06-05 15:51:34,623 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:51:34,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:51:34,631 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:51:34,631 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:88, output treesize:53 [2021-06-05 15:51:34,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 20 [2021-06-05 15:51:34,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:51:34,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:51:34,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:51:34,673 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:17 [2021-06-05 15:51:34,743 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:51:34,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358660835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:34,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:51:34,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 15:51:34,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716597221] [2021-06-05 15:51:34,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:51:34,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:51:34,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:51:34,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:51:34,744 INFO L87 Difference]: Start difference. First operand 216671 states and 807670 transitions. Second operand has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:39,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:51:39,302 INFO L93 Difference]: Finished difference Result 380615 states and 1412256 transitions. [2021-06-05 15:51:39,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:51:39,309 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:51:39,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:51:40,790 INFO L225 Difference]: With dead ends: 380615 [2021-06-05 15:51:40,790 INFO L226 Difference]: Without dead ends: 380587 [2021-06-05 15:51:40,790 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 2162.5ms TimeCoverageRelationStatistics Valid=287, Invalid=1969, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:51:41,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380587 states. [2021-06-05 15:51:46,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380587 to 216720. [2021-06-05 15:51:46,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216720 states, 216719 states have (on average 3.7275550367065184) internal successors, (807832), 216719 states have internal predecessors, (807832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:47,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216720 states to 216720 states and 807832 transitions. [2021-06-05 15:51:47,575 INFO L78 Accepts]: Start accepts. Automaton has 216720 states and 807832 transitions. Word has length 37 [2021-06-05 15:51:47,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:51:47,575 INFO L482 AbstractCegarLoop]: Abstraction has 216720 states and 807832 transitions. [2021-06-05 15:51:47,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:47,575 INFO L276 IsEmpty]: Start isEmpty. Operand 216720 states and 807832 transitions. [2021-06-05 15:51:48,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:51:48,646 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:51:48,646 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:51:48,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable468,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:51:48,846 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:51:48,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:51:48,847 INFO L82 PathProgramCache]: Analyzing trace with hash -135800788, now seen corresponding path program 115 times [2021-06-05 15:51:48,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:51:48,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388423888] [2021-06-05 15:51:48,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:51:48,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:51:49,288 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:51:49,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:51:49,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388423888] [2021-06-05 15:51:49,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388423888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:49,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684071493] [2021-06-05 15:51:49,288 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 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 15:51:49,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:51:49,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:51:49,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:51:49,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 15:51:49,389 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:51:49,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:51:49,401 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:51:49,401 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:63, output treesize:62 [2021-06-05 15:51:49,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:49,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:49,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-06-05 15:51:49,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:51:49,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:51:49,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:51:49,492 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:74, output treesize:77 [2021-06-05 15:51:49,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:49,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:51:49,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:49,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:51:49,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 52 [2021-06-05 15:51:49,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:51:49,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:51:49,589 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:51:49,589 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:89, output treesize:89 [2021-06-05 15:51:49,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 43 [2021-06-05 15:51:49,633 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:51:49,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:51:49,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:51:49,640 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:71, output treesize:36 [2021-06-05 15:51:49,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2021-06-05 15:51:49,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:51:49,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:51:49,677 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:51:49,677 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:17 [2021-06-05 15:51:49,739 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:51:49,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684071493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:51:49,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:51:49,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 15:51:49,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513241701] [2021-06-05 15:51:49,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:51:49,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:51:49,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:51:49,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:51:49,740 INFO L87 Difference]: Start difference. First operand 216720 states and 807832 transitions. Second operand has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:51:52,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:51:52,700 INFO L93 Difference]: Finished difference Result 322034 states and 1195739 transitions. [2021-06-05 15:51:52,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:51:52,700 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:51:52,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:51:54,519 INFO L225 Difference]: With dead ends: 322034 [2021-06-05 15:51:54,519 INFO L226 Difference]: Without dead ends: 321959 [2021-06-05 15:51:54,519 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 941.8ms TimeCoverageRelationStatistics Valid=192, Invalid=930, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:51:54,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321959 states. [2021-06-05 15:51:59,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321959 to 216732. [2021-06-05 15:51:59,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216732 states, 216731 states have (on average 3.727496297253277) internal successors, (807864), 216731 states have internal predecessors, (807864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:01,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216732 states to 216732 states and 807864 transitions. [2021-06-05 15:52:01,896 INFO L78 Accepts]: Start accepts. Automaton has 216732 states and 807864 transitions. Word has length 37 [2021-06-05 15:52:01,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:52:01,896 INFO L482 AbstractCegarLoop]: Abstraction has 216732 states and 807864 transitions. [2021-06-05 15:52:01,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:01,896 INFO L276 IsEmpty]: Start isEmpty. Operand 216732 states and 807864 transitions. [2021-06-05 15:52:02,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:52:02,199 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:52:02,199 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:52:02,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable469,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:52:02,413 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:52:02,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:52:02,413 INFO L82 PathProgramCache]: Analyzing trace with hash -674408686, now seen corresponding path program 116 times [2021-06-05 15:52:02,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:52:02,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433343350] [2021-06-05 15:52:02,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:52:02,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:52:02,905 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:52:02,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:52:02,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433343350] [2021-06-05 15:52:02,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433343350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:52:02,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744960480] [2021-06-05 15:52:02,906 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 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 15:52:02,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:52:02,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:52:02,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:52:02,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:52:03,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 15:52:03,032 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:52:03,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:52:03,050 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:52:03,050 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:63, output treesize:62 [2021-06-05 15:52:03,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:52:03,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2021-06-05 15:52:03,130 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:52:03,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:52:03,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:52:03,143 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:78, output treesize:77 [2021-06-05 15:52:03,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 39 [2021-06-05 15:52:03,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:52:03,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:52:03,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 34 [2021-06-05 15:52:03,962 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:52:03,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:52:03,970 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:52:03,970 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:71, output treesize:47 [2021-06-05 15:52:04,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2021-06-05 15:52:04,005 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:52:04,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:52:04,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:52:04,010 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:17 [2021-06-05 15:52:04,045 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:52:04,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744960480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:52:04,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:52:04,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 15:52:04,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381454544] [2021-06-05 15:52:04,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:52:04,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:52:04,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:52:04,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:52:04,046 INFO L87 Difference]: Start difference. First operand 216732 states and 807864 transitions. Second operand has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:06,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:52:06,808 INFO L93 Difference]: Finished difference Result 322027 states and 1195511 transitions. [2021-06-05 15:52:06,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:52:06,809 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:52:06,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:52:07,952 INFO L225 Difference]: With dead ends: 322027 [2021-06-05 15:52:07,952 INFO L226 Difference]: Without dead ends: 321867 [2021-06-05 15:52:07,953 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 1011.7ms TimeCoverageRelationStatistics Valid=183, Invalid=873, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:52:09,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321867 states. [2021-06-05 15:52:13,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321867 to 216769. [2021-06-05 15:52:13,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216769 states, 216768 states have (on average 3.727395187481547) internal successors, (807980), 216768 states have internal predecessors, (807980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:14,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216769 states to 216769 states and 807980 transitions. [2021-06-05 15:52:14,358 INFO L78 Accepts]: Start accepts. Automaton has 216769 states and 807980 transitions. Word has length 37 [2021-06-05 15:52:14,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:52:14,358 INFO L482 AbstractCegarLoop]: Abstraction has 216769 states and 807980 transitions. [2021-06-05 15:52:14,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:52:14,358 INFO L276 IsEmpty]: Start isEmpty. Operand 216769 states and 807980 transitions. [2021-06-05 15:52:15,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:52:15,413 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:52:15,413 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:52:15,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,119 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:52:15,635 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:52:15,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:52:15,636 INFO L82 PathProgramCache]: Analyzing trace with hash -2042746648, now seen corresponding path program 117 times [2021-06-05 15:52:15,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:52:15,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148115689] [2021-06-05 15:52:15,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:52:15,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:52:16,086 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:52:16,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:52:16,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148115689] [2021-06-05 15:52:16,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148115689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:52:16,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563961476] [2021-06-05 15:52:16,087 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 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 15:52:16,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:52:16,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:52:16,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 15:52:16,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:52:16,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 15:52:16,218 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:52:16,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:52:16,233 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:52:16,233 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:48 [2021-06-05 15:52:16,331 INFO L354 Elim1Store]: treesize reduction 31, result has 18.4 percent of original size [2021-06-05 15:52:16,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 33 [2021-06-05 15:52:16,333 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:52:16,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:52:16,350 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:52:16,350 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:73, output treesize:72 [2021-06-05 15:52:16,544 INFO L446 ElimStorePlain]: Different costs {3=[v_C_197], 7=[A]} [2021-06-05 15:52:16,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:52:16,562 INFO L354 Elim1Store]: treesize reduction 29, result has 14.7 percent of original size [2021-06-05 15:52:16,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 41 [2021-06-05 15:52:16,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:52:16,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:52:16,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:52:16,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:52:16,618 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-06-05 15:52:16,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 63 treesize of output 67 [2021-06-05 15:52:16,627 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:52:16,655 INFO L628 ElimStorePlain]: treesize reduction 36, result has 62.9 percent of original size [2021-06-05 15:52:16,658 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 1 xjuncts. [2021-06-05 15:52:16,659 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:79, output treesize:61 [2021-06-05 15:52:16,972 INFO L446 ElimStorePlain]: Different costs {3=[C], 10=[v_prenex_11]} [2021-06-05 15:52:16,988 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:52:16,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 12 treesize of output 31 [2021-06-05 15:52:16,993 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 15:52:17,063 INFO L628 ElimStorePlain]: treesize reduction 15, result has 88.2 percent of original size [2021-06-05 15:52:17,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:52:17,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:52:17,105 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:52:17,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 45 treesize of output 93