/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/horseshoe.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 05:29:57,272 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 05:29:57,274 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 05:29:57,292 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 05:29:57,322 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 05:29:57,338 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 05:29:57,339 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 05:29:57,339 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 05:29:57,339 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 05:29:57,339 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 05:29:57,340 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 05:29:57,340 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 05:29:57,340 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 05:29:57,340 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 05:29:57,340 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 05:29:57,340 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 05:29:57,340 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 05:29:57,340 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 05:29:57,340 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 05:29:57,340 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 05:29:57,340 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 05:29:57,341 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 05:29:57,341 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 05:29:57,341 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 05:29:57,341 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 05:29:57,341 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 05:29:57,341 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 05:29:57,341 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 05:29:57,341 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 05:29:57,341 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 05:29:57,341 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 05:29:57,341 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 05:29:57,342 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 05:29:57,342 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 05:29:57,342 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 05:29:57,342 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 05:29:57,342 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 05:29:57,565 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 05:29:57,578 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 05:29:57,580 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 05:29:57,581 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 05:29:57,582 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 05:29:57,582 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/horseshoe.wvr.bpl [2021-06-05 05:29:57,582 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/horseshoe.wvr.bpl' [2021-06-05 05:29:57,614 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 05:29:57,615 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 05:29:57,616 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 05:29:57,616 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 05:29:57,616 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 05:29:57,629 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:29:57" (1/1) ... [2021-06-05 05:29:57,634 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:29:57" (1/1) ... [2021-06-05 05:29:57,639 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 05:29:57,640 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 05:29:57,640 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 05:29:57,640 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 05:29:57,645 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:29:57" (1/1) ... [2021-06-05 05:29:57,646 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:29:57" (1/1) ... [2021-06-05 05:29:57,646 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:29:57" (1/1) ... [2021-06-05 05:29:57,647 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:29:57" (1/1) ... [2021-06-05 05:29:57,648 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:29:57" (1/1) ... [2021-06-05 05:29:57,651 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:29:57" (1/1) ... [2021-06-05 05:29:57,651 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:29:57" (1/1) ... [2021-06-05 05:29:57,652 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 05:29:57,652 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 05:29:57,653 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 05:29:57,653 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 05:29:57,653 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:29:57" (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 05:29:57,705 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 05:29:57,705 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 05:29:57,706 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 05:29:57,706 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 05:29:57,706 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 05:29:57,706 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 05:29:57,706 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 05:29:57,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 05:29:57,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 05:29:57,706 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 05:29:57,706 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 05:29:57,707 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 05:29:57,707 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 05:29:57,885 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 05:29:57,886 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 05:29:57,887 INFO L202 PluginConnector]: Adding new model horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:29:57 BoogieIcfgContainer [2021-06-05 05:29:57,887 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 05:29:57,888 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 05:29:57,888 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 05:29:57,890 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 05:29:57,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:29:57" (1/2) ... [2021-06-05 05:29:57,891 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@84bbf85 and model type horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 05:29:57, skipping insertion in model container [2021-06-05 05:29:57,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:29:57" (2/2) ... [2021-06-05 05:29:57,892 INFO L111 eAbstractionObserver]: Analyzing ICFG horseshoe.wvr.bpl [2021-06-05 05:29:57,895 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 05:29:57,895 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 05:29:57,896 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 05:29:57,896 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 05:29:57,954 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 05:29:57,967 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 05:29:57,980 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 05:29:57,980 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 05:29:57,980 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 05:29:57,980 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 05:29:57,980 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 05:29:57,980 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 05:29:57,980 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 05:29:57,980 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 05:29:57,986 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 40 places, 33 transitions, 90 flow [2021-06-05 05:29:58,014 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 355 states, 353 states have (on average 2.943342776203966) internal successors, (1039), 354 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:29:58,018 INFO L276 IsEmpty]: Start isEmpty. Operand has 355 states, 353 states have (on average 2.943342776203966) internal successors, (1039), 354 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:29:58,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 05:29:58,038 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:29:58,038 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:29:58,039 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:29:58,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:29:58,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1822169931, now seen corresponding path program 1 times [2021-06-05 05:29:58,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:29:58,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254391104] [2021-06-05 05:29:58,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:29:58,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:29:58,133 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 05:29:58,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:29:58,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254391104] [2021-06-05 05:29:58,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254391104] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:29:58,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:29:58,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 05:29:58,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221920802] [2021-06-05 05:29:58,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 05:29:58,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:29:58,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 05:29:58,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:29:58,148 INFO L87 Difference]: Start difference. First operand has 355 states, 353 states have (on average 2.943342776203966) internal successors, (1039), 354 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 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 05:29:58,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:29:58,171 INFO L93 Difference]: Finished difference Result 401 states and 1181 transitions. [2021-06-05 05:29:58,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 05:29:58,172 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 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 05:29:58,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:29:58,182 INFO L225 Difference]: With dead ends: 401 [2021-06-05 05:29:58,182 INFO L226 Difference]: Without dead ends: 401 [2021-06-05 05:29:58,183 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:29:58,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-06-05 05:29:58,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 401. [2021-06-05 05:29:58,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.9525) internal successors, (1181), 400 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:29:58,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1181 transitions. [2021-06-05 05:29:58,229 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1181 transitions. Word has length 16 [2021-06-05 05:29:58,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:29:58,229 INFO L482 AbstractCegarLoop]: Abstraction has 401 states and 1181 transitions. [2021-06-05 05:29:58,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 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 05:29:58,230 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1181 transitions. [2021-06-05 05:29:58,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 05:29:58,231 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:29:58,232 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 05:29:58,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 05:29:58,232 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:29:58,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:29:58,233 INFO L82 PathProgramCache]: Analyzing trace with hash -2093701423, now seen corresponding path program 1 times [2021-06-05 05:29:58,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:29:58,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592059397] [2021-06-05 05:29:58,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:29:58,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:29:58,260 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 05:29:58,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:29:58,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592059397] [2021-06-05 05:29:58,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592059397] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:29:58,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:29:58,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 05:29:58,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360890822] [2021-06-05 05:29:58,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 05:29:58,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:29:58,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 05:29:58,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:29:58,265 INFO L87 Difference]: Start difference. First operand 401 states and 1181 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:29:58,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:29:58,283 INFO L93 Difference]: Finished difference Result 458 states and 1351 transitions. [2021-06-05 05:29:58,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 05:29:58,284 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have 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 05:29:58,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:29:58,288 INFO L225 Difference]: With dead ends: 458 [2021-06-05 05:29:58,288 INFO L226 Difference]: Without dead ends: 458 [2021-06-05 05:29:58,289 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:29:58,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-06-05 05:29:58,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 458. [2021-06-05 05:29:58,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 2.9562363238512037) internal successors, (1351), 457 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:29:58,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1351 transitions. [2021-06-05 05:29:58,321 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1351 transitions. Word has length 21 [2021-06-05 05:29:58,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:29:58,321 INFO L482 AbstractCegarLoop]: Abstraction has 458 states and 1351 transitions. [2021-06-05 05:29:58,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:29:58,322 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1351 transitions. [2021-06-05 05:29:58,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:29:58,323 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:29:58,323 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, 1, 1] [2021-06-05 05:29:58,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 05:29:58,323 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:29:58,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:29:58,324 INFO L82 PathProgramCache]: Analyzing trace with hash 412173230, now seen corresponding path program 1 times [2021-06-05 05:29:58,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:29:58,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312249473] [2021-06-05 05:29:58,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:29:58,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:29:58,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:29:58,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:29:58,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312249473] [2021-06-05 05:29:58,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312249473] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:29:58,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:29:58,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 05:29:58,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023854879] [2021-06-05 05:29:58,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 05:29:58,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:29:58,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 05:29:58,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:29:58,393 INFO L87 Difference]: Start difference. First operand 458 states and 1351 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:29:58,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:29:58,405 INFO L93 Difference]: Finished difference Result 463 states and 1345 transitions. [2021-06-05 05:29:58,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 05:29:58,407 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 05:29:58,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:29:58,409 INFO L225 Difference]: With dead ends: 463 [2021-06-05 05:29:58,409 INFO L226 Difference]: Without dead ends: 463 [2021-06-05 05:29:58,409 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:29:58,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-06-05 05:29:58,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 463. [2021-06-05 05:29:58,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 2.911255411255411) internal successors, (1345), 462 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:29:58,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1345 transitions. [2021-06-05 05:29:58,424 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1345 transitions. Word has length 25 [2021-06-05 05:29:58,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:29:58,424 INFO L482 AbstractCegarLoop]: Abstraction has 463 states and 1345 transitions. [2021-06-05 05:29:58,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:29:58,424 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1345 transitions. [2021-06-05 05:29:58,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:29:58,426 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:29:58,426 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, 1, 1] [2021-06-05 05:29:58,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 05:29:58,426 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:29:58,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:29:58,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1863818432, now seen corresponding path program 2 times [2021-06-05 05:29:58,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:29:58,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252899498] [2021-06-05 05:29:58,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:29:58,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:29:58,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:29:58,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:29:58,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252899498] [2021-06-05 05:29:58,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252899498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:29:58,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943636654] [2021-06-05 05:29:58,740 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 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 05:29:58,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:29:58,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:29:58,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 05:29:58,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:29:58,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:29:58,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:29:58,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:29:58,972 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 05:29:58,972 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:29:59,024 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 05:29:59,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:29:59,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:29:59,034 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 05:29:59,034 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:15 [2021-06-05 05:29:59,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:29:59,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943636654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:29:59,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:29:59,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 21 [2021-06-05 05:29:59,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950981421] [2021-06-05 05:29:59,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:29:59,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:29:59,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:29:59,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:29:59,195 INFO L87 Difference]: Start difference. First operand 463 states and 1345 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 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 05:29:59,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:29:59,974 INFO L93 Difference]: Finished difference Result 1470 states and 4324 transitions. [2021-06-05 05:29:59,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:29:59,974 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 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 25 [2021-06-05 05:29:59,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:29:59,979 INFO L225 Difference]: With dead ends: 1470 [2021-06-05 05:29:59,980 INFO L226 Difference]: Without dead ends: 1408 [2021-06-05 05:29:59,980 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 767.8ms TimeCoverageRelationStatistics Valid=202, Invalid=1280, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:29:59,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1408 states. [2021-06-05 05:29:59,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1408 to 637. [2021-06-05 05:29:59,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 2.9276729559748427) internal successors, (1862), 636 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:29:59,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1862 transitions. [2021-06-05 05:29:59,997 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1862 transitions. Word has length 25 [2021-06-05 05:29:59,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:29:59,998 INFO L482 AbstractCegarLoop]: Abstraction has 637 states and 1862 transitions. [2021-06-05 05:29:59,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 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 05:29:59,998 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1862 transitions. [2021-06-05 05:29:59,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:29:59,999 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:29:59,999 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, 1, 1] [2021-06-05 05:30:00,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:30:00,220 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:30:00,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:30:00,221 INFO L82 PathProgramCache]: Analyzing trace with hash -734842624, now seen corresponding path program 3 times [2021-06-05 05:30:00,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:30:00,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35450172] [2021-06-05 05:30:00,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:30:00,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:30:00,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:30:00,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:30:00,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35450172] [2021-06-05 05:30:00,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35450172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:30:00,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733454373] [2021-06-05 05:30:00,353 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 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 05:30:00,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:30:00,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:30:00,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 05:30:00,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:30:00,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:30:00,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:30:00,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:30:00,458 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 05:30:00,458 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:30:00,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 05:30:00,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:30:00,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:30:00,508 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 05:30:00,508 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:15 [2021-06-05 05:30:00,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:30:00,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733454373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:30:00,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:30:00,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:30:00,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206492417] [2021-06-05 05:30:00,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:30:00,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:30:00,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:30:00,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:30:00,664 INFO L87 Difference]: Start difference. First operand 637 states and 1862 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 05:30:01,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:30:01,378 INFO L93 Difference]: Finished difference Result 1386 states and 3964 transitions. [2021-06-05 05:30:01,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:30:01,379 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 25 [2021-06-05 05:30:01,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:30:01,384 INFO L225 Difference]: With dead ends: 1386 [2021-06-05 05:30:01,384 INFO L226 Difference]: Without dead ends: 1334 [2021-06-05 05:30:01,384 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 411.8ms TimeCoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:30:01,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1334 states. [2021-06-05 05:30:01,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1334 to 755. [2021-06-05 05:30:01,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 754 states have (on average 2.8779840848806364) internal successors, (2170), 754 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:30:01,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 2170 transitions. [2021-06-05 05:30:01,403 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 2170 transitions. Word has length 25 [2021-06-05 05:30:01,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:30:01,403 INFO L482 AbstractCegarLoop]: Abstraction has 755 states and 2170 transitions. [2021-06-05 05:30:01,403 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 05:30:01,403 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 2170 transitions. [2021-06-05 05:30:01,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 05:30:01,405 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:30:01,405 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, 1, 1, 1, 1, 1] [2021-06-05 05:30:01,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:30:01,621 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:30:01,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:30:01,621 INFO L82 PathProgramCache]: Analyzing trace with hash -641687495, now seen corresponding path program 1 times [2021-06-05 05:30:01,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:30:01,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173575707] [2021-06-05 05:30:01,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:30:01,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:30:01,655 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 05:30:01,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:30:01,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173575707] [2021-06-05 05:30:01,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173575707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:30:01,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26985892] [2021-06-05 05:30:01,655 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) [2021-06-05 05:30:01,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:30:01,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:30:01,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:30:01,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:30:01,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:30:01,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:30:01,737 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 05:30:01,738 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 05:30:01,758 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 05:30:01,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26985892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:30:01,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:30:01,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 05:30:01,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037065228] [2021-06-05 05:30:01,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 05:30:01,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:30:01,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 05:30:01,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:30:01,759 INFO L87 Difference]: Start difference. First operand 755 states and 2170 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 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 05:30:01,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:30:01,803 INFO L93 Difference]: Finished difference Result 972 states and 2800 transitions. [2021-06-05 05:30:01,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 05:30:01,803 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 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 28 [2021-06-05 05:30:01,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:30:01,809 INFO L225 Difference]: With dead ends: 972 [2021-06-05 05:30:01,810 INFO L226 Difference]: Without dead ends: 972 [2021-06-05 05:30:01,811 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 30.2ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:30:01,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972 states. [2021-06-05 05:30:01,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972 to 773. [2021-06-05 05:30:01,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 772 states have (on average 2.873056994818653) internal successors, (2218), 772 states have internal predecessors, (2218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:30:01,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 2218 transitions. [2021-06-05 05:30:01,826 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 2218 transitions. Word has length 28 [2021-06-05 05:30:01,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:30:01,826 INFO L482 AbstractCegarLoop]: Abstraction has 773 states and 2218 transitions. [2021-06-05 05:30:01,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 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 05:30:01,826 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 2218 transitions. [2021-06-05 05:30:01,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:30:01,828 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:30:01,828 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 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 05:30:02,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:30:02,044 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:30:02,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:30:02,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1280680323, now seen corresponding path program 4 times [2021-06-05 05:30:02,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:30:02,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116809529] [2021-06-05 05:30:02,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:30:02,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:30:02,089 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:30:02,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:30:02,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116809529] [2021-06-05 05:30:02,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116809529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:30:02,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616948083] [2021-06-05 05:30:02,090 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 05:30:02,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:30:02,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:30:02,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 05:30:02,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:30:02,309 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:30:02,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616948083] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:30:02,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 05:30:02,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-06-05 05:30:02,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210206382] [2021-06-05 05:30:02,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 05:30:02,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:30:02,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 05:30:02,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:30:02,310 INFO L87 Difference]: Start difference. First operand 773 states and 2218 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:30:02,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:30:02,322 INFO L93 Difference]: Finished difference Result 1430 states and 4086 transitions. [2021-06-05 05:30:02,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 05:30:02,323 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:30:02,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:30:02,327 INFO L225 Difference]: With dead ends: 1430 [2021-06-05 05:30:02,327 INFO L226 Difference]: Without dead ends: 1364 [2021-06-05 05:30:02,327 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 29.5ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:30:02,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1364 states. [2021-06-05 05:30:02,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1364 to 1108. [2021-06-05 05:30:02,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1108 states, 1107 states have (on average 2.962962962962963) internal successors, (3280), 1107 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:30:02,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1108 states to 1108 states and 3280 transitions. [2021-06-05 05:30:02,349 INFO L78 Accepts]: Start accepts. Automaton has 1108 states and 3280 transitions. Word has length 29 [2021-06-05 05:30:02,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:30:02,349 INFO L482 AbstractCegarLoop]: Abstraction has 1108 states and 3280 transitions. [2021-06-05 05:30:02,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:30:02,349 INFO L276 IsEmpty]: Start isEmpty. Operand 1108 states and 3280 transitions. [2021-06-05 05:30:02,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:30:02,351 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:30:02,351 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, 1, 1] [2021-06-05 05:30:02,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:30:02,565 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:30:02,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:30:02,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1936406216, now seen corresponding path program 5 times [2021-06-05 05:30:02,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:30:02,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057111526] [2021-06-05 05:30:02,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:30:02,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:30:02,592 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:30:02,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:30:02,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057111526] [2021-06-05 05:30:02,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057111526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:30:02,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298495099] [2021-06-05 05:30:02,592 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 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 05:30:02,651 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:30:02,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:30:02,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 05:30:02,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:30:02,701 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:30:02,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298495099] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:30:02,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 05:30:02,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-06-05 05:30:02,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409787797] [2021-06-05 05:30:02,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 05:30:02,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:30:02,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 05:30:02,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:30:02,704 INFO L87 Difference]: Start difference. First operand 1108 states and 3280 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:30:02,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:30:02,736 INFO L93 Difference]: Finished difference Result 3088 states and 9151 transitions. [2021-06-05 05:30:02,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 05:30:02,736 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:30:02,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:30:02,747 INFO L225 Difference]: With dead ends: 3088 [2021-06-05 05:30:02,747 INFO L226 Difference]: Without dead ends: 2925 [2021-06-05 05:30:02,747 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 21.6ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:30:02,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2925 states. [2021-06-05 05:30:02,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2925 to 2475. [2021-06-05 05:30:02,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2475 states, 2474 states have (on average 3.0731608730800324) internal successors, (7603), 2474 states have internal predecessors, (7603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:30:02,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2475 states to 2475 states and 7603 transitions. [2021-06-05 05:30:02,808 INFO L78 Accepts]: Start accepts. Automaton has 2475 states and 7603 transitions. Word has length 30 [2021-06-05 05:30:02,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:30:02,808 INFO L482 AbstractCegarLoop]: Abstraction has 2475 states and 7603 transitions. [2021-06-05 05:30:02,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:30:02,808 INFO L276 IsEmpty]: Start isEmpty. Operand 2475 states and 7603 transitions. [2021-06-05 05:30:02,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:30:02,812 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:30:02,812 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, 1, 1, 1, 1, 1] [2021-06-05 05:30:03,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:30:03,027 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:30:03,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:30:03,027 INFO L82 PathProgramCache]: Analyzing trace with hash 2026861479, now seen corresponding path program 2 times [2021-06-05 05:30:03,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:30:03,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839870591] [2021-06-05 05:30:03,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:30:03,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:30:03,080 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:30:03,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:30:03,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839870591] [2021-06-05 05:30:03,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839870591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:30:03,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639317342] [2021-06-05 05:30:03,080 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 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 05:30:03,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:30:03,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:30:03,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 05:30:03,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:30:03,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:30:03,139 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:30:03,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:30:03,149 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 05:30:03,149 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:7 [2021-06-05 05:30:03,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:30:03,178 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:30:03,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:30:03,179 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 05:30:03,179 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 05:30:03,220 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:30:03,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639317342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:30:03,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:30:03,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 05:30:03,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680682869] [2021-06-05 05:30:03,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:30:03,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:30:03,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:30:03,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:30:03,222 INFO L87 Difference]: Start difference. First operand 2475 states and 7603 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:30:03,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:30:03,390 INFO L93 Difference]: Finished difference Result 3669 states and 11137 transitions. [2021-06-05 05:30:03,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 05:30:03,390 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:30:03,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:30:03,404 INFO L225 Difference]: With dead ends: 3669 [2021-06-05 05:30:03,404 INFO L226 Difference]: Without dead ends: 3669 [2021-06-05 05:30:03,404 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 118.2ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:30:03,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3669 states. [2021-06-05 05:30:03,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3669 to 3342. [2021-06-05 05:30:03,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3342 states, 3341 states have (on average 3.0634540556719547) internal successors, (10235), 3341 states have internal predecessors, (10235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:30:03,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3342 states to 3342 states and 10235 transitions. [2021-06-05 05:30:03,479 INFO L78 Accepts]: Start accepts. Automaton has 3342 states and 10235 transitions. Word has length 33 [2021-06-05 05:30:03,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:30:03,479 INFO L482 AbstractCegarLoop]: Abstraction has 3342 states and 10235 transitions. [2021-06-05 05:30:03,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:30:03,479 INFO L276 IsEmpty]: Start isEmpty. Operand 3342 states and 10235 transitions. [2021-06-05 05:30:03,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:30:03,485 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:30:03,485 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:30:03,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:30:03,701 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:30:03,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:30:03,701 INFO L82 PathProgramCache]: Analyzing trace with hash -905518150, now seen corresponding path program 3 times [2021-06-05 05:30:03,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:30:03,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893527666] [2021-06-05 05:30:03,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:30:03,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:30:04,174 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:30:04,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:30:04,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893527666] [2021-06-05 05:30:04,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893527666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:30:04,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134067148] [2021-06-05 05:30:04,175 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 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 05:30:04,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:30:04,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:30:04,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 05:30:04,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:30:04,729 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:30:04,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 05:30:04,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:30:04,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:30:04,743 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 05:30:04,743 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:37 [2021-06-05 05:30:04,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:30:04,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:30:04,873 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 43 treesize of output 23 [2021-06-05 05:30:04,875 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:30:04,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:30:04,891 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 05:30:04,891 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:54, output treesize:20 [2021-06-05 05:30:05,137 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:30:05,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134067148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:30:05,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:30:05,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 37 [2021-06-05 05:30:05,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017697858] [2021-06-05 05:30:05,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:30:05,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:30:05,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:30:05,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1309, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:30:05,138 INFO L87 Difference]: Start difference. First operand 3342 states and 10235 transitions. Second operand has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 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 05:30:08,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:30:08,519 INFO L93 Difference]: Finished difference Result 6187 states and 18347 transitions. [2021-06-05 05:30:08,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 05:30:08,519 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 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 05:30:08,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:30:08,539 INFO L225 Difference]: With dead ends: 6187 [2021-06-05 05:30:08,539 INFO L226 Difference]: Without dead ends: 5968 [2021-06-05 05:30:08,540 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1301 ImplicationChecksByTransitivity, 2845.0ms TimeCoverageRelationStatistics Valid=513, Invalid=5649, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 05:30:08,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5968 states. [2021-06-05 05:30:08,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5968 to 4135. [2021-06-05 05:30:08,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4135 states, 4134 states have (on average 3.0246734397677795) internal successors, (12504), 4134 states have internal predecessors, (12504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:30:08,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4135 states to 4135 states and 12504 transitions. [2021-06-05 05:30:08,637 INFO L78 Accepts]: Start accepts. Automaton has 4135 states and 12504 transitions. Word has length 37 [2021-06-05 05:30:08,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:30:08,637 INFO L482 AbstractCegarLoop]: Abstraction has 4135 states and 12504 transitions. [2021-06-05 05:30:08,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 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 05:30:08,637 INFO L276 IsEmpty]: Start isEmpty. Operand 4135 states and 12504 transitions. [2021-06-05 05:30:08,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:30:08,644 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:30:08,644 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:30:08,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 05:30:08,857 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:30:08,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:30:08,857 INFO L82 PathProgramCache]: Analyzing trace with hash 790788090, now seen corresponding path program 4 times [2021-06-05 05:30:08,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:30:08,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624027268] [2021-06-05 05:30:08,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:30:08,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:30:09,207 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:30:09,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:30:09,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624027268] [2021-06-05 05:30:09,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624027268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:30:09,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158278193] [2021-06-05 05:30:09,208 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 05:30:09,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:30:09,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:30:09,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:30:09,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:30:09,613 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:30:09,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 05:30:09,615 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:30:09,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:30:09,621 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 05:30:09,621 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 05:30:09,702 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:30:09,702 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 29 treesize of output 17 [2021-06-05 05:30:09,704 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:30:09,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:30:09,710 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 05:30:09,710 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:30:09,956 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:30:09,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158278193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:30:09,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:30:09,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2021-06-05 05:30:09,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610185281] [2021-06-05 05:30:09,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:30:09,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:30:09,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:30:09,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1178, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:30:09,957 INFO L87 Difference]: Start difference. First operand 4135 states and 12504 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 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 05:30:12,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:30:12,434 INFO L93 Difference]: Finished difference Result 4979 states and 14733 transitions. [2021-06-05 05:30:12,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 05:30:12,434 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 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 05:30:12,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:30:12,446 INFO L225 Difference]: With dead ends: 4979 [2021-06-05 05:30:12,446 INFO L226 Difference]: Without dead ends: 4828 [2021-06-05 05:30:12,447 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 1605.0ms TimeCoverageRelationStatistics Valid=206, Invalid=2986, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 05:30:12,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4828 states. [2021-06-05 05:30:12,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4828 to 4306. [2021-06-05 05:30:12,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4306 states, 4305 states have (on average 3.0011614401858306) internal successors, (12920), 4305 states have internal predecessors, (12920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:30:12,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4306 states to 4306 states and 12920 transitions. [2021-06-05 05:30:12,614 INFO L78 Accepts]: Start accepts. Automaton has 4306 states and 12920 transitions. Word has length 37 [2021-06-05 05:30:12,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:30:12,614 INFO L482 AbstractCegarLoop]: Abstraction has 4306 states and 12920 transitions. [2021-06-05 05:30:12,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 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 05:30:12,615 INFO L276 IsEmpty]: Start isEmpty. Operand 4306 states and 12920 transitions. [2021-06-05 05:30:12,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:30:12,635 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:30:12,635 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:30:12,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-06-05 05:30:12,849 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:30:12,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:30:12,849 INFO L82 PathProgramCache]: Analyzing trace with hash 608631128, now seen corresponding path program 5 times [2021-06-05 05:30:12,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:30:12,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280730005] [2021-06-05 05:30:12,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:30:12,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:30:13,266 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:30:13,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:30:13,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280730005] [2021-06-05 05:30:13,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280730005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:30:13,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467949111] [2021-06-05 05:30:13,266 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 05:30:13,303 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:30:13,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:30:13,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 05:30:13,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:30:13,690 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:30:13,691 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 25 treesize of output 13 [2021-06-05 05:30:13,693 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:30:13,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:30:13,700 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 05:30:13,701 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 05:30:13,780 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:30:13,780 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 29 treesize of output 17 [2021-06-05 05:30:13,790 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:30:13,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:30:13,796 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 05:30:13,796 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:30:14,056 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:30:14,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467949111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:30:14,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:30:14,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:30:14,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640919280] [2021-06-05 05:30:14,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:30:14,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:30:14,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:30:14,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1234, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:30:14,058 INFO L87 Difference]: Start difference. First operand 4306 states and 12920 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:30:17,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:30:17,153 INFO L93 Difference]: Finished difference Result 7343 states and 21553 transitions. [2021-06-05 05:30:17,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 05:30:17,153 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:30:17,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:30:17,167 INFO L225 Difference]: With dead ends: 7343 [2021-06-05 05:30:17,167 INFO L226 Difference]: Without dead ends: 7124 [2021-06-05 05:30:17,168 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1380 ImplicationChecksByTransitivity, 2538.9ms TimeCoverageRelationStatistics Valid=551, Invalid=5611, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 05:30:17,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7124 states. [2021-06-05 05:30:17,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7124 to 4369. [2021-06-05 05:30:17,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4369 states, 4368 states have (on average 3.001144688644689) internal successors, (13109), 4368 states have internal predecessors, (13109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:30:17,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4369 states to 4369 states and 13109 transitions. [2021-06-05 05:30:17,261 INFO L78 Accepts]: Start accepts. Automaton has 4369 states and 13109 transitions. Word has length 37 [2021-06-05 05:30:17,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:30:17,262 INFO L482 AbstractCegarLoop]: Abstraction has 4369 states and 13109 transitions. [2021-06-05 05:30:17,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:30:17,262 INFO L276 IsEmpty]: Start isEmpty. Operand 4369 states and 13109 transitions. [2021-06-05 05:30:17,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:30:17,268 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:30:17,268 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:30:17,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:30:17,485 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:30:17,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:30:17,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1990029928, now seen corresponding path program 6 times [2021-06-05 05:30:17,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:30:17,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417922349] [2021-06-05 05:30:17,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:30:17,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:30:17,804 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:30:17,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:30:17,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417922349] [2021-06-05 05:30:17,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417922349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:30:17,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409893308] [2021-06-05 05:30:17,804 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 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 05:30:17,858 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:30:17,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:30:17,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:30:17,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:30:18,153 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:30:18,153 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 25 treesize of output 13 [2021-06-05 05:30:18,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:30:18,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:30:18,161 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 05:30:18,161 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 05:30:18,227 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:30:18,227 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 29 treesize of output 17 [2021-06-05 05:30:18,229 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:30:18,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:30:18,234 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 05:30:18,234 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:30:18,350 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:30:18,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409893308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:30:18,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:30:18,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 05:30:18,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609501388] [2021-06-05 05:30:18,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 05:30:18,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:30:18,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 05:30:18,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=972, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:30:18,351 INFO L87 Difference]: Start difference. First operand 4369 states and 13109 transitions. Second operand has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 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 05:30:19,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:30:19,203 INFO L93 Difference]: Finished difference Result 4696 states and 13935 transitions. [2021-06-05 05:30:19,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:30:19,203 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 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 05:30:19,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:30:19,211 INFO L225 Difference]: With dead ends: 4696 [2021-06-05 05:30:19,211 INFO L226 Difference]: Without dead ends: 4639 [2021-06-05 05:30:19,211 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 947.7ms TimeCoverageRelationStatistics Valid=153, Invalid=1739, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:30:19,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4639 states. [2021-06-05 05:30:19,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4639 to 4432. [2021-06-05 05:30:19,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4432 states, 4431 states have (on average 2.993680884676145) internal successors, (13265), 4431 states have internal predecessors, (13265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:30:19,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4432 states to 4432 states and 13265 transitions. [2021-06-05 05:30:19,284 INFO L78 Accepts]: Start accepts. Automaton has 4432 states and 13265 transitions. Word has length 37 [2021-06-05 05:30:19,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:30:19,285 INFO L482 AbstractCegarLoop]: Abstraction has 4432 states and 13265 transitions. [2021-06-05 05:30:19,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 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 05:30:19,285 INFO L276 IsEmpty]: Start isEmpty. Operand 4432 states and 13265 transitions. [2021-06-05 05:30:19,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:30:19,292 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:30:19,292 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:30:19,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 05:30:19,505 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:30:19,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:30:19,506 INFO L82 PathProgramCache]: Analyzing trace with hash 179870100, now seen corresponding path program 7 times [2021-06-05 05:30:19,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:30:19,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570326893] [2021-06-05 05:30:19,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:30:19,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:30:19,908 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:30:19,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:30:19,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570326893] [2021-06-05 05:30:19,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570326893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:30:19,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047099916] [2021-06-05 05:30:19,909 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 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 05:30:19,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:30:19,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:30:19,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:30:20,183 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:30:20,184 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 31 treesize of output 15 [2021-06-05 05:30:20,185 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:30:20,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:30:20,192 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 05:30:20,192 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:32 [2021-06-05 05:30:20,390 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:30:20,390 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 29 treesize of output 17 [2021-06-05 05:30:20,391 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:30:20,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:30:20,397 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 05:30:20,397 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:30:20,599 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:30:20,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047099916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:30:20,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:30:20,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 05:30:20,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332264556] [2021-06-05 05:30:20,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:30:20,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:30:20,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:30:20,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1381, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:30:20,601 INFO L87 Difference]: Start difference. First operand 4432 states and 13265 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:30:23,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:30:23,705 INFO L93 Difference]: Finished difference Result 8013 states and 23476 transitions. [2021-06-05 05:30:23,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 05:30:23,706 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:30:23,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:30:23,718 INFO L225 Difference]: With dead ends: 8013 [2021-06-05 05:30:23,718 INFO L226 Difference]: Without dead ends: 7794 [2021-06-05 05:30:23,720 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1961 ImplicationChecksByTransitivity, 2761.7ms TimeCoverageRelationStatistics Valid=659, Invalid=7173, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 05:30:23,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7794 states. [2021-06-05 05:30:23,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7794 to 4516. [2021-06-05 05:30:23,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4516 states, 4515 states have (on average 2.9937984496124033) internal successors, (13517), 4515 states have internal predecessors, (13517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:30:23,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4516 states to 4516 states and 13517 transitions. [2021-06-05 05:30:23,811 INFO L78 Accepts]: Start accepts. Automaton has 4516 states and 13517 transitions. Word has length 37 [2021-06-05 05:30:23,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:30:23,811 INFO L482 AbstractCegarLoop]: Abstraction has 4516 states and 13517 transitions. [2021-06-05 05:30:23,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:30:23,811 INFO L276 IsEmpty]: Start isEmpty. Operand 4516 states and 13517 transitions. [2021-06-05 05:30:23,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:30:23,818 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:30:23,818 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:30:24,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 05:30:24,033 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:30:24,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:30:24,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1876176340, now seen corresponding path program 8 times [2021-06-05 05:30:24,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:30:24,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008452762] [2021-06-05 05:30:24,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:30:24,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:30:24,421 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:30:24,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:30:24,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008452762] [2021-06-05 05:30:24,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008452762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:30:24,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969462866] [2021-06-05 05:30:24,421 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 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 05:30:24,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:30:24,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:30:24,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:30:24,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:30:24,681 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:30:24,681 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 27 treesize of output 15 [2021-06-05 05:30:24,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:30:24,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:30:24,705 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 05:30:24,705 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 05:30:24,897 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:30:24,897 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 29 treesize of output 17 [2021-06-05 05:30:24,899 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:30:24,904 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:30:24,904 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 05:30:24,905 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:30:25,118 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:30:25,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969462866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:30:25,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:30:25,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:30:25,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196753489] [2021-06-05 05:30:25,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:30:25,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:30:25,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:30:25,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1251, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:30:25,120 INFO L87 Difference]: Start difference. First operand 4516 states and 13517 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:30:27,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:30:27,440 INFO L93 Difference]: Finished difference Result 5240 states and 15444 transitions. [2021-06-05 05:30:27,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 05:30:27,440 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:30:27,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:30:27,446 INFO L225 Difference]: With dead ends: 5240 [2021-06-05 05:30:27,446 INFO L226 Difference]: Without dead ends: 5088 [2021-06-05 05:30:27,447 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 1747.9ms TimeCoverageRelationStatistics Valid=233, Invalid=3307, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 05:30:27,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5088 states. [2021-06-05 05:30:27,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5088 to 4471. [2021-06-05 05:30:27,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4471 states, 4470 states have (on average 2.9997762863534674) internal successors, (13409), 4470 states have internal predecessors, (13409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:30:27,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4471 states to 4471 states and 13409 transitions. [2021-06-05 05:30:27,524 INFO L78 Accepts]: Start accepts. Automaton has 4471 states and 13409 transitions. Word has length 37 [2021-06-05 05:30:27,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:30:27,524 INFO L482 AbstractCegarLoop]: Abstraction has 4471 states and 13409 transitions. [2021-06-05 05:30:27,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:30:27,524 INFO L276 IsEmpty]: Start isEmpty. Operand 4471 states and 13409 transitions. [2021-06-05 05:30:27,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:30:27,531 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:30:27,531 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:30:27,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:30:27,745 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:30:27,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:30:27,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1564493906, now seen corresponding path program 9 times [2021-06-05 05:30:27,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:30:27,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58098861] [2021-06-05 05:30:27,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:30:27,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:30:28,098 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:30:28,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:30:28,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58098861] [2021-06-05 05:30:28,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58098861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:30:28,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880858904] [2021-06-05 05:30:28,099 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 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 05:30:28,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:30:28,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:30:28,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:30:28,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:30:28,392 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:30:28,392 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 31 treesize of output 19 [2021-06-05 05:30:28,393 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:30:28,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:30:28,401 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 05:30:28,402 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:33 [2021-06-05 05:30:28,588 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:30:28,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 23 [2021-06-05 05:30:28,589 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:30:28,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:30:28,596 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 05:30:28,596 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:20 [2021-06-05 05:30:28,797 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:30:28,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880858904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:30:28,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:30:28,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 05:30:28,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010571743] [2021-06-05 05:30:28,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:30:28,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:30:28,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:30:28,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1381, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:30:28,798 INFO L87 Difference]: Start difference. First operand 4471 states and 13409 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:30:32,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:30:32,089 INFO L93 Difference]: Finished difference Result 8212 states and 24080 transitions. [2021-06-05 05:30:32,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 05:30:32,089 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:30:32,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:30:32,099 INFO L225 Difference]: With dead ends: 8212 [2021-06-05 05:30:32,099 INFO L226 Difference]: Without dead ends: 7993 [2021-06-05 05:30:32,101 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2042 ImplicationChecksByTransitivity, 2719.7ms TimeCoverageRelationStatistics Valid=633, Invalid=7377, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 05:30:32,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7993 states. [2021-06-05 05:30:32,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7993 to 4450. [2021-06-05 05:30:32,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4450 states, 4449 states have (on average 2.9997752303888516) internal successors, (13346), 4449 states have internal predecessors, (13346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:30:32,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4450 states to 4450 states and 13346 transitions. [2021-06-05 05:30:32,203 INFO L78 Accepts]: Start accepts. Automaton has 4450 states and 13346 transitions. Word has length 37 [2021-06-05 05:30:32,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:30:32,203 INFO L482 AbstractCegarLoop]: Abstraction has 4450 states and 13346 transitions. [2021-06-05 05:30:32,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:30:32,204 INFO L276 IsEmpty]: Start isEmpty. Operand 4450 states and 13346 transitions. [2021-06-05 05:30:32,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:30:32,210 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:30:32,210 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:30:32,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 05:30:32,426 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:30:32,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:30:32,426 INFO L82 PathProgramCache]: Analyzing trace with hash 131812334, now seen corresponding path program 10 times [2021-06-05 05:30:32,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:30:32,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019147578] [2021-06-05 05:30:32,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:30:32,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:30:32,747 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:30:32,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:30:32,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019147578] [2021-06-05 05:30:32,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019147578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:30:32,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523842961] [2021-06-05 05:30:32,747 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 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 05:30:32,782 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:30:32,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:30:32,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:30:32,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:30:33,032 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:30:33,033 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 29 treesize of output 13 [2021-06-05 05:30:33,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:30:33,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:30:33,041 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 05:30:33,041 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:29 [2021-06-05 05:30:33,221 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:30:33,221 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 29 treesize of output 17 [2021-06-05 05:30:33,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:30:33,229 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:30:33,230 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 05:30:33,230 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:30:33,463 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:30:33,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523842961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:30:33,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:30:33,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:30:33,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081125454] [2021-06-05 05:30:33,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:30:33,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:30:33,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:30:33,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1251, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:30:33,465 INFO L87 Difference]: Start difference. First operand 4450 states and 13346 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:30:35,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:30:35,964 INFO L93 Difference]: Finished difference Result 5299 states and 15633 transitions. [2021-06-05 05:30:35,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 05:30:35,964 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:30:35,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:30:35,971 INFO L225 Difference]: With dead ends: 5299 [2021-06-05 05:30:35,971 INFO L226 Difference]: Without dead ends: 5162 [2021-06-05 05:30:35,972 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 1709.1ms TimeCoverageRelationStatistics Valid=221, Invalid=3319, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 05:30:35,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5162 states. [2021-06-05 05:30:36,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5162 to 4460. [2021-06-05 05:30:36,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4460 states, 4459 states have (on average 2.999551468939224) internal successors, (13375), 4459 states have internal predecessors, (13375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:30:36,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4460 states to 4460 states and 13375 transitions. [2021-06-05 05:30:36,050 INFO L78 Accepts]: Start accepts. Automaton has 4460 states and 13375 transitions. Word has length 37 [2021-06-05 05:30:36,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:30:36,050 INFO L482 AbstractCegarLoop]: Abstraction has 4460 states and 13375 transitions. [2021-06-05 05:30:36,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:30:36,050 INFO L276 IsEmpty]: Start isEmpty. Operand 4460 states and 13375 transitions. [2021-06-05 05:30:36,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:30:36,057 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:30:36,057 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:30:36,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:30:36,276 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:30:36,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:30:36,276 INFO L82 PathProgramCache]: Analyzing trace with hash -2048900822, now seen corresponding path program 11 times [2021-06-05 05:30:36,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:30:36,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545408850] [2021-06-05 05:30:36,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:30:36,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:30:36,732 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:30:36,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:30:36,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545408850] [2021-06-05 05:30:36,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545408850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:30:36,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079168904] [2021-06-05 05:30:36,732 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 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 05:30:36,760 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:30:36,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:30:36,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:30:36,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:30:36,990 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:30:36,991 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 27 treesize of output 15 [2021-06-05 05:30:36,992 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:30:36,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:30:36,999 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 05:30:36,999 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 05:30:37,141 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:30:37,141 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 32 treesize of output 20 [2021-06-05 05:30:37,142 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:30:37,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:30:37,147 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 05:30:37,147 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:20 [2021-06-05 05:30:37,295 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:30:37,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079168904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:30:37,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:30:37,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-06-05 05:30:37,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301229848] [2021-06-05 05:30:37,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:30:37,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:30:37,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:30:37,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1108, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:30:37,297 INFO L87 Difference]: Start difference. First operand 4460 states and 13375 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 05:30:39,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:30:39,003 INFO L93 Difference]: Finished difference Result 5490 states and 16212 transitions. [2021-06-05 05:30:39,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:30:39,004 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 05:30:39,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:30:39,011 INFO L225 Difference]: With dead ends: 5490 [2021-06-05 05:30:39,011 INFO L226 Difference]: Without dead ends: 5339 [2021-06-05 05:30:39,012 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1231.7ms TimeCoverageRelationStatistics Valid=170, Invalid=2280, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 05:30:39,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5339 states. [2021-06-05 05:30:39,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5339 to 4543. [2021-06-05 05:30:39,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4543 states, 4542 states have (on average 2.997578159401145) internal successors, (13615), 4542 states have internal predecessors, (13615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:30:39,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4543 states to 4543 states and 13615 transitions. [2021-06-05 05:30:39,084 INFO L78 Accepts]: Start accepts. Automaton has 4543 states and 13615 transitions. Word has length 37 [2021-06-05 05:30:39,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:30:39,084 INFO L482 AbstractCegarLoop]: Abstraction has 4543 states and 13615 transitions. [2021-06-05 05:30:39,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 05:30:39,084 INFO L276 IsEmpty]: Start isEmpty. Operand 4543 states and 13615 transitions. [2021-06-05 05:30:39,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:30:39,091 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:30:39,091 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:30:39,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 05:30:39,305 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:30:39,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:30:39,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1695292094, now seen corresponding path program 12 times [2021-06-05 05:30:39,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:30:39,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560074667] [2021-06-05 05:30:39,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:30:39,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:30:39,664 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:30:39,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:30:39,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560074667] [2021-06-05 05:30:39,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560074667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:30:39,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227653256] [2021-06-05 05:30:39,664 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 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 05:30:39,698 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:30:39,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:30:39,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:30:39,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:30:39,963 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:30:39,964 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 25 treesize of output 13 [2021-06-05 05:30:39,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:30:39,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:30:39,972 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 05:30:39,972 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 05:30:40,144 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:30:40,145 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 29 treesize of output 17 [2021-06-05 05:30:40,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:30:40,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:30:40,152 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 05:30:40,152 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:30:40,263 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:30:40,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227653256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:30:40,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:30:40,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16] total 36 [2021-06-05 05:30:40,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563969036] [2021-06-05 05:30:40,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:30:40,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:30:40,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:30:40,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1234, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:30:40,264 INFO L87 Difference]: Start difference. First operand 4543 states and 13615 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:30:43,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:30:43,134 INFO L93 Difference]: Finished difference Result 7604 states and 22243 transitions. [2021-06-05 05:30:43,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 05:30:43,135 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:30:43,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:30:43,145 INFO L225 Difference]: With dead ends: 7604 [2021-06-05 05:30:43,145 INFO L226 Difference]: Without dead ends: 7478 [2021-06-05 05:30:43,146 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1685 ImplicationChecksByTransitivity, 2140.4ms TimeCoverageRelationStatistics Valid=521, Invalid=6285, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 05:30:43,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7478 states. [2021-06-05 05:30:43,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7478 to 4507. [2021-06-05 05:30:43,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4507 states, 4506 states have (on average 2.9986684420772303) internal successors, (13512), 4506 states have internal predecessors, (13512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:30:43,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4507 states to 4507 states and 13512 transitions. [2021-06-05 05:30:43,226 INFO L78 Accepts]: Start accepts. Automaton has 4507 states and 13512 transitions. Word has length 37 [2021-06-05 05:30:43,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:30:43,226 INFO L482 AbstractCegarLoop]: Abstraction has 4507 states and 13512 transitions. [2021-06-05 05:30:43,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:30:43,226 INFO L276 IsEmpty]: Start isEmpty. Operand 4507 states and 13512 transitions. [2021-06-05 05:30:43,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:30:43,233 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:30:43,233 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:30:43,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:30:43,449 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:30:43,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:30:43,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1533286864, now seen corresponding path program 13 times [2021-06-05 05:30:43,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:30:43,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960846238] [2021-06-05 05:30:43,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:30:43,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:30:43,802 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:30:43,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:30:43,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960846238] [2021-06-05 05:30:43,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960846238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:30:43,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832637541] [2021-06-05 05:30:43,802 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 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 05:30:43,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:30:43,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:30:43,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:30:44,060 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:30:44,060 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 29 treesize of output 13 [2021-06-05 05:30:44,062 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:30:44,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:30:44,069 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 05:30:44,069 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:29 [2021-06-05 05:30:44,275 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:30:44,275 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 29 treesize of output 17 [2021-06-05 05:30:44,276 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:30:44,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:30:44,282 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 05:30:44,282 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:30:44,486 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:30:44,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832637541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:30:44,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:30:44,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 05:30:44,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528721590] [2021-06-05 05:30:44,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:30:44,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:30:44,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:30:44,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1382, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:30:44,488 INFO L87 Difference]: Start difference. First operand 4507 states and 13512 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:30:47,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:30:47,194 INFO L93 Difference]: Finished difference Result 7935 states and 23388 transitions. [2021-06-05 05:30:47,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 05:30:47,195 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:30:47,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:30:47,207 INFO L225 Difference]: With dead ends: 7935 [2021-06-05 05:30:47,207 INFO L226 Difference]: Without dead ends: 7692 [2021-06-05 05:30:47,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1427 ImplicationChecksByTransitivity, 2185.3ms TimeCoverageRelationStatistics Valid=464, Invalid=5698, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 05:30:47,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7692 states. [2021-06-05 05:30:47,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7692 to 4612. [2021-06-05 05:30:47,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4612 states, 4611 states have (on average 2.9980481457384514) internal successors, (13824), 4611 states have internal predecessors, (13824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:30:47,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4612 states to 4612 states and 13824 transitions. [2021-06-05 05:30:47,326 INFO L78 Accepts]: Start accepts. Automaton has 4612 states and 13824 transitions. Word has length 37 [2021-06-05 05:30:47,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:30:47,327 INFO L482 AbstractCegarLoop]: Abstraction has 4612 states and 13824 transitions. [2021-06-05 05:30:47,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:30:47,327 INFO L276 IsEmpty]: Start isEmpty. Operand 4612 states and 13824 transitions. [2021-06-05 05:30:47,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:30:47,333 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:30:47,334 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:30:47,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 05:30:47,545 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:30:47,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:30:47,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1065374192, now seen corresponding path program 14 times [2021-06-05 05:30:47,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:30:47,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021424981] [2021-06-05 05:30:47,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:30:47,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:30:47,842 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:30:47,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:30:47,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021424981] [2021-06-05 05:30:47,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021424981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:30:47,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344787382] [2021-06-05 05:30:47,842 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 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 05:30:47,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:30:47,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:30:47,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:30:47,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:30:48,088 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:30:48,089 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 27 treesize of output 15 [2021-06-05 05:30:48,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:30:48,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:30:48,097 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 05:30:48,097 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 05:30:48,274 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:30:48,274 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 29 treesize of output 17 [2021-06-05 05:30:48,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:30:48,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:30:48,281 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 05:30:48,281 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:30:48,503 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:30:48,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344787382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:30:48,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:30:48,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:30:48,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303923548] [2021-06-05 05:30:48,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:30:48,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:30:48,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:30:48,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1251, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:30:48,505 INFO L87 Difference]: Start difference. First operand 4612 states and 13824 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:30:50,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:30:50,915 INFO L93 Difference]: Finished difference Result 5436 states and 16069 transitions. [2021-06-05 05:30:50,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 05:30:50,916 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:30:50,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:30:50,922 INFO L225 Difference]: With dead ends: 5436 [2021-06-05 05:30:50,922 INFO L226 Difference]: Without dead ends: 5299 [2021-06-05 05:30:50,923 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 1604.3ms TimeCoverageRelationStatistics Valid=217, Invalid=3205, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 05:30:50,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5299 states. [2021-06-05 05:30:50,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5299 to 4635. [2021-06-05 05:30:50,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4635 states, 4634 states have (on average 2.9974104445403538) internal successors, (13890), 4634 states have internal predecessors, (13890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:30:50,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4635 states to 4635 states and 13890 transitions. [2021-06-05 05:30:50,980 INFO L78 Accepts]: Start accepts. Automaton has 4635 states and 13890 transitions. Word has length 37 [2021-06-05 05:30:50,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:30:50,981 INFO L482 AbstractCegarLoop]: Abstraction has 4635 states and 13890 transitions. [2021-06-05 05:30:50,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:30:50,981 INFO L276 IsEmpty]: Start isEmpty. Operand 4635 states and 13890 transitions. [2021-06-05 05:30:50,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:30:50,986 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:30:50,986 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:30:51,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 05:30:51,188 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:30:51,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:30:51,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1048879948, now seen corresponding path program 15 times [2021-06-05 05:30:51,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:30:51,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076323633] [2021-06-05 05:30:51,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:30:51,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:30:51,497 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:30:51,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:30:51,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076323633] [2021-06-05 05:30:51,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076323633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:30:51,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496182809] [2021-06-05 05:30:51,497 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 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 05:30:51,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:30:51,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:30:51,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:30:51,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:30:51,736 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:30:51,736 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 25 treesize of output 13 [2021-06-05 05:30:51,737 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:30:51,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:30:51,743 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 05:30:51,743 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 05:30:51,974 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:30:51,974 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 34 treesize of output 18 [2021-06-05 05:30:51,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:30:51,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:30:51,981 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 05:30:51,981 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:23 [2021-06-05 05:30:52,198 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:30:52,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496182809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:30:52,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:30:52,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:30:52,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983061256] [2021-06-05 05:30:52,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:30:52,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:30:52,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:30:52,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1250, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:30:52,199 INFO L87 Difference]: Start difference. First operand 4635 states and 13890 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:30:54,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:30:54,664 INFO L93 Difference]: Finished difference Result 5534 states and 16364 transitions. [2021-06-05 05:30:54,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 05:30:54,664 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:30:54,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:30:54,671 INFO L225 Difference]: With dead ends: 5534 [2021-06-05 05:30:54,671 INFO L226 Difference]: Without dead ends: 5390 [2021-06-05 05:30:54,671 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1663.7ms TimeCoverageRelationStatistics Valid=227, Invalid=3195, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 05:30:54,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5390 states. [2021-06-05 05:30:54,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5390 to 4632. [2021-06-05 05:30:54,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4632 states, 4631 states have (on average 2.997624703087886) internal successors, (13882), 4631 states have internal predecessors, (13882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:30:54,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4632 states to 4632 states and 13882 transitions. [2021-06-05 05:30:54,730 INFO L78 Accepts]: Start accepts. Automaton has 4632 states and 13882 transitions. Word has length 37 [2021-06-05 05:30:54,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:30:54,730 INFO L482 AbstractCegarLoop]: Abstraction has 4632 states and 13882 transitions. [2021-06-05 05:30:54,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:30:54,730 INFO L276 IsEmpty]: Start isEmpty. Operand 4632 states and 13882 transitions. [2021-06-05 05:30:54,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:30:54,735 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:30:54,735 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:30:54,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:30:54,935 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:30:54,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:30:54,936 INFO L82 PathProgramCache]: Analyzing trace with hash -157991202, now seen corresponding path program 16 times [2021-06-05 05:30:54,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:30:54,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13066058] [2021-06-05 05:30:54,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:30:54,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:30:55,246 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:30:55,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:30:55,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13066058] [2021-06-05 05:30:55,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13066058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:30:55,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32765536] [2021-06-05 05:30:55,246 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 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 05:30:55,272 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:30:55,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:30:55,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:30:55,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:30:55,484 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:30:55,484 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 31 treesize of output 15 [2021-06-05 05:30:55,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:30:55,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:30:55,494 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 05:30:55,494 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:32 [2021-06-05 05:30:55,721 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:30:55,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 05:30:55,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:30:55,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:30:55,728 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 05:30:55,728 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 05:30:55,924 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:30:55,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32765536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:30:55,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:30:55,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:30:55,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270917143] [2021-06-05 05:30:55,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:30:55,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:30:55,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:30:55,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1251, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:30:55,925 INFO L87 Difference]: Start difference. First operand 4632 states and 13882 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:30:58,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:30:58,149 INFO L93 Difference]: Finished difference Result 5614 states and 16607 transitions. [2021-06-05 05:30:58,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 05:30:58,150 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:30:58,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:30:58,156 INFO L225 Difference]: With dead ends: 5614 [2021-06-05 05:30:58,157 INFO L226 Difference]: Without dead ends: 5463 [2021-06-05 05:30:58,157 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 1498.9ms TimeCoverageRelationStatistics Valid=192, Invalid=2778, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 05:30:58,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5463 states. [2021-06-05 05:30:58,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5463 to 4636. [2021-06-05 05:30:58,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4636 states, 4635 states have (on average 2.9978425026968716) internal successors, (13895), 4635 states have internal predecessors, (13895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:30:58,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4636 states to 4636 states and 13895 transitions. [2021-06-05 05:30:58,222 INFO L78 Accepts]: Start accepts. Automaton has 4636 states and 13895 transitions. Word has length 37 [2021-06-05 05:30:58,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:30:58,222 INFO L482 AbstractCegarLoop]: Abstraction has 4636 states and 13895 transitions. [2021-06-05 05:30:58,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:30:58,222 INFO L276 IsEmpty]: Start isEmpty. Operand 4636 states and 13895 transitions. [2021-06-05 05:30:58,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:30:58,228 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:30:58,228 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:30:58,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 05:30:58,450 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:30:58,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:30:58,450 INFO L82 PathProgramCache]: Analyzing trace with hash -934377174, now seen corresponding path program 17 times [2021-06-05 05:30:58,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:30:58,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416483616] [2021-06-05 05:30:58,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:30:58,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:30:58,768 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:30:58,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:30:58,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416483616] [2021-06-05 05:30:58,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416483616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:30:58,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174791670] [2021-06-05 05:30:58,768 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 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 05:30:58,806 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:30:58,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:30:58,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:30:58,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:30:59,025 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:30:59,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 05:30:59,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:30:59,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:30:59,033 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 05:30:59,034 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 05:30:59,229 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:30:59,229 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 36 treesize of output 20 [2021-06-05 05:30:59,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:30:59,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:30:59,236 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 05:30:59,236 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:20 [2021-06-05 05:30:59,361 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:30:59,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174791670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:30:59,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:30:59,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 35 [2021-06-05 05:30:59,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522994757] [2021-06-05 05:30:59,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:30:59,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:30:59,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:30:59,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1169, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:30:59,362 INFO L87 Difference]: Start difference. First operand 4636 states and 13895 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 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 05:31:00,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:31:00,310 INFO L93 Difference]: Finished difference Result 5069 states and 14964 transitions. [2021-06-05 05:31:00,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:31:00,314 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 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 05:31:00,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:31:00,320 INFO L225 Difference]: With dead ends: 5069 [2021-06-05 05:31:00,320 INFO L226 Difference]: Without dead ends: 4951 [2021-06-05 05:31:00,320 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 1055.3ms TimeCoverageRelationStatistics Valid=166, Invalid=2090, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:31:00,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4951 states. [2021-06-05 05:31:00,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4951 to 4642. [2021-06-05 05:31:00,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4642 states, 4641 states have (on average 2.9967679379444085) internal successors, (13908), 4641 states have internal predecessors, (13908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:31:00,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4642 states to 4642 states and 13908 transitions. [2021-06-05 05:31:00,378 INFO L78 Accepts]: Start accepts. Automaton has 4642 states and 13908 transitions. Word has length 37 [2021-06-05 05:31:00,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:31:00,378 INFO L482 AbstractCegarLoop]: Abstraction has 4642 states and 13908 transitions. [2021-06-05 05:31:00,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 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 05:31:00,378 INFO L276 IsEmpty]: Start isEmpty. Operand 4642 states and 13908 transitions. [2021-06-05 05:31:00,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:31:00,384 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:31:00,384 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:31:00,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 05:31:00,600 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:31:00,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:31:00,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1016325344, now seen corresponding path program 18 times [2021-06-05 05:31:00,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:31:00,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770678362] [2021-06-05 05:31:00,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:31:00,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:31:00,930 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:31:00,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:31:00,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770678362] [2021-06-05 05:31:00,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770678362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:31:00,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482794326] [2021-06-05 05:31:00,930 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 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 05:31:00,971 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:31:00,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:31:00,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:31:00,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:31:01,303 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:31:01,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 05:31:01,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:31:01,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:31:01,311 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 05:31:01,311 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 05:31:01,382 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:31:01,382 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 29 treesize of output 17 [2021-06-05 05:31:01,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:31:01,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:31:01,389 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 05:31:01,389 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:31:01,491 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:31:01,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482794326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:31:01,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:31:01,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 35 [2021-06-05 05:31:01,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835226243] [2021-06-05 05:31:01,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:31:01,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:31:01,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:31:01,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1165, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:31:01,492 INFO L87 Difference]: Start difference. First operand 4642 states and 13908 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 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 05:31:04,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:31:04,544 INFO L93 Difference]: Finished difference Result 8061 states and 23468 transitions. [2021-06-05 05:31:04,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 05:31:04,544 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 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 05:31:04,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:31:04,553 INFO L225 Difference]: With dead ends: 8061 [2021-06-05 05:31:04,554 INFO L226 Difference]: Without dead ends: 7907 [2021-06-05 05:31:04,554 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 2203.9ms TimeCoverageRelationStatistics Valid=542, Invalid=5158, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 05:31:04,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7907 states. [2021-06-05 05:31:04,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7907 to 4891. [2021-06-05 05:31:04,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4891 states, 4890 states have (on average 2.9883435582822084) internal successors, (14613), 4890 states have internal predecessors, (14613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:31:04,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4891 states to 4891 states and 14613 transitions. [2021-06-05 05:31:04,623 INFO L78 Accepts]: Start accepts. Automaton has 4891 states and 14613 transitions. Word has length 37 [2021-06-05 05:31:04,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:31:04,623 INFO L482 AbstractCegarLoop]: Abstraction has 4891 states and 14613 transitions. [2021-06-05 05:31:04,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 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 05:31:04,623 INFO L276 IsEmpty]: Start isEmpty. Operand 4891 states and 14613 transitions. [2021-06-05 05:31:04,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:31:04,628 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:31:04,628 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:31:04,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:31:04,834 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:31:04,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:31:04,834 INFO L82 PathProgramCache]: Analyzing trace with hash 587564316, now seen corresponding path program 19 times [2021-06-05 05:31:04,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:31:04,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871272213] [2021-06-05 05:31:04,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:31:04,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:31:05,157 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:31:05,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:31:05,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871272213] [2021-06-05 05:31:05,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871272213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:31:05,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862847266] [2021-06-05 05:31:05,158 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 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 05:31:05,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:31:05,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:31:05,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:31:05,405 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:31:05,405 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 31 treesize of output 15 [2021-06-05 05:31:05,407 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:31:05,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:31:05,415 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 05:31:05,415 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:32 [2021-06-05 05:31:05,597 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:31:05,597 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 29 treesize of output 17 [2021-06-05 05:31:05,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:31:05,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:31:05,604 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 05:31:05,604 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:31:05,790 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:31:05,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862847266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:31:05,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:31:05,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 05:31:05,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498843198] [2021-06-05 05:31:05,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:31:05,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:31:05,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:31:05,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1384, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:31:05,792 INFO L87 Difference]: Start difference. First operand 4891 states and 14613 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:31:09,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:31:09,001 INFO L93 Difference]: Finished difference Result 8551 states and 24980 transitions. [2021-06-05 05:31:09,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 05:31:09,001 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:31:09,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:31:09,012 INFO L225 Difference]: With dead ends: 8551 [2021-06-05 05:31:09,012 INFO L226 Difference]: Without dead ends: 8332 [2021-06-05 05:31:09,013 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1934 ImplicationChecksByTransitivity, 2672.2ms TimeCoverageRelationStatistics Valid=706, Invalid=7484, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 05:31:09,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8332 states. [2021-06-05 05:31:09,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8332 to 5056. [2021-06-05 05:31:09,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5056 states, 5055 states have (on average 2.9887240356083087) internal successors, (15108), 5055 states have internal predecessors, (15108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:31:09,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5056 states to 5056 states and 15108 transitions. [2021-06-05 05:31:09,091 INFO L78 Accepts]: Start accepts. Automaton has 5056 states and 15108 transitions. Word has length 37 [2021-06-05 05:31:09,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:31:09,091 INFO L482 AbstractCegarLoop]: Abstraction has 5056 states and 15108 transitions. [2021-06-05 05:31:09,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:31:09,091 INFO L276 IsEmpty]: Start isEmpty. Operand 5056 states and 15108 transitions. [2021-06-05 05:31:09,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:31:09,097 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:31:09,097 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:31:09,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 05:31:09,301 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:31:09,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:31:09,302 INFO L82 PathProgramCache]: Analyzing trace with hash -2011096740, now seen corresponding path program 20 times [2021-06-05 05:31:09,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:31:09,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697017500] [2021-06-05 05:31:09,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:31:09,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:31:09,601 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:31:09,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:31:09,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697017500] [2021-06-05 05:31:09,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697017500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:31:09,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127591918] [2021-06-05 05:31:09,601 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 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 05:31:09,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:31:09,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:31:09,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:31:09,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:31:09,847 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:31:09,847 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 25 treesize of output 13 [2021-06-05 05:31:09,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:31:09,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:31:09,855 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 05:31:09,855 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 05:31:10,044 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:31:10,044 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 29 treesize of output 17 [2021-06-05 05:31:10,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:31:10,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:31:10,051 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 05:31:10,051 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:31:10,270 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:31:10,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127591918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:31:10,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:31:10,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:31:10,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032101550] [2021-06-05 05:31:10,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:31:10,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:31:10,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:31:10,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1253, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:31:10,274 INFO L87 Difference]: Start difference. First operand 5056 states and 15108 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:31:12,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:31:12,639 INFO L93 Difference]: Finished difference Result 5720 states and 16885 transitions. [2021-06-05 05:31:12,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 05:31:12,639 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:31:12,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:31:12,646 INFO L225 Difference]: With dead ends: 5720 [2021-06-05 05:31:12,647 INFO L226 Difference]: Without dead ends: 5568 [2021-06-05 05:31:12,647 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 1580.6ms TimeCoverageRelationStatistics Valid=218, Invalid=3088, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 05:31:12,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5568 states. [2021-06-05 05:31:12,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5568 to 5011. [2021-06-05 05:31:12,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5011 states, 5010 states have (on average 2.9940119760479043) internal successors, (15000), 5010 states have internal predecessors, (15000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:31:12,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5011 states to 5011 states and 15000 transitions. [2021-06-05 05:31:12,710 INFO L78 Accepts]: Start accepts. Automaton has 5011 states and 15000 transitions. Word has length 37 [2021-06-05 05:31:12,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:31:12,710 INFO L482 AbstractCegarLoop]: Abstraction has 5011 states and 15000 transitions. [2021-06-05 05:31:12,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:31:12,710 INFO L276 IsEmpty]: Start isEmpty. Operand 5011 states and 15000 transitions. [2021-06-05 05:31:12,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:31:12,715 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:31:12,715 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:31:12,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:31:12,928 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:31:12,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:31:12,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1156799690, now seen corresponding path program 21 times [2021-06-05 05:31:12,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:31:12,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189986854] [2021-06-05 05:31:12,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:31:12,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:31:13,279 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:31:13,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:31:13,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189986854] [2021-06-05 05:31:13,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189986854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:31:13,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006960219] [2021-06-05 05:31:13,280 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 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 05:31:13,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:31:13,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:31:13,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:31:13,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:31:13,536 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:31:13,537 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 31 treesize of output 19 [2021-06-05 05:31:13,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:31:13,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:31:13,545 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 05:31:13,545 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:33 [2021-06-05 05:31:13,730 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:31:13,731 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 43 treesize of output 23 [2021-06-05 05:31:13,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:31:13,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:31:13,737 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 05:31:13,737 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:20 [2021-06-05 05:31:13,911 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:31:13,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006960219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:31:13,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:31:13,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 05:31:13,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5461681] [2021-06-05 05:31:13,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:31:13,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:31:13,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:31:13,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1384, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:31:13,912 INFO L87 Difference]: Start difference. First operand 5011 states and 15000 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:31:17,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:31:17,430 INFO L93 Difference]: Finished difference Result 8693 states and 25428 transitions. [2021-06-05 05:31:17,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 05:31:17,430 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:31:17,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:31:17,440 INFO L225 Difference]: With dead ends: 8693 [2021-06-05 05:31:17,440 INFO L226 Difference]: Without dead ends: 8474 [2021-06-05 05:31:17,441 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2020 ImplicationChecksByTransitivity, 2751.0ms TimeCoverageRelationStatistics Valid=674, Invalid=7698, Unknown=0, NotChecked=0, Total=8372 [2021-06-05 05:31:17,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8474 states. [2021-06-05 05:31:17,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8474 to 4990. [2021-06-05 05:31:17,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4990 states, 4989 states have (on average 2.993986770895971) internal successors, (14937), 4989 states have internal predecessors, (14937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:31:17,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4990 states to 4990 states and 14937 transitions. [2021-06-05 05:31:17,513 INFO L78 Accepts]: Start accepts. Automaton has 4990 states and 14937 transitions. Word has length 37 [2021-06-05 05:31:17,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:31:17,513 INFO L482 AbstractCegarLoop]: Abstraction has 4990 states and 14937 transitions. [2021-06-05 05:31:17,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:31:17,513 INFO L276 IsEmpty]: Start isEmpty. Operand 4990 states and 14937 transitions. [2021-06-05 05:31:17,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:31:17,518 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:31:17,518 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:31:17,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-06-05 05:31:17,721 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:31:17,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:31:17,722 INFO L82 PathProgramCache]: Analyzing trace with hash 539506550, now seen corresponding path program 22 times [2021-06-05 05:31:17,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:31:17,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950381560] [2021-06-05 05:31:17,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:31:17,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:31:18,031 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:31:18,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:31:18,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950381560] [2021-06-05 05:31:18,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950381560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:31:18,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120165605] [2021-06-05 05:31:18,031 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 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 05:31:18,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:31:18,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:31:18,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:31:18,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:31:18,282 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:31:18,282 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 31 treesize of output 15 [2021-06-05 05:31:18,283 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:31:18,290 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:31:18,290 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 05:31:18,291 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:32 [2021-06-05 05:31:18,473 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:31:18,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 05:31:18,475 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:31:18,480 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:31:18,480 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 05:31:18,480 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:31:18,693 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:31:18,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120165605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:31:18,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:31:18,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:31:18,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329833001] [2021-06-05 05:31:18,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:31:18,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:31:18,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:31:18,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1253, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:31:18,694 INFO L87 Difference]: Start difference. First operand 4990 states and 14937 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:31:21,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:31:21,159 INFO L93 Difference]: Finished difference Result 5779 states and 17074 transitions. [2021-06-05 05:31:21,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 05:31:21,159 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:31:21,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:31:21,166 INFO L225 Difference]: With dead ends: 5779 [2021-06-05 05:31:21,166 INFO L226 Difference]: Without dead ends: 5642 [2021-06-05 05:31:21,167 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 1644.6ms TimeCoverageRelationStatistics Valid=206, Invalid=3100, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 05:31:21,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5642 states. [2021-06-05 05:31:21,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5642 to 5000. [2021-06-05 05:31:21,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5000 states, 4999 states have (on average 2.99379875975195) internal successors, (14966), 4999 states have internal predecessors, (14966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:31:21,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5000 states to 5000 states and 14966 transitions. [2021-06-05 05:31:21,228 INFO L78 Accepts]: Start accepts. Automaton has 5000 states and 14966 transitions. Word has length 37 [2021-06-05 05:31:21,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:31:21,229 INFO L482 AbstractCegarLoop]: Abstraction has 5000 states and 14966 transitions. [2021-06-05 05:31:21,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:31:21,229 INFO L276 IsEmpty]: Start isEmpty. Operand 5000 states and 14966 transitions. [2021-06-05 05:31:21,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:31:21,234 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:31:21,234 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:31:21,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:31:21,435 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:31:21,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:31:21,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1641206606, now seen corresponding path program 23 times [2021-06-05 05:31:21,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:31:21,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764752313] [2021-06-05 05:31:21,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:31:21,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:31:21,759 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:31:21,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:31:21,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764752313] [2021-06-05 05:31:21,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764752313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:31:21,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529619408] [2021-06-05 05:31:21,760 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 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 05:31:21,799 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:31:21,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:31:21,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:31:21,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:31:22,011 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:31:22,011 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 27 treesize of output 15 [2021-06-05 05:31:22,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:31:22,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:31:22,020 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 05:31:22,020 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 05:31:22,150 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:31:22,150 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 27 treesize of output 15 [2021-06-05 05:31:22,151 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:31:22,155 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:31:22,156 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 05:31:22,156 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:17 [2021-06-05 05:31:22,296 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:31:22,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529619408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:31:22,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:31:22,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-06-05 05:31:22,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000023390] [2021-06-05 05:31:22,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:31:22,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:31:22,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:31:22,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1108, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:31:22,297 INFO L87 Difference]: Start difference. First operand 5000 states and 14966 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 05:31:24,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:31:24,173 INFO L93 Difference]: Finished difference Result 5952 states and 17565 transitions. [2021-06-05 05:31:24,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:31:24,173 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 05:31:24,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:31:24,180 INFO L225 Difference]: With dead ends: 5952 [2021-06-05 05:31:24,181 INFO L226 Difference]: Without dead ends: 5801 [2021-06-05 05:31:24,181 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 1306.5ms TimeCoverageRelationStatistics Valid=183, Invalid=2469, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 05:31:24,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5801 states. [2021-06-05 05:31:24,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5801 to 5013. [2021-06-05 05:31:24,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5013 states, 5012 states have (on average 2.99341580207502) internal successors, (15003), 5012 states have internal predecessors, (15003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:31:24,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5013 states to 5013 states and 15003 transitions. [2021-06-05 05:31:24,247 INFO L78 Accepts]: Start accepts. Automaton has 5013 states and 15003 transitions. Word has length 37 [2021-06-05 05:31:24,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:31:24,248 INFO L482 AbstractCegarLoop]: Abstraction has 5013 states and 15003 transitions. [2021-06-05 05:31:24,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 05:31:24,248 INFO L276 IsEmpty]: Start isEmpty. Operand 5013 states and 15003 transitions. [2021-06-05 05:31:24,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:31:24,254 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:31:24,254 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:31:24,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-05 05:31:24,461 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:31:24,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:31:24,461 INFO L82 PathProgramCache]: Analyzing trace with hash 2102986310, now seen corresponding path program 24 times [2021-06-05 05:31:24,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:31:24,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625428221] [2021-06-05 05:31:24,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:31:24,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:31:24,834 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:31:24,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:31:24,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625428221] [2021-06-05 05:31:24,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625428221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:31:24,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535040229] [2021-06-05 05:31:24,835 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 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 05:31:24,863 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:31:24,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:31:24,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:31:24,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:31:25,081 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:31:25,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 05:31:25,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:31:25,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:31:25,088 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 05:31:25,089 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 05:31:25,274 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:31:25,274 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 29 treesize of output 17 [2021-06-05 05:31:25,276 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:31:25,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:31:25,281 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 05:31:25,281 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:31:25,395 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:31:25,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535040229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:31:25,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:31:25,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16] total 36 [2021-06-05 05:31:25,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418493008] [2021-06-05 05:31:25,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:31:25,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:31:25,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:31:25,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1237, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:31:25,396 INFO L87 Difference]: Start difference. First operand 5013 states and 15003 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:31:28,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:31:28,342 INFO L93 Difference]: Finished difference Result 7849 states and 22977 transitions. [2021-06-05 05:31:28,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 05:31:28,343 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:31:28,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:31:28,353 INFO L225 Difference]: With dead ends: 7849 [2021-06-05 05:31:28,353 INFO L226 Difference]: Without dead ends: 7723 [2021-06-05 05:31:28,354 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1564 ImplicationChecksByTransitivity, 2306.3ms TimeCoverageRelationStatistics Valid=524, Invalid=6282, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 05:31:28,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7723 states. [2021-06-05 05:31:28,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7723 to 4949. [2021-06-05 05:31:28,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4949 states, 4948 states have (on average 2.994341147938561) internal successors, (14816), 4948 states have internal predecessors, (14816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:31:28,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4949 states to 4949 states and 14816 transitions. [2021-06-05 05:31:28,433 INFO L78 Accepts]: Start accepts. Automaton has 4949 states and 14816 transitions. Word has length 37 [2021-06-05 05:31:28,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:31:28,433 INFO L482 AbstractCegarLoop]: Abstraction has 4949 states and 14816 transitions. [2021-06-05 05:31:28,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:31:28,433 INFO L276 IsEmpty]: Start isEmpty. Operand 4949 states and 14816 transitions. [2021-06-05 05:31:28,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:31:28,439 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:31:28,439 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:31:28,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:31:28,653 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:31:28,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:31:28,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1940981080, now seen corresponding path program 25 times [2021-06-05 05:31:28,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:31:28,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725490652] [2021-06-05 05:31:28,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:31:28,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:31:29,016 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:31:29,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:31:29,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725490652] [2021-06-05 05:31:29,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725490652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:31:29,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747955360] [2021-06-05 05:31:29,016 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 05:31:29,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:31:29,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:31:29,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:31:29,262 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:31:29,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2021-06-05 05:31:29,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:31:29,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:31:29,271 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 05:31:29,271 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:32 [2021-06-05 05:31:29,469 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:31:29,469 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 29 treesize of output 17 [2021-06-05 05:31:29,470 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:31:29,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:31:29,476 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 05:31:29,476 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:31:29,666 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:31:29,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747955360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:31:29,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:31:29,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 05:31:29,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262935251] [2021-06-05 05:31:29,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:31:29,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:31:29,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:31:29,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1384, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:31:29,668 INFO L87 Difference]: Start difference. First operand 4949 states and 14816 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:31:32,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:31:32,324 INFO L93 Difference]: Finished difference Result 8528 states and 25143 transitions. [2021-06-05 05:31:32,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 05:31:32,324 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:31:32,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:31:32,335 INFO L225 Difference]: With dead ends: 8528 [2021-06-05 05:31:32,335 INFO L226 Difference]: Without dead ends: 8285 [2021-06-05 05:31:32,335 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1362 ImplicationChecksByTransitivity, 2182.8ms TimeCoverageRelationStatistics Valid=476, Invalid=5844, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 05:31:32,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8285 states. [2021-06-05 05:31:32,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8285 to 4893. [2021-06-05 05:31:32,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4893 states, 4892 states have (on average 2.994276369582993) internal successors, (14648), 4892 states have internal predecessors, (14648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:31:32,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4893 states to 4893 states and 14648 transitions. [2021-06-05 05:31:32,417 INFO L78 Accepts]: Start accepts. Automaton has 4893 states and 14648 transitions. Word has length 37 [2021-06-05 05:31:32,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:31:32,417 INFO L482 AbstractCegarLoop]: Abstraction has 4893 states and 14648 transitions. [2021-06-05 05:31:32,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:31:32,417 INFO L276 IsEmpty]: Start isEmpty. Operand 4893 states and 14648 transitions. [2021-06-05 05:31:32,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:31:32,423 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:31:32,423 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:31:32,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 05:31:32,637 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:31:32,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:31:32,637 INFO L82 PathProgramCache]: Analyzing trace with hash -657679976, now seen corresponding path program 26 times [2021-06-05 05:31:32,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:31:32,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818168371] [2021-06-05 05:31:32,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:31:32,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:31:32,918 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:31:32,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:31:32,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818168371] [2021-06-05 05:31:32,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818168371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:31:32,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210774892] [2021-06-05 05:31:32,918 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 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 05:31:32,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:31:32,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:31:32,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:31:32,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:31:33,168 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:31:33,168 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 25 treesize of output 13 [2021-06-05 05:31:33,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:31:33,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:31:33,177 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 05:31:33,177 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 05:31:33,378 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:31:33,379 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 29 treesize of output 17 [2021-06-05 05:31:33,380 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:31:33,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:31:33,386 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 05:31:33,386 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:31:33,615 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:31:33,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210774892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:31:33,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:31:33,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:31:33,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219461481] [2021-06-05 05:31:33,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:31:33,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:31:33,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:31:33,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1253, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:31:33,616 INFO L87 Difference]: Start difference. First operand 4893 states and 14648 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:31:36,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:31:36,037 INFO L93 Difference]: Finished difference Result 5657 states and 16743 transitions. [2021-06-05 05:31:36,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 05:31:36,038 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:31:36,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:31:36,045 INFO L225 Difference]: With dead ends: 5657 [2021-06-05 05:31:36,045 INFO L226 Difference]: Without dead ends: 5520 [2021-06-05 05:31:36,046 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1574.5ms TimeCoverageRelationStatistics Valid=203, Invalid=2989, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 05:31:36,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5520 states. [2021-06-05 05:31:36,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5520 to 4916. [2021-06-05 05:31:36,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4916 states, 4915 states have (on average 2.9936927772126145) internal successors, (14714), 4915 states have internal predecessors, (14714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:31:36,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4916 states to 4916 states and 14714 transitions. [2021-06-05 05:31:36,111 INFO L78 Accepts]: Start accepts. Automaton has 4916 states and 14714 transitions. Word has length 37 [2021-06-05 05:31:36,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:31:36,111 INFO L482 AbstractCegarLoop]: Abstraction has 4916 states and 14714 transitions. [2021-06-05 05:31:36,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:31:36,111 INFO L276 IsEmpty]: Start isEmpty. Operand 4916 states and 14714 transitions. [2021-06-05 05:31:36,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:31:36,117 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:31:36,117 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:31:36,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:31:36,317 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:31:36,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:31:36,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1456574164, now seen corresponding path program 27 times [2021-06-05 05:31:36,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:31:36,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173329001] [2021-06-05 05:31:36,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:31:36,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:31:36,620 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:31:36,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:31:36,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173329001] [2021-06-05 05:31:36,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173329001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:31:36,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419391821] [2021-06-05 05:31:36,621 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 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 05:31:36,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:31:36,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:31:36,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:31:36,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:31:36,863 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:31:36,864 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 25 treesize of output 13 [2021-06-05 05:31:36,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:31:36,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:31:36,871 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 05:31:36,871 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 05:31:37,093 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:31:37,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 18 [2021-06-05 05:31:37,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:31:37,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:31:37,100 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 05:31:37,100 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:23 [2021-06-05 05:31:37,293 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:31:37,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419391821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:31:37,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:31:37,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:31:37,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905448397] [2021-06-05 05:31:37,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:31:37,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:31:37,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:31:37,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:31:37,294 INFO L87 Difference]: Start difference. First operand 4916 states and 14714 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:31:39,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:31:39,872 INFO L93 Difference]: Finished difference Result 5782 states and 17101 transitions. [2021-06-05 05:31:39,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 05:31:39,873 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:31:39,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:31:39,880 INFO L225 Difference]: With dead ends: 5782 [2021-06-05 05:31:39,880 INFO L226 Difference]: Without dead ends: 5638 [2021-06-05 05:31:39,880 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 1664.6ms TimeCoverageRelationStatistics Valid=220, Invalid=3086, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 05:31:39,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5638 states. [2021-06-05 05:31:39,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5638 to 4906. [2021-06-05 05:31:39,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4906 states, 4905 states have (on average 2.99388379204893) internal successors, (14685), 4905 states have internal predecessors, (14685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:31:39,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4906 states to 4906 states and 14685 transitions. [2021-06-05 05:31:39,944 INFO L78 Accepts]: Start accepts. Automaton has 4906 states and 14685 transitions. Word has length 37 [2021-06-05 05:31:39,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:31:39,945 INFO L482 AbstractCegarLoop]: Abstraction has 4906 states and 14685 transitions. [2021-06-05 05:31:39,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:31:39,945 INFO L276 IsEmpty]: Start isEmpty. Operand 4906 states and 14685 transitions. [2021-06-05 05:31:39,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:31:39,950 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:31:39,950 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:31:40,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:31:40,151 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:31:40,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:31:40,152 INFO L82 PathProgramCache]: Analyzing trace with hash 249703014, now seen corresponding path program 28 times [2021-06-05 05:31:40,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:31:40,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333506130] [2021-06-05 05:31:40,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:31:40,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:31:40,443 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:31:40,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:31:40,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333506130] [2021-06-05 05:31:40,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333506130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:31:40,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515860644] [2021-06-05 05:31:40,444 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 05:31:40,482 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:31:40,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:31:40,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 05:31:40,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:31:40,705 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:31:40,705 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 31 treesize of output 15 [2021-06-05 05:31:40,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:31:40,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:31:40,713 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 05:31:40,713 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:32 [2021-06-05 05:31:40,849 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:31:40,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 21 [2021-06-05 05:31:40,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:31:40,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:31:40,856 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 05:31:40,856 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:18 [2021-06-05 05:31:41,006 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:31:41,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515860644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:31:41,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:31:41,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-06-05 05:31:41,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768387489] [2021-06-05 05:31:41,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:31:41,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:31:41,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:31:41,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1107, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:31:41,007 INFO L87 Difference]: Start difference. First operand 4906 states and 14685 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 05:31:42,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:31:42,588 INFO L93 Difference]: Finished difference Result 5906 states and 17467 transitions. [2021-06-05 05:31:42,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:31:42,589 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 05:31:42,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:31:42,596 INFO L225 Difference]: With dead ends: 5906 [2021-06-05 05:31:42,596 INFO L226 Difference]: Without dead ends: 5748 [2021-06-05 05:31:42,596 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 1118.1ms TimeCoverageRelationStatistics Valid=160, Invalid=2096, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:31:42,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5748 states. [2021-06-05 05:31:42,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5748 to 4888. [2021-06-05 05:31:42,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4888 states, 4887 states have (on average 2.9950890116635973) internal successors, (14637), 4887 states have internal predecessors, (14637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:31:42,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4888 states to 4888 states and 14637 transitions. [2021-06-05 05:31:42,656 INFO L78 Accepts]: Start accepts. Automaton has 4888 states and 14637 transitions. Word has length 37 [2021-06-05 05:31:42,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:31:42,656 INFO L482 AbstractCegarLoop]: Abstraction has 4888 states and 14637 transitions. [2021-06-05 05:31:42,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 05:31:42,656 INFO L276 IsEmpty]: Start isEmpty. Operand 4888 states and 14637 transitions. [2021-06-05 05:31:42,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:31:42,661 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:31:42,661 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:31:42,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-05 05:31:42,862 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:31:42,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:31:42,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1967025990, now seen corresponding path program 29 times [2021-06-05 05:31:42,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:31:42,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163917129] [2021-06-05 05:31:42,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:31:42,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:31:43,188 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:31:43,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:31:43,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163917129] [2021-06-05 05:31:43,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163917129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:31:43,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388094809] [2021-06-05 05:31:43,188 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 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 05:31:43,230 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:31:43,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:31:43,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:31:43,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:31:43,418 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:31:43,418 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 27 treesize of output 15 [2021-06-05 05:31:43,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:31:43,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:31:43,426 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 05:31:43,426 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 05:31:43,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:31:43,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:31:43,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:31:43,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:31:43,675 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 29 treesize of output 17 [2021-06-05 05:31:43,676 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:31:43,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:31:43,708 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 05:31:43,708 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:20 [2021-06-05 05:31:43,901 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:31:43,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388094809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:31:43,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:31:43,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 05:31:43,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594597552] [2021-06-05 05:31:43,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:31:43,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:31:43,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:31:43,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1384, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:31:43,902 INFO L87 Difference]: Start difference. First operand 4888 states and 14637 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:31:47,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:31:47,343 INFO L93 Difference]: Finished difference Result 8302 states and 24248 transitions. [2021-06-05 05:31:47,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 05:31:47,345 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:31:47,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:31:47,355 INFO L225 Difference]: With dead ends: 8302 [2021-06-05 05:31:47,355 INFO L226 Difference]: Without dead ends: 8083 [2021-06-05 05:31:47,356 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2060 ImplicationChecksByTransitivity, 2963.1ms TimeCoverageRelationStatistics Valid=753, Invalid=7989, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 05:31:47,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8083 states. [2021-06-05 05:31:47,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8083 to 5052. [2021-06-05 05:31:47,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5052 states, 5051 states have (on average 2.9952484656503664) internal successors, (15129), 5051 states have internal predecessors, (15129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:31:47,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5052 states to 5052 states and 15129 transitions. [2021-06-05 05:31:47,428 INFO L78 Accepts]: Start accepts. Automaton has 5052 states and 15129 transitions. Word has length 37 [2021-06-05 05:31:47,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:31:47,428 INFO L482 AbstractCegarLoop]: Abstraction has 5052 states and 15129 transitions. [2021-06-05 05:31:47,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:31:47,428 INFO L276 IsEmpty]: Start isEmpty. Operand 5052 states and 15129 transitions. [2021-06-05 05:31:47,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:31:47,433 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:31:47,434 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:31:47,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:31:47,634 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:31:47,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:31:47,634 INFO L82 PathProgramCache]: Analyzing trace with hash -270719750, now seen corresponding path program 30 times [2021-06-05 05:31:47,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:31:47,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882884921] [2021-06-05 05:31:47,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:31:47,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:31:47,907 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:31:47,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:31:47,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882884921] [2021-06-05 05:31:47,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882884921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:31:47,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768216388] [2021-06-05 05:31:47,908 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 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 05:31:47,935 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:31:47,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:31:47,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:31:47,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:31:48,109 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:31:48,109 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 27 treesize of output 15 [2021-06-05 05:31:48,110 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:31:48,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:31:48,116 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 05:31:48,116 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:25 [2021-06-05 05:31:48,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:31:48,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:31:48,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:31:48,361 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 36 treesize of output 20 [2021-06-05 05:31:48,362 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:31:48,369 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:31:48,370 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 05:31:48,370 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:52, output treesize:20 [2021-06-05 05:31:48,476 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:31:48,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768216388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:31:48,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:31:48,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-06-05 05:31:48,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334629531] [2021-06-05 05:31:48,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:31:48,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:31:48,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:31:48,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1105, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:31:48,477 INFO L87 Difference]: Start difference. First operand 5052 states and 15129 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 05:31:49,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:31:49,822 INFO L93 Difference]: Finished difference Result 5549 states and 16371 transitions. [2021-06-05 05:31:49,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:31:49,822 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 05:31:49,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:31:49,829 INFO L225 Difference]: With dead ends: 5549 [2021-06-05 05:31:49,829 INFO L226 Difference]: Without dead ends: 5492 [2021-06-05 05:31:49,829 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 1306.3ms TimeCoverageRelationStatistics Valid=227, Invalid=2743, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 05:31:49,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5492 states. [2021-06-05 05:31:49,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5492 to 5096. [2021-06-05 05:31:49,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5096 states, 5095 states have (on average 2.991756624141315) internal successors, (15243), 5095 states have internal predecessors, (15243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:31:49,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5096 states to 5096 states and 15243 transitions. [2021-06-05 05:31:49,893 INFO L78 Accepts]: Start accepts. Automaton has 5096 states and 15243 transitions. Word has length 37 [2021-06-05 05:31:49,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:31:49,893 INFO L482 AbstractCegarLoop]: Abstraction has 5096 states and 15243 transitions. [2021-06-05 05:31:49,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 05:31:49,893 INFO L276 IsEmpty]: Start isEmpty. Operand 5096 states and 15243 transitions. [2021-06-05 05:31:49,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:31:49,899 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:31:49,899 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:31:50,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-05 05:31:50,100 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:31:50,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:31:50,100 INFO L82 PathProgramCache]: Analyzing trace with hash 583577300, now seen corresponding path program 31 times [2021-06-05 05:31:50,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:31:50,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195648507] [2021-06-05 05:31:50,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:31:50,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:31:50,415 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:31:50,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:31:50,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195648507] [2021-06-05 05:31:50,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195648507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:31:50,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892102228] [2021-06-05 05:31:50,415 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 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 05:31:50,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:31:50,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:31:50,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:31:50,632 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:31:50,633 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 29 treesize of output 13 [2021-06-05 05:31:50,634 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:31:50,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:31:50,640 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 05:31:50,640 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:24 [2021-06-05 05:31:50,851 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:31:50,852 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 29 treesize of output 17 [2021-06-05 05:31:50,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:31:50,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:31:50,858 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 05:31:50,858 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:31:51,034 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:31:51,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892102228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:31:51,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:31:51,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 05:31:51,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627683070] [2021-06-05 05:31:51,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:31:51,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:31:51,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:31:51,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1383, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:31:51,036 INFO L87 Difference]: Start difference. First operand 5096 states and 15243 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:31:53,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:31:53,839 INFO L93 Difference]: Finished difference Result 7807 states and 22813 transitions. [2021-06-05 05:31:53,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 05:31:53,840 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:31:53,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:31:53,850 INFO L225 Difference]: With dead ends: 7807 [2021-06-05 05:31:53,850 INFO L226 Difference]: Without dead ends: 7588 [2021-06-05 05:31:53,851 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1489 ImplicationChecksByTransitivity, 2346.1ms TimeCoverageRelationStatistics Valid=561, Invalid=6081, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 05:31:53,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7588 states. [2021-06-05 05:31:53,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7588 to 5071. [2021-06-05 05:31:53,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5071 states, 5070 states have (on average 2.991518737672584) internal successors, (15167), 5070 states have internal predecessors, (15167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:31:53,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5071 states to 5071 states and 15167 transitions. [2021-06-05 05:31:53,930 INFO L78 Accepts]: Start accepts. Automaton has 5071 states and 15167 transitions. Word has length 37 [2021-06-05 05:31:53,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:31:53,930 INFO L482 AbstractCegarLoop]: Abstraction has 5071 states and 15167 transitions. [2021-06-05 05:31:53,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:31:53,930 INFO L276 IsEmpty]: Start isEmpty. Operand 5071 states and 15167 transitions. [2021-06-05 05:31:53,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:31:53,936 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:31:53,936 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:31:54,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:31:54,137 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:31:54,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:31:54,137 INFO L82 PathProgramCache]: Analyzing trace with hash -451603996, now seen corresponding path program 32 times [2021-06-05 05:31:54,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:31:54,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595339187] [2021-06-05 05:31:54,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:31:54,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:31:54,446 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:31:54,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:31:54,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595339187] [2021-06-05 05:31:54,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595339187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:31:54,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589386425] [2021-06-05 05:31:54,447 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 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 05:31:54,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:31:54,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:31:54,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:31:54,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:31:54,693 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:31:54,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 05:31:54,695 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:31:54,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:31:54,702 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 05:31:54,702 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:22 [2021-06-05 05:31:54,956 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:31:54,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 05:31:54,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:31:54,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:31:54,964 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 05:31:54,964 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:31:55,147 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:31:55,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589386425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:31:55,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:31:55,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 05:31:55,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206818281] [2021-06-05 05:31:55,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:31:55,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:31:55,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:31:55,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1383, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:31:55,148 INFO L87 Difference]: Start difference. First operand 5071 states and 15167 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:31:57,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:31:57,936 INFO L93 Difference]: Finished difference Result 7932 states and 23187 transitions. [2021-06-05 05:31:57,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 05:31:57,937 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:31:57,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:31:57,946 INFO L225 Difference]: With dead ends: 7932 [2021-06-05 05:31:57,946 INFO L226 Difference]: Without dead ends: 7713 [2021-06-05 05:31:57,947 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1453 ImplicationChecksByTransitivity, 2273.6ms TimeCoverageRelationStatistics Valid=504, Invalid=5976, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 05:31:57,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7713 states. [2021-06-05 05:31:58,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7713 to 5034. [2021-06-05 05:31:58,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5034 states, 5033 states have (on average 2.9920524538048876) internal successors, (15059), 5033 states have internal predecessors, (15059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:31:58,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5034 states to 5034 states and 15059 transitions. [2021-06-05 05:31:58,015 INFO L78 Accepts]: Start accepts. Automaton has 5034 states and 15059 transitions. Word has length 37 [2021-06-05 05:31:58,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:31:58,016 INFO L482 AbstractCegarLoop]: Abstraction has 5034 states and 15059 transitions. [2021-06-05 05:31:58,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:31:58,016 INFO L276 IsEmpty]: Start isEmpty. Operand 5034 states and 15059 transitions. [2021-06-05 05:31:58,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:31:58,021 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:31:58,021 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:31:58,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 05:31:58,221 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:31:58,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:31:58,222 INFO L82 PathProgramCache]: Analyzing trace with hash -613609226, now seen corresponding path program 33 times [2021-06-05 05:31:58,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:31:58,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762390133] [2021-06-05 05:31:58,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:31:58,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:31:58,560 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:31:58,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:31:58,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762390133] [2021-06-05 05:31:58,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762390133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:31:58,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785689326] [2021-06-05 05:31:58,561 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 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 05:31:58,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:31:58,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:31:58,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:31:58,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:31:58,772 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:31:58,772 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 27 treesize of output 15 [2021-06-05 05:31:58,773 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:31:58,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:31:58,779 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 05:31:58,779 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:25 [2021-06-05 05:31:59,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:31:59,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:31:59,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:31:59,074 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 36 treesize of output 20 [2021-06-05 05:31:59,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:31:59,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:31:59,087 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 05:31:59,087 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:52, output treesize:20 [2021-06-05 05:31:59,195 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:31:59,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785689326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:31:59,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:31:59,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16] total 36 [2021-06-05 05:31:59,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430390859] [2021-06-05 05:31:59,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:31:59,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:31:59,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:31:59,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1238, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:31:59,196 INFO L87 Difference]: Start difference. First operand 5034 states and 15059 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:32:02,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:32:02,456 INFO L93 Difference]: Finished difference Result 8035 states and 23567 transitions. [2021-06-05 05:32:02,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 05:32:02,456 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:32:02,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:32:02,467 INFO L225 Difference]: With dead ends: 8035 [2021-06-05 05:32:02,467 INFO L226 Difference]: Without dead ends: 7789 [2021-06-05 05:32:02,467 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1459 ImplicationChecksByTransitivity, 2400.4ms TimeCoverageRelationStatistics Valid=511, Invalid=6131, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 05:32:02,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7789 states. [2021-06-05 05:32:02,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7789 to 5029. [2021-06-05 05:32:02,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5029 states, 5028 states have (on average 2.991447891805887) internal successors, (15041), 5028 states have internal predecessors, (15041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:32:02,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5029 states to 5029 states and 15041 transitions. [2021-06-05 05:32:02,555 INFO L78 Accepts]: Start accepts. Automaton has 5029 states and 15041 transitions. Word has length 37 [2021-06-05 05:32:02,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:32:02,555 INFO L482 AbstractCegarLoop]: Abstraction has 5029 states and 15041 transitions. [2021-06-05 05:32:02,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:32:02,555 INFO L276 IsEmpty]: Start isEmpty. Operand 5029 states and 15041 transitions. [2021-06-05 05:32:02,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:32:02,561 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:32:02,561 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:32:02,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-06-05 05:32:02,761 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:32:02,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:32:02,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1746600864, now seen corresponding path program 34 times [2021-06-05 05:32:02,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:32:02,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139631589] [2021-06-05 05:32:02,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:32:02,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:32:03,061 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:32:03,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:32:03,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139631589] [2021-06-05 05:32:03,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139631589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:32:03,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616463882] [2021-06-05 05:32:03,062 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 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 05:32:03,088 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:32:03,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:32:03,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:32:03,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:32:03,305 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:32:03,305 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 27 treesize of output 15 [2021-06-05 05:32:03,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:32:03,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:32:03,312 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 05:32:03,312 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 05:32:03,547 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:32:03,548 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 29 treesize of output 17 [2021-06-05 05:32:03,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:32:03,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:32:03,554 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 05:32:03,554 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:32:03,733 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:32:03,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616463882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:32:03,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:32:03,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 05:32:03,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469428911] [2021-06-05 05:32:03,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:32:03,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:32:03,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:32:03,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1383, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:32:03,734 INFO L87 Difference]: Start difference. First operand 5029 states and 15041 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:32:06,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:32:06,530 INFO L93 Difference]: Finished difference Result 8787 states and 26208 transitions. [2021-06-05 05:32:06,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 05:32:06,530 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:32:06,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:32:06,542 INFO L225 Difference]: With dead ends: 8787 [2021-06-05 05:32:06,542 INFO L226 Difference]: Without dead ends: 8664 [2021-06-05 05:32:06,542 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1424 ImplicationChecksByTransitivity, 2094.9ms TimeCoverageRelationStatistics Valid=478, Invalid=5842, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 05:32:06,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8664 states. [2021-06-05 05:32:06,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8664 to 5522. [2021-06-05 05:32:06,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5522 states, 5521 states have (on average 3.009599710197428) internal successors, (16616), 5521 states have internal predecessors, (16616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:32:06,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5522 states to 5522 states and 16616 transitions. [2021-06-05 05:32:06,629 INFO L78 Accepts]: Start accepts. Automaton has 5522 states and 16616 transitions. Word has length 37 [2021-06-05 05:32:06,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:32:06,629 INFO L482 AbstractCegarLoop]: Abstraction has 5522 states and 16616 transitions. [2021-06-05 05:32:06,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:32:06,629 INFO L276 IsEmpty]: Start isEmpty. Operand 5522 states and 16616 transitions. [2021-06-05 05:32:06,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:32:06,635 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:32:06,635 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:32:06,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:32:06,836 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:32:06,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:32:06,836 INFO L82 PathProgramCache]: Analyzing trace with hash -50294624, now seen corresponding path program 35 times [2021-06-05 05:32:06,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:32:06,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058081622] [2021-06-05 05:32:06,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:32:06,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:32:07,162 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:32:07,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:32:07,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058081622] [2021-06-05 05:32:07,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058081622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:32:07,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543029395] [2021-06-05 05:32:07,163 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 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 05:32:07,209 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:32:07,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:32:07,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 05:32:07,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:32:07,401 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:32:07,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 05:32:07,402 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:32:07,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:32:07,409 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 05:32:07,409 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:25 [2021-06-05 05:32:07,630 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:32:07,630 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 38 treesize of output 22 [2021-06-05 05:32:07,631 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:32:07,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:32:07,637 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 05:32:07,637 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:20 [2021-06-05 05:32:07,783 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:32:07,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543029395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:32:07,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:32:07,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 35 [2021-06-05 05:32:07,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246920823] [2021-06-05 05:32:07,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:32:07,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:32:07,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:32:07,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1170, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:32:07,784 INFO L87 Difference]: Start difference. First operand 5522 states and 16616 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 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 05:32:08,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:32:08,705 INFO L93 Difference]: Finished difference Result 5957 states and 17721 transitions. [2021-06-05 05:32:08,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:32:08,706 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 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 05:32:08,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:32:08,714 INFO L225 Difference]: With dead ends: 5957 [2021-06-05 05:32:08,714 INFO L226 Difference]: Without dead ends: 5921 [2021-06-05 05:32:08,714 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 1116.8ms TimeCoverageRelationStatistics Valid=178, Invalid=2272, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 05:32:08,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5921 states. [2021-06-05 05:32:08,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5921 to 5638. [2021-06-05 05:32:08,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5638 states, 5637 states have (on average 3.0014191946070605) internal successors, (16919), 5637 states have internal predecessors, (16919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:32:08,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5638 states to 5638 states and 16919 transitions. [2021-06-05 05:32:08,781 INFO L78 Accepts]: Start accepts. Automaton has 5638 states and 16919 transitions. Word has length 37 [2021-06-05 05:32:08,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:32:08,781 INFO L482 AbstractCegarLoop]: Abstraction has 5638 states and 16919 transitions. [2021-06-05 05:32:08,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 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 05:32:08,781 INFO L276 IsEmpty]: Start isEmpty. Operand 5638 states and 16919 transitions. [2021-06-05 05:32:08,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:32:08,787 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:32:08,787 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:32:08,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:32:08,988 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:32:08,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:32:08,988 INFO L82 PathProgramCache]: Analyzing trace with hash -114922920, now seen corresponding path program 36 times [2021-06-05 05:32:08,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:32:08,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980210756] [2021-06-05 05:32:08,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:32:09,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:32:09,285 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:32:09,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:32:09,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980210756] [2021-06-05 05:32:09,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980210756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:32:09,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008928166] [2021-06-05 05:32:09,285 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 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 05:32:09,313 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:32:09,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:32:09,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:32:09,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:32:09,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:32:09,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:32:09,761 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 33 treesize of output 21 [2021-06-05 05:32:09,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:32:09,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:32:09,772 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 05:32:09,772 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:63, output treesize:37 [2021-06-05 05:32:09,845 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:32:09,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 22 [2021-06-05 05:32:09,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:32:09,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:32:09,852 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 05:32:09,852 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:20 [2021-06-05 05:32:10,033 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:32:10,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008928166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:32:10,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:32:10,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2021-06-05 05:32:10,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122132761] [2021-06-05 05:32:10,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:32:10,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:32:10,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:32:10,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1177, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:32:10,034 INFO L87 Difference]: Start difference. First operand 5638 states and 16919 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 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 05:32:12,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:32:12,372 INFO L93 Difference]: Finished difference Result 6973 states and 20672 transitions. [2021-06-05 05:32:12,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:32:12,372 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 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 05:32:12,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:32:12,381 INFO L225 Difference]: With dead ends: 6973 [2021-06-05 05:32:12,381 INFO L226 Difference]: Without dead ends: 6709 [2021-06-05 05:32:12,382 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1881.6ms TimeCoverageRelationStatistics Valid=238, Invalid=3422, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 05:32:12,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6709 states. [2021-06-05 05:32:12,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6709 to 5709. [2021-06-05 05:32:12,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5709 states, 5708 states have (on average 2.994043447792572) internal successors, (17090), 5708 states have internal predecessors, (17090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:32:12,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5709 states to 5709 states and 17090 transitions. [2021-06-05 05:32:12,458 INFO L78 Accepts]: Start accepts. Automaton has 5709 states and 17090 transitions. Word has length 37 [2021-06-05 05:32:12,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:32:12,458 INFO L482 AbstractCegarLoop]: Abstraction has 5709 states and 17090 transitions. [2021-06-05 05:32:12,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 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 05:32:12,458 INFO L276 IsEmpty]: Start isEmpty. Operand 5709 states and 17090 transitions. [2021-06-05 05:32:12,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:32:12,464 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:32:12,464 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:32:12,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:32:12,665 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:32:12,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:32:12,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1399226358, now seen corresponding path program 37 times [2021-06-05 05:32:12,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:32:12,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358084860] [2021-06-05 05:32:12,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:32:12,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:32:12,950 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:32:12,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:32:12,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358084860] [2021-06-05 05:32:12,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358084860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:32:12,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732605283] [2021-06-05 05:32:12,951 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 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 05:32:12,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:32:12,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:32:12,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:32:13,297 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:32:13,297 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 25 treesize of output 13 [2021-06-05 05:32:13,298 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:32:13,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:32:13,305 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 05:32:13,305 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 05:32:13,371 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:32:13,371 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 29 treesize of output 17 [2021-06-05 05:32:13,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:32:13,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:32:13,378 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 05:32:13,378 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:32:13,559 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:32:13,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732605283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:32:13,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:32:13,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2021-06-05 05:32:13,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578658812] [2021-06-05 05:32:13,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:32:13,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:32:13,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:32:13,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1110, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:32:13,560 INFO L87 Difference]: Start difference. First operand 5709 states and 17090 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 05:32:15,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:32:15,684 INFO L93 Difference]: Finished difference Result 7129 states and 21094 transitions. [2021-06-05 05:32:15,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:32:15,685 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 05:32:15,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:32:15,711 INFO L225 Difference]: With dead ends: 7129 [2021-06-05 05:32:15,711 INFO L226 Difference]: Without dead ends: 6874 [2021-06-05 05:32:15,711 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 1589.4ms TimeCoverageRelationStatistics Valid=231, Invalid=3075, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 05:32:15,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6874 states. [2021-06-05 05:32:15,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6874 to 5817. [2021-06-05 05:32:15,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5817 states, 5816 states have (on average 2.9936382393397523) internal successors, (17411), 5816 states have internal predecessors, (17411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:32:15,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5817 states to 5817 states and 17411 transitions. [2021-06-05 05:32:15,780 INFO L78 Accepts]: Start accepts. Automaton has 5817 states and 17411 transitions. Word has length 37 [2021-06-05 05:32:15,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:32:15,780 INFO L482 AbstractCegarLoop]: Abstraction has 5817 states and 17411 transitions. [2021-06-05 05:32:15,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 05:32:15,780 INFO L276 IsEmpty]: Start isEmpty. Operand 5817 states and 17411 transitions. [2021-06-05 05:32:15,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:32:15,787 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:32:15,787 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:32:15,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 05:32:15,987 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:32:15,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:32:15,988 INFO L82 PathProgramCache]: Analyzing trace with hash 970465330, now seen corresponding path program 38 times [2021-06-05 05:32:15,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:32:15,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538676755] [2021-06-05 05:32:15,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:32:15,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:32:16,328 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:32:16,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:32:16,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538676755] [2021-06-05 05:32:16,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538676755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:32:16,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492637494] [2021-06-05 05:32:16,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 05:32:16,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:32:16,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:32:16,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:32:16,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:32:16,648 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:32:16,648 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 27 treesize of output 15 [2021-06-05 05:32:16,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:32:16,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:32:16,657 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 05:32:16,657 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 05:32:16,826 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:32:16,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 05:32:16,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:32:16,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:32:16,832 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 05:32:16,832 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:32:17,035 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:32:17,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492637494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:32:17,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:32:17,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:32:17,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363912674] [2021-06-05 05:32:17,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:32:17,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:32:17,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:32:17,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1250, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:32:17,036 INFO L87 Difference]: Start difference. First operand 5817 states and 17411 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:32:19,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:32:19,180 INFO L93 Difference]: Finished difference Result 7091 states and 21040 transitions. [2021-06-05 05:32:19,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:32:19,180 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:32:19,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:32:19,189 INFO L225 Difference]: With dead ends: 7091 [2021-06-05 05:32:19,190 INFO L226 Difference]: Without dead ends: 6901 [2021-06-05 05:32:19,190 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 1686.8ms TimeCoverageRelationStatistics Valid=239, Invalid=3421, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 05:32:19,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6901 states. [2021-06-05 05:32:19,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6901 to 5880. [2021-06-05 05:32:19,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5880 states, 5879 states have (on average 2.99319612178942) internal successors, (17597), 5879 states have internal predecessors, (17597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:32:19,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5880 states to 5880 states and 17597 transitions. [2021-06-05 05:32:19,268 INFO L78 Accepts]: Start accepts. Automaton has 5880 states and 17597 transitions. Word has length 37 [2021-06-05 05:32:19,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:32:19,268 INFO L482 AbstractCegarLoop]: Abstraction has 5880 states and 17597 transitions. [2021-06-05 05:32:19,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:32:19,268 INFO L276 IsEmpty]: Start isEmpty. Operand 5880 states and 17597 transitions. [2021-06-05 05:32:19,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:32:19,275 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:32:19,275 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:32:19,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:32:19,475 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:32:19,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:32:19,476 INFO L82 PathProgramCache]: Analyzing trace with hash -773898676, now seen corresponding path program 39 times [2021-06-05 05:32:19,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:32:19,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836429360] [2021-06-05 05:32:19,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:32:19,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:32:19,793 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:32:19,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:32:19,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836429360] [2021-06-05 05:32:19,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836429360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:32:19,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162887068] [2021-06-05 05:32:19,794 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 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 05:32:19,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:32:19,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:32:19,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:32:19,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:32:20,050 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:32:20,050 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 27 treesize of output 15 [2021-06-05 05:32:20,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:32:20,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:32:20,058 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 05:32:20,058 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 05:32:20,241 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:32:20,241 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 38 treesize of output 22 [2021-06-05 05:32:20,242 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:32:20,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:32:20,248 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 05:32:20,248 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:20 [2021-06-05 05:32:20,421 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:32:20,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162887068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:32:20,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:32:20,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:32:20,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837795264] [2021-06-05 05:32:20,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:32:20,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:32:20,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:32:20,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1250, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:32:20,422 INFO L87 Difference]: Start difference. First operand 5880 states and 17597 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:32:22,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:32:22,656 INFO L93 Difference]: Finished difference Result 7286 states and 21638 transitions. [2021-06-05 05:32:22,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 05:32:22,657 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:32:22,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:32:22,667 INFO L225 Difference]: With dead ends: 7286 [2021-06-05 05:32:22,667 INFO L226 Difference]: Without dead ends: 7099 [2021-06-05 05:32:22,667 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 1661.1ms TimeCoverageRelationStatistics Valid=234, Invalid=3426, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 05:32:22,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7099 states. [2021-06-05 05:32:22,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7099 to 5901. [2021-06-05 05:32:22,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5901 states, 5900 states have (on average 2.99271186440678) internal successors, (17657), 5900 states have internal predecessors, (17657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:32:22,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5901 states to 5901 states and 17657 transitions. [2021-06-05 05:32:22,748 INFO L78 Accepts]: Start accepts. Automaton has 5901 states and 17657 transitions. Word has length 37 [2021-06-05 05:32:22,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:32:22,748 INFO L482 AbstractCegarLoop]: Abstraction has 5901 states and 17657 transitions. [2021-06-05 05:32:22,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:32:22,748 INFO L276 IsEmpty]: Start isEmpty. Operand 5901 states and 17657 transitions. [2021-06-05 05:32:22,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:32:22,755 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:32:22,755 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:32:22,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:32:22,955 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:32:22,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:32:22,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1340355464, now seen corresponding path program 40 times [2021-06-05 05:32:22,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:32:22,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166568517] [2021-06-05 05:32:22,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:32:22,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:32:23,290 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:32:23,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:32:23,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166568517] [2021-06-05 05:32:23,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166568517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:32:23,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322466707] [2021-06-05 05:32:23,290 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 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 05:32:23,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:32:23,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:32:23,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:32:23,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:32:23,545 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:32:23,545 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 29 treesize of output 13 [2021-06-05 05:32:23,546 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:32:23,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:32:23,552 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 05:32:23,552 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:29 [2021-06-05 05:32:23,776 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:32:23,776 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 30 treesize of output 18 [2021-06-05 05:32:23,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:32:23,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:32:23,783 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 05:32:23,783 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 05:32:23,933 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:32:23,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322466707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:32:23,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:32:23,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:32:23,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681596807] [2021-06-05 05:32:23,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:32:23,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:32:23,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:32:23,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1249, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:32:23,934 INFO L87 Difference]: Start difference. First operand 5901 states and 17657 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:32:26,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:32:26,235 INFO L93 Difference]: Finished difference Result 7167 states and 21271 transitions. [2021-06-05 05:32:26,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:32:26,235 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:32:26,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:32:26,244 INFO L225 Difference]: With dead ends: 7167 [2021-06-05 05:32:26,244 INFO L226 Difference]: Without dead ends: 6967 [2021-06-05 05:32:26,244 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 1687.8ms TimeCoverageRelationStatistics Valid=239, Invalid=3543, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 05:32:26,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6967 states. [2021-06-05 05:32:26,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6967 to 5895. [2021-06-05 05:32:26,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5895 states, 5894 states have (on average 2.993552765524262) internal successors, (17644), 5894 states have internal predecessors, (17644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:32:26,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5895 states to 5895 states and 17644 transitions. [2021-06-05 05:32:26,330 INFO L78 Accepts]: Start accepts. Automaton has 5895 states and 17644 transitions. Word has length 37 [2021-06-05 05:32:26,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:32:26,330 INFO L482 AbstractCegarLoop]: Abstraction has 5895 states and 17644 transitions. [2021-06-05 05:32:26,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:32:26,330 INFO L276 IsEmpty]: Start isEmpty. Operand 5895 states and 17644 transitions. [2021-06-05 05:32:26,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:32:26,337 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:32:26,337 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:32:26,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-06-05 05:32:26,553 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:32:26,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:32:26,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1809079972, now seen corresponding path program 41 times [2021-06-05 05:32:26,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:32:26,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126179186] [2021-06-05 05:32:26,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:32:26,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:32:27,043 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:32:27,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:32:27,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126179186] [2021-06-05 05:32:27,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126179186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:32:27,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538653958] [2021-06-05 05:32:27,043 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 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 05:32:27,129 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:32:27,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:32:27,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 05:32:27,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:32:27,477 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-06-05 05:32:27,574 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:32:27,574 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 27 treesize of output 15 [2021-06-05 05:32:27,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:32:27,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:32:27,583 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 05:32:27,583 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 05:32:27,680 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:32:27,681 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 31 treesize of output 19 [2021-06-05 05:32:27,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:32:27,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:32:27,693 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 05:32:27,693 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:17 [2021-06-05 05:32:27,854 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:32:27,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538653958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:32:27,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:32:27,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-06-05 05:32:27,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463391313] [2021-06-05 05:32:27,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:32:27,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:32:27,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:32:27,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1106, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:32:27,855 INFO L87 Difference]: Start difference. First operand 5895 states and 17644 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 05:32:29,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:32:29,451 INFO L93 Difference]: Finished difference Result 7693 states and 22811 transitions. [2021-06-05 05:32:29,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 05:32:29,451 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 05:32:29,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:32:29,461 INFO L225 Difference]: With dead ends: 7693 [2021-06-05 05:32:29,461 INFO L226 Difference]: Without dead ends: 7471 [2021-06-05 05:32:29,461 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 1526.3ms TimeCoverageRelationStatistics Valid=208, Invalid=2654, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 05:32:29,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7471 states. [2021-06-05 05:32:29,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7471 to 5928. [2021-06-05 05:32:29,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5928 states, 5927 states have (on average 2.9940948203138182) internal successors, (17746), 5927 states have internal predecessors, (17746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:32:29,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5928 states to 5928 states and 17746 transitions. [2021-06-05 05:32:29,542 INFO L78 Accepts]: Start accepts. Automaton has 5928 states and 17746 transitions. Word has length 37 [2021-06-05 05:32:29,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:32:29,542 INFO L482 AbstractCegarLoop]: Abstraction has 5928 states and 17746 transitions. [2021-06-05 05:32:29,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 05:32:29,542 INFO L276 IsEmpty]: Start isEmpty. Operand 5928 states and 17746 transitions. [2021-06-05 05:32:29,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:32:29,549 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:32:29,549 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:32:29,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:32:29,750 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:32:29,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:32:29,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1971085202, now seen corresponding path program 42 times [2021-06-05 05:32:29,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:32:29,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833711583] [2021-06-05 05:32:29,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:32:29,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:32:30,044 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:32:30,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:32:30,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833711583] [2021-06-05 05:32:30,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833711583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:32:30,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443786606] [2021-06-05 05:32:30,045 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 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 05:32:30,074 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:32:30,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:32:30,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:32:30,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:32:30,283 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:32:30,284 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 27 treesize of output 15 [2021-06-05 05:32:30,286 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:32:30,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:32:30,294 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 05:32:30,294 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 05:32:30,470 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:32:30,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 20 [2021-06-05 05:32:30,471 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:32:30,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:32:30,476 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 05:32:30,477 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:20 [2021-06-05 05:32:30,656 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:32:30,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443786606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:32:30,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:32:30,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:32:30,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506148357] [2021-06-05 05:32:30,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:32:30,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:32:30,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:32:30,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1250, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:32:30,658 INFO L87 Difference]: Start difference. First operand 5928 states and 17746 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:32:32,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:32:32,808 INFO L93 Difference]: Finished difference Result 7495 states and 22284 transitions. [2021-06-05 05:32:32,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 05:32:32,808 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:32:32,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:32:32,818 INFO L225 Difference]: With dead ends: 7495 [2021-06-05 05:32:32,818 INFO L226 Difference]: Without dead ends: 7233 [2021-06-05 05:32:32,818 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 1677.5ms TimeCoverageRelationStatistics Valid=248, Invalid=3534, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 05:32:32,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7233 states. [2021-06-05 05:32:32,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7233 to 5931. [2021-06-05 05:32:32,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5931 states, 5930 states have (on average 2.997133220910624) internal successors, (17773), 5930 states have internal predecessors, (17773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:32:32,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5931 states to 5931 states and 17773 transitions. [2021-06-05 05:32:32,898 INFO L78 Accepts]: Start accepts. Automaton has 5931 states and 17773 transitions. Word has length 37 [2021-06-05 05:32:32,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:32:32,898 INFO L482 AbstractCegarLoop]: Abstraction has 5931 states and 17773 transitions. [2021-06-05 05:32:32,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:32:32,898 INFO L276 IsEmpty]: Start isEmpty. Operand 5931 states and 17773 transitions. [2021-06-05 05:32:32,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:32:32,904 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:32:32,904 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:32:33,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-06-05 05:32:33,105 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:32:33,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:32:33,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1806920574, now seen corresponding path program 43 times [2021-06-05 05:32:33,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:32:33,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164018786] [2021-06-05 05:32:33,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:32:33,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:32:33,405 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:32:33,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:32:33,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164018786] [2021-06-05 05:32:33,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164018786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:32:33,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350594354] [2021-06-05 05:32:33,405 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 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 05:32:33,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:32:33,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:32:33,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:32:33,695 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:32:33,695 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 31 treesize of output 19 [2021-06-05 05:32:33,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:32:33,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:32:33,702 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 05:32:33,702 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:28 [2021-06-05 05:32:33,761 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:32:33,761 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 29 treesize of output 17 [2021-06-05 05:32:33,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:32:33,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:32:33,767 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 05:32:33,767 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:17 [2021-06-05 05:32:33,929 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:32:33,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350594354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:32:33,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:32:33,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 33 [2021-06-05 05:32:33,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372723151] [2021-06-05 05:32:33,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 05:32:33,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:32:33,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 05:32:33,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1039, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:32:33,930 INFO L87 Difference]: Start difference. First operand 5931 states and 17773 transitions. Second operand has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 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 05:32:35,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:32:35,572 INFO L93 Difference]: Finished difference Result 7519 states and 22298 transitions. [2021-06-05 05:32:35,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:32:35,572 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 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 05:32:35,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:32:35,582 INFO L225 Difference]: With dead ends: 7519 [2021-06-05 05:32:35,582 INFO L226 Difference]: Without dead ends: 7264 [2021-06-05 05:32:35,583 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 1243.0ms TimeCoverageRelationStatistics Valid=207, Invalid=2549, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 05:32:35,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7264 states. [2021-06-05 05:32:35,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7264 to 6006. [2021-06-05 05:32:35,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6006 states, 6005 states have (on average 3.0) internal successors, (18015), 6005 states have internal predecessors, (18015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:32:35,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6006 states to 6006 states and 18015 transitions. [2021-06-05 05:32:35,666 INFO L78 Accepts]: Start accepts. Automaton has 6006 states and 18015 transitions. Word has length 37 [2021-06-05 05:32:35,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:32:35,666 INFO L482 AbstractCegarLoop]: Abstraction has 6006 states and 18015 transitions. [2021-06-05 05:32:35,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 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 05:32:35,666 INFO L276 IsEmpty]: Start isEmpty. Operand 6006 states and 18015 transitions. [2021-06-05 05:32:35,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:32:35,673 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:32:35,673 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:32:35,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:32:35,873 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:32:35,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:32:35,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1378159546, now seen corresponding path program 44 times [2021-06-05 05:32:35,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:32:35,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660767242] [2021-06-05 05:32:35,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:32:35,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:32:36,180 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:32:36,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:32:36,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660767242] [2021-06-05 05:32:36,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660767242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:32:36,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858620957] [2021-06-05 05:32:36,181 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 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 05:32:36,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:32:36,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:32:36,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:32:36,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:32:36,415 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:32:36,416 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 25 treesize of output 13 [2021-06-05 05:32:36,417 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:32:36,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:32:36,423 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 05:32:36,423 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 05:32:36,592 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:32:36,592 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 29 treesize of output 17 [2021-06-05 05:32:36,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:32:36,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:32:36,598 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 05:32:36,599 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:32:36,811 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:32:36,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858620957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:32:36,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:32:36,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:32:36,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362328222] [2021-06-05 05:32:36,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:32:36,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:32:36,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:32:36,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:32:36,812 INFO L87 Difference]: Start difference. First operand 6006 states and 18015 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:32:38,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:32:38,917 INFO L93 Difference]: Finished difference Result 7310 states and 21710 transitions. [2021-06-05 05:32:38,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:32:38,918 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:32:38,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:32:38,928 INFO L225 Difference]: With dead ends: 7310 [2021-06-05 05:32:38,928 INFO L226 Difference]: Without dead ends: 7120 [2021-06-05 05:32:38,929 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 1593.9ms TimeCoverageRelationStatistics Valid=219, Invalid=3087, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 05:32:38,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7120 states. [2021-06-05 05:32:39,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7120 to 6069. [2021-06-05 05:32:39,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6069 states, 6068 states have (on average 2.9995056031641396) internal successors, (18201), 6068 states have internal predecessors, (18201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:32:39,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6069 states to 6069 states and 18201 transitions. [2021-06-05 05:32:39,017 INFO L78 Accepts]: Start accepts. Automaton has 6069 states and 18201 transitions. Word has length 37 [2021-06-05 05:32:39,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:32:39,017 INFO L482 AbstractCegarLoop]: Abstraction has 6069 states and 18201 transitions. [2021-06-05 05:32:39,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:32:39,017 INFO L276 IsEmpty]: Start isEmpty. Operand 6069 states and 18201 transitions. [2021-06-05 05:32:39,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:32:39,024 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:32:39,024 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:32:39,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-05 05:32:39,225 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:32:39,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:32:39,225 INFO L82 PathProgramCache]: Analyzing trace with hash -366204460, now seen corresponding path program 45 times [2021-06-05 05:32:39,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:32:39,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672747895] [2021-06-05 05:32:39,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:32:39,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:32:39,589 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:32:39,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:32:39,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672747895] [2021-06-05 05:32:39,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672747895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:32:39,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804841697] [2021-06-05 05:32:39,589 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 05:32:39,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:32:39,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:32:39,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:32:39,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:32:39,847 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:32:39,847 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 27 treesize of output 15 [2021-06-05 05:32:39,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:32:39,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:32:39,856 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 05:32:39,856 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 05:32:40,046 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:32:40,047 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 22 [2021-06-05 05:32:40,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:32:40,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:32:40,054 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 05:32:40,054 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:20 [2021-06-05 05:32:40,247 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:32:40,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804841697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:32:40,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:32:40,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:32:40,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315615754] [2021-06-05 05:32:40,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:32:40,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:32:40,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:32:40,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:32:40,249 INFO L87 Difference]: Start difference. First operand 6069 states and 18201 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:32:42,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:32:42,533 INFO L93 Difference]: Finished difference Result 7505 states and 22308 transitions. [2021-06-05 05:32:42,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:32:42,533 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:32:42,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:32:42,543 INFO L225 Difference]: With dead ends: 7505 [2021-06-05 05:32:42,543 INFO L226 Difference]: Without dead ends: 7318 [2021-06-05 05:32:42,543 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 1750.4ms TimeCoverageRelationStatistics Valid=227, Invalid=3313, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 05:32:42,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7318 states. [2021-06-05 05:32:42,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7318 to 6054. [2021-06-05 05:32:42,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6054 states, 6053 states have (on average 2.9986783413183544) internal successors, (18151), 6053 states have internal predecessors, (18151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:32:42,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6054 states to 6054 states and 18151 transitions. [2021-06-05 05:32:42,623 INFO L78 Accepts]: Start accepts. Automaton has 6054 states and 18151 transitions. Word has length 37 [2021-06-05 05:32:42,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:32:42,623 INFO L482 AbstractCegarLoop]: Abstraction has 6054 states and 18151 transitions. [2021-06-05 05:32:42,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:32:42,623 INFO L276 IsEmpty]: Start isEmpty. Operand 6054 states and 18151 transitions. [2021-06-05 05:32:42,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:32:42,630 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:32:42,630 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:32:42,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:32:42,830 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:32:42,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:32:42,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1748049680, now seen corresponding path program 46 times [2021-06-05 05:32:42,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:32:42,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671951471] [2021-06-05 05:32:42,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:32:42,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:32:43,152 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:32:43,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:32:43,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671951471] [2021-06-05 05:32:43,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671951471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:32:43,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430345399] [2021-06-05 05:32:43,152 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 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 05:32:43,179 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:32:43,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:32:43,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:32:43,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:32:43,384 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:32:43,384 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 29 treesize of output 13 [2021-06-05 05:32:43,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:32:43,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:32:43,392 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 05:32:43,392 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:29 [2021-06-05 05:32:43,616 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:32:43,616 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 30 treesize of output 18 [2021-06-05 05:32:43,617 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:32:43,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:32:43,623 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 05:32:43,623 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 05:32:43,795 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:32:43,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430345399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:32:43,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:32:43,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:32:43,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815125207] [2021-06-05 05:32:43,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:32:43,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:32:43,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:32:43,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1251, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:32:43,796 INFO L87 Difference]: Start difference. First operand 6054 states and 18151 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:32:46,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:32:46,136 INFO L93 Difference]: Finished difference Result 7386 states and 21941 transitions. [2021-06-05 05:32:46,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 05:32:46,136 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:32:46,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:32:46,146 INFO L225 Difference]: With dead ends: 7386 [2021-06-05 05:32:46,146 INFO L226 Difference]: Without dead ends: 7186 [2021-06-05 05:32:46,146 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 1632.0ms TimeCoverageRelationStatistics Valid=219, Invalid=3203, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 05:32:46,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7186 states. [2021-06-05 05:32:46,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7186 to 6048. [2021-06-05 05:32:46,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6048 states, 6047 states have (on average 2.999503886224574) internal successors, (18138), 6047 states have internal predecessors, (18138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:32:46,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6048 states to 6048 states and 18138 transitions. [2021-06-05 05:32:46,227 INFO L78 Accepts]: Start accepts. Automaton has 6048 states and 18138 transitions. Word has length 37 [2021-06-05 05:32:46,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:32:46,228 INFO L482 AbstractCegarLoop]: Abstraction has 6048 states and 18138 transitions. [2021-06-05 05:32:46,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:32:46,228 INFO L276 IsEmpty]: Start isEmpty. Operand 6048 states and 18138 transitions. [2021-06-05 05:32:46,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:32:46,234 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:32:46,234 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:32:46,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:32:46,435 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:32:46,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:32:46,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1401385756, now seen corresponding path program 47 times [2021-06-05 05:32:46,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:32:46,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201755602] [2021-06-05 05:32:46,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:32:46,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:32:46,744 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:32:46,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:32:46,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201755602] [2021-06-05 05:32:46,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201755602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:32:46,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192355664] [2021-06-05 05:32:46,745 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 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 05:32:46,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:32:46,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:32:46,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 05:32:46,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:32:46,981 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:32:46,982 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 27 treesize of output 15 [2021-06-05 05:32:46,984 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:32:46,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:32:46,992 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 05:32:46,992 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 05:32:47,112 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:32:47,112 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 29 treesize of output 17 [2021-06-05 05:32:47,113 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:32:47,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:32:47,118 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 05:32:47,118 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:17 [2021-06-05 05:32:47,271 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:32:47,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192355664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:32:47,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:32:47,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-06-05 05:32:47,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307062512] [2021-06-05 05:32:47,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:32:47,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:32:47,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:32:47,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1106, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:32:47,272 INFO L87 Difference]: Start difference. First operand 6048 states and 18138 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 05:32:48,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:32:48,751 INFO L93 Difference]: Finished difference Result 7813 states and 23208 transitions. [2021-06-05 05:32:48,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:32:48,752 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 05:32:48,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:32:48,762 INFO L225 Difference]: With dead ends: 7813 [2021-06-05 05:32:48,762 INFO L226 Difference]: Without dead ends: 7591 [2021-06-05 05:32:48,763 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1231.7ms TimeCoverageRelationStatistics Valid=203, Invalid=2553, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 05:32:48,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7591 states. [2021-06-05 05:32:48,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7591 to 6027. [2021-06-05 05:32:48,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6027 states, 6026 states have (on average 2.9995021573182874) internal successors, (18075), 6026 states have internal predecessors, (18075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:32:48,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6027 states to 6027 states and 18075 transitions. [2021-06-05 05:32:48,845 INFO L78 Accepts]: Start accepts. Automaton has 6027 states and 18075 transitions. Word has length 37 [2021-06-05 05:32:48,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:32:48,845 INFO L482 AbstractCegarLoop]: Abstraction has 6027 states and 18075 transitions. [2021-06-05 05:32:48,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 05:32:48,845 INFO L276 IsEmpty]: Start isEmpty. Operand 6027 states and 18075 transitions. [2021-06-05 05:32:48,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:32:48,852 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:32:48,852 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:32:49,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-06-05 05:32:49,052 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:32:49,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:32:49,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1563390986, now seen corresponding path program 48 times [2021-06-05 05:32:49,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:32:49,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710623381] [2021-06-05 05:32:49,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:32:49,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:32:49,342 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:32:49,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:32:49,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710623381] [2021-06-05 05:32:49,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710623381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:32:49,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523970673] [2021-06-05 05:32:49,343 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 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 05:32:49,370 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:32:49,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:32:49,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:32:49,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:32:49,609 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:32:49,610 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 27 treesize of output 15 [2021-06-05 05:32:49,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:32:49,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:32:49,620 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 05:32:49,620 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 05:32:49,803 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:32:49,803 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 38 treesize of output 22 [2021-06-05 05:32:49,804 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:32:49,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:32:49,810 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 05:32:49,810 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:20 [2021-06-05 05:32:49,989 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:32:49,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523970673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:32:49,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:32:49,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:32:49,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237155323] [2021-06-05 05:32:49,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:32:49,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:32:49,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:32:49,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:32:49,990 INFO L87 Difference]: Start difference. First operand 6027 states and 18075 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:32:52,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:32:52,454 INFO L93 Difference]: Finished difference Result 7640 states and 22718 transitions. [2021-06-05 05:32:52,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:32:52,454 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:32:52,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:32:52,464 INFO L225 Difference]: With dead ends: 7640 [2021-06-05 05:32:52,464 INFO L226 Difference]: Without dead ends: 7381 [2021-06-05 05:32:52,464 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 1750.2ms TimeCoverageRelationStatistics Valid=252, Invalid=3530, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 05:32:52,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7381 states. [2021-06-05 05:32:52,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7381 to 5997. [2021-06-05 05:32:52,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5997 states, 5996 states have (on average 3.0005003335557037) internal successors, (17991), 5996 states have internal predecessors, (17991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:32:52,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5997 states to 5997 states and 17991 transitions. [2021-06-05 05:32:52,542 INFO L78 Accepts]: Start accepts. Automaton has 5997 states and 17991 transitions. Word has length 37 [2021-06-05 05:32:52,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:32:52,543 INFO L482 AbstractCegarLoop]: Abstraction has 5997 states and 17991 transitions. [2021-06-05 05:32:52,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:32:52,543 INFO L276 IsEmpty]: Start isEmpty. Operand 5997 states and 17991 transitions. [2021-06-05 05:32:52,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:32:52,549 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:32:52,549 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:32:52,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:32:52,750 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:32:52,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:32:52,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1176430760, now seen corresponding path program 49 times [2021-06-05 05:32:52,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:32:52,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396927162] [2021-06-05 05:32:52,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:32:52,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:32:53,062 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:32:53,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:32:53,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396927162] [2021-06-05 05:32:53,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396927162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:32:53,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122367192] [2021-06-05 05:32:53,062 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 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 05:32:53,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:32:53,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:32:53,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:32:53,305 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:32:53,305 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 31 treesize of output 15 [2021-06-05 05:32:53,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:32:53,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:32:53,312 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 05:32:53,312 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:25 [2021-06-05 05:32:53,509 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:32:53,509 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 29 treesize of output 17 [2021-06-05 05:32:53,513 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:32:53,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:32:53,519 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 05:32:53,519 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:32:53,707 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:32:53,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122367192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:32:53,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:32:53,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:32:53,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832184022] [2021-06-05 05:32:53,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:32:53,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:32:53,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:32:53,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:32:53,708 INFO L87 Difference]: Start difference. First operand 5997 states and 17991 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:32:55,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:32:55,883 INFO L93 Difference]: Finished difference Result 7271 states and 21602 transitions. [2021-06-05 05:32:55,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 05:32:55,883 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:32:55,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:32:55,893 INFO L225 Difference]: With dead ends: 7271 [2021-06-05 05:32:55,893 INFO L226 Difference]: Without dead ends: 7081 [2021-06-05 05:32:55,894 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 1750.9ms TimeCoverageRelationStatistics Valid=264, Invalid=3396, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 05:32:55,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7081 states. [2021-06-05 05:32:55,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7081 to 6030. [2021-06-05 05:32:55,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6030 states, 6029 states have (on average 3.000995189915409) internal successors, (18093), 6029 states have internal predecessors, (18093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:32:55,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6030 states to 6030 states and 18093 transitions. [2021-06-05 05:32:55,975 INFO L78 Accepts]: Start accepts. Automaton has 6030 states and 18093 transitions. Word has length 37 [2021-06-05 05:32:55,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:32:55,975 INFO L482 AbstractCegarLoop]: Abstraction has 6030 states and 18093 transitions. [2021-06-05 05:32:55,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:32:55,975 INFO L276 IsEmpty]: Start isEmpty. Operand 6030 states and 18093 transitions. [2021-06-05 05:32:55,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:32:55,981 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:32:55,981 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:32:56,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-05 05:32:56,182 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:32:56,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:32:56,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1374172530, now seen corresponding path program 50 times [2021-06-05 05:32:56,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:32:56,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291236669] [2021-06-05 05:32:56,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:32:56,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:32:56,472 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:32:56,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:32:56,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291236669] [2021-06-05 05:32:56,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291236669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:32:56,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197123429] [2021-06-05 05:32:56,472 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 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 05:32:56,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:32:56,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:32:56,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:32:56,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:32:56,674 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:32:56,674 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 27 treesize of output 15 [2021-06-05 05:32:56,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:32:56,680 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:32:56,681 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 05:32:56,681 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 05:32:56,887 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:32:56,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 05:32:56,889 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:32:56,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:32:56,895 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 05:32:56,895 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:32:57,086 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:32:57,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197123429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:32:57,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:32:57,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:32:57,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270390374] [2021-06-05 05:32:57,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:32:57,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:32:57,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:32:57,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:32:57,087 INFO L87 Difference]: Start difference. First operand 6030 states and 18093 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:32:59,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:32:59,236 INFO L93 Difference]: Finished difference Result 7463 states and 22192 transitions. [2021-06-05 05:32:59,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:32:59,236 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:32:59,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:32:59,248 INFO L225 Difference]: With dead ends: 7463 [2021-06-05 05:32:59,248 INFO L226 Difference]: Without dead ends: 7276 [2021-06-05 05:32:59,248 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 1614.2ms TimeCoverageRelationStatistics Valid=223, Invalid=3199, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 05:32:59,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7276 states. [2021-06-05 05:32:59,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7276 to 6015. [2021-06-05 05:32:59,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6015 states, 6014 states have (on average 3.0001662786830727) internal successors, (18043), 6014 states have internal predecessors, (18043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:32:59,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6015 states to 6015 states and 18043 transitions. [2021-06-05 05:32:59,332 INFO L78 Accepts]: Start accepts. Automaton has 6015 states and 18043 transitions. Word has length 37 [2021-06-05 05:32:59,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:32:59,332 INFO L482 AbstractCegarLoop]: Abstraction has 6015 states and 18043 transitions. [2021-06-05 05:32:59,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:32:59,332 INFO L276 IsEmpty]: Start isEmpty. Operand 6015 states and 18043 transitions. [2021-06-05 05:32:59,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:32:59,339 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:32:59,339 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:32:59,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-05 05:32:59,539 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:32:59,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:32:59,540 INFO L82 PathProgramCache]: Analyzing trace with hash -806540626, now seen corresponding path program 51 times [2021-06-05 05:32:59,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:32:59,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451610088] [2021-06-05 05:32:59,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:32:59,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:32:59,853 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:32:59,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:32:59,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451610088] [2021-06-05 05:32:59,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451610088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:32:59,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172131163] [2021-06-05 05:32:59,854 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 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 05:32:59,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:32:59,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:32:59,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:32:59,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:33:00,060 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:33:00,060 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 29 treesize of output 17 [2021-06-05 05:33:00,061 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:33:00,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:33:00,067 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 05:33:00,067 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:24 [2021-06-05 05:33:00,320 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:33:00,320 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 44 treesize of output 24 [2021-06-05 05:33:00,321 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:33:00,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:33:00,327 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 05:33:00,327 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:25 [2021-06-05 05:33:00,470 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:33:00,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172131163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:33:00,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:33:00,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:33:00,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201259957] [2021-06-05 05:33:00,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:33:00,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:33:00,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:33:00,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1251, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:33:00,471 INFO L87 Difference]: Start difference. First operand 6015 states and 18043 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:33:02,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:33:02,875 INFO L93 Difference]: Finished difference Result 7363 states and 21872 transitions. [2021-06-05 05:33:02,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 05:33:02,876 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:33:02,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:33:02,885 INFO L225 Difference]: With dead ends: 7363 [2021-06-05 05:33:02,885 INFO L226 Difference]: Without dead ends: 7163 [2021-06-05 05:33:02,885 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 1727.6ms TimeCoverageRelationStatistics Valid=249, Invalid=3657, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 05:33:02,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7163 states. [2021-06-05 05:33:02,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7163 to 6009. [2021-06-05 05:33:02,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6009 states, 6008 states have (on average 3.0009986684420773) internal successors, (18030), 6008 states have internal predecessors, (18030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:02,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6009 states to 6009 states and 18030 transitions. [2021-06-05 05:33:02,960 INFO L78 Accepts]: Start accepts. Automaton has 6009 states and 18030 transitions. Word has length 37 [2021-06-05 05:33:02,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:33:02,960 INFO L482 AbstractCegarLoop]: Abstraction has 6009 states and 18030 transitions. [2021-06-05 05:33:02,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:33:02,960 INFO L276 IsEmpty]: Start isEmpty. Operand 6009 states and 18030 transitions. [2021-06-05 05:33:02,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:33:02,966 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:33:02,966 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:33:03,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:33:03,167 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:33:03,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:33:03,168 INFO L82 PathProgramCache]: Analyzing trace with hash 338991234, now seen corresponding path program 52 times [2021-06-05 05:33:03,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:33:03,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291391368] [2021-06-05 05:33:03,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:33:03,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:33:03,510 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:33:03,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:33:03,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291391368] [2021-06-05 05:33:03,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291391368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:33:03,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674436865] [2021-06-05 05:33:03,510 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 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 05:33:03,536 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:33:03,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:33:03,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:33:03,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:33:03,710 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:33:03,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2021-06-05 05:33:03,711 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:33:03,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:33:03,717 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 05:33:03,717 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:27 [2021-06-05 05:33:03,938 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:33:03,938 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 29 treesize of output 17 [2021-06-05 05:33:03,939 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:33:03,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:33:03,945 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 05:33:03,945 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:33:04,157 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:33:04,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674436865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:33:04,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:33:04,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:33:04,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486696321] [2021-06-05 05:33:04,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:33:04,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:33:04,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:33:04,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:33:04,158 INFO L87 Difference]: Start difference. First operand 6009 states and 18030 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:33:06,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:33:06,527 INFO L93 Difference]: Finished difference Result 7661 states and 22805 transitions. [2021-06-05 05:33:06,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:33:06,528 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:33:06,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:33:06,538 INFO L225 Difference]: With dead ends: 7661 [2021-06-05 05:33:06,538 INFO L226 Difference]: Without dead ends: 7474 [2021-06-05 05:33:06,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 1734.0ms TimeCoverageRelationStatistics Valid=242, Invalid=3418, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 05:33:06,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7474 states. [2021-06-05 05:33:06,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7474 to 5997. [2021-06-05 05:33:06,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5997 states, 5996 states have (on average 3.0) internal successors, (17988), 5996 states have internal predecessors, (17988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:06,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5997 states to 5997 states and 17988 transitions. [2021-06-05 05:33:06,623 INFO L78 Accepts]: Start accepts. Automaton has 5997 states and 17988 transitions. Word has length 37 [2021-06-05 05:33:06,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:33:06,623 INFO L482 AbstractCegarLoop]: Abstraction has 5997 states and 17988 transitions. [2021-06-05 05:33:06,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:33:06,623 INFO L276 IsEmpty]: Start isEmpty. Operand 5997 states and 17988 transitions. [2021-06-05 05:33:06,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:33:06,630 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:33:06,630 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:33:06,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:33:06,830 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:33:06,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:33:06,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1841721922, now seen corresponding path program 53 times [2021-06-05 05:33:06,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:33:06,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118781288] [2021-06-05 05:33:06,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:33:06,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:33:07,115 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:33:07,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:33:07,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118781288] [2021-06-05 05:33:07,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118781288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:33:07,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924174107] [2021-06-05 05:33:07,115 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 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 05:33:07,145 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:33:07,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:33:07,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 05:33:07,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:33:07,318 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:33:07,318 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 27 treesize of output 15 [2021-06-05 05:33:07,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:33:07,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:33:07,325 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 05:33:07,325 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:25 [2021-06-05 05:33:07,491 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:33:07,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 05:33:07,492 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:33:07,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:33:07,497 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 05:33:07,497 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:17 [2021-06-05 05:33:07,650 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:33:07,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924174107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:33:07,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:33:07,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-06-05 05:33:07,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675999745] [2021-06-05 05:33:07,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:33:07,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:33:07,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:33:07,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1106, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:33:07,651 INFO L87 Difference]: Start difference. First operand 5997 states and 17988 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 05:33:09,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:33:09,310 INFO L93 Difference]: Finished difference Result 7627 states and 22648 transitions. [2021-06-05 05:33:09,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:33:09,314 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 05:33:09,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:33:09,324 INFO L225 Difference]: With dead ends: 7627 [2021-06-05 05:33:09,324 INFO L226 Difference]: Without dead ends: 7411 [2021-06-05 05:33:09,324 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1313.7ms TimeCoverageRelationStatistics Valid=220, Invalid=2642, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 05:33:09,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7411 states. [2021-06-05 05:33:09,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7411 to 6054. [2021-06-05 05:33:09,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6054 states, 6053 states have (on average 3.000165207335206) internal successors, (18160), 6053 states have internal predecessors, (18160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:09,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6054 states to 6054 states and 18160 transitions. [2021-06-05 05:33:09,402 INFO L78 Accepts]: Start accepts. Automaton has 6054 states and 18160 transitions. Word has length 37 [2021-06-05 05:33:09,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:33:09,402 INFO L482 AbstractCegarLoop]: Abstraction has 6054 states and 18160 transitions. [2021-06-05 05:33:09,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 05:33:09,402 INFO L276 IsEmpty]: Start isEmpty. Operand 6054 states and 18160 transitions. [2021-06-05 05:33:09,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:33:09,409 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:33:09,409 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:33:09,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:33:09,609 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:33:09,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:33:09,610 INFO L82 PathProgramCache]: Analyzing trace with hash 176986004, now seen corresponding path program 54 times [2021-06-05 05:33:09,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:33:09,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647633347] [2021-06-05 05:33:09,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:33:09,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:33:09,879 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:33:09,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:33:09,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647633347] [2021-06-05 05:33:09,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647633347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:33:09,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214323273] [2021-06-05 05:33:09,879 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 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 05:33:09,906 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:33:09,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:33:09,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:33:09,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:33:10,105 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:33:10,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 05:33:10,106 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:33:10,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:33:10,112 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 05:33:10,112 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:25 [2021-06-05 05:33:10,316 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:33:10,316 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 36 treesize of output 20 [2021-06-05 05:33:10,317 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:33:10,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:33:10,322 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 05:33:10,323 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:20 [2021-06-05 05:33:10,499 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:33:10,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214323273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:33:10,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:33:10,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:33:10,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471630253] [2021-06-05 05:33:10,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:33:10,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:33:10,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:33:10,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:33:10,500 INFO L87 Difference]: Start difference. First operand 6054 states and 18160 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:33:12,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:33:12,729 INFO L93 Difference]: Finished difference Result 7609 states and 22651 transitions. [2021-06-05 05:33:12,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:33:12,729 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:33:12,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:33:12,738 INFO L225 Difference]: With dead ends: 7609 [2021-06-05 05:33:12,738 INFO L226 Difference]: Without dead ends: 7359 [2021-06-05 05:33:12,739 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 1690.8ms TimeCoverageRelationStatistics Valid=254, Invalid=3406, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 05:33:12,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7359 states. [2021-06-05 05:33:12,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7359 to 6003. [2021-06-05 05:33:12,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6003 states, 6002 states have (on average 3.002832389203599) internal successors, (18023), 6002 states have internal predecessors, (18023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:12,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6003 states to 6003 states and 18023 transitions. [2021-06-05 05:33:12,814 INFO L78 Accepts]: Start accepts. Automaton has 6003 states and 18023 transitions. Word has length 37 [2021-06-05 05:33:12,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:33:12,815 INFO L482 AbstractCegarLoop]: Abstraction has 6003 states and 18023 transitions. [2021-06-05 05:33:12,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:33:12,815 INFO L276 IsEmpty]: Start isEmpty. Operand 6003 states and 18023 transitions. [2021-06-05 05:33:12,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:33:12,821 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:33:12,821 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:33:13,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-06-05 05:33:13,022 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:33:13,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:33:13,022 INFO L82 PathProgramCache]: Analyzing trace with hash -956005634, now seen corresponding path program 55 times [2021-06-05 05:33:13,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:33:13,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228207851] [2021-06-05 05:33:13,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:33:13,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:33:13,305 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:33:13,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:33:13,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228207851] [2021-06-05 05:33:13,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228207851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:33:13,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452652099] [2021-06-05 05:33:13,306 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 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 05:33:13,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:33:13,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:33:13,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:33:13,522 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:33:13,522 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 27 treesize of output 15 [2021-06-05 05:33:13,523 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:33:13,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:33:13,529 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 05:33:13,529 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 05:33:13,739 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:33:13,739 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 29 treesize of output 17 [2021-06-05 05:33:13,740 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:33:13,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:33:13,746 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 05:33:13,746 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:33:13,936 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:33:13,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452652099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:33:13,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:33:13,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:33:13,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590033377] [2021-06-05 05:33:13,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:33:13,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:33:13,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:33:13,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:33:13,937 INFO L87 Difference]: Start difference. First operand 6003 states and 18023 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:33:16,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:33:16,451 INFO L93 Difference]: Finished difference Result 7853 states and 23572 transitions. [2021-06-05 05:33:16,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 05:33:16,451 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:33:16,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:33:16,461 INFO L225 Difference]: With dead ends: 7853 [2021-06-05 05:33:16,462 INFO L226 Difference]: Without dead ends: 7774 [2021-06-05 05:33:16,462 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 1780.3ms TimeCoverageRelationStatistics Valid=258, Invalid=3524, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 05:33:16,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7774 states. [2021-06-05 05:33:16,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7774 to 5995. [2021-06-05 05:33:16,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5995 states, 5994 states have (on average 3.002836169502836) internal successors, (17999), 5994 states have internal predecessors, (17999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:16,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5995 states to 5995 states and 17999 transitions. [2021-06-05 05:33:16,547 INFO L78 Accepts]: Start accepts. Automaton has 5995 states and 17999 transitions. Word has length 37 [2021-06-05 05:33:16,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:33:16,547 INFO L482 AbstractCegarLoop]: Abstraction has 5995 states and 17999 transitions. [2021-06-05 05:33:16,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:33:16,547 INFO L276 IsEmpty]: Start isEmpty. Operand 5995 states and 17999 transitions. [2021-06-05 05:33:16,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:33:16,553 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:33:16,553 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:33:16,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:33:16,754 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:33:16,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:33:16,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1158248506, now seen corresponding path program 56 times [2021-06-05 05:33:16,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:33:16,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90676166] [2021-06-05 05:33:16,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:33:16,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:33:17,031 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:33:17,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:33:17,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90676166] [2021-06-05 05:33:17,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90676166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:33:17,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835221710] [2021-06-05 05:33:17,031 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 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 05:33:17,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:33:17,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:33:17,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:33:17,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:33:17,311 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:33:17,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 05:33:17,313 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:33:17,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:33:17,318 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 05:33:17,319 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:25 [2021-06-05 05:33:17,571 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:33:17,571 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 30 treesize of output 18 [2021-06-05 05:33:17,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:33:17,577 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:33:17,577 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 05:33:17,578 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 05:33:17,735 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:33:17,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835221710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:33:17,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:33:17,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:33:17,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231971004] [2021-06-05 05:33:17,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:33:17,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:33:17,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:33:17,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1251, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:33:17,736 INFO L87 Difference]: Start difference. First operand 5995 states and 17999 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:33:20,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:33:20,363 INFO L93 Difference]: Finished difference Result 8024 states and 24069 transitions. [2021-06-05 05:33:20,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 05:33:20,364 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:33:20,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:33:20,375 INFO L225 Difference]: With dead ends: 8024 [2021-06-05 05:33:20,376 INFO L226 Difference]: Without dead ends: 7945 [2021-06-05 05:33:20,376 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 1869.6ms TimeCoverageRelationStatistics Valid=283, Invalid=3749, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 05:33:20,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7945 states. [2021-06-05 05:33:20,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7945 to 5992. [2021-06-05 05:33:20,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5992 states, 5991 states have (on average 3.0030045067601403) internal successors, (17991), 5991 states have internal predecessors, (17991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:20,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5992 states to 5992 states and 17991 transitions. [2021-06-05 05:33:20,476 INFO L78 Accepts]: Start accepts. Automaton has 5992 states and 17991 transitions. Word has length 37 [2021-06-05 05:33:20,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:33:20,476 INFO L482 AbstractCegarLoop]: Abstraction has 5992 states and 17991 transitions. [2021-06-05 05:33:20,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:33:20,477 INFO L276 IsEmpty]: Start isEmpty. Operand 5992 states and 17991 transitions. [2021-06-05 05:33:20,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:33:20,483 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:33:20,484 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:33:20,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-05 05:33:20,684 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:33:20,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:33:20,685 INFO L82 PathProgramCache]: Analyzing trace with hash -48622644, now seen corresponding path program 57 times [2021-06-05 05:33:20,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:33:20,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695451293] [2021-06-05 05:33:20,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:33:20,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:33:20,971 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:33:20,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:33:20,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695451293] [2021-06-05 05:33:20,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695451293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:33:20,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681903804] [2021-06-05 05:33:20,971 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 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 05:33:20,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:33:20,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:33:21,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:33:21,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:33:21,177 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:33:21,177 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 27 treesize of output 15 [2021-06-05 05:33:21,178 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:33:21,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:33:21,184 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 05:33:21,184 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:25 [2021-06-05 05:33:21,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:33:21,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:33:21,592 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 35 treesize of output 25 [2021-06-05 05:33:21,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:33:21,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:33:21,603 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:33:21,603 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:59, output treesize:23 [2021-06-05 05:33:21,762 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:33:21,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681903804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:33:21,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:33:21,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:33:21,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456753902] [2021-06-05 05:33:21,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:33:21,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:33:21,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:33:21,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1253, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:33:21,763 INFO L87 Difference]: Start difference. First operand 5992 states and 17991 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:33:24,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:33:24,456 INFO L93 Difference]: Finished difference Result 7723 states and 23124 transitions. [2021-06-05 05:33:24,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:33:24,457 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:33:24,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:33:24,467 INFO L225 Difference]: With dead ends: 7723 [2021-06-05 05:33:24,467 INFO L226 Difference]: Without dead ends: 7644 [2021-06-05 05:33:24,467 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 2057.8ms TimeCoverageRelationStatistics Valid=247, Invalid=3293, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 05:33:24,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7644 states. [2021-06-05 05:33:24,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7644 to 5992. [2021-06-05 05:33:24,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5992 states, 5991 states have (on average 3.0030045067601403) internal successors, (17991), 5991 states have internal predecessors, (17991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:24,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5992 states to 5992 states and 17991 transitions. [2021-06-05 05:33:24,548 INFO L78 Accepts]: Start accepts. Automaton has 5992 states and 17991 transitions. Word has length 37 [2021-06-05 05:33:24,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:33:24,548 INFO L482 AbstractCegarLoop]: Abstraction has 5992 states and 17991 transitions. [2021-06-05 05:33:24,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:33:24,549 INFO L276 IsEmpty]: Start isEmpty. Operand 5992 states and 17991 transitions. [2021-06-05 05:33:24,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:33:24,555 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:33:24,555 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:33:24,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 05:33:24,756 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:33:24,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:33:24,756 INFO L82 PathProgramCache]: Analyzing trace with hash -673013410, now seen corresponding path program 58 times [2021-06-05 05:33:24,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:33:24,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523571982] [2021-06-05 05:33:24,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:33:24,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:33:25,186 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:33:25,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:33:25,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523571982] [2021-06-05 05:33:25,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523571982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:33:25,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113242564] [2021-06-05 05:33:25,186 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 05:33:25,213 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:33:25,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:33:25,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:33:25,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:33:25,528 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:33:25,529 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 25 treesize of output 13 [2021-06-05 05:33:25,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:33:25,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:33:25,536 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 05:33:25,536 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 05:33:25,600 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:33:25,601 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 29 treesize of output 17 [2021-06-05 05:33:25,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:33:25,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:33:25,607 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 05:33:25,607 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:33:25,785 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:33:25,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113242564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:33:25,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:33:25,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 37 [2021-06-05 05:33:25,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488568318] [2021-06-05 05:33:25,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:33:25,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:33:25,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:33:25,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1290, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:33:25,786 INFO L87 Difference]: Start difference. First operand 5992 states and 17991 transitions. Second operand has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 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 05:33:30,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:33:30,863 INFO L93 Difference]: Finished difference Result 15123 states and 44674 transitions. [2021-06-05 05:33:30,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-06-05 05:33:30,863 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 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 05:33:30,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:33:30,884 INFO L225 Difference]: With dead ends: 15123 [2021-06-05 05:33:30,884 INFO L226 Difference]: Without dead ends: 14752 [2021-06-05 05:33:30,885 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4647 ImplicationChecksByTransitivity, 4097.2ms TimeCoverageRelationStatistics Valid=1442, Invalid=13810, Unknown=0, NotChecked=0, Total=15252 [2021-06-05 05:33:30,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14752 states. [2021-06-05 05:33:31,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14752 to 6984. [2021-06-05 05:33:31,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6984 states, 6983 states have (on average 3.0221967635686666) internal successors, (21104), 6983 states have internal predecessors, (21104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:31,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6984 states to 6984 states and 21104 transitions. [2021-06-05 05:33:31,045 INFO L78 Accepts]: Start accepts. Automaton has 6984 states and 21104 transitions. Word has length 37 [2021-06-05 05:33:31,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:33:31,045 INFO L482 AbstractCegarLoop]: Abstraction has 6984 states and 21104 transitions. [2021-06-05 05:33:31,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 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 05:33:31,045 INFO L276 IsEmpty]: Start isEmpty. Operand 6984 states and 21104 transitions. [2021-06-05 05:33:31,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:33:31,053 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:33:31,053 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:33:31,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-05 05:33:31,254 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:33:31,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:33:31,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1023292830, now seen corresponding path program 59 times [2021-06-05 05:33:31,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:33:31,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116706530] [2021-06-05 05:33:31,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:33:31,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:33:31,608 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:33:31,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:33:31,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116706530] [2021-06-05 05:33:31,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116706530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:33:31,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136512948] [2021-06-05 05:33:31,609 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 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 05:33:31,636 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:33:31,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:33:31,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 05:33:31,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:33:31,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:33:31,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:33:32,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:33:32,001 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 25 treesize of output 13 [2021-06-05 05:33:32,001 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:33:32,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:33:32,011 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 05:33:32,011 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:55, output treesize:29 [2021-06-05 05:33:32,083 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:33:32,083 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 29 treesize of output 17 [2021-06-05 05:33:32,084 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:33:32,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:33:32,089 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 05:33:32,089 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:33:32,286 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:33:32,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136512948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:33:32,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:33:32,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:33:32,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229770433] [2021-06-05 05:33:32,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:33:32,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:33:32,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:33:32,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1245, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:33:32,287 INFO L87 Difference]: Start difference. First operand 6984 states and 21104 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:33:36,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:33:36,736 INFO L93 Difference]: Finished difference Result 11739 states and 35096 transitions. [2021-06-05 05:33:36,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 05:33:36,736 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:33:36,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:33:36,750 INFO L225 Difference]: With dead ends: 11739 [2021-06-05 05:33:36,750 INFO L226 Difference]: Without dead ends: 11268 [2021-06-05 05:33:36,751 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1869 ImplicationChecksByTransitivity, 2792.8ms TimeCoverageRelationStatistics Valid=463, Invalid=7369, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 05:33:36,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11268 states. [2021-06-05 05:33:36,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11268 to 7469. [2021-06-05 05:33:36,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7469 states, 7468 states have (on average 3.0265131226566684) internal successors, (22602), 7468 states have internal predecessors, (22602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:36,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7469 states to 7469 states and 22602 transitions. [2021-06-05 05:33:36,861 INFO L78 Accepts]: Start accepts. Automaton has 7469 states and 22602 transitions. Word has length 37 [2021-06-05 05:33:36,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:33:36,861 INFO L482 AbstractCegarLoop]: Abstraction has 7469 states and 22602 transitions. [2021-06-05 05:33:36,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:33:36,861 INFO L276 IsEmpty]: Start isEmpty. Operand 7469 states and 22602 transitions. [2021-06-05 05:33:36,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:33:36,868 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:33:36,868 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:33:37,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:33:37,070 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:33:37,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:33:37,070 INFO L82 PathProgramCache]: Analyzing trace with hash -786061334, now seen corresponding path program 60 times [2021-06-05 05:33:37,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:33:37,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635410723] [2021-06-05 05:33:37,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:33:37,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:33:37,405 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:33:37,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:33:37,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635410723] [2021-06-05 05:33:37,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635410723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:33:37,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261533874] [2021-06-05 05:33:37,406 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 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 05:33:37,433 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:33:37,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:33:37,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:33:37,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:33:37,746 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:33:37,746 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 31 treesize of output 19 [2021-06-05 05:33:37,747 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:33:37,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:33:37,754 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 05:33:37,754 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:37 [2021-06-05 05:33:37,825 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:33:37,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 23 [2021-06-05 05:33:37,826 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:33:37,831 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:33:37,832 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 05:33:37,832 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:20 [2021-06-05 05:33:38,002 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:33:38,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261533874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:33:38,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:33:38,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:33:38,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71343514] [2021-06-05 05:33:38,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:33:38,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:33:38,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:33:38,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1245, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:33:38,003 INFO L87 Difference]: Start difference. First operand 7469 states and 22602 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:33:40,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:33:40,756 INFO L93 Difference]: Finished difference Result 10651 states and 31890 transitions. [2021-06-05 05:33:40,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 05:33:40,756 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:33:40,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:33:40,770 INFO L225 Difference]: With dead ends: 10651 [2021-06-05 05:33:40,771 INFO L226 Difference]: Without dead ends: 10387 [2021-06-05 05:33:40,771 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 1885.9ms TimeCoverageRelationStatistics Valid=283, Invalid=4007, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 05:33:40,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10387 states. [2021-06-05 05:33:40,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10387 to 7433. [2021-06-05 05:33:40,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7433 states, 7432 states have (on average 3.0278525296017222) internal successors, (22503), 7432 states have internal predecessors, (22503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:40,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7433 states to 7433 states and 22503 transitions. [2021-06-05 05:33:40,885 INFO L78 Accepts]: Start accepts. Automaton has 7433 states and 22503 transitions. Word has length 37 [2021-06-05 05:33:40,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:33:40,885 INFO L482 AbstractCegarLoop]: Abstraction has 7433 states and 22503 transitions. [2021-06-05 05:33:40,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:33:40,886 INFO L276 IsEmpty]: Start isEmpty. Operand 7433 states and 22503 transitions. [2021-06-05 05:33:40,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:33:40,894 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:33:40,894 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:33:41,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:33:41,094 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:33:41,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:33:41,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1016751930, now seen corresponding path program 61 times [2021-06-05 05:33:41,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:33:41,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369483460] [2021-06-05 05:33:41,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:33:41,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:33:41,441 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:33:41,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:33:41,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369483460] [2021-06-05 05:33:41,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369483460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:33:41,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315310863] [2021-06-05 05:33:41,442 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 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 05:33:41,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:33:41,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:33:41,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:33:41,755 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:33:41,755 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 25 treesize of output 13 [2021-06-05 05:33:41,756 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:33:41,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:33:41,762 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 05:33:41,762 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 05:33:41,839 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:33:41,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 05:33:41,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:33:41,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:33:41,846 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 05:33:41,846 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:33:42,006 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:33:42,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315310863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:33:42,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:33:42,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:33:42,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63774644] [2021-06-05 05:33:42,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:33:42,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:33:42,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:33:42,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1223, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:33:42,007 INFO L87 Difference]: Start difference. First operand 7433 states and 22503 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:33:44,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:33:44,386 INFO L93 Difference]: Finished difference Result 11447 states and 33952 transitions. [2021-06-05 05:33:44,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 05:33:44,386 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:33:44,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:33:44,401 INFO L225 Difference]: With dead ends: 11447 [2021-06-05 05:33:44,401 INFO L226 Difference]: Without dead ends: 11273 [2021-06-05 05:33:44,402 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1438 ImplicationChecksByTransitivity, 2236.6ms TimeCoverageRelationStatistics Valid=584, Invalid=5422, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 05:33:44,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11273 states. [2021-06-05 05:33:44,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11273 to 7538. [2021-06-05 05:33:44,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7538 states, 7537 states have (on average 3.02162664189996) internal successors, (22774), 7537 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 05:33:44,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7538 states to 7538 states and 22774 transitions. [2021-06-05 05:33:44,518 INFO L78 Accepts]: Start accepts. Automaton has 7538 states and 22774 transitions. Word has length 37 [2021-06-05 05:33:44,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:33:44,518 INFO L482 AbstractCegarLoop]: Abstraction has 7538 states and 22774 transitions. [2021-06-05 05:33:44,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:33:44,518 INFO L276 IsEmpty]: Start isEmpty. Operand 7538 states and 22774 transitions. [2021-06-05 05:33:44,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:33:44,527 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:33:44,527 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:33:44,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-05 05:33:44,728 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:33:44,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:33:44,729 INFO L82 PathProgramCache]: Analyzing trace with hash 679554310, now seen corresponding path program 62 times [2021-06-05 05:33:44,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:33:44,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131591779] [2021-06-05 05:33:44,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:33:44,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:33:45,044 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:33:45,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:33:45,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131591779] [2021-06-05 05:33:45,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131591779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:33:45,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938230074] [2021-06-05 05:33:45,044 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 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 05:33:45,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:33:45,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:33:45,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:33:45,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:33:45,365 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:33:45,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 05:33:45,366 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:33:45,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:33:45,373 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 05:33:45,373 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 05:33:45,441 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:33:45,441 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 29 treesize of output 17 [2021-06-05 05:33:45,442 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:33:45,447 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:33:45,448 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 05:33:45,448 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:33:45,634 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:33:45,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938230074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:33:45,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:33:45,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2021-06-05 05:33:45,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402466736] [2021-06-05 05:33:45,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:33:45,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:33:45,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:33:45,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1176, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:33:45,635 INFO L87 Difference]: Start difference. First operand 7538 states and 22774 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 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 05:33:47,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:33:47,669 INFO L93 Difference]: Finished difference Result 9009 states and 27002 transitions. [2021-06-05 05:33:47,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 05:33:47,670 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 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 05:33:47,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:33:47,682 INFO L225 Difference]: With dead ends: 9009 [2021-06-05 05:33:47,683 INFO L226 Difference]: Without dead ends: 8777 [2021-06-05 05:33:47,683 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1596.5ms TimeCoverageRelationStatistics Valid=235, Invalid=3187, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 05:33:47,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8777 states. [2021-06-05 05:33:47,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8777 to 7508. [2021-06-05 05:33:47,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7508 states, 7507 states have (on average 3.026775009990675) internal successors, (22722), 7507 states have internal predecessors, (22722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:47,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7508 states to 7508 states and 22722 transitions. [2021-06-05 05:33:47,790 INFO L78 Accepts]: Start accepts. Automaton has 7508 states and 22722 transitions. Word has length 37 [2021-06-05 05:33:47,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:33:47,790 INFO L482 AbstractCegarLoop]: Abstraction has 7508 states and 22722 transitions. [2021-06-05 05:33:47,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 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 05:33:47,790 INFO L276 IsEmpty]: Start isEmpty. Operand 7508 states and 22722 transitions. [2021-06-05 05:33:47,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:33:47,798 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:33:47,798 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:33:47,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-05 05:33:47,999 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:33:47,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:33:47,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1445512958, now seen corresponding path program 63 times [2021-06-05 05:33:47,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:33:47,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250313295] [2021-06-05 05:33:47,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:33:48,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:33:48,314 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:33:48,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:33:48,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250313295] [2021-06-05 05:33:48,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250313295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:33:48,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959466334] [2021-06-05 05:33:48,314 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 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 05:33:48,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:33:48,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:33:48,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:33:48,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:33:48,544 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:33:48,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 05:33:48,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:33:48,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:33:48,556 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 05:33:48,556 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 05:33:48,741 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:33:48,741 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 29 treesize of output 17 [2021-06-05 05:33:48,742 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:33:48,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:33:48,747 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 05:33:48,747 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:33:48,911 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:33:48,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959466334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:33:48,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:33:48,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:33:48,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284642594] [2021-06-05 05:33:48,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:33:48,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:33:48,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:33:48,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1229, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:33:48,913 INFO L87 Difference]: Start difference. First operand 7508 states and 22722 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:33:52,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:33:52,161 INFO L93 Difference]: Finished difference Result 12734 states and 37798 transitions. [2021-06-05 05:33:52,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 05:33:52,161 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:33:52,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:33:52,180 INFO L225 Difference]: With dead ends: 12734 [2021-06-05 05:33:52,180 INFO L226 Difference]: Without dead ends: 12455 [2021-06-05 05:33:52,181 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1681 ImplicationChecksByTransitivity, 2678.6ms TimeCoverageRelationStatistics Valid=653, Invalid=6319, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 05:33:52,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12455 states. [2021-06-05 05:33:52,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12455 to 7592. [2021-06-05 05:33:52,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7592 states, 7591 states have (on average 3.0243709656171784) internal successors, (22958), 7591 states have internal predecessors, (22958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:52,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7592 states to 7592 states and 22958 transitions. [2021-06-05 05:33:52,313 INFO L78 Accepts]: Start accepts. Automaton has 7592 states and 22958 transitions. Word has length 37 [2021-06-05 05:33:52,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:33:52,313 INFO L482 AbstractCegarLoop]: Abstraction has 7592 states and 22958 transitions. [2021-06-05 05:33:52,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:33:52,313 INFO L276 IsEmpty]: Start isEmpty. Operand 7592 states and 22958 transitions. [2021-06-05 05:33:52,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:33:52,322 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:33:52,322 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:33:52,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:33:52,522 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:33:52,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:33:52,523 INFO L82 PathProgramCache]: Analyzing trace with hash 250793282, now seen corresponding path program 64 times [2021-06-05 05:33:52,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:33:52,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656135973] [2021-06-05 05:33:52,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:33:52,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:33:52,911 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:33:52,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:33:52,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656135973] [2021-06-05 05:33:52,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656135973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:33:52,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779277385] [2021-06-05 05:33:52,911 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 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 05:33:52,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:33:52,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:33:52,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:33:52,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:33:53,174 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:33:53,175 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 31 treesize of output 15 [2021-06-05 05:33:53,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:33:53,182 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:33:53,182 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 05:33:53,182 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:32 [2021-06-05 05:33:53,351 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:33:53,351 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 29 treesize of output 17 [2021-06-05 05:33:53,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:33:53,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:33:53,358 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 05:33:53,358 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:33:53,552 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:33:53,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779277385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:33:53,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:33:53,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:33:53,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593818822] [2021-06-05 05:33:53,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:33:53,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:33:53,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:33:53,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1249, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:33:53,553 INFO L87 Difference]: Start difference. First operand 7592 states and 22958 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:33:55,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:33:55,906 INFO L93 Difference]: Finished difference Result 9142 states and 27401 transitions. [2021-06-05 05:33:55,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:33:55,906 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:33:55,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:33:55,917 INFO L225 Difference]: With dead ends: 9142 [2021-06-05 05:33:55,918 INFO L226 Difference]: Without dead ends: 8975 [2021-06-05 05:33:55,918 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 1782.8ms TimeCoverageRelationStatistics Valid=249, Invalid=3533, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 05:33:55,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8975 states. [2021-06-05 05:33:55,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8975 to 7577. [2021-06-05 05:33:55,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7577 states, 7576 states have (on average 3.0258711721224922) internal successors, (22924), 7576 states have internal predecessors, (22924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:56,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7577 states to 7577 states and 22924 transitions. [2021-06-05 05:33:56,052 INFO L78 Accepts]: Start accepts. Automaton has 7577 states and 22924 transitions. Word has length 37 [2021-06-05 05:33:56,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:33:56,052 INFO L482 AbstractCegarLoop]: Abstraction has 7577 states and 22924 transitions. [2021-06-05 05:33:56,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:33:56,053 INFO L276 IsEmpty]: Start isEmpty. Operand 7577 states and 22924 transitions. [2021-06-05 05:33:56,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:33:56,061 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:33:56,061 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:33:56,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-05 05:33:56,262 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:33:56,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:33:56,262 INFO L82 PathProgramCache]: Analyzing trace with hash 785550070, now seen corresponding path program 65 times [2021-06-05 05:33:56,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:33:56,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995567205] [2021-06-05 05:33:56,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:33:56,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:33:56,605 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:33:56,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:33:56,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995567205] [2021-06-05 05:33:56,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995567205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:33:56,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995159583] [2021-06-05 05:33:56,606 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 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 05:33:56,632 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:33:56,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:33:56,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:33:56,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:33:56,832 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:33:56,832 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 27 treesize of output 15 [2021-06-05 05:33:56,833 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:33:56,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:33:56,840 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 05:33:56,840 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 05:33:56,929 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:33:56,929 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 31 treesize of output 19 [2021-06-05 05:33:56,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:33:56,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:33:56,934 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 05:33:56,934 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:17 [2021-06-05 05:33:57,078 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:33:57,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995159583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:33:57,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:33:57,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-06-05 05:33:57,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680605681] [2021-06-05 05:33:57,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:33:57,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:33:57,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:33:57,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1102, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:33:57,079 INFO L87 Difference]: Start difference. First operand 7577 states and 22924 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 05:33:58,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:33:58,784 INFO L93 Difference]: Finished difference Result 11020 states and 32999 transitions. [2021-06-05 05:33:58,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 05:33:58,784 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 05:33:58,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:33:58,797 INFO L225 Difference]: With dead ends: 11020 [2021-06-05 05:33:58,797 INFO L226 Difference]: Without dead ends: 10795 [2021-06-05 05:33:58,797 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 1357.9ms TimeCoverageRelationStatistics Valid=249, Invalid=2943, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 05:33:58,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10795 states. [2021-06-05 05:33:58,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10795 to 7607. [2021-06-05 05:33:58,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7607 states, 7606 states have (on average 3.0262950302392846) internal successors, (23018), 7606 states have internal predecessors, (23018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:33:58,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7607 states to 7607 states and 23018 transitions. [2021-06-05 05:33:58,915 INFO L78 Accepts]: Start accepts. Automaton has 7607 states and 23018 transitions. Word has length 37 [2021-06-05 05:33:58,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:33:58,916 INFO L482 AbstractCegarLoop]: Abstraction has 7607 states and 23018 transitions. [2021-06-05 05:33:58,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 05:33:58,916 INFO L276 IsEmpty]: Start isEmpty. Operand 7607 states and 23018 transitions. [2021-06-05 05:33:58,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:33:58,923 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:33:58,923 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:33:59,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:33:59,124 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:33:59,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:33:59,124 INFO L82 PathProgramCache]: Analyzing trace with hash -92096194, now seen corresponding path program 66 times [2021-06-05 05:33:59,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:33:59,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662292104] [2021-06-05 05:33:59,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:33:59,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:33:59,448 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:33:59,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:33:59,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662292104] [2021-06-05 05:33:59,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662292104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:33:59,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731505797] [2021-06-05 05:33:59,449 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 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 05:33:59,480 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:33:59,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:33:59,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 05:33:59,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:33:59,675 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:33:59,675 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 27 treesize of output 15 [2021-06-05 05:33:59,676 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:33:59,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:33:59,683 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 05:33:59,683 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 05:33:59,845 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:33:59,845 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 36 treesize of output 20 [2021-06-05 05:33:59,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:33:59,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:33:59,852 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 05:33:59,852 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:20 [2021-06-05 05:34:00,020 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:34:00,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731505797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:34:00,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:34:00,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:34:00,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128297315] [2021-06-05 05:34:00,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:34:00,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:34:00,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:34:00,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1232, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:34:00,021 INFO L87 Difference]: Start difference. First operand 7607 states and 23018 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:34:02,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:34:02,560 INFO L93 Difference]: Finished difference Result 10794 states and 31781 transitions. [2021-06-05 05:34:02,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 05:34:02,561 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:34:02,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:34:02,574 INFO L225 Difference]: With dead ends: 10794 [2021-06-05 05:34:02,574 INFO L226 Difference]: Without dead ends: 10591 [2021-06-05 05:34:02,575 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1391 ImplicationChecksByTransitivity, 2283.7ms TimeCoverageRelationStatistics Valid=551, Invalid=5769, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 05:34:02,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10591 states. [2021-06-05 05:34:02,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10591 to 7648. [2021-06-05 05:34:02,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7648 states, 7647 states have (on average 3.024192493788414) internal successors, (23126), 7647 states have internal predecessors, (23126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:34:02,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7648 states to 7648 states and 23126 transitions. [2021-06-05 05:34:02,683 INFO L78 Accepts]: Start accepts. Automaton has 7648 states and 23126 transitions. Word has length 37 [2021-06-05 05:34:02,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:34:02,683 INFO L482 AbstractCegarLoop]: Abstraction has 7648 states and 23126 transitions. [2021-06-05 05:34:02,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:34:02,683 INFO L276 IsEmpty]: Start isEmpty. Operand 7648 states and 23126 transitions. [2021-06-05 05:34:02,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:34:02,691 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:34:02,691 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:34:02,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable121 [2021-06-05 05:34:02,892 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:34:02,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:34:02,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1604210046, now seen corresponding path program 67 times [2021-06-05 05:34:02,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:34:02,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963525540] [2021-06-05 05:34:02,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:34:02,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:34:03,208 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:34:03,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:34:03,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963525540] [2021-06-05 05:34:03,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963525540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:34:03,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424940655] [2021-06-05 05:34:03,209 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 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 05:34:03,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:34:03,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:34:03,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:34:03,443 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:34:03,444 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 29 treesize of output 13 [2021-06-05 05:34:03,444 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:34:03,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:34:03,452 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 05:34:03,452 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:29 [2021-06-05 05:34:03,625 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:34:03,625 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 29 treesize of output 17 [2021-06-05 05:34:03,626 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:34:03,631 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:34:03,631 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 05:34:03,631 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:34:03,830 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:34:03,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424940655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:34:03,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:34:03,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:34:03,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637124094] [2021-06-05 05:34:03,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:34:03,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:34:03,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:34:03,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1249, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:34:03,831 INFO L87 Difference]: Start difference. First operand 7648 states and 23126 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:34:06,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:34:06,102 INFO L93 Difference]: Finished difference Result 9289 states and 27935 transitions. [2021-06-05 05:34:06,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 05:34:06,102 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:34:06,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:34:06,115 INFO L225 Difference]: With dead ends: 9289 [2021-06-05 05:34:06,115 INFO L226 Difference]: Without dead ends: 9125 [2021-06-05 05:34:06,115 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 1698.9ms TimeCoverageRelationStatistics Valid=238, Invalid=3422, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 05:34:06,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9125 states. [2021-06-05 05:34:06,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9125 to 7732. [2021-06-05 05:34:06,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7732 states, 7731 states have (on average 3.024835079549864) internal successors, (23385), 7731 states have internal predecessors, (23385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:34:06,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7732 states to 7732 states and 23385 transitions. [2021-06-05 05:34:06,221 INFO L78 Accepts]: Start accepts. Automaton has 7732 states and 23385 transitions. Word has length 37 [2021-06-05 05:34:06,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:34:06,221 INFO L482 AbstractCegarLoop]: Abstraction has 7732 states and 23385 transitions. [2021-06-05 05:34:06,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:34:06,222 INFO L276 IsEmpty]: Start isEmpty. Operand 7732 states and 23385 transitions. [2021-06-05 05:34:06,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:34:06,230 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:34:06,230 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:34:06,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-05 05:34:06,430 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:34:06,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:34:06,430 INFO L82 PathProgramCache]: Analyzing trace with hash -576503110, now seen corresponding path program 68 times [2021-06-05 05:34:06,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:34:06,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152299215] [2021-06-05 05:34:06,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:34:06,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:34:06,755 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:34:06,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:34:06,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152299215] [2021-06-05 05:34:06,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152299215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:34:06,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696256898] [2021-06-05 05:34:06,755 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 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 05:34:06,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:34:06,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:34:06,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:34:06,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:34:07,024 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:34:07,024 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 27 treesize of output 15 [2021-06-05 05:34:07,025 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:34:07,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:34:07,032 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 05:34:07,032 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 05:34:07,267 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:34:07,267 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 30 treesize of output 18 [2021-06-05 05:34:07,268 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:34:07,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:34:07,274 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 05:34:07,275 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 05:34:07,455 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:34:07,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696256898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:34:07,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:34:07,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:34:07,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238644832] [2021-06-05 05:34:07,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:34:07,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:34:07,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:34:07,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1248, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:34:07,456 INFO L87 Difference]: Start difference. First operand 7732 states and 23385 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:34:09,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:34:09,665 INFO L93 Difference]: Finished difference Result 9355 states and 28210 transitions. [2021-06-05 05:34:09,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:34:09,666 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:34:09,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:34:09,678 INFO L225 Difference]: With dead ends: 9355 [2021-06-05 05:34:09,678 INFO L226 Difference]: Without dead ends: 9181 [2021-06-05 05:34:09,678 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 1818.3ms TimeCoverageRelationStatistics Valid=234, Invalid=3426, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 05:34:09,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9181 states. [2021-06-05 05:34:09,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9181 to 7751. [2021-06-05 05:34:09,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7751 states, 7750 states have (on average 3.025161290322581) internal successors, (23445), 7750 states have internal predecessors, (23445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:34:09,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7751 states to 7751 states and 23445 transitions. [2021-06-05 05:34:09,785 INFO L78 Accepts]: Start accepts. Automaton has 7751 states and 23445 transitions. Word has length 37 [2021-06-05 05:34:09,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:34:09,785 INFO L482 AbstractCegarLoop]: Abstraction has 7751 states and 23445 transitions. [2021-06-05 05:34:09,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:34:09,786 INFO L276 IsEmpty]: Start isEmpty. Operand 7751 states and 23445 transitions. [2021-06-05 05:34:09,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:34:09,794 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:34:09,795 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:34:09,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 05:34:09,995 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:34:09,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:34:09,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1783374260, now seen corresponding path program 69 times [2021-06-05 05:34:09,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:34:09,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646434774] [2021-06-05 05:34:09,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:34:10,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:34:10,316 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:34:10,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:34:10,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646434774] [2021-06-05 05:34:10,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646434774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:34:10,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215837177] [2021-06-05 05:34:10,317 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 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 05:34:10,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:34:10,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:34:10,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:34:10,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:34:10,553 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:34:10,554 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 27 treesize of output 15 [2021-06-05 05:34:10,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:34:10,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:34:10,561 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 05:34:10,561 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 05:34:10,805 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:34:10,806 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 34 treesize of output 18 [2021-06-05 05:34:10,807 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:34:10,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:34:10,812 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 05:34:10,812 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:21 [2021-06-05 05:34:10,969 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:34:10,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215837177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:34:10,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:34:10,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:34:10,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943223948] [2021-06-05 05:34:10,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:34:10,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:34:10,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:34:10,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1249, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:34:10,970 INFO L87 Difference]: Start difference. First operand 7751 states and 23445 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:34:13,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:34:13,054 INFO L93 Difference]: Finished difference Result 9507 states and 28682 transitions. [2021-06-05 05:34:13,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:34:13,054 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:34:13,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:34:13,066 INFO L225 Difference]: With dead ends: 9507 [2021-06-05 05:34:13,066 INFO L226 Difference]: Without dead ends: 9289 [2021-06-05 05:34:13,067 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 1603.8ms TimeCoverageRelationStatistics Valid=215, Invalid=2977, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 05:34:13,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9289 states. [2021-06-05 05:34:13,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9289 to 7726. [2021-06-05 05:34:13,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7726 states, 7725 states have (on average 3.029514563106796) internal successors, (23403), 7725 states have internal predecessors, (23403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:34:13,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7726 states to 7726 states and 23403 transitions. [2021-06-05 05:34:13,176 INFO L78 Accepts]: Start accepts. Automaton has 7726 states and 23403 transitions. Word has length 37 [2021-06-05 05:34:13,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:34:13,176 INFO L482 AbstractCegarLoop]: Abstraction has 7726 states and 23403 transitions. [2021-06-05 05:34:13,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:34:13,176 INFO L276 IsEmpty]: Start isEmpty. Operand 7726 states and 23403 transitions. [2021-06-05 05:34:13,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:34:13,185 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:34:13,185 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:34:13,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:34:13,389 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:34:13,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:34:13,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1549469464, now seen corresponding path program 70 times [2021-06-05 05:34:13,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:34:13,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564448784] [2021-06-05 05:34:13,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:34:13,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:34:13,729 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:34:13,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:34:13,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564448784] [2021-06-05 05:34:13,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564448784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:34:13,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188395947] [2021-06-05 05:34:13,729 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 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 05:34:13,755 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:34:13,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:34:13,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:34:13,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:34:14,024 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:34:14,024 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 25 treesize of output 13 [2021-06-05 05:34:14,025 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:34:14,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:34:14,032 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 05:34:14,032 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 05:34:14,092 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:34:14,092 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 29 treesize of output 17 [2021-06-05 05:34:14,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:34:14,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:34:14,099 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 05:34:14,099 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:34:14,255 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:34:14,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188395947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:34:14,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:34:14,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2021-06-05 05:34:14,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236840429] [2021-06-05 05:34:14,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:34:14,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:34:14,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:34:14,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1151, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:34:14,256 INFO L87 Difference]: Start difference. First operand 7726 states and 23403 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 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 05:34:18,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:34:18,604 INFO L93 Difference]: Finished difference Result 16463 states and 48777 transitions. [2021-06-05 05:34:18,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-06-05 05:34:18,605 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 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 05:34:18,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:34:18,630 INFO L225 Difference]: With dead ends: 16463 [2021-06-05 05:34:18,630 INFO L226 Difference]: Without dead ends: 16129 [2021-06-05 05:34:18,631 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3394 ImplicationChecksByTransitivity, 3478.5ms TimeCoverageRelationStatistics Valid=1158, Invalid=10614, Unknown=0, NotChecked=0, Total=11772 [2021-06-05 05:34:18,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16129 states. [2021-06-05 05:34:18,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16129 to 8079. [2021-06-05 05:34:18,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8079 states, 8078 states have (on average 3.0300817033919287) internal successors, (24477), 8078 states have internal predecessors, (24477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:34:18,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8079 states to 8079 states and 24477 transitions. [2021-06-05 05:34:18,804 INFO L78 Accepts]: Start accepts. Automaton has 8079 states and 24477 transitions. Word has length 37 [2021-06-05 05:34:18,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:34:18,804 INFO L482 AbstractCegarLoop]: Abstraction has 8079 states and 24477 transitions. [2021-06-05 05:34:18,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 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 05:34:18,804 INFO L276 IsEmpty]: Start isEmpty. Operand 8079 states and 24477 transitions. [2021-06-05 05:34:18,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:34:18,813 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:34:18,813 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:34:19,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-05 05:34:19,029 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:34:19,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:34:19,029 INFO L82 PathProgramCache]: Analyzing trace with hash 146836776, now seen corresponding path program 71 times [2021-06-05 05:34:19,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:34:19,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014718290] [2021-06-05 05:34:19,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:34:19,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:34:19,388 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:34:19,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:34:19,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014718290] [2021-06-05 05:34:19,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014718290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:34:19,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143750620] [2021-06-05 05:34:19,389 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 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 05:34:19,440 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:34:19,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:34:19,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 05:34:19,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:34:19,743 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:34:19,743 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 31 treesize of output 19 [2021-06-05 05:34:19,744 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:34:19,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:34:19,750 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 05:34:19,750 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:28 [2021-06-05 05:34:19,809 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:34:19,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 05:34:19,810 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:34:19,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:34:19,816 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 05:34:19,816 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:17 [2021-06-05 05:34:19,970 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:34:19,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143750620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:34:19,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:34:19,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 05:34:19,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365442264] [2021-06-05 05:34:19,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 05:34:19,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:34:19,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 05:34:19,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=968, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:34:19,971 INFO L87 Difference]: Start difference. First operand 8079 states and 24477 transitions. Second operand has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 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 05:34:23,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:34:23,341 INFO L93 Difference]: Finished difference Result 13022 states and 39095 transitions. [2021-06-05 05:34:23,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-05 05:34:23,341 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 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 05:34:23,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:34:23,358 INFO L225 Difference]: With dead ends: 13022 [2021-06-05 05:34:23,358 INFO L226 Difference]: Without dead ends: 12649 [2021-06-05 05:34:23,359 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 2240.4ms TimeCoverageRelationStatistics Valid=486, Invalid=6486, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 05:34:23,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12649 states. [2021-06-05 05:34:23,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12649 to 8061. [2021-06-05 05:34:23,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8061 states, 8060 states have (on average 3.036848635235732) internal successors, (24477), 8060 states have internal predecessors, (24477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:34:23,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8061 states to 8061 states and 24477 transitions. [2021-06-05 05:34:23,478 INFO L78 Accepts]: Start accepts. Automaton has 8061 states and 24477 transitions. Word has length 37 [2021-06-05 05:34:23,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:34:23,478 INFO L482 AbstractCegarLoop]: Abstraction has 8061 states and 24477 transitions. [2021-06-05 05:34:23,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 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 05:34:23,478 INFO L276 IsEmpty]: Start isEmpty. Operand 8061 states and 24477 transitions. [2021-06-05 05:34:23,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:34:23,486 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:34:23,486 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:34:23,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:34:23,687 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:34:23,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:34:23,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1505232886, now seen corresponding path program 72 times [2021-06-05 05:34:23,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:34:23,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538418813] [2021-06-05 05:34:23,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:34:23,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:34:24,026 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:34:24,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:34:24,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538418813] [2021-06-05 05:34:24,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538418813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:34:24,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555173207] [2021-06-05 05:34:24,026 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 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 05:34:24,056 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:34:24,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:34:24,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:34:24,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:34:24,344 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:34:24,344 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 31 treesize of output 19 [2021-06-05 05:34:24,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:34:24,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:34:24,352 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 05:34:24,352 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:37 [2021-06-05 05:34:24,415 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:34:24,415 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 43 treesize of output 23 [2021-06-05 05:34:24,416 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:34:24,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:34:24,422 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 05:34:24,422 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:20 [2021-06-05 05:34:24,513 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:34:24,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555173207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:34:24,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:34:24,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 35 [2021-06-05 05:34:24,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164277922] [2021-06-05 05:34:24,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:34:24,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:34:24,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:34:24,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1148, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:34:24,514 INFO L87 Difference]: Start difference. First operand 8061 states and 24477 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 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 05:34:27,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:34:27,430 INFO L93 Difference]: Finished difference Result 15666 states and 46528 transitions. [2021-06-05 05:34:27,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 05:34:27,431 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 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 05:34:27,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:34:27,453 INFO L225 Difference]: With dead ends: 15666 [2021-06-05 05:34:27,453 INFO L226 Difference]: Without dead ends: 15353 [2021-06-05 05:34:27,454 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1772 ImplicationChecksByTransitivity, 2438.6ms TimeCoverageRelationStatistics Valid=717, Invalid=6423, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 05:34:27,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15353 states. [2021-06-05 05:34:27,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15353 to 8111. [2021-06-05 05:34:27,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8111 states, 8110 states have (on average 3.0355117139334156) internal successors, (24618), 8110 states have internal predecessors, (24618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:34:27,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8111 states to 8111 states and 24618 transitions. [2021-06-05 05:34:27,603 INFO L78 Accepts]: Start accepts. Automaton has 8111 states and 24618 transitions. Word has length 37 [2021-06-05 05:34:27,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:34:27,604 INFO L482 AbstractCegarLoop]: Abstraction has 8111 states and 24618 transitions. [2021-06-05 05:34:27,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 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 05:34:27,604 INFO L276 IsEmpty]: Start isEmpty. Operand 8111 states and 24618 transitions. [2021-06-05 05:34:27,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:34:27,613 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:34:27,613 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:34:27,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:34:27,814 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:34:27,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:34:27,814 INFO L82 PathProgramCache]: Analyzing trace with hash 594236954, now seen corresponding path program 73 times [2021-06-05 05:34:27,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:34:27,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243530166] [2021-06-05 05:34:27,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:34:27,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:34:28,120 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:34:28,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:34:28,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243530166] [2021-06-05 05:34:28,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243530166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:34:28,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630469697] [2021-06-05 05:34:28,120 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 05:34:28,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:34:28,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:34:28,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:34:28,324 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:34:28,324 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 25 treesize of output 13 [2021-06-05 05:34:28,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:34:28,331 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:34:28,331 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 05:34:28,332 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 05:34:28,510 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:34:28,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 05:34:28,511 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:34:28,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:34:28,517 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 05:34:28,517 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:34:28,679 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:34:28,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630469697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:34:28,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:34:28,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:34:28,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924970422] [2021-06-05 05:34:28,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:34:28,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:34:28,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:34:28,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1223, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:34:28,680 INFO L87 Difference]: Start difference. First operand 8111 states and 24618 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:34:32,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:34:32,700 INFO L93 Difference]: Finished difference Result 16437 states and 48919 transitions. [2021-06-05 05:34:32,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 05:34:32,700 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:34:32,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:34:32,723 INFO L225 Difference]: With dead ends: 16437 [2021-06-05 05:34:32,723 INFO L226 Difference]: Without dead ends: 16158 [2021-06-05 05:34:32,723 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2987 ImplicationChecksByTransitivity, 3324.3ms TimeCoverageRelationStatistics Valid=1041, Invalid=9671, Unknown=0, NotChecked=0, Total=10712 [2021-06-05 05:34:32,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16158 states. [2021-06-05 05:34:32,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16158 to 8329. [2021-06-05 05:34:32,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8329 states, 8328 states have (on average 3.0345821325648417) internal successors, (25272), 8328 states have internal predecessors, (25272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:34:32,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8329 states to 8329 states and 25272 transitions. [2021-06-05 05:34:32,872 INFO L78 Accepts]: Start accepts. Automaton has 8329 states and 25272 transitions. Word has length 37 [2021-06-05 05:34:32,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:34:32,872 INFO L482 AbstractCegarLoop]: Abstraction has 8329 states and 25272 transitions. [2021-06-05 05:34:32,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:34:32,872 INFO L276 IsEmpty]: Start isEmpty. Operand 8329 states and 25272 transitions. [2021-06-05 05:34:32,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:34:32,881 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:34:32,881 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:34:33,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-05 05:34:33,081 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:34:33,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:34:33,082 INFO L82 PathProgramCache]: Analyzing trace with hash -2004424102, now seen corresponding path program 74 times [2021-06-05 05:34:33,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:34:33,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740487624] [2021-06-05 05:34:33,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:34:33,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:34:33,403 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:34:33,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:34:33,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740487624] [2021-06-05 05:34:33,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740487624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:34:33,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834450529] [2021-06-05 05:34:33,403 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 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 05:34:33,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:34:33,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:34:33,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:34:33,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:34:33,627 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:34:33,628 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 27 treesize of output 15 [2021-06-05 05:34:33,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:34:33,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:34:33,635 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 05:34:33,636 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 05:34:33,790 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:34:33,790 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 29 treesize of output 17 [2021-06-05 05:34:33,791 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:34:33,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:34:33,796 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 05:34:33,796 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:34:33,979 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:34:33,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834450529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:34:33,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:34:33,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:34:33,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681787493] [2021-06-05 05:34:33,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:34:33,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:34:33,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:34:33,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1244, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:34:33,980 INFO L87 Difference]: Start difference. First operand 8329 states and 25272 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:34:38,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:34:38,228 INFO L93 Difference]: Finished difference Result 12304 states and 36865 transitions. [2021-06-05 05:34:38,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 05:34:38,228 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:34:38,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:34:38,243 INFO L225 Difference]: With dead ends: 12304 [2021-06-05 05:34:38,243 INFO L226 Difference]: Without dead ends: 12020 [2021-06-05 05:34:38,244 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2269 ImplicationChecksByTransitivity, 3002.1ms TimeCoverageRelationStatistics Valid=597, Invalid=8523, Unknown=0, NotChecked=0, Total=9120 [2021-06-05 05:34:38,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12020 states. [2021-06-05 05:34:38,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12020 to 8329. [2021-06-05 05:34:38,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8329 states, 8328 states have (on average 3.0355427473583094) internal successors, (25280), 8328 states have internal predecessors, (25280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:34:38,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8329 states to 8329 states and 25280 transitions. [2021-06-05 05:34:38,367 INFO L78 Accepts]: Start accepts. Automaton has 8329 states and 25280 transitions. Word has length 37 [2021-06-05 05:34:38,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:34:38,367 INFO L482 AbstractCegarLoop]: Abstraction has 8329 states and 25280 transitions. [2021-06-05 05:34:38,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:34:38,367 INFO L276 IsEmpty]: Start isEmpty. Operand 8329 states and 25280 transitions. [2021-06-05 05:34:38,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:34:38,376 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:34:38,376 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:34:38,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-05 05:34:38,577 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:34:38,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:34:38,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1469667314, now seen corresponding path program 75 times [2021-06-05 05:34:38,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:34:38,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737737356] [2021-06-05 05:34:38,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:34:38,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:34:38,907 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:34:38,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:34:38,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737737356] [2021-06-05 05:34:38,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737737356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:34:38,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218911589] [2021-06-05 05:34:38,908 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 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 05:34:38,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:34:38,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:34:38,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:34:38,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:34:39,132 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:34:39,132 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 27 treesize of output 15 [2021-06-05 05:34:39,133 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:34:39,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:34:39,140 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 05:34:39,140 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 05:34:39,315 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:34:39,315 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 38 treesize of output 22 [2021-06-05 05:34:39,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:34:39,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:34:39,322 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 05:34:39,322 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:20 [2021-06-05 05:34:39,493 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:34:39,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218911589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:34:39,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:34:39,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:34:39,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291508219] [2021-06-05 05:34:39,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:34:39,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:34:39,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:34:39,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1244, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:34:39,494 INFO L87 Difference]: Start difference. First operand 8329 states and 25280 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:34:43,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:34:43,349 INFO L93 Difference]: Finished difference Result 13628 states and 40763 transitions. [2021-06-05 05:34:43,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 05:34:43,350 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:34:43,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:34:43,369 INFO L225 Difference]: With dead ends: 13628 [2021-06-05 05:34:43,369 INFO L226 Difference]: Without dead ends: 13372 [2021-06-05 05:34:43,370 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2004 ImplicationChecksByTransitivity, 2835.9ms TimeCoverageRelationStatistics Valid=515, Invalid=7857, Unknown=0, NotChecked=0, Total=8372 [2021-06-05 05:34:43,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13372 states. [2021-06-05 05:34:43,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13372 to 8322. [2021-06-05 05:34:43,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8322 states, 8321 states have (on average 3.0348515803389016) internal successors, (25253), 8321 states have internal predecessors, (25253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:34:43,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8322 states to 8322 states and 25253 transitions. [2021-06-05 05:34:43,531 INFO L78 Accepts]: Start accepts. Automaton has 8322 states and 25253 transitions. Word has length 37 [2021-06-05 05:34:43,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:34:43,532 INFO L482 AbstractCegarLoop]: Abstraction has 8322 states and 25253 transitions. [2021-06-05 05:34:43,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:34:43,532 INFO L276 IsEmpty]: Start isEmpty. Operand 8322 states and 25253 transitions. [2021-06-05 05:34:43,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:34:43,541 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:34:43,541 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:34:43,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:34:43,742 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:34:43,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:34:43,742 INFO L82 PathProgramCache]: Analyzing trace with hash 644586826, now seen corresponding path program 76 times [2021-06-05 05:34:43,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:34:43,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610600351] [2021-06-05 05:34:43,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:34:43,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:34:44,074 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:34:44,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:34:44,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610600351] [2021-06-05 05:34:44,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610600351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:34:44,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849490754] [2021-06-05 05:34:44,075 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 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 05:34:44,100 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:34:44,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:34:44,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:34:44,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:34:44,298 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:34:44,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 05:34:44,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:34:44,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:34:44,306 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 05:34:44,306 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 05:34:44,518 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:34:44,518 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 30 treesize of output 18 [2021-06-05 05:34:44,519 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:34:44,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:34:44,525 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 05:34:44,525 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 05:34:44,673 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:34:44,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849490754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:34:44,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:34:44,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:34:44,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583173563] [2021-06-05 05:34:44,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:34:44,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:34:44,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:34:44,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1244, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:34:44,674 INFO L87 Difference]: Start difference. First operand 8322 states and 25253 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:34:48,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:34:48,321 INFO L93 Difference]: Finished difference Result 13843 states and 41442 transitions. [2021-06-05 05:34:48,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 05:34:48,321 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:34:48,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:34:48,341 INFO L225 Difference]: With dead ends: 13843 [2021-06-05 05:34:48,342 INFO L226 Difference]: Without dead ends: 13564 [2021-06-05 05:34:48,342 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1694 ImplicationChecksByTransitivity, 2623.5ms TimeCoverageRelationStatistics Valid=440, Invalid=6870, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 05:34:48,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13564 states. [2021-06-05 05:34:48,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13564 to 8332. [2021-06-05 05:34:48,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8332 states, 8331 states have (on average 3.035770015604369) internal successors, (25291), 8331 states have internal predecessors, (25291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:34:48,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8332 states to 8332 states and 25291 transitions. [2021-06-05 05:34:48,497 INFO L78 Accepts]: Start accepts. Automaton has 8332 states and 25291 transitions. Word has length 37 [2021-06-05 05:34:48,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:34:48,497 INFO L482 AbstractCegarLoop]: Abstraction has 8332 states and 25291 transitions. [2021-06-05 05:34:48,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:34:48,497 INFO L276 IsEmpty]: Start isEmpty. Operand 8332 states and 25291 transitions. [2021-06-05 05:34:48,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:34:48,507 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:34:48,507 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:34:48,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-06-05 05:34:48,723 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:34:48,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:34:48,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1790118686, now seen corresponding path program 77 times [2021-06-05 05:34:48,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:34:48,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905671782] [2021-06-05 05:34:48,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:34:48,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:34:49,096 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:34:49,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:34:49,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905671782] [2021-06-05 05:34:49,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905671782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:34:49,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961424289] [2021-06-05 05:34:49,097 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 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 05:34:49,125 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:34:49,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:34:49,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 05:34:49,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:34:49,352 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:34:49,353 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 25 treesize of output 13 [2021-06-05 05:34:49,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:34:49,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:34:49,361 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 05:34:49,361 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 05:34:49,560 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:34:49,560 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 29 treesize of output 17 [2021-06-05 05:34:49,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:34:49,567 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:34:49,567 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 05:34:49,567 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:34:49,745 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:34:49,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961424289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:34:49,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:34:49,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:34:49,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920427215] [2021-06-05 05:34:49,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:34:49,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:34:49,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:34:49,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1245, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:34:49,746 INFO L87 Difference]: Start difference. First operand 8332 states and 25291 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:34:53,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:34:53,480 INFO L93 Difference]: Finished difference Result 13716 states and 41060 transitions. [2021-06-05 05:34:53,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 05:34:53,481 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:34:53,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:34:53,501 INFO L225 Difference]: With dead ends: 13716 [2021-06-05 05:34:53,501 INFO L226 Difference]: Without dead ends: 13460 [2021-06-05 05:34:53,502 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1745 ImplicationChecksByTransitivity, 2702.6ms TimeCoverageRelationStatistics Valid=470, Invalid=7186, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 05:34:53,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13460 states. [2021-06-05 05:34:53,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13460 to 8320. [2021-06-05 05:34:53,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8320 states, 8319 states have (on average 3.0360620266858995) internal successors, (25257), 8319 states have internal predecessors, (25257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:34:53,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8320 states to 8320 states and 25257 transitions. [2021-06-05 05:34:53,641 INFO L78 Accepts]: Start accepts. Automaton has 8320 states and 25257 transitions. Word has length 37 [2021-06-05 05:34:53,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:34:53,641 INFO L482 AbstractCegarLoop]: Abstraction has 8320 states and 25257 transitions. [2021-06-05 05:34:53,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:34:53,642 INFO L276 IsEmpty]: Start isEmpty. Operand 8320 states and 25257 transitions. [2021-06-05 05:34:53,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:34:53,651 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:34:53,651 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:34:53,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:34:53,852 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:34:53,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:34:53,852 INFO L82 PathProgramCache]: Analyzing trace with hash -390594470, now seen corresponding path program 78 times [2021-06-05 05:34:53,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:34:53,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403233623] [2021-06-05 05:34:53,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:34:53,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:34:54,204 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:34:54,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:34:54,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403233623] [2021-06-05 05:34:54,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403233623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:34:54,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437103530] [2021-06-05 05:34:54,204 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 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 05:34:54,230 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:34:54,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:34:54,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:34:54,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:34:54,433 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:34:54,433 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 27 treesize of output 15 [2021-06-05 05:34:54,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:34:54,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:34:54,441 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 05:34:54,441 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 05:34:54,657 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:34:54,657 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 39 treesize of output 23 [2021-06-05 05:34:54,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:34:54,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:34:54,664 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 05:34:54,664 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:23 [2021-06-05 05:34:54,805 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:34:54,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437103530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:34:54,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:34:54,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:34:54,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554987664] [2021-06-05 05:34:54,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:34:54,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:34:54,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:34:54,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1245, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:34:54,806 INFO L87 Difference]: Start difference. First operand 8320 states and 25257 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:34:58,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:34:58,746 INFO L93 Difference]: Finished difference Result 14169 states and 42466 transitions. [2021-06-05 05:34:58,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 05:34:58,746 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:34:58,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:34:58,764 INFO L225 Difference]: With dead ends: 14169 [2021-06-05 05:34:58,765 INFO L226 Difference]: Without dead ends: 13893 [2021-06-05 05:34:58,765 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1667 ImplicationChecksByTransitivity, 2633.1ms TimeCoverageRelationStatistics Valid=433, Invalid=6877, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 05:34:58,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13893 states. [2021-06-05 05:34:58,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13893 to 8338. [2021-06-05 05:34:58,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8338 states, 8337 states have (on average 3.0361041141897567) internal successors, (25312), 8337 states have internal predecessors, (25312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:34:58,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8338 states to 8338 states and 25312 transitions. [2021-06-05 05:34:58,897 INFO L78 Accepts]: Start accepts. Automaton has 8338 states and 25312 transitions. Word has length 37 [2021-06-05 05:34:58,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:34:58,897 INFO L482 AbstractCegarLoop]: Abstraction has 8338 states and 25312 transitions. [2021-06-05 05:34:58,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:34:58,897 INFO L276 IsEmpty]: Start isEmpty. Operand 8338 states and 25312 transitions. [2021-06-05 05:34:58,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:34:58,906 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:34:58,906 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:34:59,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:34:59,107 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:34:59,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:34:59,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1597465620, now seen corresponding path program 79 times [2021-06-05 05:34:59,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:34:59,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962833490] [2021-06-05 05:34:59,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:34:59,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:34:59,436 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:34:59,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:34:59,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962833490] [2021-06-05 05:34:59,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962833490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:34:59,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115734097] [2021-06-05 05:34:59,437 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 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 05:34:59,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:34:59,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:34:59,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:34:59,665 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:34:59,665 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 25 treesize of output 13 [2021-06-05 05:34:59,669 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:34:59,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:34:59,676 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 05:34:59,676 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 05:34:59,878 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:34:59,878 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 30 treesize of output 18 [2021-06-05 05:34:59,882 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:34:59,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:34:59,888 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 05:34:59,888 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 05:35:00,048 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:35:00,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115734097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:35:00,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:35:00,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:35:00,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919792007] [2021-06-05 05:35:00,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:35:00,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:35:00,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:35:00,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1246, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:35:00,049 INFO L87 Difference]: Start difference. First operand 8338 states and 25312 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:35:03,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:35:03,504 INFO L93 Difference]: Finished difference Result 13483 states and 40301 transitions. [2021-06-05 05:35:03,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 05:35:03,505 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:35:03,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:35:03,524 INFO L225 Difference]: With dead ends: 13483 [2021-06-05 05:35:03,524 INFO L226 Difference]: Without dead ends: 13191 [2021-06-05 05:35:03,525 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1421 ImplicationChecksByTransitivity, 2490.7ms TimeCoverageRelationStatistics Valid=403, Invalid=6239, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 05:35:03,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13191 states. [2021-06-05 05:35:03,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13191 to 8332. [2021-06-05 05:35:03,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8332 states, 8331 states have (on average 3.0367302844796544) internal successors, (25299), 8331 states have internal predecessors, (25299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:35:03,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8332 states to 8332 states and 25299 transitions. [2021-06-05 05:35:03,666 INFO L78 Accepts]: Start accepts. Automaton has 8332 states and 25299 transitions. Word has length 37 [2021-06-05 05:35:03,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:35:03,667 INFO L482 AbstractCegarLoop]: Abstraction has 8332 states and 25299 transitions. [2021-06-05 05:35:03,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:35:03,667 INFO L276 IsEmpty]: Start isEmpty. Operand 8332 states and 25299 transitions. [2021-06-05 05:35:03,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:35:03,676 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:35:03,676 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:35:03,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-05 05:35:03,881 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:35:03,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:35:03,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1947653718, now seen corresponding path program 80 times [2021-06-05 05:35:03,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:35:03,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552929665] [2021-06-05 05:35:03,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:35:03,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:35:04,252 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:35:04,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:35:04,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552929665] [2021-06-05 05:35:04,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552929665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:35:04,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839306738] [2021-06-05 05:35:04,252 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 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 05:35:04,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:35:04,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:35:04,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:35:04,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:35:04,487 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:35:04,487 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 27 treesize of output 15 [2021-06-05 05:35:04,488 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:35:04,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:35:04,496 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 05:35:04,496 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 05:35:04,700 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:35:04,700 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 29 treesize of output 17 [2021-06-05 05:35:04,701 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:35:04,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:35:04,707 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 05:35:04,707 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:35:04,877 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:35:04,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839306738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:35:04,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:35:04,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:35:04,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402384346] [2021-06-05 05:35:04,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:35:04,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:35:04,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:35:04,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:35:04,878 INFO L87 Difference]: Start difference. First operand 8332 states and 25299 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:35:08,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:35:08,682 INFO L93 Difference]: Finished difference Result 16854 states and 50179 transitions. [2021-06-05 05:35:08,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 05:35:08,683 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:35:08,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:35:08,706 INFO L225 Difference]: With dead ends: 16854 [2021-06-05 05:35:08,706 INFO L226 Difference]: Without dead ends: 16575 [2021-06-05 05:35:08,706 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2293 ImplicationChecksByTransitivity, 3141.4ms TimeCoverageRelationStatistics Valid=784, Invalid=8146, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 05:35:08,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16575 states. [2021-06-05 05:35:08,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16575 to 8446. [2021-06-05 05:35:08,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8446 states, 8445 states have (on average 3.0351687388987565) internal successors, (25632), 8445 states have internal predecessors, (25632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:35:08,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8446 states to 8446 states and 25632 transitions. [2021-06-05 05:35:08,867 INFO L78 Accepts]: Start accepts. Automaton has 8446 states and 25632 transitions. Word has length 37 [2021-06-05 05:35:08,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:35:08,867 INFO L482 AbstractCegarLoop]: Abstraction has 8446 states and 25632 transitions. [2021-06-05 05:35:08,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:35:08,867 INFO L276 IsEmpty]: Start isEmpty. Operand 8446 states and 25632 transitions. [2021-06-05 05:35:08,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:35:08,877 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:35:08,877 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:35:09,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 05:35:09,077 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:35:09,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:35:09,078 INFO L82 PathProgramCache]: Analyzing trace with hash -651007338, now seen corresponding path program 81 times [2021-06-05 05:35:09,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:35:09,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259291929] [2021-06-05 05:35:09,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:35:09,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:35:09,407 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:35:09,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:35:09,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259291929] [2021-06-05 05:35:09,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259291929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:35:09,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038834469] [2021-06-05 05:35:09,407 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 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 05:35:09,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:35:09,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:35:09,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:35:09,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:35:09,664 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:35:09,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 05:35:09,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:35:09,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:35:09,672 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 05:35:09,672 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 05:35:09,865 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:35:09,865 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 36 treesize of output 20 [2021-06-05 05:35:09,866 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:35:09,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:35:09,872 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 05:35:09,872 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:20 [2021-06-05 05:35:10,054 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:35:10,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038834469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:35:10,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:35:10,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:35:10,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515318194] [2021-06-05 05:35:10,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:35:10,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:35:10,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:35:10,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1247, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:35:10,055 INFO L87 Difference]: Start difference. First operand 8446 states and 25632 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:35:12,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:35:12,637 INFO L93 Difference]: Finished difference Result 11633 states and 34886 transitions. [2021-06-05 05:35:12,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 05:35:12,637 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:35:12,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:35:12,653 INFO L225 Difference]: With dead ends: 11633 [2021-06-05 05:35:12,653 INFO L226 Difference]: Without dead ends: 11318 [2021-06-05 05:35:12,653 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 1912.9ms TimeCoverageRelationStatistics Valid=303, Invalid=4389, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 05:35:12,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11318 states. [2021-06-05 05:35:12,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11318 to 8409. [2021-06-05 05:35:12,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8409 states, 8408 states have (on average 3.0388915318744054) internal successors, (25551), 8408 states have internal predecessors, (25551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:35:12,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8409 states to 8409 states and 25551 transitions. [2021-06-05 05:35:12,783 INFO L78 Accepts]: Start accepts. Automaton has 8409 states and 25551 transitions. Word has length 37 [2021-06-05 05:35:12,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:35:12,784 INFO L482 AbstractCegarLoop]: Abstraction has 8409 states and 25551 transitions. [2021-06-05 05:35:12,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:35:12,784 INFO L276 IsEmpty]: Start isEmpty. Operand 8409 states and 25551 transitions. [2021-06-05 05:35:12,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:35:12,793 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:35:12,793 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:35:13,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:35:13,009 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:35:13,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:35:13,009 INFO L82 PathProgramCache]: Analyzing trace with hash -2113893768, now seen corresponding path program 82 times [2021-06-05 05:35:13,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:35:13,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634825893] [2021-06-05 05:35:13,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:35:13,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:35:13,414 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:35:13,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:35:13,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634825893] [2021-06-05 05:35:13,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634825893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:35:13,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720499447] [2021-06-05 05:35:13,414 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 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 05:35:13,446 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:35:13,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:35:13,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:35:13,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:35:13,803 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:35:13,803 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 25 treesize of output 13 [2021-06-05 05:35:13,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:35:13,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:35:13,813 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 05:35:13,814 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 05:35:13,887 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:35:13,887 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 29 treesize of output 17 [2021-06-05 05:35:13,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:35:13,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:35:13,894 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 05:35:13,894 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:35:14,076 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:35:14,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720499447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:35:14,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:35:14,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 37 [2021-06-05 05:35:14,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285028058] [2021-06-05 05:35:14,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:35:14,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:35:14,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:35:14,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1300, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:35:14,077 INFO L87 Difference]: Start difference. First operand 8409 states and 25551 transitions. Second operand has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 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 05:35:17,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:35:17,404 INFO L93 Difference]: Finished difference Result 13168 states and 39076 transitions. [2021-06-05 05:35:17,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 05:35:17,405 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 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 05:35:17,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:35:17,425 INFO L225 Difference]: With dead ends: 13168 [2021-06-05 05:35:17,425 INFO L226 Difference]: Without dead ends: 12986 [2021-06-05 05:35:17,426 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2074 ImplicationChecksByTransitivity, 2941.8ms TimeCoverageRelationStatistics Valid=787, Invalid=7585, Unknown=0, NotChecked=0, Total=8372 [2021-06-05 05:35:17,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12986 states. [2021-06-05 05:35:17,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12986 to 8519. [2021-06-05 05:35:17,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8519 states, 8518 states have (on average 3.0319323784926038) internal successors, (25826), 8518 states have internal predecessors, (25826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:35:17,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8519 states to 8519 states and 25826 transitions. [2021-06-05 05:35:17,596 INFO L78 Accepts]: Start accepts. Automaton has 8519 states and 25826 transitions. Word has length 37 [2021-06-05 05:35:17,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:35:17,596 INFO L482 AbstractCegarLoop]: Abstraction has 8519 states and 25826 transitions. [2021-06-05 05:35:17,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 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 05:35:17,596 INFO L276 IsEmpty]: Start isEmpty. Operand 8519 states and 25826 transitions. [2021-06-05 05:35:17,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:35:17,606 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:35:17,606 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:35:17,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:35:17,806 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:35:17,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:35:17,807 INFO L82 PathProgramCache]: Analyzing trace with hash -417587528, now seen corresponding path program 83 times [2021-06-05 05:35:17,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:35:17,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090762602] [2021-06-05 05:35:17,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:35:17,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:35:18,130 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:35:18,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:35:18,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090762602] [2021-06-05 05:35:18,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090762602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:35:18,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185222876] [2021-06-05 05:35:18,130 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 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 05:35:18,157 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:35:18,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:35:18,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:35:18,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:35:18,398 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:35:18,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-06-05 05:35:18,399 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:35:18,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:35:18,405 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 05:35:18,405 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:41 [2021-06-05 05:35:18,464 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:35:18,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 05:35:18,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:35:18,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:35:18,469 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 05:35:18,469 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:17 [2021-06-05 05:35:18,587 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:35:18,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185222876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:35:18,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:35:18,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 33 [2021-06-05 05:35:18,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237815273] [2021-06-05 05:35:18,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 05:35:18,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:35:18,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 05:35:18,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:35:18,588 INFO L87 Difference]: Start difference. First operand 8519 states and 25826 transitions. Second operand has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 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 05:35:19,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:35:19,341 INFO L93 Difference]: Finished difference Result 8965 states and 27063 transitions. [2021-06-05 05:35:19,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:35:19,341 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 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 05:35:19,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:35:19,354 INFO L225 Difference]: With dead ends: 8965 [2021-06-05 05:35:19,354 INFO L226 Difference]: Without dead ends: 8764 [2021-06-05 05:35:19,354 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 880.0ms TimeCoverageRelationStatistics Valid=157, Invalid=1735, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:35:19,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8764 states. [2021-06-05 05:35:19,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8764 to 8450. [2021-06-05 05:35:19,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8450 states, 8449 states have (on average 3.037045804237188) internal successors, (25660), 8449 states have internal predecessors, (25660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:35:19,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8450 states to 8450 states and 25660 transitions. [2021-06-05 05:35:19,463 INFO L78 Accepts]: Start accepts. Automaton has 8450 states and 25660 transitions. Word has length 37 [2021-06-05 05:35:19,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:35:19,463 INFO L482 AbstractCegarLoop]: Abstraction has 8450 states and 25660 transitions. [2021-06-05 05:35:19,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 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 05:35:19,464 INFO L276 IsEmpty]: Start isEmpty. Operand 8450 states and 25660 transitions. [2021-06-05 05:35:19,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:35:19,473 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:35:19,473 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:35:19,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:35:19,679 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:35:19,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:35:19,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1630842670, now seen corresponding path program 84 times [2021-06-05 05:35:19,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:35:19,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729755770] [2021-06-05 05:35:19,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:35:19,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:35:20,004 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:35:20,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:35:20,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729755770] [2021-06-05 05:35:20,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729755770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:35:20,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173323235] [2021-06-05 05:35:20,004 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 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 05:35:20,033 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:35:20,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:35:20,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:35:20,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:35:20,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:35:20,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:35:20,368 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 31 treesize of output 19 [2021-06-05 05:35:20,369 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:35:20,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:35:20,378 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 05:35:20,378 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:28 [2021-06-05 05:35:20,433 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:35:20,434 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 29 treesize of output 17 [2021-06-05 05:35:20,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:35:20,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:35:20,443 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 05:35:20,443 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:17 [2021-06-05 05:35:20,575 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:35:20,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173323235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:35:20,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:35:20,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-06-05 05:35:20,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231435294] [2021-06-05 05:35:20,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:35:20,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:35:20,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:35:20,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1069, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:35:20,576 INFO L87 Difference]: Start difference. First operand 8450 states and 25660 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 05:35:23,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:35:23,019 INFO L93 Difference]: Finished difference Result 13844 states and 40921 transitions. [2021-06-05 05:35:23,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 05:35:23,020 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 05:35:23,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:35:23,039 INFO L225 Difference]: With dead ends: 13844 [2021-06-05 05:35:23,039 INFO L226 Difference]: Without dead ends: 13638 [2021-06-05 05:35:23,040 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1605 ImplicationChecksByTransitivity, 2009.6ms TimeCoverageRelationStatistics Valid=612, Invalid=5550, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 05:35:23,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13638 states. [2021-06-05 05:35:23,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13638 to 8552. [2021-06-05 05:35:23,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8552 states, 8551 states have (on average 3.0321599812887383) internal successors, (25928), 8551 states have internal predecessors, (25928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:35:23,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8552 states to 8552 states and 25928 transitions. [2021-06-05 05:35:23,206 INFO L78 Accepts]: Start accepts. Automaton has 8552 states and 25928 transitions. Word has length 37 [2021-06-05 05:35:23,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:35:23,206 INFO L482 AbstractCegarLoop]: Abstraction has 8552 states and 25928 transitions. [2021-06-05 05:35:23,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 05:35:23,206 INFO L276 IsEmpty]: Start isEmpty. Operand 8552 states and 25928 transitions. [2021-06-05 05:35:23,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:35:23,215 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:35:23,215 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:35:23,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:35:23,416 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:35:23,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:35:23,416 INFO L82 PathProgramCache]: Analyzing trace with hash -967818386, now seen corresponding path program 85 times [2021-06-05 05:35:23,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:35:23,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744488126] [2021-06-05 05:35:23,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:35:23,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:35:23,726 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:35:23,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:35:23,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744488126] [2021-06-05 05:35:23,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744488126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:35:23,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819308918] [2021-06-05 05:35:23,726 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 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 05:35:23,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:35:23,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:35:23,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:35:24,059 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:35:24,059 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 25 treesize of output 13 [2021-06-05 05:35:24,060 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:35:24,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:35:24,066 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 05:35:24,066 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 05:35:24,140 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:35:24,140 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 29 treesize of output 17 [2021-06-05 05:35:24,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:35:24,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:35:24,148 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 05:35:24,148 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:35:24,342 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:35:24,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819308918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:35:24,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:35:24,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2021-06-05 05:35:24,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123756231] [2021-06-05 05:35:24,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:35:24,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:35:24,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:35:24,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1179, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:35:24,344 INFO L87 Difference]: Start difference. First operand 8552 states and 25928 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 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 05:35:26,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:35:26,603 INFO L93 Difference]: Finished difference Result 9940 states and 29928 transitions. [2021-06-05 05:35:26,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:35:26,603 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 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 05:35:26,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:35:26,615 INFO L225 Difference]: With dead ends: 9940 [2021-06-05 05:35:26,616 INFO L226 Difference]: Without dead ends: 9708 [2021-06-05 05:35:26,616 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 1635.0ms TimeCoverageRelationStatistics Valid=218, Invalid=3088, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 05:35:26,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9708 states. [2021-06-05 05:35:26,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9708 to 8492. [2021-06-05 05:35:26,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8492 states, 8491 states have (on average 3.035802614533035) internal successors, (25777), 8491 states have internal predecessors, (25777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:35:26,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8492 states to 8492 states and 25777 transitions. [2021-06-05 05:35:26,726 INFO L78 Accepts]: Start accepts. Automaton has 8492 states and 25777 transitions. Word has length 37 [2021-06-05 05:35:26,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:35:26,726 INFO L482 AbstractCegarLoop]: Abstraction has 8492 states and 25777 transitions. [2021-06-05 05:35:26,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 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 05:35:26,726 INFO L276 IsEmpty]: Start isEmpty. Operand 8492 states and 25777 transitions. [2021-06-05 05:35:26,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:35:26,736 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:35:26,736 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:35:26,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:35:26,936 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:35:26,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:35:26,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1202081642, now seen corresponding path program 86 times [2021-06-05 05:35:26,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:35:26,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763357845] [2021-06-05 05:35:26,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:35:26,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:35:27,234 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:35:27,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:35:27,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763357845] [2021-06-05 05:35:27,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763357845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:35:27,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970124560] [2021-06-05 05:35:27,235 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 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 05:35:27,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:35:27,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:35:27,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:35:27,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:35:27,499 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:35:27,500 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 27 treesize of output 15 [2021-06-05 05:35:27,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:35:27,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:35:27,507 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 05:35:27,507 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 05:35:27,682 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:35:27,683 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 29 treesize of output 17 [2021-06-05 05:35:27,684 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:35:27,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:35:27,689 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 05:35:27,689 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:35:27,867 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:35:27,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970124560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:35:27,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:35:27,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:35:27,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949222005] [2021-06-05 05:35:27,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:35:27,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:35:27,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:35:27,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1237, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:35:27,868 INFO L87 Difference]: Start difference. First operand 8492 states and 25777 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:35:31,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:35:31,906 INFO L93 Difference]: Finished difference Result 15143 states and 44874 transitions. [2021-06-05 05:35:31,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 05:35:31,907 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:35:31,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:35:31,927 INFO L225 Difference]: With dead ends: 15143 [2021-06-05 05:35:31,928 INFO L226 Difference]: Without dead ends: 14864 [2021-06-05 05:35:31,928 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2075 ImplicationChecksByTransitivity, 2970.8ms TimeCoverageRelationStatistics Valid=751, Invalid=7991, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 05:35:31,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14864 states. [2021-06-05 05:35:32,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14864 to 8576. [2021-06-05 05:35:32,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8576 states, 8575 states have (on average 3.033586005830904) internal successors, (26013), 8575 states have internal predecessors, (26013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:35:32,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8576 states to 8576 states and 26013 transitions. [2021-06-05 05:35:32,078 INFO L78 Accepts]: Start accepts. Automaton has 8576 states and 26013 transitions. Word has length 37 [2021-06-05 05:35:32,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:35:32,078 INFO L482 AbstractCegarLoop]: Abstraction has 8576 states and 26013 transitions. [2021-06-05 05:35:32,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:35:32,078 INFO L276 IsEmpty]: Start isEmpty. Operand 8576 states and 26013 transitions. [2021-06-05 05:35:32,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:35:32,087 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:35:32,087 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:35:32,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-05 05:35:32,288 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:35:32,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:35:32,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1396579414, now seen corresponding path program 87 times [2021-06-05 05:35:32,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:35:32,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012954151] [2021-06-05 05:35:32,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:35:32,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:35:32,606 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:35:32,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:35:32,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012954151] [2021-06-05 05:35:32,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012954151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:35:32,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423907023] [2021-06-05 05:35:32,607 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 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 05:35:32,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:35:32,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:35:32,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:35:32,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:35:32,861 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:35:32,861 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 31 treesize of output 19 [2021-06-05 05:35:32,862 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:35:32,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:35:32,869 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 05:35:32,869 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:33 [2021-06-05 05:35:33,045 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:35:33,046 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 43 treesize of output 23 [2021-06-05 05:35:33,047 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:35:33,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:35:33,052 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 05:35:33,052 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:20 [2021-06-05 05:35:33,246 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:35:33,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423907023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:35:33,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:35:33,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:35:33,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905886482] [2021-06-05 05:35:33,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:35:33,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:35:33,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:35:33,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:35:33,247 INFO L87 Difference]: Start difference. First operand 8576 states and 26013 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:35:35,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:35:35,641 INFO L93 Difference]: Finished difference Result 9895 states and 29814 transitions. [2021-06-05 05:35:35,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:35:35,642 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:35:35,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:35:35,654 INFO L225 Difference]: With dead ends: 9895 [2021-06-05 05:35:35,654 INFO L226 Difference]: Without dead ends: 9666 [2021-06-05 05:35:35,655 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 1625.1ms TimeCoverageRelationStatistics Valid=212, Invalid=3094, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 05:35:35,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9666 states. [2021-06-05 05:35:35,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9666 to 8549. [2021-06-05 05:35:35,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8549 states, 8548 states have (on average 3.0354468881609735) internal successors, (25947), 8548 states have internal predecessors, (25947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:35:35,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8549 states to 8549 states and 25947 transitions. [2021-06-05 05:35:35,771 INFO L78 Accepts]: Start accepts. Automaton has 8549 states and 25947 transitions. Word has length 37 [2021-06-05 05:35:35,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:35:35,772 INFO L482 AbstractCegarLoop]: Abstraction has 8549 states and 25947 transitions. [2021-06-05 05:35:35,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:35:35,772 INFO L276 IsEmpty]: Start isEmpty. Operand 8549 states and 25947 transitions. [2021-06-05 05:35:35,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:35:35,781 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:35:35,781 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:35:35,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-06-05 05:35:35,982 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:35:35,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:35:35,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1739468890, now seen corresponding path program 88 times [2021-06-05 05:35:35,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:35:35,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284257825] [2021-06-05 05:35:35,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:35:35,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:35:36,289 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:35:36,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:35:36,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284257825] [2021-06-05 05:35:36,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284257825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:35:36,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990770706] [2021-06-05 05:35:36,290 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 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 05:35:36,315 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:35:36,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:35:36,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:35:36,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:35:36,532 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:35:36,532 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 31 treesize of output 15 [2021-06-05 05:35:36,533 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:35:36,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:35:36,540 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 05:35:36,540 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:32 [2021-06-05 05:35:36,718 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:35:36,719 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 29 treesize of output 17 [2021-06-05 05:35:36,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:35:36,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:35:36,725 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 05:35:36,725 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:35:36,909 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:35:36,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990770706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:35:36,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:35:36,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:35:36,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950487034] [2021-06-05 05:35:36,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:35:36,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:35:36,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:35:36,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1239, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:35:36,910 INFO L87 Difference]: Start difference. First operand 8549 states and 25947 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:35:40,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:35:40,187 INFO L93 Difference]: Finished difference Result 12814 states and 38064 transitions. [2021-06-05 05:35:40,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 05:35:40,187 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:35:40,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:35:40,206 INFO L225 Difference]: With dead ends: 12814 [2021-06-05 05:35:40,206 INFO L226 Difference]: Without dead ends: 12632 [2021-06-05 05:35:40,207 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1338 ImplicationChecksByTransitivity, 2456.7ms TimeCoverageRelationStatistics Valid=539, Invalid=6103, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 05:35:40,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12632 states. [2021-06-05 05:35:40,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12632 to 8624. [2021-06-05 05:35:40,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8624 states, 8623 states have (on average 3.0339788936565) internal successors, (26162), 8623 states have internal predecessors, (26162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:35:40,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8624 states to 8624 states and 26162 transitions. [2021-06-05 05:35:40,350 INFO L78 Accepts]: Start accepts. Automaton has 8624 states and 26162 transitions. Word has length 37 [2021-06-05 05:35:40,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:35:40,350 INFO L482 AbstractCegarLoop]: Abstraction has 8624 states and 26162 transitions. [2021-06-05 05:35:40,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:35:40,350 INFO L276 IsEmpty]: Start isEmpty. Operand 8624 states and 26162 transitions. [2021-06-05 05:35:40,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:35:40,360 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:35:40,360 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:35:40,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:35:40,560 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:35:40,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:35:40,560 INFO L82 PathProgramCache]: Analyzing trace with hash -43162650, now seen corresponding path program 89 times [2021-06-05 05:35:40,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:35:40,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004327240] [2021-06-05 05:35:40,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:35:40,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:35:40,894 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:35:40,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:35:40,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004327240] [2021-06-05 05:35:40,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004327240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:35:40,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719424882] [2021-06-05 05:35:40,895 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 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 05:35:40,921 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:35:40,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:35:40,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 05:35:40,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:35:41,130 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:35:41,130 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 38 treesize of output 22 [2021-06-05 05:35:41,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:35:41,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:35:41,139 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 05:35:41,139 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:27 [2021-06-05 05:35:41,233 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:35:41,233 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 27 treesize of output 15 [2021-06-05 05:35:41,234 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:35:41,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:35:41,238 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 05:35:41,238 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:15 [2021-06-05 05:35:41,397 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:35:41,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719424882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:35:41,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:35:41,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-06-05 05:35:41,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355368696] [2021-06-05 05:35:41,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:35:41,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:35:41,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:35:41,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1105, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:35:41,398 INFO L87 Difference]: Start difference. First operand 8624 states and 26162 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 05:35:43,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:35:43,022 INFO L93 Difference]: Finished difference Result 10198 states and 30751 transitions. [2021-06-05 05:35:43,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 05:35:43,022 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 05:35:43,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:35:43,036 INFO L225 Difference]: With dead ends: 10198 [2021-06-05 05:35:43,036 INFO L226 Difference]: Without dead ends: 9953 [2021-06-05 05:35:43,036 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 1189.5ms TimeCoverageRelationStatistics Valid=195, Invalid=2457, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 05:35:43,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9953 states. [2021-06-05 05:35:43,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9953 to 8534. [2021-06-05 05:35:43,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8534 states, 8533 states have (on average 3.0375014649009726) internal successors, (25919), 8533 states have internal predecessors, (25919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:35:43,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8534 states to 8534 states and 25919 transitions. [2021-06-05 05:35:43,168 INFO L78 Accepts]: Start accepts. Automaton has 8534 states and 25919 transitions. Word has length 37 [2021-06-05 05:35:43,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:35:43,168 INFO L482 AbstractCegarLoop]: Abstraction has 8534 states and 25919 transitions. [2021-06-05 05:35:43,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 05:35:43,168 INFO L276 IsEmpty]: Start isEmpty. Operand 8534 states and 25919 transitions. [2021-06-05 05:35:43,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:35:43,178 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:35:43,178 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:35:43,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:35:43,381 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:35:43,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:35:43,381 INFO L82 PathProgramCache]: Analyzing trace with hash 739816670, now seen corresponding path program 90 times [2021-06-05 05:35:43,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:35:43,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525937784] [2021-06-05 05:35:43,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:35:43,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:35:43,795 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:35:43,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:35:43,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525937784] [2021-06-05 05:35:43,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525937784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:35:43,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021596218] [2021-06-05 05:35:43,795 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 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 05:35:43,826 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:35:43,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:35:43,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:35:43,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:35:44,074 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:35:44,074 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 31 treesize of output 19 [2021-06-05 05:35:44,075 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:35:44,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:35:44,080 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 05:35:44,080 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:28 [2021-06-05 05:35:44,135 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:35:44,135 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 29 treesize of output 17 [2021-06-05 05:35:44,136 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:35:44,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:35:44,141 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 05:35:44,141 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:17 [2021-06-05 05:35:44,218 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:35:44,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021596218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:35:44,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:35:44,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 14] total 34 [2021-06-05 05:35:44,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337264544] [2021-06-05 05:35:44,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:35:44,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:35:44,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:35:44,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1069, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:35:44,219 INFO L87 Difference]: Start difference. First operand 8534 states and 25919 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 05:35:45,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:35:45,909 INFO L93 Difference]: Finished difference Result 12951 states and 38342 transitions. [2021-06-05 05:35:45,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 05:35:45,909 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 05:35:45,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:35:45,929 INFO L225 Difference]: With dead ends: 12951 [2021-06-05 05:35:45,929 INFO L226 Difference]: Without dead ends: 12674 [2021-06-05 05:35:45,929 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1207 ImplicationChecksByTransitivity, 1666.6ms TimeCoverageRelationStatistics Valid=500, Invalid=4330, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 05:35:45,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12674 states. [2021-06-05 05:35:46,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12674 to 8696. [2021-06-05 05:35:46,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8696 states, 8695 states have (on average 3.0357676825761932) internal successors, (26396), 8695 states have internal predecessors, (26396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:35:46,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8696 states to 8696 states and 26396 transitions. [2021-06-05 05:35:46,077 INFO L78 Accepts]: Start accepts. Automaton has 8696 states and 26396 transitions. Word has length 37 [2021-06-05 05:35:46,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:35:46,077 INFO L482 AbstractCegarLoop]: Abstraction has 8696 states and 26396 transitions. [2021-06-05 05:35:46,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 05:35:46,077 INFO L276 IsEmpty]: Start isEmpty. Operand 8696 states and 26396 transitions. [2021-06-05 05:35:46,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:35:46,087 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:35:46,087 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:35:46,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:35:46,303 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:35:46,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:35:46,303 INFO L82 PathProgramCache]: Analyzing trace with hash 311055642, now seen corresponding path program 91 times [2021-06-05 05:35:46,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:35:46,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106499963] [2021-06-05 05:35:46,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:35:46,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:35:46,725 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:35:46,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:35:46,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106499963] [2021-06-05 05:35:46,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106499963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:35:46,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069331344] [2021-06-05 05:35:46,726 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 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 05:35:46,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:35:46,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:35:46,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:35:46,958 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:35:46,958 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 29 treesize of output 13 [2021-06-05 05:35:46,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:35:46,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:35:46,966 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 05:35:46,966 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:29 [2021-06-05 05:35:47,127 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:35:47,127 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 29 treesize of output 17 [2021-06-05 05:35:47,128 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:35:47,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:35:47,134 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 05:35:47,134 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:35:47,305 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:35:47,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069331344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:35:47,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:35:47,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 05:35:47,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204631942] [2021-06-05 05:35:47,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:35:47,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:35:47,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:35:47,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1376, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:35:47,306 INFO L87 Difference]: Start difference. First operand 8696 states and 26396 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:35:50,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:35:50,758 INFO L93 Difference]: Finished difference Result 13049 states and 38753 transitions. [2021-06-05 05:35:50,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 05:35:50,759 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:35:50,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:35:50,777 INFO L225 Difference]: With dead ends: 13049 [2021-06-05 05:35:50,777 INFO L226 Difference]: Without dead ends: 12867 [2021-06-05 05:35:50,778 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1690 ImplicationChecksByTransitivity, 2492.0ms TimeCoverageRelationStatistics Valid=664, Invalid=6476, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 05:35:50,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12867 states. [2021-06-05 05:35:50,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12867 to 8774. [2021-06-05 05:35:50,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8774 states, 8773 states have (on average 3.033853869827881) internal successors, (26616), 8773 states have internal predecessors, (26616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:35:50,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8774 states to 8774 states and 26616 transitions. [2021-06-05 05:35:50,915 INFO L78 Accepts]: Start accepts. Automaton has 8774 states and 26616 transitions. Word has length 37 [2021-06-05 05:35:50,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:35:50,915 INFO L482 AbstractCegarLoop]: Abstraction has 8774 states and 26616 transitions. [2021-06-05 05:35:50,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:35:50,915 INFO L276 IsEmpty]: Start isEmpty. Operand 8774 states and 26616 transitions. [2021-06-05 05:35:50,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:35:50,925 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:35:50,925 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:35:51,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:35:51,125 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:35:51,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:35:51,126 INFO L82 PathProgramCache]: Analyzing trace with hash 2007361882, now seen corresponding path program 92 times [2021-06-05 05:35:51,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:35:51,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371502041] [2021-06-05 05:35:51,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:35:51,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:35:51,451 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:35:51,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:35:51,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371502041] [2021-06-05 05:35:51,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371502041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:35:51,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186947646] [2021-06-05 05:35:51,451 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 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 05:35:51,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:35:51,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:35:51,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:35:51,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:35:51,681 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:35:51,681 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 38 treesize of output 22 [2021-06-05 05:35:51,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:35:51,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:35:51,689 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 05:35:51,689 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:33 [2021-06-05 05:35:51,778 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:35:51,779 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 36 treesize of output 20 [2021-06-05 05:35:51,780 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:35:51,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:35:51,784 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 05:35:51,784 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:17 [2021-06-05 05:35:51,944 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:35:51,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186947646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:35:51,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:35:51,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-06-05 05:35:51,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438286652] [2021-06-05 05:35:51,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:35:51,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:35:51,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:35:51,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1105, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:35:51,945 INFO L87 Difference]: Start difference. First operand 8774 states and 26616 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 05:35:53,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:35:53,620 INFO L93 Difference]: Finished difference Result 10209 states and 30738 transitions. [2021-06-05 05:35:53,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:35:53,620 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 05:35:53,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:35:53,632 INFO L225 Difference]: With dead ends: 10209 [2021-06-05 05:35:53,633 INFO L226 Difference]: Without dead ends: 9998 [2021-06-05 05:35:53,633 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1188.8ms TimeCoverageRelationStatistics Valid=201, Invalid=2451, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 05:35:53,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9998 states. [2021-06-05 05:35:53,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9998 to 8843. [2021-06-05 05:35:53,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8843 states, 8842 states have (on average 3.033476589007012) internal successors, (26822), 8842 states have internal predecessors, (26822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:35:53,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8843 states to 8843 states and 26822 transitions. [2021-06-05 05:35:53,761 INFO L78 Accepts]: Start accepts. Automaton has 8843 states and 26822 transitions. Word has length 37 [2021-06-05 05:35:53,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:35:53,761 INFO L482 AbstractCegarLoop]: Abstraction has 8843 states and 26822 transitions. [2021-06-05 05:35:53,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 05:35:53,761 INFO L276 IsEmpty]: Start isEmpty. Operand 8843 states and 26822 transitions. [2021-06-05 05:35:53,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:35:53,771 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:35:53,771 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:35:53,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-06-05 05:35:53,972 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:35:53,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:35:53,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1433308364, now seen corresponding path program 93 times [2021-06-05 05:35:53,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:35:53,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045622392] [2021-06-05 05:35:53,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:35:53,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:35:54,317 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:35:54,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:35:54,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045622392] [2021-06-05 05:35:54,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045622392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:35:54,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352696332] [2021-06-05 05:35:54,318 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 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 05:35:54,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:35:54,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:35:54,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:35:54,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:35:54,551 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:35:54,552 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 27 treesize of output 15 [2021-06-05 05:35:54,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:35:54,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:35:54,559 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 05:35:54,559 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 05:35:54,735 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:35:54,735 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 29 treesize of output 17 [2021-06-05 05:35:54,741 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:35:54,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:35:54,747 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 05:35:54,747 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:35:54,920 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:35:54,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352696332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:35:54,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:35:54,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 05:35:54,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812835678] [2021-06-05 05:35:54,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:35:54,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:35:54,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:35:54,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1376, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:35:54,921 INFO L87 Difference]: Start difference. First operand 8843 states and 26822 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:35:58,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:35:58,271 INFO L93 Difference]: Finished difference Result 13498 states and 40126 transitions. [2021-06-05 05:35:58,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 05:35:58,272 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:35:58,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:35:58,290 INFO L225 Difference]: With dead ends: 13498 [2021-06-05 05:35:58,290 INFO L226 Difference]: Without dead ends: 13328 [2021-06-05 05:35:58,291 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1763 ImplicationChecksByTransitivity, 2543.7ms TimeCoverageRelationStatistics Valid=650, Invalid=6660, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 05:35:58,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13328 states. [2021-06-05 05:35:58,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13328 to 8822. [2021-06-05 05:35:58,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8822 states, 8821 states have (on average 3.033556286135359) internal successors, (26759), 8821 states have internal predecessors, (26759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:35:58,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8822 states to 8822 states and 26759 transitions. [2021-06-05 05:35:58,429 INFO L78 Accepts]: Start accepts. Automaton has 8822 states and 26759 transitions. Word has length 37 [2021-06-05 05:35:58,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:35:58,429 INFO L482 AbstractCegarLoop]: Abstraction has 8822 states and 26759 transitions. [2021-06-05 05:35:58,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:35:58,429 INFO L276 IsEmpty]: Start isEmpty. Operand 8822 states and 26759 transitions. [2021-06-05 05:35:58,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:35:58,439 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:35:58,439 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:35:58,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-06-05 05:35:58,639 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:35:58,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:35:58,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1826477636, now seen corresponding path program 94 times [2021-06-05 05:35:58,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:35:58,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28369444] [2021-06-05 05:35:58,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:35:58,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:35:58,974 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:35:58,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:35:58,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28369444] [2021-06-05 05:35:58,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28369444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:35:58,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272833732] [2021-06-05 05:35:58,975 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 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 05:35:59,000 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:35:59,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:35:59,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:35:59,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:35:59,210 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:35:59,210 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 29 treesize of output 13 [2021-06-05 05:35:59,211 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:35:59,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:35:59,218 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 05:35:59,218 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:29 [2021-06-05 05:35:59,422 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:35:59,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 05:35:59,423 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:35:59,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:35:59,429 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 05:35:59,429 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:35:59,600 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:35:59,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272833732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:35:59,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:35:59,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 05:35:59,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881414625] [2021-06-05 05:35:59,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:35:59,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:35:59,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:35:59,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1377, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:35:59,601 INFO L87 Difference]: Start difference. First operand 8822 states and 26759 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:36:02,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:36:02,670 INFO L93 Difference]: Finished difference Result 13664 states and 40658 transitions. [2021-06-05 05:36:02,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 05:36:02,671 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:36:02,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:36:02,689 INFO L225 Difference]: With dead ends: 13664 [2021-06-05 05:36:02,690 INFO L226 Difference]: Without dead ends: 13491 [2021-06-05 05:36:02,690 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1545 ImplicationChecksByTransitivity, 2317.7ms TimeCoverageRelationStatistics Valid=554, Invalid=6088, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 05:36:02,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13491 states. [2021-06-05 05:36:02,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13491 to 8717. [2021-06-05 05:36:02,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8717 states, 8716 states have (on average 3.0353373106929786) internal successors, (26456), 8716 states have internal predecessors, (26456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:36:02,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8717 states to 8717 states and 26456 transitions. [2021-06-05 05:36:02,837 INFO L78 Accepts]: Start accepts. Automaton has 8717 states and 26456 transitions. Word has length 37 [2021-06-05 05:36:02,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:36:02,837 INFO L482 AbstractCegarLoop]: Abstraction has 8717 states and 26456 transitions. [2021-06-05 05:36:02,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:36:02,838 INFO L276 IsEmpty]: Start isEmpty. Operand 8717 states and 26456 transitions. [2021-06-05 05:36:02,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:36:02,847 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:36:02,847 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:36:03,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:36:03,048 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:36:03,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:36:03,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1664472406, now seen corresponding path program 95 times [2021-06-05 05:36:03,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:36:03,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908881555] [2021-06-05 05:36:03,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:36:03,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:36:03,380 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:36:03,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:36:03,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908881555] [2021-06-05 05:36:03,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908881555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:36:03,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395307279] [2021-06-05 05:36:03,381 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 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 05:36:03,407 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:36:03,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:36:03,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:36:03,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:36:03,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:36:03,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:36:03,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:36:03,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:36:03,695 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 27 treesize of output 15 [2021-06-05 05:36:03,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:36:03,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:36:03,707 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 05:36:03,707 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:58, output treesize:32 [2021-06-05 05:36:03,910 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:36:03,911 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 29 treesize of output 17 [2021-06-05 05:36:03,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:36:03,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:36:03,917 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 05:36:03,917 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:36:04,099 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:36:04,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395307279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:36:04,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:36:04,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 05:36:04,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008679155] [2021-06-05 05:36:04,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:36:04,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:36:04,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:36:04,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1376, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:36:04,100 INFO L87 Difference]: Start difference. First operand 8717 states and 26456 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:36:07,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:36:07,381 INFO L93 Difference]: Finished difference Result 13319 states and 39727 transitions. [2021-06-05 05:36:07,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 05:36:07,381 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:36:07,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:36:07,401 INFO L225 Difference]: With dead ends: 13319 [2021-06-05 05:36:07,401 INFO L226 Difference]: Without dead ends: 13137 [2021-06-05 05:36:07,402 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1560 ImplicationChecksByTransitivity, 2382.5ms TimeCoverageRelationStatistics Valid=536, Invalid=6106, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 05:36:07,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13137 states. [2021-06-05 05:36:07,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13137 to 8772. [2021-06-05 05:36:07,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8772 states, 8771 states have (on average 3.033405540987345) internal successors, (26606), 8771 states have internal predecessors, (26606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:36:07,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8772 states to 8772 states and 26606 transitions. [2021-06-05 05:36:07,546 INFO L78 Accepts]: Start accepts. Automaton has 8772 states and 26606 transitions. Word has length 37 [2021-06-05 05:36:07,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:36:07,546 INFO L482 AbstractCegarLoop]: Abstraction has 8772 states and 26606 transitions. [2021-06-05 05:36:07,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:36:07,546 INFO L276 IsEmpty]: Start isEmpty. Operand 8772 states and 26606 transitions. [2021-06-05 05:36:07,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:36:07,556 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:36:07,556 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:36:07,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2021-06-05 05:36:07,769 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:36:07,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:36:07,769 INFO L82 PathProgramCache]: Analyzing trace with hash -934188650, now seen corresponding path program 96 times [2021-06-05 05:36:07,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:36:07,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830800909] [2021-06-05 05:36:07,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:36:07,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:36:08,067 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:36:08,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:36:08,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830800909] [2021-06-05 05:36:08,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830800909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:36:08,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250378297] [2021-06-05 05:36:08,068 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 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 05:36:08,094 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:36:08,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:36:08,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:36:08,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:36:08,308 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:36:08,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 05:36:08,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:36:08,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:36:08,316 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 05:36:08,316 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:33 [2021-06-05 05:36:08,567 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:36:08,567 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 43 treesize of output 23 [2021-06-05 05:36:08,568 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:36:08,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:36:08,574 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 05:36:08,574 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:20 [2021-06-05 05:36:08,765 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:36:08,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250378297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:36:08,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:36:08,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:36:08,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613600128] [2021-06-05 05:36:08,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:36:08,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:36:08,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:36:08,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:36:08,766 INFO L87 Difference]: Start difference. First operand 8772 states and 26606 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:36:11,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:36:11,326 INFO L93 Difference]: Finished difference Result 10119 states and 30529 transitions. [2021-06-05 05:36:11,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:36:11,327 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:36:11,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:36:11,341 INFO L225 Difference]: With dead ends: 10119 [2021-06-05 05:36:11,341 INFO L226 Difference]: Without dead ends: 9895 [2021-06-05 05:36:11,341 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 1674.5ms TimeCoverageRelationStatistics Valid=236, Invalid=3424, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 05:36:11,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9895 states. [2021-06-05 05:36:11,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9895 to 8730. [2021-06-05 05:36:11,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8730 states, 8729 states have (on average 3.0362011685187307) internal successors, (26503), 8729 states have internal predecessors, (26503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:36:11,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8730 states to 8730 states and 26503 transitions. [2021-06-05 05:36:11,511 INFO L78 Accepts]: Start accepts. Automaton has 8730 states and 26503 transitions. Word has length 37 [2021-06-05 05:36:11,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:36:11,512 INFO L482 AbstractCegarLoop]: Abstraction has 8730 states and 26503 transitions. [2021-06-05 05:36:11,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:36:11,512 INFO L276 IsEmpty]: Start isEmpty. Operand 8730 states and 26503 transitions. [2021-06-05 05:36:11,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:36:11,521 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:36:11,521 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:36:11,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:36:11,722 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:36:11,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:36:11,722 INFO L82 PathProgramCache]: Analyzing trace with hash 2051432632, now seen corresponding path program 97 times [2021-06-05 05:36:11,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:36:11,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155424348] [2021-06-05 05:36:11,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:36:11,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:36:12,068 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:36:12,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:36:12,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155424348] [2021-06-05 05:36:12,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155424348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:36:12,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913581326] [2021-06-05 05:36:12,069 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 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 05:36:12,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:36:12,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:36:12,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:36:12,271 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:36:12,271 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 31 treesize of output 15 [2021-06-05 05:36:12,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:36:12,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:36:12,278 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 05:36:12,278 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:27 [2021-06-05 05:36:12,466 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:36:12,466 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 29 treesize of output 17 [2021-06-05 05:36:12,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:36:12,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:36:12,473 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 05:36:12,473 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:36:12,640 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:36:12,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913581326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:36:12,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:36:12,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 05:36:12,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854978192] [2021-06-05 05:36:12,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:36:12,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:36:12,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:36:12,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:36:12,641 INFO L87 Difference]: Start difference. First operand 8730 states and 26503 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:36:15,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:36:15,609 INFO L93 Difference]: Finished difference Result 13225 states and 39211 transitions. [2021-06-05 05:36:15,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 05:36:15,609 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:36:15,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:36:15,628 INFO L225 Difference]: With dead ends: 13225 [2021-06-05 05:36:15,628 INFO L226 Difference]: Without dead ends: 13043 [2021-06-05 05:36:15,628 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 2350.8ms TimeCoverageRelationStatistics Valid=645, Invalid=6327, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 05:36:15,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13043 states. [2021-06-05 05:36:15,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13043 to 8868. [2021-06-05 05:36:15,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8868 states, 8867 states have (on average 3.0340588699672946) internal successors, (26903), 8867 states have internal predecessors, (26903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:36:15,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8868 states to 8868 states and 26903 transitions. [2021-06-05 05:36:15,776 INFO L78 Accepts]: Start accepts. Automaton has 8868 states and 26903 transitions. Word has length 37 [2021-06-05 05:36:15,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:36:15,776 INFO L482 AbstractCegarLoop]: Abstraction has 8868 states and 26903 transitions. [2021-06-05 05:36:15,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:36:15,777 INFO L276 IsEmpty]: Start isEmpty. Operand 8868 states and 26903 transitions. [2021-06-05 05:36:15,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:36:15,787 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:36:15,787 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:36:15,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:36:15,989 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:36:15,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:36:15,989 INFO L82 PathProgramCache]: Analyzing trace with hash -547228424, now seen corresponding path program 98 times [2021-06-05 05:36:15,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:36:15,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266839121] [2021-06-05 05:36:15,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:36:15,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:36:16,290 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:36:16,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:36:16,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266839121] [2021-06-05 05:36:16,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266839121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:36:16,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776272321] [2021-06-05 05:36:16,291 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 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 05:36:16,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:36:16,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:36:16,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:36:16,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:36:16,500 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:36:16,500 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 27 treesize of output 15 [2021-06-05 05:36:16,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:36:16,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:36:16,507 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 05:36:16,507 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 05:36:16,709 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:36:16,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 05:36:16,718 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:36:16,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:36:16,724 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 05:36:16,724 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:36:16,952 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:36:16,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776272321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:36:16,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:36:16,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:36:16,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681699348] [2021-06-05 05:36:16,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:36:16,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:36:16,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:36:16,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:36:16,953 INFO L87 Difference]: Start difference. First operand 8868 states and 26903 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:36:19,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:36:19,541 INFO L93 Difference]: Finished difference Result 9926 states and 29891 transitions. [2021-06-05 05:36:19,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 05:36:19,541 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:36:19,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:36:19,555 INFO L225 Difference]: With dead ends: 9926 [2021-06-05 05:36:19,555 INFO L226 Difference]: Without dead ends: 9723 [2021-06-05 05:36:19,555 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 1943.0ms TimeCoverageRelationStatistics Valid=282, Invalid=3878, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 05:36:19,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9723 states. [2021-06-05 05:36:19,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9723 to 8853. [2021-06-05 05:36:19,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8853 states, 8852 states have (on average 3.0353592408495254) internal successors, (26869), 8852 states have internal predecessors, (26869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:36:19,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8853 states to 8853 states and 26869 transitions. [2021-06-05 05:36:19,676 INFO L78 Accepts]: Start accepts. Automaton has 8853 states and 26869 transitions. Word has length 37 [2021-06-05 05:36:19,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:36:19,676 INFO L482 AbstractCegarLoop]: Abstraction has 8853 states and 26869 transitions. [2021-06-05 05:36:19,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:36:19,676 INFO L276 IsEmpty]: Start isEmpty. Operand 8853 states and 26869 transitions. [2021-06-05 05:36:19,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:36:19,686 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:36:19,686 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:36:19,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-05 05:36:19,886 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:36:19,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:36:19,886 INFO L82 PathProgramCache]: Analyzing trace with hash 307068626, now seen corresponding path program 99 times [2021-06-05 05:36:19,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:36:19,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111126005] [2021-06-05 05:36:19,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:36:19,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:36:20,240 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:36:20,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:36:20,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111126005] [2021-06-05 05:36:20,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111126005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:36:20,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485854211] [2021-06-05 05:36:20,241 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 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 05:36:20,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:36:20,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:36:20,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:36:20,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:36:20,492 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:36:20,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 05:36:20,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:36:20,499 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:36:20,499 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 05:36:20,499 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 05:36:20,699 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:36:20,699 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 29 treesize of output 17 [2021-06-05 05:36:20,700 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:36:20,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:36:20,706 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 05:36:20,706 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:36:20,873 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:36:20,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485854211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:36:20,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:36:20,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 05:36:20,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723084496] [2021-06-05 05:36:20,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:36:20,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:36:20,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:36:20,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:36:20,874 INFO L87 Difference]: Start difference. First operand 8853 states and 26869 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:36:24,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:36:24,119 INFO L93 Difference]: Finished difference Result 13518 states and 40103 transitions. [2021-06-05 05:36:24,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 05:36:24,120 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:36:24,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:36:24,137 INFO L225 Difference]: With dead ends: 13518 [2021-06-05 05:36:24,137 INFO L226 Difference]: Without dead ends: 13336 [2021-06-05 05:36:24,137 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1782 ImplicationChecksByTransitivity, 2517.7ms TimeCoverageRelationStatistics Valid=633, Invalid=6507, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 05:36:24,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13336 states. [2021-06-05 05:36:24,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13336 to 8853. [2021-06-05 05:36:24,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8853 states, 8852 states have (on average 3.033890646181654) internal successors, (26856), 8852 states have internal predecessors, (26856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:36:24,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8853 states to 8853 states and 26856 transitions. [2021-06-05 05:36:24,262 INFO L78 Accepts]: Start accepts. Automaton has 8853 states and 26856 transitions. Word has length 37 [2021-06-05 05:36:24,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:36:24,262 INFO L482 AbstractCegarLoop]: Abstraction has 8853 states and 26856 transitions. [2021-06-05 05:36:24,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:36:24,263 INFO L276 IsEmpty]: Start isEmpty. Operand 8853 states and 26856 transitions. [2021-06-05 05:36:24,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:36:24,271 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:36:24,271 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:36:24,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:36:24,472 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:36:24,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:36:24,472 INFO L82 PathProgramCache]: Analyzing trace with hash 2003374866, now seen corresponding path program 100 times [2021-06-05 05:36:24,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:36:24,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152300563] [2021-06-05 05:36:24,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:36:24,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:36:24,765 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:36:24,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:36:24,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152300563] [2021-06-05 05:36:24,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152300563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:36:24,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896662952] [2021-06-05 05:36:24,765 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 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 05:36:24,790 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:36:24,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:36:24,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:36:24,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:36:24,968 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:36:24,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 05:36:24,969 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:36:24,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:36:24,975 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 05:36:24,975 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:22 [2021-06-05 05:36:25,182 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:36:25,182 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 29 treesize of output 17 [2021-06-05 05:36:25,183 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:36:25,188 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:36:25,189 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 05:36:25,189 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:36:25,391 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:36:25,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896662952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:36:25,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:36:25,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:36:25,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264710663] [2021-06-05 05:36:25,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:36:25,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:36:25,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:36:25,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:36:25,392 INFO L87 Difference]: Start difference. First operand 8853 states and 26856 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:36:27,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:36:27,697 INFO L93 Difference]: Finished difference Result 10082 states and 30409 transitions. [2021-06-05 05:36:27,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 05:36:27,697 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:36:27,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:36:27,711 INFO L225 Difference]: With dead ends: 10082 [2021-06-05 05:36:27,711 INFO L226 Difference]: Without dead ends: 9918 [2021-06-05 05:36:27,712 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1652.6ms TimeCoverageRelationStatistics Valid=219, Invalid=3321, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 05:36:27,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9918 states. [2021-06-05 05:36:27,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9918 to 8847. [2021-06-05 05:36:27,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8847 states, 8846 states have (on average 3.034139724169116) internal successors, (26840), 8846 states have internal predecessors, (26840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:36:27,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8847 states to 8847 states and 26840 transitions. [2021-06-05 05:36:27,843 INFO L78 Accepts]: Start accepts. Automaton has 8847 states and 26840 transitions. Word has length 37 [2021-06-05 05:36:27,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:36:27,843 INFO L482 AbstractCegarLoop]: Abstraction has 8847 states and 26840 transitions. [2021-06-05 05:36:27,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:36:27,843 INFO L276 IsEmpty]: Start isEmpty. Operand 8847 states and 26840 transitions. [2021-06-05 05:36:27,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:36:27,853 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:36:27,853 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:36:28,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-06-05 05:36:28,054 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:36:28,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:36:28,054 INFO L82 PathProgramCache]: Analyzing trace with hash -177338290, now seen corresponding path program 101 times [2021-06-05 05:36:28,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:36:28,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068220365] [2021-06-05 05:36:28,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:36:28,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:36:28,348 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:36:28,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:36:28,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068220365] [2021-06-05 05:36:28,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068220365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:36:28,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579938324] [2021-06-05 05:36:28,348 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 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 05:36:28,375 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:36:28,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:36:28,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:36:28,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:36:28,552 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:36:28,553 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 27 treesize of output 15 [2021-06-05 05:36:28,553 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:36:28,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:36:28,559 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 05:36:28,559 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:25 [2021-06-05 05:36:28,711 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:36:28,712 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 32 treesize of output 20 [2021-06-05 05:36:28,712 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:36:28,717 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:36:28,717 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 05:36:28,717 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-06-05 05:36:28,852 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:36:28,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579938324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:36:28,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:36:28,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-06-05 05:36:28,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013569703] [2021-06-05 05:36:28,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:36:28,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:36:28,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:36:28,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1105, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:36:28,853 INFO L87 Difference]: Start difference. First operand 8847 states and 26840 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 05:36:30,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:36:30,689 INFO L93 Difference]: Finished difference Result 10413 states and 31212 transitions. [2021-06-05 05:36:30,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 05:36:30,689 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 05:36:30,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:36:30,703 INFO L225 Difference]: With dead ends: 10413 [2021-06-05 05:36:30,704 INFO L226 Difference]: Without dead ends: 10166 [2021-06-05 05:36:30,704 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 1392.7ms TimeCoverageRelationStatistics Valid=257, Invalid=3049, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 05:36:30,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10166 states. [2021-06-05 05:36:30,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10166 to 8964. [2021-06-05 05:36:30,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8964 states, 8963 states have (on average 3.0329130871360035) internal successors, (27184), 8963 states have internal predecessors, (27184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:36:30,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8964 states to 8964 states and 27184 transitions. [2021-06-05 05:36:30,830 INFO L78 Accepts]: Start accepts. Automaton has 8964 states and 27184 transitions. Word has length 37 [2021-06-05 05:36:30,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:36:30,830 INFO L482 AbstractCegarLoop]: Abstraction has 8964 states and 27184 transitions. [2021-06-05 05:36:30,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 05:36:30,830 INFO L276 IsEmpty]: Start isEmpty. Operand 8964 states and 27184 transitions. [2021-06-05 05:36:30,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:36:30,840 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:36:30,840 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:36:31,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:36:31,040 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:36:31,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:36:31,040 INFO L82 PathProgramCache]: Analyzing trace with hash -728112670, now seen corresponding path program 102 times [2021-06-05 05:36:31,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:36:31,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975733959] [2021-06-05 05:36:31,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:36:31,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:36:31,357 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:36:31,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:36:31,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975733959] [2021-06-05 05:36:31,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975733959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:36:31,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656766150] [2021-06-05 05:36:31,357 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 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 05:36:31,384 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:36:31,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:36:31,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:36:31,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:36:31,569 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:36:31,570 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 27 treesize of output 15 [2021-06-05 05:36:31,571 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:36:31,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:36:31,576 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 05:36:31,577 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:25 [2021-06-05 05:36:31,777 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:36:31,777 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 38 treesize of output 22 [2021-06-05 05:36:31,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:36:31,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:36:31,783 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 05:36:31,783 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:20 [2021-06-05 05:36:31,941 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:36:31,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656766150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:36:31,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:36:31,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 05:36:31,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635443806] [2021-06-05 05:36:31,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:36:31,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:36:31,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:36:31,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1376, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:36:31,942 INFO L87 Difference]: Start difference. First operand 8964 states and 27184 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:36:34,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:36:34,730 INFO L93 Difference]: Finished difference Result 13768 states and 40896 transitions. [2021-06-05 05:36:34,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 05:36:34,731 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:36:34,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:36:34,751 INFO L225 Difference]: With dead ends: 13768 [2021-06-05 05:36:34,751 INFO L226 Difference]: Without dead ends: 13595 [2021-06-05 05:36:34,752 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1556 ImplicationChecksByTransitivity, 2219.0ms TimeCoverageRelationStatistics Valid=539, Invalid=5941, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 05:36:34,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13595 states. [2021-06-05 05:36:34,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13595 to 8960. [2021-06-05 05:36:34,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8960 states, 8959 states have (on average 3.034936934925773) internal successors, (27190), 8959 states have internal predecessors, (27190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:36:34,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8960 states to 8960 states and 27190 transitions. [2021-06-05 05:36:34,899 INFO L78 Accepts]: Start accepts. Automaton has 8960 states and 27190 transitions. Word has length 37 [2021-06-05 05:36:34,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:36:34,899 INFO L482 AbstractCegarLoop]: Abstraction has 8960 states and 27190 transitions. [2021-06-05 05:36:34,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:36:34,899 INFO L276 IsEmpty]: Start isEmpty. Operand 8960 states and 27190 transitions. [2021-06-05 05:36:34,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:36:34,909 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:36:34,909 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:36:35,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:36:35,110 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:36:35,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:36:35,110 INFO L82 PathProgramCache]: Analyzing trace with hash -890117900, now seen corresponding path program 103 times [2021-06-05 05:36:35,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:36:35,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558931719] [2021-06-05 05:36:35,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:36:35,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:36:35,461 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:36:35,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:36:35,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558931719] [2021-06-05 05:36:35,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558931719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:36:35,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676038595] [2021-06-05 05:36:35,461 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 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 05:36:35,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:36:35,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:36:35,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:36:35,673 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:36:35,673 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 31 treesize of output 15 [2021-06-05 05:36:35,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:36:35,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:36:35,680 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 05:36:35,680 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:27 [2021-06-05 05:36:35,883 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:36:35,883 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 29 treesize of output 17 [2021-06-05 05:36:35,884 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:36:35,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:36:35,890 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 05:36:35,890 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:36:36,061 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:36:36,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676038595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:36:36,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:36:36,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 05:36:36,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483983755] [2021-06-05 05:36:36,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:36:36,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:36:36,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:36:36,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1376, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:36:36,062 INFO L87 Difference]: Start difference. First operand 8960 states and 27190 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:36:39,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:36:39,042 INFO L93 Difference]: Finished difference Result 13626 states and 40559 transitions. [2021-06-05 05:36:39,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 05:36:39,042 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:36:39,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:36:39,063 INFO L225 Difference]: With dead ends: 13626 [2021-06-05 05:36:39,063 INFO L226 Difference]: Without dead ends: 13444 [2021-06-05 05:36:39,063 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1518 ImplicationChecksByTransitivity, 2198.4ms TimeCoverageRelationStatistics Valid=506, Invalid=5814, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 05:36:39,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13444 states. [2021-06-05 05:36:39,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13444 to 9008. [2021-06-05 05:36:39,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9008 states, 9007 states have (on average 3.033085378039303) internal successors, (27319), 9007 states have internal predecessors, (27319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:36:39,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9008 states to 9008 states and 27319 transitions. [2021-06-05 05:36:39,211 INFO L78 Accepts]: Start accepts. Automaton has 9008 states and 27319 transitions. Word has length 37 [2021-06-05 05:36:39,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:36:39,211 INFO L482 AbstractCegarLoop]: Abstraction has 9008 states and 27319 transitions. [2021-06-05 05:36:39,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:36:39,211 INFO L276 IsEmpty]: Start isEmpty. Operand 9008 states and 27319 transitions. [2021-06-05 05:36:39,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:36:39,221 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:36:39,221 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:36:39,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:36:39,421 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:36:39,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:36:39,422 INFO L82 PathProgramCache]: Analyzing trace with hash 806188340, now seen corresponding path program 104 times [2021-06-05 05:36:39,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:36:39,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646069354] [2021-06-05 05:36:39,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:36:39,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:36:39,701 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:36:39,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:36:39,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646069354] [2021-06-05 05:36:39,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646069354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:36:39,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792078613] [2021-06-05 05:36:39,701 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 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 05:36:39,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:36:39,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:36:39,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:36:39,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:36:39,907 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:36:39,908 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 25 treesize of output 13 [2021-06-05 05:36:39,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:36:39,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:36:39,914 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 05:36:39,914 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:22 [2021-06-05 05:36:40,117 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:36:40,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 05:36:40,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:36:40,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:36:40,124 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 05:36:40,124 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:36:40,325 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:36:40,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792078613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:36:40,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:36:40,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:36:40,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240864209] [2021-06-05 05:36:40,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:36:40,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:36:40,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:36:40,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:36:40,326 INFO L87 Difference]: Start difference. First operand 9008 states and 27319 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:36:42,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:36:42,659 INFO L93 Difference]: Finished difference Result 10258 states and 30957 transitions. [2021-06-05 05:36:42,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:36:42,659 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:36:42,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:36:42,673 INFO L225 Difference]: With dead ends: 10258 [2021-06-05 05:36:42,673 INFO L226 Difference]: Without dead ends: 10094 [2021-06-05 05:36:42,674 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 1587.6ms TimeCoverageRelationStatistics Valid=221, Invalid=3201, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 05:36:42,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10094 states. [2021-06-05 05:36:42,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10094 to 8984. [2021-06-05 05:36:42,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8984 states, 8983 states have (on average 3.0332850940665703) internal successors, (27248), 8983 states have internal predecessors, (27248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:36:42,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8984 states to 8984 states and 27248 transitions. [2021-06-05 05:36:42,798 INFO L78 Accepts]: Start accepts. Automaton has 8984 states and 27248 transitions. Word has length 37 [2021-06-05 05:36:42,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:36:42,798 INFO L482 AbstractCegarLoop]: Abstraction has 8984 states and 27248 transitions. [2021-06-05 05:36:42,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:36:42,798 INFO L276 IsEmpty]: Start isEmpty. Operand 8984 states and 27248 transitions. [2021-06-05 05:36:42,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:36:42,808 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:36:42,808 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:36:43,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:36:43,008 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:36:43,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:36:43,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1374524816, now seen corresponding path program 105 times [2021-06-05 05:36:43,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:36:43,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925933002] [2021-06-05 05:36:43,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:36:43,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:36:43,291 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:36:43,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:36:43,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925933002] [2021-06-05 05:36:43,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925933002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:36:43,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013223851] [2021-06-05 05:36:43,292 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 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 05:36:43,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:36:43,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:36:43,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:36:43,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:36:43,504 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:36:43,504 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 27 treesize of output 15 [2021-06-05 05:36:43,505 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:36:43,511 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:36:43,511 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 05:36:43,511 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 05:36:43,787 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:36:43,787 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 37 treesize of output 21 [2021-06-05 05:36:43,788 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:36:43,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:36:43,794 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 05:36:43,794 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:25 [2021-06-05 05:36:43,954 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:36:43,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013223851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:36:43,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:36:43,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:36:43,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928024163] [2021-06-05 05:36:43,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:36:43,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:36:43,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:36:43,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1251, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:36:43,955 INFO L87 Difference]: Start difference. First operand 8984 states and 27248 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:36:46,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:36:46,576 INFO L93 Difference]: Finished difference Result 10414 states and 31457 transitions. [2021-06-05 05:36:46,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 05:36:46,577 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:36:46,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:36:46,590 INFO L225 Difference]: With dead ends: 10414 [2021-06-05 05:36:46,591 INFO L226 Difference]: Without dead ends: 10169 [2021-06-05 05:36:46,591 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 1904.7ms TimeCoverageRelationStatistics Valid=256, Invalid=3650, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 05:36:46,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10169 states. [2021-06-05 05:36:46,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10169 to 9004. [2021-06-05 05:36:46,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9004 states, 9003 states have (on average 3.035210485393758) internal successors, (27326), 9003 states have internal predecessors, (27326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:36:46,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9004 states to 9004 states and 27326 transitions. [2021-06-05 05:36:46,713 INFO L78 Accepts]: Start accepts. Automaton has 9004 states and 27326 transitions. Word has length 37 [2021-06-05 05:36:46,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:36:46,713 INFO L482 AbstractCegarLoop]: Abstraction has 9004 states and 27326 transitions. [2021-06-05 05:36:46,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:36:46,713 INFO L276 IsEmpty]: Start isEmpty. Operand 9004 states and 27326 transitions. [2021-06-05 05:36:46,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:36:46,723 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:36:46,723 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:36:46,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2021-06-05 05:36:46,923 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:36:46,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:36:46,923 INFO L82 PathProgramCache]: Analyzing trace with hash -2023109538, now seen corresponding path program 106 times [2021-06-05 05:36:46,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:36:46,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553417921] [2021-06-05 05:36:46,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:36:46,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:36:47,267 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:36:47,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:36:47,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553417921] [2021-06-05 05:36:47,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553417921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:36:47,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601429113] [2021-06-05 05:36:47,267 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 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 05:36:47,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:36:47,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:36:47,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:36:47,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:36:47,471 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:36:47,472 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 25 treesize of output 13 [2021-06-05 05:36:47,472 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:36:47,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:36:47,478 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 05:36:47,478 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:22 [2021-06-05 05:36:47,673 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:36:47,673 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 29 treesize of output 17 [2021-06-05 05:36:47,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:36:47,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:36:47,680 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 05:36:47,680 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:36:47,850 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:36:47,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601429113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:36:47,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:36:47,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 05:36:47,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194321091] [2021-06-05 05:36:47,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:36:47,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:36:47,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:36:47,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1376, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:36:47,852 INFO L87 Difference]: Start difference. First operand 9004 states and 27326 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:36:50,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:36:50,885 INFO L93 Difference]: Finished difference Result 14444 states and 43442 transitions. [2021-06-05 05:36:50,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 05:36:50,885 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:36:50,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:36:50,906 INFO L225 Difference]: With dead ends: 14444 [2021-06-05 05:36:50,906 INFO L226 Difference]: Without dead ends: 14352 [2021-06-05 05:36:50,907 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1521 ImplicationChecksByTransitivity, 2102.4ms TimeCoverageRelationStatistics Valid=516, Invalid=5804, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 05:36:50,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14352 states. [2021-06-05 05:36:51,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14352 to 9126. [2021-06-05 05:36:51,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9126 states, 9125 states have (on average 3.0337534246575344) internal successors, (27683), 9125 states have internal predecessors, (27683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:36:51,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9126 states to 9126 states and 27683 transitions. [2021-06-05 05:36:51,057 INFO L78 Accepts]: Start accepts. Automaton has 9126 states and 27683 transitions. Word has length 37 [2021-06-05 05:36:51,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:36:51,057 INFO L482 AbstractCegarLoop]: Abstraction has 9126 states and 27683 transitions. [2021-06-05 05:36:51,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:36:51,058 INFO L276 IsEmpty]: Start isEmpty. Operand 9126 states and 27683 transitions. [2021-06-05 05:36:51,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:36:51,068 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:36:51,068 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:36:51,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:36:51,269 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:36:51,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:36:51,270 INFO L82 PathProgramCache]: Analyzing trace with hash -326803298, now seen corresponding path program 107 times [2021-06-05 05:36:51,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:36:51,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574402356] [2021-06-05 05:36:51,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:36:51,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:36:51,546 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:36:51,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:36:51,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574402356] [2021-06-05 05:36:51,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574402356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:36:51,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406045877] [2021-06-05 05:36:51,547 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 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 05:36:51,588 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:36:51,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:36:51,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:36:51,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:36:51,760 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:36:51,760 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 36 treesize of output 20 [2021-06-05 05:36:51,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:36:51,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:36:51,767 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 05:36:51,767 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:24 [2021-06-05 05:36:51,887 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:36:51,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 20 [2021-06-05 05:36:51,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:36:51,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:36:51,893 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 05:36:51,893 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:17 [2021-06-05 05:36:52,052 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:36:52,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406045877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:36:52,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:36:52,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-06-05 05:36:52,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096207410] [2021-06-05 05:36:52,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:36:52,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:36:52,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:36:52,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1103, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:36:52,053 INFO L87 Difference]: Start difference. First operand 9126 states and 27683 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 05:36:53,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:36:53,708 INFO L93 Difference]: Finished difference Result 11066 states and 33453 transitions. [2021-06-05 05:36:53,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:36:53,709 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 05:36:53,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:36:53,724 INFO L225 Difference]: With dead ends: 11066 [2021-06-05 05:36:53,724 INFO L226 Difference]: Without dead ends: 11008 [2021-06-05 05:36:53,724 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 1191.1ms TimeCoverageRelationStatistics Valid=211, Invalid=2545, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 05:36:53,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11008 states. [2021-06-05 05:36:53,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11008 to 9139. [2021-06-05 05:36:53,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9139 states, 9138 states have (on average 3.0408185598599258) internal successors, (27787), 9138 states have internal predecessors, (27787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:36:53,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9139 states to 9139 states and 27787 transitions. [2021-06-05 05:36:53,846 INFO L78 Accepts]: Start accepts. Automaton has 9139 states and 27787 transitions. Word has length 37 [2021-06-05 05:36:53,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:36:53,846 INFO L482 AbstractCegarLoop]: Abstraction has 9139 states and 27787 transitions. [2021-06-05 05:36:53,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 05:36:53,846 INFO L276 IsEmpty]: Start isEmpty. Operand 9139 states and 27787 transitions. [2021-06-05 05:36:53,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:36:53,856 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:36:53,856 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:36:54,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,112 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:36:54,057 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:36:54,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:36:54,057 INFO L82 PathProgramCache]: Analyzing trace with hash -2098593696, now seen corresponding path program 108 times [2021-06-05 05:36:54,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:36:54,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206109009] [2021-06-05 05:36:54,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:36:54,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:36:54,384 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:36:54,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:36:54,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206109009] [2021-06-05 05:36:54,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206109009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:36:54,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337583233] [2021-06-05 05:36:54,385 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 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 05:36:54,412 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:36:54,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:36:54,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:36:54,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:36:54,699 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:36:54,700 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 31 treesize of output 19 [2021-06-05 05:36:54,700 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:36:54,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:36:54,707 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 05:36:54,707 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:37 [2021-06-05 05:36:54,777 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:36:54,777 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 43 treesize of output 23 [2021-06-05 05:36:54,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:36:54,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:36:54,783 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 05:36:54,784 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:20 [2021-06-05 05:36:54,937 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:36:54,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337583233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:36:54,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:36:54,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:36:54,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947687426] [2021-06-05 05:36:54,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:36:54,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:36:54,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:36:54,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1219, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:36:54,938 INFO L87 Difference]: Start difference. First operand 9139 states and 27787 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:37:00,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:00,390 INFO L93 Difference]: Finished difference Result 21012 states and 62619 transitions. [2021-06-05 05:37:00,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-06-05 05:37:00,391 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:37:00,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:00,419 INFO L225 Difference]: With dead ends: 21012 [2021-06-05 05:37:00,420 INFO L226 Difference]: Without dead ends: 20662 [2021-06-05 05:37:00,420 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4239 ImplicationChecksByTransitivity, 4188.2ms TimeCoverageRelationStatistics Valid=1388, Invalid=13132, Unknown=0, NotChecked=0, Total=14520 [2021-06-05 05:37:00,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20662 states. [2021-06-05 05:37:00,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20662 to 9536. [2021-06-05 05:37:00,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9536 states, 9535 states have (on average 3.042999475616151) internal successors, (29015), 9535 states have internal predecessors, (29015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:00,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9536 states to 9536 states and 29015 transitions. [2021-06-05 05:37:00,607 INFO L78 Accepts]: Start accepts. Automaton has 9536 states and 29015 transitions. Word has length 37 [2021-06-05 05:37:00,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:00,607 INFO L482 AbstractCegarLoop]: Abstraction has 9536 states and 29015 transitions. [2021-06-05 05:37:00,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:37:00,607 INFO L276 IsEmpty]: Start isEmpty. Operand 9536 states and 29015 transitions. [2021-06-05 05:37:00,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:37:00,617 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:00,618 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:37:00,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:00,818 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:00,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:00,818 INFO L82 PathProgramCache]: Analyzing trace with hash -402287456, now seen corresponding path program 109 times [2021-06-05 05:37:00,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:00,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626333113] [2021-06-05 05:37:00,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:00,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:01,174 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:01,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:01,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626333113] [2021-06-05 05:37:01,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626333113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:01,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143969933] [2021-06-05 05:37:01,174 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 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 05:37:01,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:01,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:37:01,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:01,423 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:37:01,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 05:37:01,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:37:01,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:37:01,430 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 05:37:01,430 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:39 [2021-06-05 05:37:01,487 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:37:01,487 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 29 treesize of output 17 [2021-06-05 05:37:01,488 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:37:01,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:37:01,493 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 05:37:01,493 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:17 [2021-06-05 05:37:01,639 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:01,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143969933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:01,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:01,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 33 [2021-06-05 05:37:01,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986464146] [2021-06-05 05:37:01,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 05:37:01,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:01,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 05:37:01,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1033, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:37:01,640 INFO L87 Difference]: Start difference. First operand 9536 states and 29015 transitions. Second operand has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 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 05:37:05,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:05,583 INFO L93 Difference]: Finished difference Result 14707 states and 44309 transitions. [2021-06-05 05:37:05,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 05:37:05,584 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 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 05:37:05,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:05,605 INFO L225 Difference]: With dead ends: 14707 [2021-06-05 05:37:05,605 INFO L226 Difference]: Without dead ends: 14334 [2021-06-05 05:37:05,605 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2117 ImplicationChecksByTransitivity, 2470.1ms TimeCoverageRelationStatistics Valid=530, Invalid=7480, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 05:37:05,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14334 states. [2021-06-05 05:37:05,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14334 to 9486. [2021-06-05 05:37:05,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9486 states, 9485 states have (on average 3.0481813389562467) internal successors, (28912), 9485 states have internal predecessors, (28912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:05,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9486 states to 9486 states and 28912 transitions. [2021-06-05 05:37:05,761 INFO L78 Accepts]: Start accepts. Automaton has 9486 states and 28912 transitions. Word has length 37 [2021-06-05 05:37:05,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:05,761 INFO L482 AbstractCegarLoop]: Abstraction has 9486 states and 28912 transitions. [2021-06-05 05:37:05,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 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 05:37:05,761 INFO L276 IsEmpty]: Start isEmpty. Operand 9486 states and 28912 transitions. [2021-06-05 05:37:05,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:37:05,772 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:05,772 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:37:05,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:05,973 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:05,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:05,973 INFO L82 PathProgramCache]: Analyzing trace with hash 956108654, now seen corresponding path program 110 times [2021-06-05 05:37:05,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:05,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685632892] [2021-06-05 05:37:05,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:05,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:06,334 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:06,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:06,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685632892] [2021-06-05 05:37:06,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685632892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:06,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636080087] [2021-06-05 05:37:06,334 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 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 05:37:06,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:37:06,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:37:06,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:37:06,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:06,655 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:37:06,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 05:37:06,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:37:06,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:37:06,663 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 05:37:06,663 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 05:37:06,731 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:37:06,731 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 29 treesize of output 17 [2021-06-05 05:37:06,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:37:06,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:37:06,737 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 05:37:06,737 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:37:06,913 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:06,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636080087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:06,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:06,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 37 [2021-06-05 05:37:06,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921485681] [2021-06-05 05:37:06,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:37:06,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:06,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:37:06,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1295, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:37:06,914 INFO L87 Difference]: Start difference. First operand 9486 states and 28912 transitions. Second operand has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 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 05:37:11,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:11,948 INFO L93 Difference]: Finished difference Result 19378 states and 57436 transitions. [2021-06-05 05:37:11,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-06-05 05:37:11,948 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 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 05:37:11,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:11,974 INFO L225 Difference]: With dead ends: 19378 [2021-06-05 05:37:11,974 INFO L226 Difference]: Without dead ends: 19107 [2021-06-05 05:37:11,975 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3967 ImplicationChecksByTransitivity, 4156.7ms TimeCoverageRelationStatistics Valid=1333, Invalid=12947, Unknown=0, NotChecked=0, Total=14280 [2021-06-05 05:37:11,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19107 states. [2021-06-05 05:37:12,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19107 to 9555. [2021-06-05 05:37:12,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9555 states, 9554 states have (on average 3.043541971948922) internal successors, (29078), 9554 states have internal predecessors, (29078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:12,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9555 states to 9555 states and 29078 transitions. [2021-06-05 05:37:12,162 INFO L78 Accepts]: Start accepts. Automaton has 9555 states and 29078 transitions. Word has length 37 [2021-06-05 05:37:12,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:12,162 INFO L482 AbstractCegarLoop]: Abstraction has 9555 states and 29078 transitions. [2021-06-05 05:37:12,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 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 05:37:12,162 INFO L276 IsEmpty]: Start isEmpty. Operand 9555 states and 29078 transitions. [2021-06-05 05:37:12,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:37:12,174 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:12,174 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:37:12,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:12,374 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:12,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:12,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1642552402, now seen corresponding path program 111 times [2021-06-05 05:37:12,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:12,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558302011] [2021-06-05 05:37:12,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:12,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:12,724 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:12,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:12,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558302011] [2021-06-05 05:37:12,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558302011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:12,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110968494] [2021-06-05 05:37:12,725 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 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 05:37:12,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:37:12,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:37:12,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 05:37:12,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:13,045 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:37:13,045 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 31 treesize of output 19 [2021-06-05 05:37:13,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:37:13,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:37:13,053 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 05:37:13,053 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:37 [2021-06-05 05:37:13,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:37:13,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:37:13,137 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 43 treesize of output 23 [2021-06-05 05:37:13,138 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:37:13,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:37:13,147 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 05:37:13,147 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:54, output treesize:20 [2021-06-05 05:37:13,326 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:13,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110968494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:13,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:13,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:37:13,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000610475] [2021-06-05 05:37:13,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:37:13,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:13,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:37:13,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1244, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:37:13,327 INFO L87 Difference]: Start difference. First operand 9555 states and 29078 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:37:18,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:18,333 INFO L93 Difference]: Finished difference Result 14453 states and 43491 transitions. [2021-06-05 05:37:18,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 05:37:18,333 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:37:18,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:18,354 INFO L225 Difference]: With dead ends: 14453 [2021-06-05 05:37:18,354 INFO L226 Difference]: Without dead ends: 14142 [2021-06-05 05:37:18,355 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2195 ImplicationChecksByTransitivity, 3193.2ms TimeCoverageRelationStatistics Valid=606, Invalid=8706, Unknown=0, NotChecked=0, Total=9312 [2021-06-05 05:37:18,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14142 states. [2021-06-05 05:37:18,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14142 to 9678. [2021-06-05 05:37:18,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9678 states, 9677 states have (on average 3.0522889325204092) internal successors, (29537), 9677 states have internal predecessors, (29537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:18,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9678 states to 9678 states and 29537 transitions. [2021-06-05 05:37:18,519 INFO L78 Accepts]: Start accepts. Automaton has 9678 states and 29537 transitions. Word has length 37 [2021-06-05 05:37:18,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:18,519 INFO L482 AbstractCegarLoop]: Abstraction has 9678 states and 29537 transitions. [2021-06-05 05:37:18,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:37:18,519 INFO L276 IsEmpty]: Start isEmpty. Operand 9678 states and 29537 transitions. [2021-06-05 05:37:18,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:37:18,530 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:18,530 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:37:18,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-06-05 05:37:18,731 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:18,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:18,732 INFO L82 PathProgramCache]: Analyzing trace with hash 45112722, now seen corresponding path program 112 times [2021-06-05 05:37:18,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:18,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049303734] [2021-06-05 05:37:18,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:18,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:19,061 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:19,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:19,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049303734] [2021-06-05 05:37:19,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049303734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:19,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927429496] [2021-06-05 05:37:19,062 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 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 05:37:19,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:37:19,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:37:19,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:37:19,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:19,276 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:37:19,276 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 27 treesize of output 15 [2021-06-05 05:37:19,277 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:37:19,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:37:19,284 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 05:37:19,284 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 05:37:19,439 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:37:19,439 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 29 treesize of output 17 [2021-06-05 05:37:19,440 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:37:19,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:37:19,446 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 05:37:19,446 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:37:19,617 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:19,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927429496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:19,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:19,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:37:19,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840178238] [2021-06-05 05:37:19,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:37:19,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:19,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:37:19,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:37:19,619 INFO L87 Difference]: Start difference. First operand 9678 states and 29537 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:37:25,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:25,122 INFO L93 Difference]: Finished difference Result 18391 states and 54943 transitions. [2021-06-05 05:37:25,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-06-05 05:37:25,128 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:37:25,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:25,156 INFO L225 Difference]: With dead ends: 18391 [2021-06-05 05:37:25,156 INFO L226 Difference]: Without dead ends: 18112 [2021-06-05 05:37:25,157 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3736 ImplicationChecksByTransitivity, 4085.3ms TimeCoverageRelationStatistics Valid=1249, Invalid=12091, Unknown=0, NotChecked=0, Total=13340 [2021-06-05 05:37:25,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18112 states. [2021-06-05 05:37:25,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18112 to 9905. [2021-06-05 05:37:25,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9905 states, 9904 states have (on average 3.050787560581583) internal successors, (30215), 9904 states have internal predecessors, (30215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:25,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9905 states to 9905 states and 30215 transitions. [2021-06-05 05:37:25,350 INFO L78 Accepts]: Start accepts. Automaton has 9905 states and 30215 transitions. Word has length 37 [2021-06-05 05:37:25,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:25,350 INFO L482 AbstractCegarLoop]: Abstraction has 9905 states and 30215 transitions. [2021-06-05 05:37:25,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:37:25,350 INFO L276 IsEmpty]: Start isEmpty. Operand 9905 states and 30215 transitions. [2021-06-05 05:37:25,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:37:25,361 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:25,361 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:37:25,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:25,562 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:25,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:25,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1741418962, now seen corresponding path program 113 times [2021-06-05 05:37:25,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:25,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898467854] [2021-06-05 05:37:25,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:25,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:25,892 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:25,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:25,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898467854] [2021-06-05 05:37:25,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898467854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:25,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194299283] [2021-06-05 05:37:25,892 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 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 05:37:25,920 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:37:25,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:37:25,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:37:25,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:26,147 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:37:26,147 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 25 treesize of output 13 [2021-06-05 05:37:26,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:37:26,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:37:26,155 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 05:37:26,155 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 05:37:26,301 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:37:26,302 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 29 treesize of output 17 [2021-06-05 05:37:26,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:37:26,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:37:26,308 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 05:37:26,308 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:37:26,444 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:26,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194299283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:26,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:26,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 35 [2021-06-05 05:37:26,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691984223] [2021-06-05 05:37:26,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:37:26,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:26,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:37:26,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1163, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:37:26,445 INFO L87 Difference]: Start difference. First operand 9905 states and 30215 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 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 05:37:27,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:27,759 INFO L93 Difference]: Finished difference Result 11608 states and 35225 transitions. [2021-06-05 05:37:27,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 05:37:27,759 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 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 05:37:27,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:27,775 INFO L225 Difference]: With dead ends: 11608 [2021-06-05 05:37:27,776 INFO L226 Difference]: Without dead ends: 11412 [2021-06-05 05:37:27,776 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 1369.0ms TimeCoverageRelationStatistics Valid=289, Invalid=3133, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 05:37:27,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11412 states. [2021-06-05 05:37:27,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11412 to 10057. [2021-06-05 05:37:27,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10057 states, 10056 states have (on average 3.057875894988067) internal successors, (30750), 10056 states have internal predecessors, (30750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:27,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10057 states to 10057 states and 30750 transitions. [2021-06-05 05:37:27,915 INFO L78 Accepts]: Start accepts. Automaton has 10057 states and 30750 transitions. Word has length 37 [2021-06-05 05:37:27,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:27,915 INFO L482 AbstractCegarLoop]: Abstraction has 10057 states and 30750 transitions. [2021-06-05 05:37:27,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 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 05:37:27,915 INFO L276 IsEmpty]: Start isEmpty. Operand 10057 states and 30750 transitions. [2021-06-05 05:37:27,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:37:27,926 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:27,926 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:37:28,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:28,127 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:28,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:28,127 INFO L82 PathProgramCache]: Analyzing trace with hash -2018791546, now seen corresponding path program 114 times [2021-06-05 05:37:28,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:28,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236142973] [2021-06-05 05:37:28,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:28,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:28,465 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:28,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:28,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236142973] [2021-06-05 05:37:28,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236142973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:28,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301255472] [2021-06-05 05:37:28,465 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 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 05:37:28,494 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:37:28,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:37:28,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:37:28,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:28,689 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:37:28,689 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 27 treesize of output 15 [2021-06-05 05:37:28,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:37:28,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:37:28,697 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 05:37:28,697 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 05:37:28,910 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:37:28,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 22 [2021-06-05 05:37:28,911 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:37:28,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:37:28,916 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 05:37:28,916 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:20 [2021-06-05 05:37:29,082 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:29,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301255472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:29,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:29,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:37:29,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36609898] [2021-06-05 05:37:29,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:37:29,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:29,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:37:29,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1244, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:37:29,083 INFO L87 Difference]: Start difference. First operand 10057 states and 30750 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:37:33,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:33,076 INFO L93 Difference]: Finished difference Result 15470 states and 46761 transitions. [2021-06-05 05:37:33,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 05:37:33,076 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:37:33,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:33,100 INFO L225 Difference]: With dead ends: 15470 [2021-06-05 05:37:33,101 INFO L226 Difference]: Without dead ends: 15214 [2021-06-05 05:37:33,101 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1905 ImplicationChecksByTransitivity, 2923.7ms TimeCoverageRelationStatistics Valid=523, Invalid=7849, Unknown=0, NotChecked=0, Total=8372 [2021-06-05 05:37:33,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15214 states. [2021-06-05 05:37:33,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15214 to 10066. [2021-06-05 05:37:33,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10066 states, 10065 states have (on average 3.0572280178837556) internal successors, (30771), 10065 states have internal predecessors, (30771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:33,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10066 states to 10066 states and 30771 transitions. [2021-06-05 05:37:33,278 INFO L78 Accepts]: Start accepts. Automaton has 10066 states and 30771 transitions. Word has length 37 [2021-06-05 05:37:33,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:33,278 INFO L482 AbstractCegarLoop]: Abstraction has 10066 states and 30771 transitions. [2021-06-05 05:37:33,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:37:33,278 INFO L276 IsEmpty]: Start isEmpty. Operand 10066 states and 30771 transitions. [2021-06-05 05:37:33,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:37:33,290 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:33,290 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:37:33,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-06-05 05:37:33,490 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:33,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:33,491 INFO L82 PathProgramCache]: Analyzing trace with hash 95462594, now seen corresponding path program 115 times [2021-06-05 05:37:33,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:33,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940005057] [2021-06-05 05:37:33,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:33,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:33,870 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:33,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:33,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940005057] [2021-06-05 05:37:33,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940005057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:33,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346177600] [2021-06-05 05:37:33,870 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 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 05:37:33,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:33,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:37:33,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:34,095 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:37:34,095 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 27 treesize of output 15 [2021-06-05 05:37:34,096 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:37:34,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:37:34,103 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 05:37:34,103 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 05:37:34,321 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:37:34,321 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 30 treesize of output 18 [2021-06-05 05:37:34,322 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:37:34,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:37:34,328 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 05:37:34,328 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 05:37:34,478 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:34,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346177600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:34,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:34,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:37:34,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982948071] [2021-06-05 05:37:34,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:37:34,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:34,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:37:34,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1245, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:37:34,479 INFO L87 Difference]: Start difference. First operand 10066 states and 30771 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:37:38,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:38,263 INFO L93 Difference]: Finished difference Result 15547 states and 47074 transitions. [2021-06-05 05:37:38,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 05:37:38,263 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:37:38,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:38,287 INFO L225 Difference]: With dead ends: 15547 [2021-06-05 05:37:38,287 INFO L226 Difference]: Without dead ends: 15268 [2021-06-05 05:37:38,288 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1581 ImplicationChecksByTransitivity, 2780.5ms TimeCoverageRelationStatistics Valid=442, Invalid=6868, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 05:37:38,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15268 states. [2021-06-05 05:37:38,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15268 to 10253. [2021-06-05 05:37:38,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10253 states, 10252 states have (on average 3.0635973468591495) internal successors, (31408), 10252 states have internal predecessors, (31408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:38,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10253 states to 10253 states and 31408 transitions. [2021-06-05 05:37:38,453 INFO L78 Accepts]: Start accepts. Automaton has 10253 states and 31408 transitions. Word has length 37 [2021-06-05 05:37:38,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:38,453 INFO L482 AbstractCegarLoop]: Abstraction has 10253 states and 31408 transitions. [2021-06-05 05:37:38,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:37:38,453 INFO L276 IsEmpty]: Start isEmpty. Operand 10253 states and 31408 transitions. [2021-06-05 05:37:38,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:37:38,465 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:38,465 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:37:38,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:38,665 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:38,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:38,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1240994454, now seen corresponding path program 116 times [2021-06-05 05:37:38,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:38,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220127536] [2021-06-05 05:37:38,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:38,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:39,009 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:39,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:39,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220127536] [2021-06-05 05:37:39,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220127536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:39,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110843123] [2021-06-05 05:37:39,010 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:39,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:37:39,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:37:39,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:37:39,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:39,279 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:37:39,280 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 27 treesize of output 15 [2021-06-05 05:37:39,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:37:39,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:37:39,288 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 05:37:39,289 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 05:37:39,482 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:37:39,483 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 29 treesize of output 17 [2021-06-05 05:37:39,483 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:37:39,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:37:39,489 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 05:37:39,489 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:37:39,671 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:39,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110843123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:39,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:39,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:37:39,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679050966] [2021-06-05 05:37:39,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:37:39,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:39,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:37:39,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1245, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:37:39,672 INFO L87 Difference]: Start difference. First operand 10253 states and 31408 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:37:43,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:43,568 INFO L93 Difference]: Finished difference Result 15818 states and 47909 transitions. [2021-06-05 05:37:43,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 05:37:43,568 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:37:43,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:43,592 INFO L225 Difference]: With dead ends: 15818 [2021-06-05 05:37:43,593 INFO L226 Difference]: Without dead ends: 15562 [2021-06-05 05:37:43,593 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1600 ImplicationChecksByTransitivity, 2803.4ms TimeCoverageRelationStatistics Valid=472, Invalid=7010, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 05:37:43,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15562 states. [2021-06-05 05:37:43,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15562 to 10253. [2021-06-05 05:37:43,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10253 states, 10252 states have (on average 3.063304721030043) internal successors, (31405), 10252 states have internal predecessors, (31405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:43,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10253 states to 10253 states and 31405 transitions. [2021-06-05 05:37:43,804 INFO L78 Accepts]: Start accepts. Automaton has 10253 states and 31405 transitions. Word has length 37 [2021-06-05 05:37:43,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:43,804 INFO L482 AbstractCegarLoop]: Abstraction has 10253 states and 31405 transitions. [2021-06-05 05:37:43,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:37:43,804 INFO L276 IsEmpty]: Start isEmpty. Operand 10253 states and 31405 transitions. [2021-06-05 05:37:43,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:37:43,815 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:43,815 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:37:44,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:44,015 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:44,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:44,016 INFO L82 PathProgramCache]: Analyzing trace with hash -939718702, now seen corresponding path program 117 times [2021-06-05 05:37:44,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:44,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260427968] [2021-06-05 05:37:44,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:44,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:44,367 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:44,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:44,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260427968] [2021-06-05 05:37:44,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260427968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:44,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461118703] [2021-06-05 05:37:44,367 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:44,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:37:44,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:37:44,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:37:44,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:44,588 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:37:44,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 05:37:44,589 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:37:44,595 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:37:44,596 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 05:37:44,596 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:33 [2021-06-05 05:37:44,810 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:37:44,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 24 [2021-06-05 05:37:44,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:37:44,816 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:37:44,817 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 05:37:44,817 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:25 [2021-06-05 05:37:44,957 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:44,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461118703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:44,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:44,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:37:44,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435899818] [2021-06-05 05:37:44,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:37:44,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:44,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:37:44,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1246, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:37:44,958 INFO L87 Difference]: Start difference. First operand 10253 states and 31405 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:37:48,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:48,841 INFO L93 Difference]: Finished difference Result 16186 states and 49037 transitions. [2021-06-05 05:37:48,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 05:37:48,841 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:37:48,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:48,865 INFO L225 Difference]: With dead ends: 16186 [2021-06-05 05:37:48,866 INFO L226 Difference]: Without dead ends: 15910 [2021-06-05 05:37:48,866 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1559 ImplicationChecksByTransitivity, 2702.2ms TimeCoverageRelationStatistics Valid=448, Invalid=6862, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 05:37:48,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15910 states. [2021-06-05 05:37:48,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15910 to 10271. [2021-06-05 05:37:49,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10271 states, 10270 states have (on average 3.0632911392405062) internal successors, (31460), 10270 states have internal predecessors, (31460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:49,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10271 states to 10271 states and 31460 transitions. [2021-06-05 05:37:49,021 INFO L78 Accepts]: Start accepts. Automaton has 10271 states and 31460 transitions. Word has length 37 [2021-06-05 05:37:49,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:49,021 INFO L482 AbstractCegarLoop]: Abstraction has 10271 states and 31460 transitions. [2021-06-05 05:37:49,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:37:49,021 INFO L276 IsEmpty]: Start isEmpty. Operand 10271 states and 31460 transitions. [2021-06-05 05:37:49,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:37:49,031 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:49,032 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:37:49,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-06-05 05:37:49,232 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:49,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:49,232 INFO L82 PathProgramCache]: Analyzing trace with hash -2146589852, now seen corresponding path program 118 times [2021-06-05 05:37:49,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:49,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399619991] [2021-06-05 05:37:49,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:49,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:49,566 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:49,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:49,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399619991] [2021-06-05 05:37:49,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399619991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:49,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51338376] [2021-06-05 05:37:49,566 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:49,593 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:37:49,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:37:49,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:37:49,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:49,841 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:37:49,841 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 27 treesize of output 15 [2021-06-05 05:37:49,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:37:49,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:37:49,849 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 05:37:49,849 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 05:37:50,068 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:37:50,068 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 30 treesize of output 18 [2021-06-05 05:37:50,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:37:50,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:37:50,075 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 05:37:50,075 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 05:37:50,231 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:50,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51338376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:50,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:50,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:37:50,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007274596] [2021-06-05 05:37:50,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:37:50,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:50,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:37:50,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1248, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:37:50,232 INFO L87 Difference]: Start difference. First operand 10271 states and 31460 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:37:53,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:53,918 INFO L93 Difference]: Finished difference Result 15619 states and 47242 transitions. [2021-06-05 05:37:53,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 05:37:53,919 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:37:53,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:53,942 INFO L225 Difference]: With dead ends: 15619 [2021-06-05 05:37:53,942 INFO L226 Difference]: Without dead ends: 15327 [2021-06-05 05:37:53,942 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1300 ImplicationChecksByTransitivity, 2668.8ms TimeCoverageRelationStatistics Valid=409, Invalid=6233, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 05:37:53,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15327 states. [2021-06-05 05:37:54,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15327 to 10241. [2021-06-05 05:37:54,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10241 states, 10240 states have (on average 3.0640625) internal successors, (31376), 10240 states have internal predecessors, (31376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:54,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10241 states to 10241 states and 31376 transitions. [2021-06-05 05:37:54,099 INFO L78 Accepts]: Start accepts. Automaton has 10241 states and 31376 transitions. Word has length 37 [2021-06-05 05:37:54,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:54,099 INFO L482 AbstractCegarLoop]: Abstraction has 10241 states and 31376 transitions. [2021-06-05 05:37:54,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:37:54,099 INFO L276 IsEmpty]: Start isEmpty. Operand 10241 states and 31376 transitions. [2021-06-05 05:37:54,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:37:54,110 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:54,110 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:37:54,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:54,311 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:54,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:54,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1398529486, now seen corresponding path program 119 times [2021-06-05 05:37:54,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:54,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783666060] [2021-06-05 05:37:54,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:54,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:54,625 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:54,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:54,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783666060] [2021-06-05 05:37:54,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783666060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:54,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849619378] [2021-06-05 05:37:54,626 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:54,653 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:37:54,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:37:54,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:37:54,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:54,837 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:37:54,837 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 27 treesize of output 15 [2021-06-05 05:37:54,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:37:54,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:37:54,845 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 05:37:54,845 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 05:37:54,931 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:37:54,931 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 31 treesize of output 19 [2021-06-05 05:37:54,932 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:37:54,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:37:54,937 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 05:37:54,937 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:17 [2021-06-05 05:37:55,064 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:55,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849619378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:55,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:55,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-06-05 05:37:55,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769709714] [2021-06-05 05:37:55,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:37:55,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:55,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:37:55,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1061, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:37:55,065 INFO L87 Difference]: Start difference. First operand 10241 states and 31376 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 05:37:57,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:37:57,693 INFO L93 Difference]: Finished difference Result 19517 states and 58523 transitions. [2021-06-05 05:37:57,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 05:37:57,694 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 05:37:57,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:37:57,722 INFO L225 Difference]: With dead ends: 19517 [2021-06-05 05:37:57,722 INFO L226 Difference]: Without dead ends: 19238 [2021-06-05 05:37:57,723 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2363 ImplicationChecksByTransitivity, 2300.4ms TimeCoverageRelationStatistics Valid=812, Invalid=7378, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 05:37:57,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19238 states. [2021-06-05 05:37:57,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19238 to 10138. [2021-06-05 05:37:57,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10138 states, 10137 states have (on average 3.059583703265266) internal successors, (31015), 10137 states have internal predecessors, (31015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:37:57,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10138 states to 10138 states and 31015 transitions. [2021-06-05 05:37:57,907 INFO L78 Accepts]: Start accepts. Automaton has 10138 states and 31015 transitions. Word has length 37 [2021-06-05 05:37:57,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:37:57,907 INFO L482 AbstractCegarLoop]: Abstraction has 10138 states and 31015 transitions. [2021-06-05 05:37:57,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 05:37:57,907 INFO L276 IsEmpty]: Start isEmpty. Operand 10138 states and 31015 transitions. [2021-06-05 05:37:57,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:37:57,918 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:37:57,918 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:37:58,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-06-05 05:37:58,119 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:37:58,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:37:58,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1200131570, now seen corresponding path program 120 times [2021-06-05 05:37:58,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:37:58,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806207940] [2021-06-05 05:37:58,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:37:58,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:37:58,474 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:58,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:37:58,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806207940] [2021-06-05 05:37:58,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806207940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:58,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641119559] [2021-06-05 05:37:58,475 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:37:58,502 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:37:58,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:37:58,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 05:37:58,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:37:58,690 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:37:58,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 05:37:58,691 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:37:58,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:37:58,697 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 05:37:58,698 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 05:37:58,843 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:37:58,843 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 29 treesize of output 17 [2021-06-05 05:37:58,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:37:58,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:37:58,850 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 05:37:58,850 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:17 [2021-06-05 05:37:59,002 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:37:59,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641119559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:37:59,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:37:59,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:37:59,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705227125] [2021-06-05 05:37:59,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:37:59,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:37:59,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:37:59,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1232, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:37:59,003 INFO L87 Difference]: Start difference. First operand 10138 states and 31015 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:38:00,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:00,950 INFO L93 Difference]: Finished difference Result 12990 states and 39338 transitions. [2021-06-05 05:38:00,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 05:38:00,951 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:38:00,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:00,970 INFO L225 Difference]: With dead ends: 12990 [2021-06-05 05:38:00,970 INFO L226 Difference]: Without dead ends: 12694 [2021-06-05 05:38:00,971 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 789 ImplicationChecksByTransitivity, 1508.8ms TimeCoverageRelationStatistics Valid=282, Invalid=3624, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 05:38:00,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12694 states. [2021-06-05 05:38:01,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12694 to 10072. [2021-06-05 05:38:01,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10072 states, 10071 states have (on average 3.0629530334624167) internal successors, (30847), 10071 states have internal predecessors, (30847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:01,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10072 states to 10072 states and 30847 transitions. [2021-06-05 05:38:01,136 INFO L78 Accepts]: Start accepts. Automaton has 10072 states and 30847 transitions. Word has length 37 [2021-06-05 05:38:01,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:01,136 INFO L482 AbstractCegarLoop]: Abstraction has 10072 states and 30847 transitions. [2021-06-05 05:38:01,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:38:01,136 INFO L276 IsEmpty]: Start isEmpty. Operand 10072 states and 30847 transitions. [2021-06-05 05:38:01,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:38:01,147 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:01,147 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:01,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-06-05 05:38:01,361 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:01,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:01,361 INFO L82 PathProgramCache]: Analyzing trace with hash -482505722, now seen corresponding path program 121 times [2021-06-05 05:38:01,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:01,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261728013] [2021-06-05 05:38:01,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:01,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:01,695 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:01,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:01,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261728013] [2021-06-05 05:38:01,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261728013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:01,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140915965] [2021-06-05 05:38:01,696 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:01,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:01,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:38:01,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:02,021 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:38:02,021 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 25 treesize of output 13 [2021-06-05 05:38:02,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:38:02,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:38:02,029 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 05:38:02,029 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 05:38:02,095 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:38:02,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 05:38:02,097 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:38:02,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:38:02,102 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 05:38:02,102 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:38:02,276 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:02,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140915965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:02,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:02,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 37 [2021-06-05 05:38:02,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938947425] [2021-06-05 05:38:02,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:38:02,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:02,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:38:02,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1300, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:38:02,277 INFO L87 Difference]: Start difference. First operand 10072 states and 30847 transitions. Second operand has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 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 05:38:05,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:05,452 INFO L93 Difference]: Finished difference Result 15078 states and 45035 transitions. [2021-06-05 05:38:05,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 05:38:05,452 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 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 05:38:05,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:05,474 INFO L225 Difference]: With dead ends: 15078 [2021-06-05 05:38:05,474 INFO L226 Difference]: Without dead ends: 14872 [2021-06-05 05:38:05,474 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1461 ImplicationChecksByTransitivity, 2525.6ms TimeCoverageRelationStatistics Valid=638, Invalid=6168, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 05:38:05,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14872 states. [2021-06-05 05:38:05,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14872 to 10048. [2021-06-05 05:38:05,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10048 states, 10047 states have (on average 3.059321190405096) internal successors, (30737), 10047 states have internal predecessors, (30737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:05,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10048 states to 10048 states and 30737 transitions. [2021-06-05 05:38:05,641 INFO L78 Accepts]: Start accepts. Automaton has 10048 states and 30737 transitions. Word has length 37 [2021-06-05 05:38:05,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:05,641 INFO L482 AbstractCegarLoop]: Abstraction has 10048 states and 30737 transitions. [2021-06-05 05:38:05,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 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 05:38:05,641 INFO L276 IsEmpty]: Start isEmpty. Operand 10048 states and 30737 transitions. [2021-06-05 05:38:05,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:38:05,652 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:05,652 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:05,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable218 [2021-06-05 05:38:05,853 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:05,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:05,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1213800518, now seen corresponding path program 122 times [2021-06-05 05:38:05,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:05,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729945022] [2021-06-05 05:38:05,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:05,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:06,176 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:06,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:06,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729945022] [2021-06-05 05:38:06,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729945022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:06,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43595440] [2021-06-05 05:38:06,177 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:06,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:38:06,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:06,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:38:06,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:06,416 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:38:06,416 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 38 treesize of output 22 [2021-06-05 05:38:06,417 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:38:06,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:38:06,422 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 05:38:06,422 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:24 [2021-06-05 05:38:06,478 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:38:06,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 05:38:06,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:38:06,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:38:06,483 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 05:38:06,483 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:15 [2021-06-05 05:38:06,633 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:06,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43595440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:06,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:06,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-06-05 05:38:06,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9576622] [2021-06-05 05:38:06,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:38:06,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:06,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:38:06,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1100, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:38:06,634 INFO L87 Difference]: Start difference. First operand 10048 states and 30737 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 05:38:08,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:08,113 INFO L93 Difference]: Finished difference Result 11444 states and 34793 transitions. [2021-06-05 05:38:08,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:38:08,113 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 05:38:08,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:08,130 INFO L225 Difference]: With dead ends: 11444 [2021-06-05 05:38:08,130 INFO L226 Difference]: Without dead ends: 11212 [2021-06-05 05:38:08,130 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1135.9ms TimeCoverageRelationStatistics Valid=199, Invalid=2351, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 05:38:08,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11212 states. [2021-06-05 05:38:08,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11212 to 9988. [2021-06-05 05:38:08,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9988 states, 9987 states have (on average 3.0625813557624912) internal successors, (30586), 9987 states have internal predecessors, (30586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:08,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9988 states to 9988 states and 30586 transitions. [2021-06-05 05:38:08,265 INFO L78 Accepts]: Start accepts. Automaton has 9988 states and 30586 transitions. Word has length 37 [2021-06-05 05:38:08,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:08,265 INFO L482 AbstractCegarLoop]: Abstraction has 9988 states and 30586 transitions. [2021-06-05 05:38:08,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 05:38:08,265 INFO L276 IsEmpty]: Start isEmpty. Operand 9988 states and 30586 transitions. [2021-06-05 05:38:08,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:38:08,276 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:08,276 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:08,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:08,477 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:08,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:08,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1393501654, now seen corresponding path program 123 times [2021-06-05 05:38:08,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:08,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81747823] [2021-06-05 05:38:08,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:08,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:08,777 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:08,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:08,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81747823] [2021-06-05 05:38:08,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81747823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:08,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213016593] [2021-06-05 05:38:08,777 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:08,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:38:08,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:08,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:38:08,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:09,000 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:38:09,000 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 27 treesize of output 15 [2021-06-05 05:38:09,001 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:38:09,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:38:09,008 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 05:38:09,008 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 05:38:09,165 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:38:09,166 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 29 treesize of output 17 [2021-06-05 05:38:09,166 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:38:09,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:38:09,172 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 05:38:09,172 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:38:09,341 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:09,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213016593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:09,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:09,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:38:09,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675139290] [2021-06-05 05:38:09,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:38:09,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:09,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:38:09,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1233, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:38:09,342 INFO L87 Difference]: Start difference. First operand 9988 states and 30586 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:38:12,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:12,272 INFO L93 Difference]: Finished difference Result 14398 states and 43235 transitions. [2021-06-05 05:38:12,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 05:38:12,272 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:38:12,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:12,293 INFO L225 Difference]: With dead ends: 14398 [2021-06-05 05:38:12,293 INFO L226 Difference]: Without dead ends: 14119 [2021-06-05 05:38:12,293 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1108 ImplicationChecksByTransitivity, 2192.8ms TimeCoverageRelationStatistics Valid=512, Invalid=5038, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 05:38:12,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14119 states. [2021-06-05 05:38:12,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14119 to 10072. [2021-06-05 05:38:12,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10072 states, 10071 states have (on average 3.0604706583258863) internal successors, (30822), 10071 states have internal predecessors, (30822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:12,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10072 states to 10072 states and 30822 transitions. [2021-06-05 05:38:12,496 INFO L78 Accepts]: Start accepts. Automaton has 10072 states and 30822 transitions. Word has length 37 [2021-06-05 05:38:12,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:12,496 INFO L482 AbstractCegarLoop]: Abstraction has 10072 states and 30822 transitions. [2021-06-05 05:38:12,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:38:12,496 INFO L276 IsEmpty]: Start isEmpty. Operand 10072 states and 30822 transitions. [2021-06-05 05:38:12,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:38:12,508 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:12,508 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:12,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-06-05 05:38:12,708 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:12,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:12,708 INFO L82 PathProgramCache]: Analyzing trace with hash 302804586, now seen corresponding path program 124 times [2021-06-05 05:38:12,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:12,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478872711] [2021-06-05 05:38:12,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:12,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:13,042 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:13,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:13,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478872711] [2021-06-05 05:38:13,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478872711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:13,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585422064] [2021-06-05 05:38:13,043 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:13,071 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:38:13,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:13,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:38:13,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:13,273 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:38:13,273 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 27 treesize of output 15 [2021-06-05 05:38:13,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:38:13,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:38:13,281 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 05:38:13,281 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 05:38:13,449 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:38:13,450 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 29 treesize of output 17 [2021-06-05 05:38:13,450 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:38:13,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:38:13,456 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 05:38:13,456 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:38:13,650 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:13,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585422064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:13,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:13,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:38:13,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478839082] [2021-06-05 05:38:13,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:38:13,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:13,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:38:13,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1250, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:38:13,651 INFO L87 Difference]: Start difference. First operand 10072 states and 30822 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:38:16,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:16,039 INFO L93 Difference]: Finished difference Result 11139 states and 33907 transitions. [2021-06-05 05:38:16,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:38:16,040 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:38:16,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:16,054 INFO L225 Difference]: With dead ends: 11139 [2021-06-05 05:38:16,054 INFO L226 Difference]: Without dead ends: 10972 [2021-06-05 05:38:16,055 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 1812.3ms TimeCoverageRelationStatistics Valid=261, Invalid=3521, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 05:38:16,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10972 states. [2021-06-05 05:38:16,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10972 to 10021. [2021-06-05 05:38:16,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10021 states, 10020 states have (on average 3.061676646706587) internal successors, (30678), 10020 states have internal predecessors, (30678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:16,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10021 states to 10021 states and 30678 transitions. [2021-06-05 05:38:16,177 INFO L78 Accepts]: Start accepts. Automaton has 10021 states and 30678 transitions. Word has length 37 [2021-06-05 05:38:16,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:16,177 INFO L482 AbstractCegarLoop]: Abstraction has 10021 states and 30678 transitions. [2021-06-05 05:38:16,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:38:16,177 INFO L276 IsEmpty]: Start isEmpty. Operand 10021 states and 30678 transitions. [2021-06-05 05:38:16,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:38:16,187 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:16,187 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:16,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-06-05 05:38:16,388 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:16,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:16,388 INFO L82 PathProgramCache]: Analyzing trace with hash 837561374, now seen corresponding path program 125 times [2021-06-05 05:38:16,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:16,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013389843] [2021-06-05 05:38:16,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:16,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:16,716 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:16,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:16,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013389843] [2021-06-05 05:38:16,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013389843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:16,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711648142] [2021-06-05 05:38:16,716 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:16,743 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:38:16,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:16,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 05:38:16,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:16,947 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:38:16,947 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 27 treesize of output 15 [2021-06-05 05:38:16,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:38:16,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:38:16,955 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 05:38:16,955 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 05:38:17,141 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:38:17,141 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 29 treesize of output 17 [2021-06-05 05:38:17,142 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:38:17,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:38:17,166 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 05:38:17,166 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:38:17,360 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:17,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711648142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:17,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:17,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:38:17,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277843776] [2021-06-05 05:38:17,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:38:17,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:17,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:38:17,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1249, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:38:17,361 INFO L87 Difference]: Start difference. First operand 10021 states and 30678 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:38:19,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:19,721 INFO L93 Difference]: Finished difference Result 11714 states and 35534 transitions. [2021-06-05 05:38:19,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 05:38:19,721 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:38:19,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:19,736 INFO L225 Difference]: With dead ends: 11714 [2021-06-05 05:38:19,736 INFO L226 Difference]: Without dead ends: 11527 [2021-06-05 05:38:19,736 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 1904.3ms TimeCoverageRelationStatistics Valid=271, Invalid=3761, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 05:38:19,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11527 states. [2021-06-05 05:38:19,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11527 to 10053. [2021-06-05 05:38:19,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10053 states, 10052 states have (on average 3.0612813370473537) internal successors, (30772), 10052 states have internal predecessors, (30772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:19,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10053 states to 10053 states and 30772 transitions. [2021-06-05 05:38:19,867 INFO L78 Accepts]: Start accepts. Automaton has 10053 states and 30772 transitions. Word has length 37 [2021-06-05 05:38:19,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:19,867 INFO L482 AbstractCegarLoop]: Abstraction has 10053 states and 30772 transitions. [2021-06-05 05:38:19,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:38:19,867 INFO L276 IsEmpty]: Start isEmpty. Operand 10053 states and 30772 transitions. [2021-06-05 05:38:19,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:38:19,878 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:19,878 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:20,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-06-05 05:38:20,079 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:20,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:20,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1343151782, now seen corresponding path program 126 times [2021-06-05 05:38:20,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:20,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245988978] [2021-06-05 05:38:20,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:20,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:20,415 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:20,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:20,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245988978] [2021-06-05 05:38:20,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245988978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:20,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434030695] [2021-06-05 05:38:20,416 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:20,443 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:38:20,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:20,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:38:20,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:20,653 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:38:20,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 05:38:20,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:38:20,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:38:20,664 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 05:38:20,664 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 05:38:20,899 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:38:20,899 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 44 treesize of output 24 [2021-06-05 05:38:20,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:38:20,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:38:20,906 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 05:38:20,906 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:25 [2021-06-05 05:38:21,050 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:21,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434030695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:21,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:21,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:38:21,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537106316] [2021-06-05 05:38:21,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:38:21,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:21,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:38:21,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1249, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:38:21,051 INFO L87 Difference]: Start difference. First operand 10053 states and 30772 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:38:23,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:23,534 INFO L93 Difference]: Finished difference Result 11647 states and 35316 transitions. [2021-06-05 05:38:23,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:38:23,534 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:38:23,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:23,549 INFO L225 Difference]: With dead ends: 11647 [2021-06-05 05:38:23,550 INFO L226 Difference]: Without dead ends: 11447 [2021-06-05 05:38:23,550 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 1860.9ms TimeCoverageRelationStatistics Valid=262, Invalid=3644, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 05:38:23,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11447 states. [2021-06-05 05:38:23,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11447 to 10036. [2021-06-05 05:38:23,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10036 states, 10035 states have (on average 3.0617837568510216) internal successors, (30725), 10035 states have internal predecessors, (30725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:23,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10036 states to 10036 states and 30725 transitions. [2021-06-05 05:38:23,686 INFO L78 Accepts]: Start accepts. Automaton has 10036 states and 30725 transitions. Word has length 37 [2021-06-05 05:38:23,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:23,686 INFO L482 AbstractCegarLoop]: Abstraction has 10036 states and 30725 transitions. [2021-06-05 05:38:23,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:38:23,686 INFO L276 IsEmpty]: Start isEmpty. Operand 10036 states and 30725 transitions. [2021-06-05 05:38:23,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:38:23,697 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:23,697 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:23,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:23,898 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:23,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:23,898 INFO L82 PathProgramCache]: Analyzing trace with hash -197619922, now seen corresponding path program 127 times [2021-06-05 05:38:23,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:23,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989152910] [2021-06-05 05:38:23,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:23,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:24,258 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:24,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:24,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989152910] [2021-06-05 05:38:24,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989152910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:24,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336929045] [2021-06-05 05:38:24,259 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:24,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:24,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:38:24,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:24,489 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:38:24,489 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 25 treesize of output 13 [2021-06-05 05:38:24,490 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:38:24,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:38:24,497 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 05:38:24,497 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 05:38:24,667 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:38:24,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 05:38:24,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:38:24,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:38:24,673 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 05:38:24,673 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:38:24,862 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:24,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336929045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:24,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:24,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:38:24,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589659093] [2021-06-05 05:38:24,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:38:24,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:24,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:38:24,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1249, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:38:24,863 INFO L87 Difference]: Start difference. First operand 10036 states and 30725 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:38:27,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:27,221 INFO L93 Difference]: Finished difference Result 11924 states and 36186 transitions. [2021-06-05 05:38:27,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:38:27,221 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:38:27,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:27,237 INFO L225 Difference]: With dead ends: 11924 [2021-06-05 05:38:27,237 INFO L226 Difference]: Without dead ends: 11737 [2021-06-05 05:38:27,237 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 1852.1ms TimeCoverageRelationStatistics Valid=272, Invalid=3760, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 05:38:27,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11737 states. [2021-06-05 05:38:27,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11737 to 10036. [2021-06-05 05:38:27,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10036 states, 10035 states have (on average 3.061484803188839) internal successors, (30722), 10035 states have internal predecessors, (30722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:27,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10036 states to 10036 states and 30722 transitions. [2021-06-05 05:38:27,380 INFO L78 Accepts]: Start accepts. Automaton has 10036 states and 30722 transitions. Word has length 37 [2021-06-05 05:38:27,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:27,380 INFO L482 AbstractCegarLoop]: Abstraction has 10036 states and 30722 transitions. [2021-06-05 05:38:27,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:38:27,380 INFO L276 IsEmpty]: Start isEmpty. Operand 10036 states and 30722 transitions. [2021-06-05 05:38:27,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:38:27,392 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:27,392 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:27,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:27,593 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:27,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:27,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1916634218, now seen corresponding path program 128 times [2021-06-05 05:38:27,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:27,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99358691] [2021-06-05 05:38:27,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:27,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:27,916 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:27,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:27,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99358691] [2021-06-05 05:38:27,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99358691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:27,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313643825] [2021-06-05 05:38:27,917 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:27,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:38:27,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:27,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:38:27,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:28,141 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:38:28,141 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 27 treesize of output 15 [2021-06-05 05:38:28,142 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:38:28,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:38:28,149 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 05:38:28,149 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 05:38:28,266 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:38:28,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 05:38:28,267 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:38:28,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:38:28,272 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 05:38:28,272 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:38:28,394 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:28,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313643825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:28,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:28,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-06-05 05:38:28,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601454303] [2021-06-05 05:38:28,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:38:28,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:28,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:38:28,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1101, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:38:28,395 INFO L87 Difference]: Start difference. First operand 10036 states and 30722 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 05:38:29,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:29,763 INFO L93 Difference]: Finished difference Result 11857 states and 35960 transitions. [2021-06-05 05:38:29,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:38:29,763 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 05:38:29,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:29,779 INFO L225 Difference]: With dead ends: 11857 [2021-06-05 05:38:29,779 INFO L226 Difference]: Without dead ends: 11641 [2021-06-05 05:38:29,779 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1175.1ms TimeCoverageRelationStatistics Valid=203, Invalid=2347, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 05:38:29,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11641 states. [2021-06-05 05:38:29,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11641 to 10009. [2021-06-05 05:38:29,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10009 states, 10008 states have (on average 3.062150279776179) internal successors, (30646), 10008 states have internal predecessors, (30646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:29,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10009 states to 10009 states and 30646 transitions. [2021-06-05 05:38:29,941 INFO L78 Accepts]: Start accepts. Automaton has 10009 states and 30646 transitions. Word has length 37 [2021-06-05 05:38:29,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:29,941 INFO L482 AbstractCegarLoop]: Abstraction has 10009 states and 30646 transitions. [2021-06-05 05:38:29,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 05:38:29,941 INFO L276 IsEmpty]: Start isEmpty. Operand 10009 states and 30646 transitions. [2021-06-05 05:38:29,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:38:29,952 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:29,952 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:30,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable231 [2021-06-05 05:38:30,152 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:30,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:30,153 INFO L82 PathProgramCache]: Analyzing trace with hash -40084890, now seen corresponding path program 129 times [2021-06-05 05:38:30,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:30,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728537472] [2021-06-05 05:38:30,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:30,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:30,456 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:30,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:30,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728537472] [2021-06-05 05:38:30,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728537472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:30,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25249105] [2021-06-05 05:38:30,456 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:30,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:38:30,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:30,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:38:30,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:30,676 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:38:30,677 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 25 treesize of output 13 [2021-06-05 05:38:30,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:38:30,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:38:30,684 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 05:38:30,684 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 05:38:30,854 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:38:30,854 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 29 treesize of output 17 [2021-06-05 05:38:30,855 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:38:30,860 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:38:30,860 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 05:38:30,860 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:38:31,037 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:31,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25249105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:31,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:31,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:38:31,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405391728] [2021-06-05 05:38:31,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:38:31,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:31,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:38:31,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1235, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:38:31,038 INFO L87 Difference]: Start difference. First operand 10009 states and 30646 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:38:33,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:33,613 INFO L93 Difference]: Finished difference Result 13826 states and 41577 transitions. [2021-06-05 05:38:33,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 05:38:33,614 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:38:33,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:33,636 INFO L225 Difference]: With dead ends: 13826 [2021-06-05 05:38:33,636 INFO L226 Difference]: Without dead ends: 13644 [2021-06-05 05:38:33,637 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 2051.6ms TimeCoverageRelationStatistics Valid=433, Invalid=4679, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 05:38:33,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13644 states. [2021-06-05 05:38:33,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13644 to 10084. [2021-06-05 05:38:33,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10084 states, 10083 states have (on average 3.0606962213626896) internal successors, (30861), 10083 states have internal predecessors, (30861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:33,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10084 states to 10084 states and 30861 transitions. [2021-06-05 05:38:33,809 INFO L78 Accepts]: Start accepts. Automaton has 10084 states and 30861 transitions. Word has length 37 [2021-06-05 05:38:33,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:33,809 INFO L482 AbstractCegarLoop]: Abstraction has 10084 states and 30861 transitions. [2021-06-05 05:38:33,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:38:33,809 INFO L276 IsEmpty]: Start isEmpty. Operand 10084 states and 30861 transitions. [2021-06-05 05:38:33,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:38:33,820 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:33,820 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:34,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2021-06-05 05:38:34,020 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:34,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:34,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1656221350, now seen corresponding path program 130 times [2021-06-05 05:38:34,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:34,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989585161] [2021-06-05 05:38:34,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:34,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:34,320 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:34,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:34,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989585161] [2021-06-05 05:38:34,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989585161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:34,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884668442] [2021-06-05 05:38:34,321 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:34,345 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:38:34,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:34,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:38:34,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:34,547 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:38:34,547 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 27 treesize of output 15 [2021-06-05 05:38:34,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:38:34,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:38:34,555 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 05:38:34,555 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 05:38:34,728 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:38:34,728 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 29 treesize of output 17 [2021-06-05 05:38:34,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:38:34,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:38:34,735 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 05:38:34,735 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:38:34,927 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:34,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884668442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:34,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:34,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:38:34,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896376428] [2021-06-05 05:38:34,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:38:34,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:34,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:38:34,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1249, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:38:34,928 INFO L87 Difference]: Start difference. First operand 10084 states and 30861 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:38:37,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:37,448 INFO L93 Difference]: Finished difference Result 11406 states and 34747 transitions. [2021-06-05 05:38:37,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:38:37,448 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:38:37,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:37,464 INFO L225 Difference]: With dead ends: 11406 [2021-06-05 05:38:37,464 INFO L226 Difference]: Without dead ends: 11242 [2021-06-05 05:38:37,464 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 1774.5ms TimeCoverageRelationStatistics Valid=254, Invalid=3528, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 05:38:37,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11242 states. [2021-06-05 05:38:37,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11242 to 10018. [2021-06-05 05:38:37,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10018 states, 10017 states have (on average 3.0614954577218727) internal successors, (30667), 10017 states have internal predecessors, (30667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:37,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10018 states to 10018 states and 30667 transitions. [2021-06-05 05:38:37,604 INFO L78 Accepts]: Start accepts. Automaton has 10018 states and 30667 transitions. Word has length 37 [2021-06-05 05:38:37,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:37,604 INFO L482 AbstractCegarLoop]: Abstraction has 10018 states and 30667 transitions. [2021-06-05 05:38:37,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:38:37,604 INFO L276 IsEmpty]: Start isEmpty. Operand 10018 states and 30667 transitions. [2021-06-05 05:38:37,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:38:37,615 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:37,616 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:37,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-06-05 05:38:37,816 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:37,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:37,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1754628988, now seen corresponding path program 131 times [2021-06-05 05:38:37,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:37,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110728672] [2021-06-05 05:38:37,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:37,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:38,131 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:38,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:38,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110728672] [2021-06-05 05:38:38,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110728672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:38,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732090085] [2021-06-05 05:38:38,131 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:38,157 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:38:38,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:38,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 05:38:38,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:38,365 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:38:38,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 05:38:38,366 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:38:38,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:38:38,373 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 05:38:38,373 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 05:38:38,590 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:38:38,591 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 30 treesize of output 18 [2021-06-05 05:38:38,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:38:38,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:38:38,597 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 05:38:38,597 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 05:38:38,792 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:38,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732090085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:38,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:38,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:38:38,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578884957] [2021-06-05 05:38:38,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:38:38,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:38,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:38:38,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1249, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:38:38,793 INFO L87 Difference]: Start difference. First operand 10018 states and 30667 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:38:41,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:41,503 INFO L93 Difference]: Finished difference Result 11821 states and 35885 transitions. [2021-06-05 05:38:41,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 05:38:41,504 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:38:41,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:41,519 INFO L225 Difference]: With dead ends: 11821 [2021-06-05 05:38:41,520 INFO L226 Difference]: Without dead ends: 11572 [2021-06-05 05:38:41,520 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 2016.6ms TimeCoverageRelationStatistics Valid=304, Invalid=4118, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 05:38:41,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11572 states. [2021-06-05 05:38:41,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11572 to 10051. [2021-06-05 05:38:41,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10051 states, 10050 states have (on average 3.0612935323383086) internal successors, (30766), 10050 states have internal predecessors, (30766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:41,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10051 states to 10051 states and 30766 transitions. [2021-06-05 05:38:41,678 INFO L78 Accepts]: Start accepts. Automaton has 10051 states and 30766 transitions. Word has length 37 [2021-06-05 05:38:41,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:41,678 INFO L482 AbstractCegarLoop]: Abstraction has 10051 states and 30766 transitions. [2021-06-05 05:38:41,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:38:41,678 INFO L276 IsEmpty]: Start isEmpty. Operand 10051 states and 30766 transitions. [2021-06-05 05:38:41,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:38:41,689 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:41,689 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:41,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2021-06-05 05:38:41,889 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:41,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:41,890 INFO L82 PathProgramCache]: Analyzing trace with hash 547757838, now seen corresponding path program 132 times [2021-06-05 05:38:41,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:41,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438475990] [2021-06-05 05:38:41,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:41,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:42,203 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:42,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:42,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438475990] [2021-06-05 05:38:42,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438475990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:42,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701354548] [2021-06-05 05:38:42,204 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:42,229 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:38:42,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:42,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:38:42,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:42,442 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:38:42,442 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 31 treesize of output 19 [2021-06-05 05:38:42,443 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:38:42,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:38:42,450 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 05:38:42,450 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:33 [2021-06-05 05:38:42,668 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:38:42,668 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 44 treesize of output 24 [2021-06-05 05:38:42,669 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:38:42,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:38:42,675 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 05:38:42,675 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:25 [2021-06-05 05:38:42,823 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:42,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701354548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:42,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:42,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:38:42,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545921202] [2021-06-05 05:38:42,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:38:42,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:42,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:38:42,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1251, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:38:42,824 INFO L87 Difference]: Start difference. First operand 10051 states and 30766 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:38:45,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:45,122 INFO L93 Difference]: Finished difference Result 11899 states and 36165 transitions. [2021-06-05 05:38:45,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:38:45,123 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:38:45,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:45,138 INFO L225 Difference]: With dead ends: 11899 [2021-06-05 05:38:45,138 INFO L226 Difference]: Without dead ends: 11674 [2021-06-05 05:38:45,138 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 1695.6ms TimeCoverageRelationStatistics Valid=245, Invalid=3415, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 05:38:45,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11674 states. [2021-06-05 05:38:45,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11674 to 10015. [2021-06-05 05:38:45,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10015 states, 10014 states have (on average 3.06291192330737) internal successors, (30672), 10014 states have internal predecessors, (30672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:45,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10015 states to 10015 states and 30672 transitions. [2021-06-05 05:38:45,278 INFO L78 Accepts]: Start accepts. Automaton has 10015 states and 30672 transitions. Word has length 37 [2021-06-05 05:38:45,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:45,278 INFO L482 AbstractCegarLoop]: Abstraction has 10015 states and 30672 transitions. [2021-06-05 05:38:45,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:38:45,279 INFO L276 IsEmpty]: Start isEmpty. Operand 10015 states and 30672 transitions. [2021-06-05 05:38:45,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:38:45,290 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:45,290 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:45,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:45,490 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:45,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:45,490 INFO L82 PathProgramCache]: Analyzing trace with hash 859170464, now seen corresponding path program 133 times [2021-06-05 05:38:45,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:45,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601497501] [2021-06-05 05:38:45,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:45,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:45,840 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:45,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:45,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601497501] [2021-06-05 05:38:45,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601497501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:45,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085539104] [2021-06-05 05:38:45,840 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:45,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:45,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:38:45,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:46,030 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:38:46,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 05:38:46,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:38:46,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:38:46,038 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 05:38:46,038 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 05:38:46,216 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:38:46,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 05:38:46,219 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:38:46,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:38:46,224 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 05:38:46,224 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:38:46,382 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:46,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085539104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:46,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:46,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 05:38:46,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111271560] [2021-06-05 05:38:46,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:38:46,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:46,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:38:46,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:38:46,383 INFO L87 Difference]: Start difference. First operand 10015 states and 30672 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:38:49,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:49,191 INFO L93 Difference]: Finished difference Result 13542 states and 40720 transitions. [2021-06-05 05:38:49,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 05:38:49,191 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:38:49,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:49,211 INFO L225 Difference]: With dead ends: 13542 [2021-06-05 05:38:49,211 INFO L226 Difference]: Without dead ends: 13360 [2021-06-05 05:38:49,211 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1407 ImplicationChecksByTransitivity, 2107.4ms TimeCoverageRelationStatistics Valid=562, Invalid=5290, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 05:38:49,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13360 states. [2021-06-05 05:38:49,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13360 to 10030. [2021-06-05 05:38:49,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10030 states, 10029 states have (on average 3.061421876557982) internal successors, (30703), 10029 states have internal predecessors, (30703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:49,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10030 states to 10030 states and 30703 transitions. [2021-06-05 05:38:49,362 INFO L78 Accepts]: Start accepts. Automaton has 10030 states and 30703 transitions. Word has length 37 [2021-06-05 05:38:49,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:49,362 INFO L482 AbstractCegarLoop]: Abstraction has 10030 states and 30703 transitions. [2021-06-05 05:38:49,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:38:49,363 INFO L276 IsEmpty]: Start isEmpty. Operand 10030 states and 30703 transitions. [2021-06-05 05:38:49,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:38:49,373 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:49,373 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:49,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:49,574 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:49,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:49,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1739490592, now seen corresponding path program 134 times [2021-06-05 05:38:49,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:49,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269327806] [2021-06-05 05:38:49,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:49,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:49,880 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:49,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:49,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269327806] [2021-06-05 05:38:49,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269327806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:49,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274102975] [2021-06-05 05:38:49,881 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:49,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:38:49,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:49,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:38:49,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:50,077 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:38:50,077 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 27 treesize of output 15 [2021-06-05 05:38:50,078 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:38:50,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:38:50,084 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 05:38:50,084 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:25 [2021-06-05 05:38:50,318 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:38:50,318 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 29 treesize of output 17 [2021-06-05 05:38:50,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:38:50,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:38:50,325 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 05:38:50,325 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:38:50,519 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:50,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274102975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:50,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:50,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:38:50,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253394123] [2021-06-05 05:38:50,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:38:50,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:50,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:38:50,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1250, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:38:50,520 INFO L87 Difference]: Start difference. First operand 10030 states and 30703 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:38:52,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:52,855 INFO L93 Difference]: Finished difference Result 11133 states and 33857 transitions. [2021-06-05 05:38:52,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 05:38:52,856 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:38:52,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:52,871 INFO L225 Difference]: With dead ends: 11133 [2021-06-05 05:38:52,871 INFO L226 Difference]: Without dead ends: 10930 [2021-06-05 05:38:52,871 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 2005.2ms TimeCoverageRelationStatistics Valid=305, Invalid=4117, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 05:38:52,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10930 states. [2021-06-05 05:38:53,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10930 to 10015. [2021-06-05 05:38:53,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10015 states, 10014 states have (on average 3.062612342720192) internal successors, (30669), 10014 states have internal predecessors, (30669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:53,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10015 states to 10015 states and 30669 transitions. [2021-06-05 05:38:53,043 INFO L78 Accepts]: Start accepts. Automaton has 10015 states and 30669 transitions. Word has length 37 [2021-06-05 05:38:53,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:53,043 INFO L482 AbstractCegarLoop]: Abstraction has 10015 states and 30669 transitions. [2021-06-05 05:38:53,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:38:53,043 INFO L276 IsEmpty]: Start isEmpty. Operand 10015 states and 30669 transitions. [2021-06-05 05:38:53,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:38:53,055 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:53,055 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:53,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:53,256 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:53,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:53,256 INFO L82 PathProgramCache]: Analyzing trace with hash -885193542, now seen corresponding path program 135 times [2021-06-05 05:38:53,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:53,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244808009] [2021-06-05 05:38:53,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:53,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:53,599 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:53,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:53,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244808009] [2021-06-05 05:38:53,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244808009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:53,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013664649] [2021-06-05 05:38:53,600 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:53,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:38:53,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:53,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:38:53,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:53,788 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:38:53,789 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 27 treesize of output 15 [2021-06-05 05:38:53,790 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:38:53,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:38:53,795 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 05:38:53,795 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:25 [2021-06-05 05:38:53,985 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:38:53,985 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 29 treesize of output 17 [2021-06-05 05:38:53,986 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:38:53,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:38:53,992 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 05:38:53,992 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:38:54,155 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:54,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013664649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:54,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:54,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 05:38:54,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856901789] [2021-06-05 05:38:54,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:38:54,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:54,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:38:54,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1369, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:38:54,156 INFO L87 Difference]: Start difference. First operand 10015 states and 30669 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:38:56,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:38:56,658 INFO L93 Difference]: Finished difference Result 13770 states and 41415 transitions. [2021-06-05 05:38:56,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 05:38:56,658 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:38:56,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:38:56,678 INFO L225 Difference]: With dead ends: 13770 [2021-06-05 05:38:56,678 INFO L226 Difference]: Without dead ends: 13588 [2021-06-05 05:38:56,679 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1475 ImplicationChecksByTransitivity, 2240.8ms TimeCoverageRelationStatistics Valid=550, Invalid=5456, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 05:38:56,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13588 states. [2021-06-05 05:38:56,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13588 to 10015. [2021-06-05 05:38:56,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10015 states, 10014 states have (on average 3.061314160175754) internal successors, (30656), 10014 states have internal predecessors, (30656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:38:56,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10015 states to 10015 states and 30656 transitions. [2021-06-05 05:38:56,838 INFO L78 Accepts]: Start accepts. Automaton has 10015 states and 30656 transitions. Word has length 37 [2021-06-05 05:38:56,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:38:56,838 INFO L482 AbstractCegarLoop]: Abstraction has 10015 states and 30656 transitions. [2021-06-05 05:38:56,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:38:56,838 INFO L276 IsEmpty]: Start isEmpty. Operand 10015 states and 30656 transitions. [2021-06-05 05:38:56,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:38:56,849 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:38:56,849 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:38:57,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-06-05 05:38:57,050 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:38:57,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:38:57,050 INFO L82 PathProgramCache]: Analyzing trace with hash 811112698, now seen corresponding path program 136 times [2021-06-05 05:38:57,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:38:57,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310763767] [2021-06-05 05:38:57,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:38:57,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:38:57,351 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:57,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:38:57,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310763767] [2021-06-05 05:38:57,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310763767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:57,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814369381] [2021-06-05 05:38:57,352 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:38:57,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:38:57,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:38:57,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:38:57,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:38:57,540 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:38:57,541 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 25 treesize of output 13 [2021-06-05 05:38:57,541 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:38:57,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:38:57,547 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 05:38:57,547 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:22 [2021-06-05 05:38:57,746 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:38:57,746 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 29 treesize of output 17 [2021-06-05 05:38:57,747 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:38:57,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:38:57,752 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 05:38:57,752 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:38:57,942 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:38:57,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814369381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:38:57,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:38:57,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:38:57,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112698489] [2021-06-05 05:38:57,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:38:57,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:38:57,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:38:57,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1249, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:38:57,943 INFO L87 Difference]: Start difference. First operand 10015 states and 30656 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:39:00,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:00,109 INFO L93 Difference]: Finished difference Result 11289 states and 34375 transitions. [2021-06-05 05:39:00,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:39:00,110 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:39:00,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:00,123 INFO L225 Difference]: With dead ends: 11289 [2021-06-05 05:39:00,123 INFO L226 Difference]: Without dead ends: 11125 [2021-06-05 05:39:00,124 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 1689.6ms TimeCoverageRelationStatistics Valid=244, Invalid=3538, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 05:39:00,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11125 states. [2021-06-05 05:39:00,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11125 to 10009. [2021-06-05 05:39:00,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10009 states, 10008 states have (on average 3.061550759392486) internal successors, (30640), 10008 states have internal predecessors, (30640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:00,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10009 states to 10009 states and 30640 transitions. [2021-06-05 05:39:00,246 INFO L78 Accepts]: Start accepts. Automaton has 10009 states and 30640 transitions. Word has length 37 [2021-06-05 05:39:00,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:00,246 INFO L482 AbstractCegarLoop]: Abstraction has 10009 states and 30640 transitions. [2021-06-05 05:39:00,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:39:00,246 INFO L276 IsEmpty]: Start isEmpty. Operand 10009 states and 30640 transitions. [2021-06-05 05:39:00,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:39:00,257 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:00,257 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:00,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-06-05 05:39:00,458 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:00,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:00,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1369600458, now seen corresponding path program 137 times [2021-06-05 05:39:00,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:00,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029178029] [2021-06-05 05:39:00,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:00,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:00,758 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:00,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:00,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029178029] [2021-06-05 05:39:00,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029178029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:00,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049001024] [2021-06-05 05:39:00,759 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:00,787 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:39:00,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:00,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 05:39:00,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:00,953 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:39:00,953 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 29 treesize of output 17 [2021-06-05 05:39:00,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:39:00,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:39:00,960 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 05:39:00,960 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:24 [2021-06-05 05:39:01,100 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:39:01,101 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 37 treesize of output 21 [2021-06-05 05:39:01,101 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:39:01,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:39:01,106 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 05:39:01,106 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:18 [2021-06-05 05:39:01,235 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:01,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049001024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:01,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:01,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-06-05 05:39:01,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978290676] [2021-06-05 05:39:01,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:39:01,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:01,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:39:01,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1101, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:39:01,236 INFO L87 Difference]: Start difference. First operand 10009 states and 30640 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 05:39:02,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:02,946 INFO L93 Difference]: Finished difference Result 11530 states and 34936 transitions. [2021-06-05 05:39:02,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:39:02,946 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 05:39:02,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:02,960 INFO L225 Difference]: With dead ends: 11530 [2021-06-05 05:39:02,960 INFO L226 Difference]: Without dead ends: 11283 [2021-06-05 05:39:02,960 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 1349.8ms TimeCoverageRelationStatistics Valid=257, Invalid=2935, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 05:39:02,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11283 states. [2021-06-05 05:39:03,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11283 to 10060. [2021-06-05 05:39:03,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10060 states, 10059 states have (on average 3.0610398647976935) internal successors, (30791), 10059 states have internal predecessors, (30791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:03,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10060 states to 10060 states and 30791 transitions. [2021-06-05 05:39:03,087 INFO L78 Accepts]: Start accepts. Automaton has 10060 states and 30791 transitions. Word has length 37 [2021-06-05 05:39:03,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:03,087 INFO L482 AbstractCegarLoop]: Abstraction has 10060 states and 30791 transitions. [2021-06-05 05:39:03,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 05:39:03,087 INFO L276 IsEmpty]: Start isEmpty. Operand 10060 states and 30791 transitions. [2021-06-05 05:39:03,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:39:03,098 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:03,098 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:03,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2021-06-05 05:39:03,299 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:03,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:03,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1920374838, now seen corresponding path program 138 times [2021-06-05 05:39:03,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:03,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884705452] [2021-06-05 05:39:03,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:03,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:03,631 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:03,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:03,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884705452] [2021-06-05 05:39:03,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884705452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:03,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449373231] [2021-06-05 05:39:03,631 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:03,657 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:39:03,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:03,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:39:03,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:03,835 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:39:03,835 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 27 treesize of output 15 [2021-06-05 05:39:03,836 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:39:03,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:39:03,843 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 05:39:03,843 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 05:39:04,061 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:39:04,062 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 36 treesize of output 20 [2021-06-05 05:39:04,062 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:39:04,068 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:39:04,069 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 05:39:04,069 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:20 [2021-06-05 05:39:04,232 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:04,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449373231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:04,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:04,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 05:39:04,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600115783] [2021-06-05 05:39:04,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:39:04,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:04,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:39:04,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:39:04,233 INFO L87 Difference]: Start difference. First operand 10060 states and 30791 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:39:07,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:07,179 INFO L93 Difference]: Finished difference Result 13998 states and 42140 transitions. [2021-06-05 05:39:07,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 05:39:07,180 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:39:07,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:07,201 INFO L225 Difference]: With dead ends: 13998 [2021-06-05 05:39:07,202 INFO L226 Difference]: Without dead ends: 13825 [2021-06-05 05:39:07,202 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1327 ImplicationChecksByTransitivity, 2148.6ms TimeCoverageRelationStatistics Valid=477, Invalid=5073, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 05:39:07,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13825 states. [2021-06-05 05:39:07,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13825 to 9973. [2021-06-05 05:39:07,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9973 states, 9972 states have (on average 3.0628760529482553) internal successors, (30543), 9972 states have internal predecessors, (30543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:07,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9973 states to 9973 states and 30543 transitions. [2021-06-05 05:39:07,368 INFO L78 Accepts]: Start accepts. Automaton has 9973 states and 30543 transitions. Word has length 37 [2021-06-05 05:39:07,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:07,368 INFO L482 AbstractCegarLoop]: Abstraction has 9973 states and 30543 transitions. [2021-06-05 05:39:07,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:39:07,368 INFO L276 IsEmpty]: Start isEmpty. Operand 9973 states and 30543 transitions. [2021-06-05 05:39:07,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:39:07,380 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:07,380 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:07,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-06-05 05:39:07,593 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:07,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:07,593 INFO L82 PathProgramCache]: Analyzing trace with hash -2082380068, now seen corresponding path program 139 times [2021-06-05 05:39:07,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:07,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960140213] [2021-06-05 05:39:07,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:07,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:08,008 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:08,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:08,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960140213] [2021-06-05 05:39:08,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960140213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:08,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999533447] [2021-06-05 05:39:08,009 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:08,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:08,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:39:08,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:08,220 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:39:08,220 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 25 treesize of output 13 [2021-06-05 05:39:08,221 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:39:08,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:39:08,226 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 05:39:08,227 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:24 [2021-06-05 05:39:08,412 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:39:08,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 05:39:08,413 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:39:08,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:39:08,418 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 05:39:08,418 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:39:08,578 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:08,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999533447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:08,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:08,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 05:39:08,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618138112] [2021-06-05 05:39:08,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:39:08,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:08,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:39:08,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:39:08,579 INFO L87 Difference]: Start difference. First operand 9973 states and 30543 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:39:10,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:10,678 INFO L93 Difference]: Finished difference Result 13546 states and 40841 transitions. [2021-06-05 05:39:10,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 05:39:10,679 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:39:10,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:10,729 INFO L225 Difference]: With dead ends: 13546 [2021-06-05 05:39:10,730 INFO L226 Difference]: Without dead ends: 13364 [2021-06-05 05:39:10,730 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1211 ImplicationChecksByTransitivity, 1942.0ms TimeCoverageRelationStatistics Valid=427, Invalid=4685, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 05:39:10,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13364 states. [2021-06-05 05:39:10,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13364 to 9949. [2021-06-05 05:39:10,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9949 states, 9948 states have (on average 3.0618214716525936) internal successors, (30459), 9948 states have internal predecessors, (30459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:10,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9949 states to 9949 states and 30459 transitions. [2021-06-05 05:39:10,869 INFO L78 Accepts]: Start accepts. Automaton has 9949 states and 30459 transitions. Word has length 37 [2021-06-05 05:39:10,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:10,869 INFO L482 AbstractCegarLoop]: Abstraction has 9949 states and 30459 transitions. [2021-06-05 05:39:10,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:39:10,869 INFO L276 IsEmpty]: Start isEmpty. Operand 9949 states and 30459 transitions. [2021-06-05 05:39:10,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:39:10,880 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:10,880 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:11,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:11,085 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:11,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:11,085 INFO L82 PathProgramCache]: Analyzing trace with hash -386073828, now seen corresponding path program 140 times [2021-06-05 05:39:11,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:11,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935122929] [2021-06-05 05:39:11,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:11,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:11,374 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:11,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:11,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935122929] [2021-06-05 05:39:11,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935122929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:11,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824344650] [2021-06-05 05:39:11,374 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:11,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:39:11,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:11,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:39:11,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:11,563 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:39:11,564 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 25 treesize of output 13 [2021-06-05 05:39:11,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:39:11,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:39:11,570 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 05:39:11,570 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:22 [2021-06-05 05:39:11,763 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:39:11,763 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 29 treesize of output 17 [2021-06-05 05:39:11,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:39:11,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:39:11,769 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 05:39:11,769 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:39:11,962 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:11,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824344650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:11,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:11,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:39:11,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081607119] [2021-06-05 05:39:11,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:39:11,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:11,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:39:11,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1249, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:39:11,963 INFO L87 Difference]: Start difference. First operand 9949 states and 30459 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:39:14,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:14,242 INFO L93 Difference]: Finished difference Result 11253 states and 34294 transitions. [2021-06-05 05:39:14,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:39:14,242 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:39:14,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:14,257 INFO L225 Difference]: With dead ends: 11253 [2021-06-05 05:39:14,257 INFO L226 Difference]: Without dead ends: 11089 [2021-06-05 05:39:14,257 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 1675.3ms TimeCoverageRelationStatistics Valid=252, Invalid=3530, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 05:39:14,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11089 states. [2021-06-05 05:39:14,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11089 to 9925. [2021-06-05 05:39:14,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9925 states, 9924 states have (on average 3.0620717452640065) internal successors, (30388), 9924 states have internal predecessors, (30388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:14,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9925 states to 9925 states and 30388 transitions. [2021-06-05 05:39:14,395 INFO L78 Accepts]: Start accepts. Automaton has 9925 states and 30388 transitions. Word has length 37 [2021-06-05 05:39:14,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:14,395 INFO L482 AbstractCegarLoop]: Abstraction has 9925 states and 30388 transitions. [2021-06-05 05:39:14,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:39:14,395 INFO L276 IsEmpty]: Start isEmpty. Operand 9925 states and 30388 transitions. [2021-06-05 05:39:14,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:39:14,406 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:14,407 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:14,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable253 [2021-06-05 05:39:14,607 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:14,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:14,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1728180312, now seen corresponding path program 141 times [2021-06-05 05:39:14,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:14,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773155717] [2021-06-05 05:39:14,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:14,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:14,901 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:14,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:14,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773155717] [2021-06-05 05:39:14,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773155717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:14,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641209893] [2021-06-05 05:39:14,901 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:14,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:39:14,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:14,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:39:14,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:15,102 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:39:15,102 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 27 treesize of output 15 [2021-06-05 05:39:15,103 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:39:15,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:39:15,109 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 05:39:15,109 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 05:39:15,359 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:39:15,359 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 44 treesize of output 24 [2021-06-05 05:39:15,360 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:39:15,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:39:15,366 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 05:39:15,366 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:25 [2021-06-05 05:39:15,519 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:15,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641209893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:15,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:15,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 05:39:15,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845142423] [2021-06-05 05:39:15,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:39:15,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:15,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:39:15,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1249, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:39:15,520 INFO L87 Difference]: Start difference. First operand 9925 states and 30388 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:39:17,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:17,866 INFO L93 Difference]: Finished difference Result 11364 states and 34628 transitions. [2021-06-05 05:39:17,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:39:17,866 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:39:17,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:17,881 INFO L225 Difference]: With dead ends: 11364 [2021-06-05 05:39:17,882 INFO L226 Difference]: Without dead ends: 11119 [2021-06-05 05:39:17,882 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1891.8ms TimeCoverageRelationStatistics Valid=274, Invalid=3758, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 05:39:17,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11119 states. [2021-06-05 05:39:17,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11119 to 9871. [2021-06-05 05:39:17,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9871 states, 9870 states have (on average 3.0641337386018237) internal successors, (30243), 9870 states have internal predecessors, (30243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:18,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9871 states to 9871 states and 30243 transitions. [2021-06-05 05:39:18,015 INFO L78 Accepts]: Start accepts. Automaton has 9871 states and 30243 transitions. Word has length 37 [2021-06-05 05:39:18,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:18,015 INFO L482 AbstractCegarLoop]: Abstraction has 9871 states and 30243 transitions. [2021-06-05 05:39:18,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 05:39:18,015 INFO L276 IsEmpty]: Start isEmpty. Operand 9871 states and 30243 transitions. [2021-06-05 05:39:18,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:39:18,026 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:18,026 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:18,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-06-05 05:39:18,227 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:18,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:18,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1079595590, now seen corresponding path program 142 times [2021-06-05 05:39:18,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:18,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430323444] [2021-06-05 05:39:18,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:18,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:18,570 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:18,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:18,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430323444] [2021-06-05 05:39:18,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430323444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:18,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366081985] [2021-06-05 05:39:18,570 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:18,595 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:39:18,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:18,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:39:18,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:18,769 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:39:18,769 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 27 treesize of output 15 [2021-06-05 05:39:18,770 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:39:18,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:39:18,776 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 05:39:18,776 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:25 [2021-06-05 05:39:18,964 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:39:18,964 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 29 treesize of output 17 [2021-06-05 05:39:18,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:39:18,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:39:18,970 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 05:39:18,971 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 05:39:19,136 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:19,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366081985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:19,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:19,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 05:39:19,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136265405] [2021-06-05 05:39:19,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:39:19,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:19,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:39:19,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:39:19,137 INFO L87 Difference]: Start difference. First operand 9871 states and 30243 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:39:21,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:21,395 INFO L93 Difference]: Finished difference Result 14084 states and 42790 transitions. [2021-06-05 05:39:21,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 05:39:21,395 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:39:21,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:21,421 INFO L225 Difference]: With dead ends: 14084 [2021-06-05 05:39:21,421 INFO L226 Difference]: Without dead ends: 13992 [2021-06-05 05:39:21,422 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1263 ImplicationChecksByTransitivity, 1915.7ms TimeCoverageRelationStatistics Valid=451, Invalid=4805, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 05:39:21,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13992 states. [2021-06-05 05:39:21,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13992 to 9993. [2021-06-05 05:39:21,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9993 states, 9992 states have (on average 3.0624499599679744) internal successors, (30600), 9992 states have internal predecessors, (30600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:21,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9993 states to 9993 states and 30600 transitions. [2021-06-05 05:39:21,585 INFO L78 Accepts]: Start accepts. Automaton has 9993 states and 30600 transitions. Word has length 37 [2021-06-05 05:39:21,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:21,585 INFO L482 AbstractCegarLoop]: Abstraction has 9993 states and 30600 transitions. [2021-06-05 05:39:21,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 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 05:39:21,586 INFO L276 IsEmpty]: Start isEmpty. Operand 9993 states and 30600 transitions. [2021-06-05 05:39:21,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:39:21,597 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:21,597 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:21,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-06-05 05:39:21,798 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:21,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:21,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1519065466, now seen corresponding path program 143 times [2021-06-05 05:39:21,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:21,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755700455] [2021-06-05 05:39:21,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:21,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:22,136 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:22,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:22,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755700455] [2021-06-05 05:39:22,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755700455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:22,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247713897] [2021-06-05 05:39:22,136 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:22,163 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:39:22,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:22,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:39:22,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:22,361 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:39:22,361 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 27 treesize of output 15 [2021-06-05 05:39:22,362 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:39:22,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:39:22,368 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 05:39:22,368 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:25 [2021-06-05 05:39:22,546 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:39:22,547 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 29 treesize of output 17 [2021-06-05 05:39:22,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:39:22,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:39:22,553 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 05:39:22,553 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:17 [2021-06-05 05:39:22,708 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:22,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247713897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:22,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:22,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-06-05 05:39:22,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792895847] [2021-06-05 05:39:22,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:39:22,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:22,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:39:22,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1098, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:39:22,709 INFO L87 Difference]: Start difference. First operand 9993 states and 30600 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 05:39:24,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:24,159 INFO L93 Difference]: Finished difference Result 11852 states and 36185 transitions. [2021-06-05 05:39:24,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 05:39:24,159 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 05:39:24,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:24,175 INFO L225 Difference]: With dead ends: 11852 [2021-06-05 05:39:24,176 INFO L226 Difference]: Without dead ends: 11794 [2021-06-05 05:39:24,176 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 1257.1ms TimeCoverageRelationStatistics Valid=212, Invalid=2440, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 05:39:24,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11794 states. [2021-06-05 05:39:24,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11794 to 9787. [2021-06-05 05:39:24,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9787 states, 9786 states have (on average 3.066830165542612) internal successors, (30012), 9786 states have internal predecessors, (30012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:24,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9787 states to 9787 states and 30012 transitions. [2021-06-05 05:39:24,295 INFO L78 Accepts]: Start accepts. Automaton has 9787 states and 30012 transitions. Word has length 37 [2021-06-05 05:39:24,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:24,295 INFO L482 AbstractCegarLoop]: Abstraction has 9787 states and 30012 transitions. [2021-06-05 05:39:24,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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 05:39:24,295 INFO L276 IsEmpty]: Start isEmpty. Operand 9787 states and 30012 transitions. [2021-06-05 05:39:24,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:39:24,305 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:24,305 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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 05:39:24,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:24,506 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:24,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:24,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1180480077, now seen corresponding path program 144 times [2021-06-05 05:39:24,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:24,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540249574] [2021-06-05 05:39:24,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:24,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:24,534 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:24,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:24,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540249574] [2021-06-05 05:39:24,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540249574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:24,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696163681] [2021-06-05 05:39:24,534 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:24,564 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:39:24,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:24,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 05:39:24,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:24,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:39:24,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:39:24,667 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:39:24,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:39:24,671 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 05:39:24,671 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:17, output treesize:3 [2021-06-05 05:39:24,689 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:24,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696163681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:24,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:24,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 05:39:24,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203320709] [2021-06-05 05:39:24,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:39:24,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:24,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:39:24,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:39:24,690 INFO L87 Difference]: Start difference. First operand 9787 states and 30012 transitions. Second operand has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:24,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:24,897 INFO L93 Difference]: Finished difference Result 14719 states and 43834 transitions. [2021-06-05 05:39:24,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:39:24,897 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:39:24,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:24,922 INFO L225 Difference]: With dead ends: 14719 [2021-06-05 05:39:24,922 INFO L226 Difference]: Without dead ends: 14719 [2021-06-05 05:39:24,923 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 108.4ms TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:39:24,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14719 states. [2021-06-05 05:39:25,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14719 to 7251. [2021-06-05 05:39:25,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7251 states, 7250 states have (on average 2.9986206896551724) internal successors, (21740), 7250 states have internal predecessors, (21740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:25,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7251 states to 7251 states and 21740 transitions. [2021-06-05 05:39:25,081 INFO L78 Accepts]: Start accepts. Automaton has 7251 states and 21740 transitions. Word has length 40 [2021-06-05 05:39:25,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:25,082 INFO L482 AbstractCegarLoop]: Abstraction has 7251 states and 21740 transitions. [2021-06-05 05:39:25,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:25,082 INFO L276 IsEmpty]: Start isEmpty. Operand 7251 states and 21740 transitions. [2021-06-05 05:39:25,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 05:39:25,090 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:25,090 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:25,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:25,291 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:25,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:25,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1976946397, now seen corresponding path program 145 times [2021-06-05 05:39:25,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:25,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952630406] [2021-06-05 05:39:25,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:25,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:25,313 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:39:25,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:25,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952630406] [2021-06-05 05:39:25,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952630406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:25,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50634906] [2021-06-05 05:39:25,313 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:25,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:25,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:39:25,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:25,376 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:39:25,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50634906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:25,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:25,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 05:39:25,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469200517] [2021-06-05 05:39:25,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:39:25,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:25,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:39:25,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:39:25,377 INFO L87 Difference]: Start difference. First operand 7251 states and 21740 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 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 05:39:25,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:25,417 INFO L93 Difference]: Finished difference Result 12876 states and 38235 transitions. [2021-06-05 05:39:25,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:39:25,418 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 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 41 [2021-06-05 05:39:25,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:25,436 INFO L225 Difference]: With dead ends: 12876 [2021-06-05 05:39:25,436 INFO L226 Difference]: Without dead ends: 12623 [2021-06-05 05:39:25,437 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 8.6ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:39:25,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12623 states. [2021-06-05 05:39:25,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12623 to 9029. [2021-06-05 05:39:25,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9029 states, 9028 states have (on average 3.026251661497563) internal successors, (27321), 9028 states have internal predecessors, (27321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:25,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9029 states to 9029 states and 27321 transitions. [2021-06-05 05:39:25,572 INFO L78 Accepts]: Start accepts. Automaton has 9029 states and 27321 transitions. Word has length 41 [2021-06-05 05:39:25,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:25,572 INFO L482 AbstractCegarLoop]: Abstraction has 9029 states and 27321 transitions. [2021-06-05 05:39:25,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 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 05:39:25,572 INFO L276 IsEmpty]: Start isEmpty. Operand 9029 states and 27321 transitions. [2021-06-05 05:39:25,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:39:25,581 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:25,581 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:25,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:25,785 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:25,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:25,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1280099314, now seen corresponding path program 146 times [2021-06-05 05:39:25,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:25,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009024796] [2021-06-05 05:39:25,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:25,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:25,810 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:25,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:25,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009024796] [2021-06-05 05:39:25,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009024796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:25,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839122270] [2021-06-05 05:39:25,810 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:25,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:39:25,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:25,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:39:25,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:25,875 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:25,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839122270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:25,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:25,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 05:39:25,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110633517] [2021-06-05 05:39:25,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:39:25,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:25,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:39:25,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:39:25,876 INFO L87 Difference]: Start difference. First operand 9029 states and 27321 transitions. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:25,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:25,929 INFO L93 Difference]: Finished difference Result 18744 states and 57280 transitions. [2021-06-05 05:39:25,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:39:25,930 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:39:25,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:25,956 INFO L225 Difference]: With dead ends: 18744 [2021-06-05 05:39:25,956 INFO L226 Difference]: Without dead ends: 18363 [2021-06-05 05:39:25,956 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 8.4ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:39:25,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18363 states. [2021-06-05 05:39:26,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18363 to 15994. [2021-06-05 05:39:26,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15994 states, 15993 states have (on average 3.1260551491277435) internal successors, (49995), 15993 states have internal predecessors, (49995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:26,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15994 states to 15994 states and 49995 transitions. [2021-06-05 05:39:26,180 INFO L78 Accepts]: Start accepts. Automaton has 15994 states and 49995 transitions. Word has length 42 [2021-06-05 05:39:26,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:26,180 INFO L482 AbstractCegarLoop]: Abstraction has 15994 states and 49995 transitions. [2021-06-05 05:39:26,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:26,180 INFO L276 IsEmpty]: Start isEmpty. Operand 15994 states and 49995 transitions. [2021-06-05 05:39:26,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 05:39:26,199 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:26,199 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 05:39:26,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:26,399 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:26,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:26,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1019224685, now seen corresponding path program 147 times [2021-06-05 05:39:26,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:26,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688138061] [2021-06-05 05:39:26,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:26,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:26,483 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:39:26,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:26,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688138061] [2021-06-05 05:39:26,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688138061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:26,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910586752] [2021-06-05 05:39:26,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:26,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:39:26,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:26,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 05:39:26,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:26,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:39:26,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:39:26,918 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 51 treesize of output 29 [2021-06-05 05:39:26,919 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:39:26,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:39:26,933 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 05:39:26,933 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:85, output treesize:49 [2021-06-05 05:39:27,067 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:39:27,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910586752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:27,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:27,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 17] total 26 [2021-06-05 05:39:27,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501585842] [2021-06-05 05:39:27,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:39:27,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:27,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:39:27,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:39:27,068 INFO L87 Difference]: Start difference. First operand 15994 states and 49995 transitions. Second operand has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:29,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:29,598 INFO L93 Difference]: Finished difference Result 23103 states and 71053 transitions. [2021-06-05 05:39:29,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 05:39:29,598 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 05:39:29,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:29,634 INFO L225 Difference]: With dead ends: 23103 [2021-06-05 05:39:29,634 INFO L226 Difference]: Without dead ends: 23103 [2021-06-05 05:39:29,634 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 1744.1ms TimeCoverageRelationStatistics Valid=412, Invalid=4280, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 05:39:29,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23103 states. [2021-06-05 05:39:29,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23103 to 18466. [2021-06-05 05:39:29,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18466 states, 18465 states have (on average 3.106959111833198) internal successors, (57370), 18465 states have internal predecessors, (57370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:30,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18466 states to 18466 states and 57370 transitions. [2021-06-05 05:39:30,013 INFO L78 Accepts]: Start accepts. Automaton has 18466 states and 57370 transitions. Word has length 45 [2021-06-05 05:39:30,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:30,013 INFO L482 AbstractCegarLoop]: Abstraction has 18466 states and 57370 transitions. [2021-06-05 05:39:30,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:30,013 INFO L276 IsEmpty]: Start isEmpty. Operand 18466 states and 57370 transitions. [2021-06-05 05:39:30,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 05:39:30,034 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:30,034 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 05:39:30,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:30,235 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:30,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:30,235 INFO L82 PathProgramCache]: Analyzing trace with hash 701638189, now seen corresponding path program 148 times [2021-06-05 05:39:30,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:30,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855456317] [2021-06-05 05:39:30,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:30,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:30,328 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:30,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:30,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855456317] [2021-06-05 05:39:30,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855456317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:30,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300537350] [2021-06-05 05:39:30,329 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:30,356 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:39:30,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:30,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 05:39:30,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:30,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:39:30,476 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 13 treesize of output 7 [2021-06-05 05:39:30,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:39:30,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:39:30,482 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 05:39:30,482 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:26, output treesize:7 [2021-06-05 05:39:30,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:39:30,511 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:39:30,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:39:30,512 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 05:39:30,512 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 05:39:30,536 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:30,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300537350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:30,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:30,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-05 05:39:30,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464970064] [2021-06-05 05:39:30,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:39:30,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:30,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:39:30,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:39:30,537 INFO L87 Difference]: Start difference. First operand 18466 states and 57370 transitions. Second operand has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:31,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:31,025 INFO L93 Difference]: Finished difference Result 29935 states and 92230 transitions. [2021-06-05 05:39:31,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:39:31,025 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 05:39:31,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:31,071 INFO L225 Difference]: With dead ends: 29935 [2021-06-05 05:39:31,071 INFO L226 Difference]: Without dead ends: 29935 [2021-06-05 05:39:31,071 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 291.4ms TimeCoverageRelationStatistics Valid=172, Invalid=950, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:39:31,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29935 states. [2021-06-05 05:39:31,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29935 to 20625. [2021-06-05 05:39:31,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20625 states, 20624 states have (on average 3.1061869666408066) internal successors, (64062), 20624 states have internal predecessors, (64062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:31,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20625 states to 20625 states and 64062 transitions. [2021-06-05 05:39:31,555 INFO L78 Accepts]: Start accepts. Automaton has 20625 states and 64062 transitions. Word has length 45 [2021-06-05 05:39:31,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:31,555 INFO L482 AbstractCegarLoop]: Abstraction has 20625 states and 64062 transitions. [2021-06-05 05:39:31,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:31,555 INFO L276 IsEmpty]: Start isEmpty. Operand 20625 states and 64062 transitions. [2021-06-05 05:39:31,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 05:39:31,581 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:31,581 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 05:39:31,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:31,782 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:31,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:31,782 INFO L82 PathProgramCache]: Analyzing trace with hash 380212589, now seen corresponding path program 149 times [2021-06-05 05:39:31,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:31,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588475993] [2021-06-05 05:39:31,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:31,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:31,874 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:39:31,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:31,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588475993] [2021-06-05 05:39:31,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588475993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:31,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640605575] [2021-06-05 05:39:31,875 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:31,903 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:39:31,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:31,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 05:39:31,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:31,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:39:31,986 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:39:31,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:39:31,989 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 05:39:31,989 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:9 [2021-06-05 05:39:32,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:39:32,046 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 11 treesize of output 7 [2021-06-05 05:39:32,047 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:39:32,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:39:32,051 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 05:39:32,051 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-06-05 05:39:32,083 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:39:32,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640605575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:32,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:32,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 05:39:32,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970354126] [2021-06-05 05:39:32,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:39:32,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:32,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:39:32,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:39:32,084 INFO L87 Difference]: Start difference. First operand 20625 states and 64062 transitions. Second operand has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:32,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:32,662 INFO L93 Difference]: Finished difference Result 35863 states and 110465 transitions. [2021-06-05 05:39:32,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:39:32,663 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 05:39:32,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:32,724 INFO L225 Difference]: With dead ends: 35863 [2021-06-05 05:39:32,724 INFO L226 Difference]: Without dead ends: 35863 [2021-06-05 05:39:32,724 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 378.0ms TimeCoverageRelationStatistics Valid=219, Invalid=1263, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:39:32,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35863 states. [2021-06-05 05:39:33,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35863 to 20780. [2021-06-05 05:39:33,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20780 states, 20779 states have (on average 3.106020501467828) internal successors, (64540), 20779 states have internal predecessors, (64540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:33,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20780 states to 20780 states and 64540 transitions. [2021-06-05 05:39:33,115 INFO L78 Accepts]: Start accepts. Automaton has 20780 states and 64540 transitions. Word has length 45 [2021-06-05 05:39:33,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:33,115 INFO L482 AbstractCegarLoop]: Abstraction has 20780 states and 64540 transitions. [2021-06-05 05:39:33,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:33,115 INFO L276 IsEmpty]: Start isEmpty. Operand 20780 states and 64540 transitions. [2021-06-05 05:39:33,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 05:39:33,138 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:33,138 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 05:39:33,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable265,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:33,339 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:33,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:33,339 INFO L82 PathProgramCache]: Analyzing trace with hash 2033549703, now seen corresponding path program 150 times [2021-06-05 05:39:33,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:33,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989606729] [2021-06-05 05:39:33,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:33,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:33,542 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:39:33,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:33,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989606729] [2021-06-05 05:39:33,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989606729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:33,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665515420] [2021-06-05 05:39:33,543 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:33,571 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:39:33,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:33,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:39:33,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:33,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:39:33,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 05:39:33,710 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:39:33,714 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:39:33,714 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 05:39:33,715 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:28, output treesize:9 [2021-06-05 05:39:33,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:39:33,758 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:39:33,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:39:33,759 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 05:39:33,759 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 05:39:33,791 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:39:33,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665515420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:33,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:33,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:39:33,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456098623] [2021-06-05 05:39:33,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:39:33,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:33,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:39:33,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:39:33,792 INFO L87 Difference]: Start difference. First operand 20780 states and 64540 transitions. Second operand has 20 states, 20 states have (on average 3.4) internal successors, (68), 19 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 05:39:34,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:34,464 INFO L93 Difference]: Finished difference Result 38900 states and 119843 transitions. [2021-06-05 05:39:34,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:39:34,464 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 19 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 45 [2021-06-05 05:39:34,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:34,533 INFO L225 Difference]: With dead ends: 38900 [2021-06-05 05:39:34,533 INFO L226 Difference]: Without dead ends: 38900 [2021-06-05 05:39:34,533 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 466.5ms TimeCoverageRelationStatistics Valid=175, Invalid=1157, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:39:34,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38900 states. [2021-06-05 05:39:34,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38900 to 22864. [2021-06-05 05:39:34,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22864 states, 22863 states have (on average 3.1030048550059046) internal successors, (70944), 22863 states have internal predecessors, (70944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:34,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22864 states to 22864 states and 70944 transitions. [2021-06-05 05:39:34,974 INFO L78 Accepts]: Start accepts. Automaton has 22864 states and 70944 transitions. Word has length 45 [2021-06-05 05:39:34,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:34,974 INFO L482 AbstractCegarLoop]: Abstraction has 22864 states and 70944 transitions. [2021-06-05 05:39:34,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 19 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 05:39:34,974 INFO L276 IsEmpty]: Start isEmpty. Operand 22864 states and 70944 transitions. [2021-06-05 05:39:34,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 05:39:34,999 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:35,000 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 05:39:35,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-06-05 05:39:35,200 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:35,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:35,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1975277079, now seen corresponding path program 151 times [2021-06-05 05:39:35,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:35,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33850394] [2021-06-05 05:39:35,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:35,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:35,280 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 05:39:35,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:35,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33850394] [2021-06-05 05:39:35,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33850394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:35,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392850382] [2021-06-05 05:39:35,280 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:35,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:35,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 05:39:35,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:35,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:39:35,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:39:35,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:39:35,360 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 05:39:35,361 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:7 [2021-06-05 05:39:35,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:39:35,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:39:35,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:39:35,385 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 05:39:35,385 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 05:39:35,411 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 05:39:35,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392850382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:35,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:35,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 05:39:35,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543572036] [2021-06-05 05:39:35,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:39:35,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:35,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:39:35,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:39:35,412 INFO L87 Difference]: Start difference. First operand 22864 states and 70944 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:36,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:36,052 INFO L93 Difference]: Finished difference Result 41349 states and 126699 transitions. [2021-06-05 05:39:36,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:39:36,053 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 05:39:36,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:36,115 INFO L225 Difference]: With dead ends: 41349 [2021-06-05 05:39:36,115 INFO L226 Difference]: Without dead ends: 41323 [2021-06-05 05:39:36,115 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 299.4ms TimeCoverageRelationStatistics Valid=244, Invalid=1088, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:39:36,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41323 states. [2021-06-05 05:39:36,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41323 to 22913. [2021-06-05 05:39:36,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22913 states, 22912 states have (on average 3.0903456703910615) internal successors, (70806), 22912 states have internal predecessors, (70806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:36,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22913 states to 22913 states and 70806 transitions. [2021-06-05 05:39:36,518 INFO L78 Accepts]: Start accepts. Automaton has 22913 states and 70806 transitions. Word has length 45 [2021-06-05 05:39:36,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:36,519 INFO L482 AbstractCegarLoop]: Abstraction has 22913 states and 70806 transitions. [2021-06-05 05:39:36,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:36,519 INFO L276 IsEmpty]: Start isEmpty. Operand 22913 states and 70806 transitions. [2021-06-05 05:39:36,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 05:39:36,547 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:36,547 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 05:39:36,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable267,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:36,748 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:36,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:36,748 INFO L82 PathProgramCache]: Analyzing trace with hash 990578203, now seen corresponding path program 152 times [2021-06-05 05:39:36,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:36,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94536952] [2021-06-05 05:39:36,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:36,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:36,862 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:39:36,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:36,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94536952] [2021-06-05 05:39:36,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94536952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:36,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313586717] [2021-06-05 05:39:36,862 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:36,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:39:36,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:36,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 05:39:36,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:36,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:39:36,951 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:39:36,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:39:36,954 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 05:39:36,954 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:10 [2021-06-05 05:39:36,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:39:36,992 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 13 treesize of output 7 [2021-06-05 05:39:36,992 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:39:36,996 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:39:36,996 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 05:39:36,996 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:3 [2021-06-05 05:39:37,025 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:39:37,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313586717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:37,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:37,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 05:39:37,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501859294] [2021-06-05 05:39:37,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:39:37,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:37,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:39:37,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:39:37,026 INFO L87 Difference]: Start difference. First operand 22913 states and 70806 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 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 05:39:37,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:37,751 INFO L93 Difference]: Finished difference Result 45655 states and 139694 transitions. [2021-06-05 05:39:37,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:39:37,751 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 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 45 [2021-06-05 05:39:37,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:37,820 INFO L225 Difference]: With dead ends: 45655 [2021-06-05 05:39:37,821 INFO L226 Difference]: Without dead ends: 45655 [2021-06-05 05:39:37,821 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 404.2ms TimeCoverageRelationStatistics Valid=276, Invalid=1364, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:39:37,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45655 states. [2021-06-05 05:39:38,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45655 to 23273. [2021-06-05 05:39:38,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23273 states, 23272 states have (on average 3.08903403231351) internal successors, (71888), 23272 states have internal predecessors, (71888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:38,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23273 states to 23273 states and 71888 transitions. [2021-06-05 05:39:38,372 INFO L78 Accepts]: Start accepts. Automaton has 23273 states and 71888 transitions. Word has length 45 [2021-06-05 05:39:38,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:38,372 INFO L482 AbstractCegarLoop]: Abstraction has 23273 states and 71888 transitions. [2021-06-05 05:39:38,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 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 05:39:38,372 INFO L276 IsEmpty]: Start isEmpty. Operand 23273 states and 71888 transitions. [2021-06-05 05:39:38,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 05:39:38,397 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:38,397 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 05:39:38,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-06-05 05:39:38,598 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:38,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:38,598 INFO L82 PathProgramCache]: Analyzing trace with hash 2073054145, now seen corresponding path program 153 times [2021-06-05 05:39:38,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:38,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060158050] [2021-06-05 05:39:38,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:38,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:38,680 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:39:38,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:38,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060158050] [2021-06-05 05:39:38,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060158050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:38,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561628607] [2021-06-05 05:39:38,681 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:38,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:39:38,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:38,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 05:39:38,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:38,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:39:38,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:39:38,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:39:38,771 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 05:39:38,771 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:14 [2021-06-05 05:39:38,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:39:38,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:39:38,826 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:39:38,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:39:38,829 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 05:39:38,830 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:17, output treesize:3 [2021-06-05 05:39:38,860 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:39:38,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561628607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:38,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:38,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 05:39:38,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609069419] [2021-06-05 05:39:38,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:39:38,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:38,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:39:38,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:39:38,861 INFO L87 Difference]: Start difference. First operand 23273 states and 71888 transitions. Second operand has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 17 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 05:39:40,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:40,278 INFO L93 Difference]: Finished difference Result 52888 states and 162151 transitions. [2021-06-05 05:39:40,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 05:39:40,279 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 17 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 45 [2021-06-05 05:39:40,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:40,369 INFO L225 Difference]: With dead ends: 52888 [2021-06-05 05:39:40,369 INFO L226 Difference]: Without dead ends: 52888 [2021-06-05 05:39:40,370 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1117 ImplicationChecksByTransitivity, 775.8ms TimeCoverageRelationStatistics Valid=612, Invalid=3810, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 05:39:40,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52888 states. [2021-06-05 05:39:40,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52888 to 28583. [2021-06-05 05:39:40,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28583 states, 28582 states have (on average 3.1288923098453574) internal successors, (89430), 28582 states have internal predecessors, (89430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:41,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28583 states to 28583 states and 89430 transitions. [2021-06-05 05:39:41,043 INFO L78 Accepts]: Start accepts. Automaton has 28583 states and 89430 transitions. Word has length 45 [2021-06-05 05:39:41,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:41,044 INFO L482 AbstractCegarLoop]: Abstraction has 28583 states and 89430 transitions. [2021-06-05 05:39:41,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 17 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 05:39:41,044 INFO L276 IsEmpty]: Start isEmpty. Operand 28583 states and 89430 transitions. [2021-06-05 05:39:41,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 05:39:41,073 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:41,073 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 05:39:41,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:41,274 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:41,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:41,274 INFO L82 PathProgramCache]: Analyzing trace with hash -568576037, now seen corresponding path program 154 times [2021-06-05 05:39:41,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:41,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056667716] [2021-06-05 05:39:41,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:41,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:41,360 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:39:41,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:41,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056667716] [2021-06-05 05:39:41,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056667716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:41,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760300962] [2021-06-05 05:39:41,360 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:41,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:39:41,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:41,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 05:39:41,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:41,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:39:41,441 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:39:41,444 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:39:41,445 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 05:39:41,445 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:14 [2021-06-05 05:39:41,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:39:41,524 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 13 treesize of output 7 [2021-06-05 05:39:41,525 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:39:41,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:39:41,529 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 05:39:41,529 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:3 [2021-06-05 05:39:41,579 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:39:41,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760300962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:41,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:41,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 05:39:41,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445013761] [2021-06-05 05:39:41,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:39:41,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:41,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:39:41,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:39:41,580 INFO L87 Difference]: Start difference. First operand 28583 states and 89430 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 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 05:39:42,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:42,132 INFO L93 Difference]: Finished difference Result 42516 states and 131719 transitions. [2021-06-05 05:39:42,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:39:42,132 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 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 45 [2021-06-05 05:39:42,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:42,204 INFO L225 Difference]: With dead ends: 42516 [2021-06-05 05:39:42,204 INFO L226 Difference]: Without dead ends: 42516 [2021-06-05 05:39:42,205 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 280.6ms TimeCoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:39:42,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42516 states. [2021-06-05 05:39:42,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42516 to 29181. [2021-06-05 05:39:42,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29181 states, 29180 states have (on average 3.1281014393420152) internal successors, (91278), 29180 states have internal predecessors, (91278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:42,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29181 states to 29181 states and 91278 transitions. [2021-06-05 05:39:42,731 INFO L78 Accepts]: Start accepts. Automaton has 29181 states and 91278 transitions. Word has length 45 [2021-06-05 05:39:42,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:42,731 INFO L482 AbstractCegarLoop]: Abstraction has 29181 states and 91278 transitions. [2021-06-05 05:39:42,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 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 05:39:42,731 INFO L276 IsEmpty]: Start isEmpty. Operand 29181 states and 91278 transitions. [2021-06-05 05:39:42,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 05:39:42,756 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:42,756 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 05:39:42,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2021-06-05 05:39:42,957 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:42,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:42,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1260994688, now seen corresponding path program 155 times [2021-06-05 05:39:42,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:42,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535862274] [2021-06-05 05:39:42,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:42,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:43,503 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:43,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:43,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535862274] [2021-06-05 05:39:43,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535862274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:43,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373306579] [2021-06-05 05:39:43,503 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:43,534 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:39:43,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:43,535 WARN L261 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 67 conjunts are in the unsatisfiable core [2021-06-05 05:39:43,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:44,456 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-06-05 05:39:44,522 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:39:44,522 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 64 treesize of output 36 [2021-06-05 05:39:44,523 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:39:44,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:39:44,533 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 05:39:44,533 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:85, output treesize:44 [2021-06-05 05:39:44,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:39:44,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:39:44,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:39:44,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:39:44,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:39:44,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:39:44,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:39:44,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:39:44,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:39:44,640 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 42 treesize of output 22 [2021-06-05 05:39:44,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:39:44,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:39:44,648 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 05:39:44,648 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:17 [2021-06-05 05:39:44,760 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:44,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373306579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:44,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:44,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 24] total 51 [2021-06-05 05:39:44,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580213773] [2021-06-05 05:39:44,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-06-05 05:39:44,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:44,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-06-05 05:39:44,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=2444, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 05:39:44,761 INFO L87 Difference]: Start difference. First operand 29181 states and 91278 transitions. Second operand has 52 states, 52 states have (on average 1.8653846153846154) internal successors, (97), 51 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:50,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:50,169 INFO L93 Difference]: Finished difference Result 38093 states and 116808 transitions. [2021-06-05 05:39:50,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-05 05:39:50,169 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.8653846153846154) internal successors, (97), 51 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 05:39:50,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:50,229 INFO L225 Difference]: With dead ends: 38093 [2021-06-05 05:39:50,230 INFO L226 Difference]: Without dead ends: 37939 [2021-06-05 05:39:50,230 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4218 ImplicationChecksByTransitivity, 4305.0ms TimeCoverageRelationStatistics Valid=1187, Invalid=13093, Unknown=0, NotChecked=0, Total=14280 [2021-06-05 05:39:50,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37939 states. [2021-06-05 05:39:50,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37939 to 30032. [2021-06-05 05:39:50,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30032 states, 30031 states have (on average 3.11737870866771) internal successors, (93618), 30031 states have internal predecessors, (93618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:50,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30032 states to 30032 states and 93618 transitions. [2021-06-05 05:39:50,720 INFO L78 Accepts]: Start accepts. Automaton has 30032 states and 93618 transitions. Word has length 49 [2021-06-05 05:39:50,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:50,720 INFO L482 AbstractCegarLoop]: Abstraction has 30032 states and 93618 transitions. [2021-06-05 05:39:50,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 1.8653846153846154) internal successors, (97), 51 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:50,721 INFO L276 IsEmpty]: Start isEmpty. Operand 30032 states and 93618 transitions. [2021-06-05 05:39:50,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 05:39:50,747 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:50,747 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 05:39:50,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:50,947 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:50,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:50,947 INFO L82 PathProgramCache]: Analyzing trace with hash 253154590, now seen corresponding path program 156 times [2021-06-05 05:39:50,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:50,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660194253] [2021-06-05 05:39:50,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:50,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:51,492 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:51,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:51,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660194253] [2021-06-05 05:39:51,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660194253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:51,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077238844] [2021-06-05 05:39:51,493 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:51,521 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:39:51,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:51,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 63 conjunts are in the unsatisfiable core [2021-06-05 05:39:51,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:52,331 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:39:52,331 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 52 treesize of output 32 [2021-06-05 05:39:52,332 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:39:52,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:39:52,341 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 05:39:52,341 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:89, output treesize:57 [2021-06-05 05:39:52,446 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:39:52,446 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 63 treesize of output 31 [2021-06-05 05:39:52,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:39:52,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:39:52,453 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 05:39:52,453 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:20 [2021-06-05 05:39:52,578 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:52,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077238844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:52,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:52,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 22] total 48 [2021-06-05 05:39:52,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239166312] [2021-06-05 05:39:52,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-06-05 05:39:52,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:52,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-06-05 05:39:52,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2190, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:39:52,579 INFO L87 Difference]: Start difference. First operand 30032 states and 93618 transitions. Second operand has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 48 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:57,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:57,519 INFO L93 Difference]: Finished difference Result 38512 states and 118020 transitions. [2021-06-05 05:39:57,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 05:39:57,519 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 48 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 05:39:57,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:57,576 INFO L225 Difference]: With dead ends: 38512 [2021-06-05 05:39:57,577 INFO L226 Difference]: Without dead ends: 38358 [2021-06-05 05:39:57,577 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2833 ImplicationChecksByTransitivity, 3995.7ms TimeCoverageRelationStatistics Valid=880, Invalid=10250, Unknown=0, NotChecked=0, Total=11130 [2021-06-05 05:39:57,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38358 states. [2021-06-05 05:39:57,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38358 to 30098. [2021-06-05 05:39:58,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30098 states, 30097 states have (on average 3.1170880818686246) internal successors, (93815), 30097 states have internal predecessors, (93815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:58,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30098 states to 30098 states and 93815 transitions. [2021-06-05 05:39:58,082 INFO L78 Accepts]: Start accepts. Automaton has 30098 states and 93815 transitions. Word has length 49 [2021-06-05 05:39:58,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:58,082 INFO L482 AbstractCegarLoop]: Abstraction has 30098 states and 93815 transitions. [2021-06-05 05:39:58,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 48 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:58,082 INFO L276 IsEmpty]: Start isEmpty. Operand 30098 states and 93815 transitions. [2021-06-05 05:39:58,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 05:39:58,109 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:58,109 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 05:39:58,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:58,309 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:58,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:58,310 INFO L82 PathProgramCache]: Analyzing trace with hash -175606438, now seen corresponding path program 157 times [2021-06-05 05:39:58,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:58,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411204487] [2021-06-05 05:39:58,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:58,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:58,901 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:58,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:58,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411204487] [2021-06-05 05:39:58,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411204487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:58,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819718891] [2021-06-05 05:39:58,901 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:58,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:58,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 59 conjunts are in the unsatisfiable core [2021-06-05 05:39:58,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:59,659 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:39:59,659 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 27 [2021-06-05 05:39:59,660 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:39:59,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:39:59,670 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 05:39:59,670 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:85, output treesize:48 [2021-06-05 05:39:59,984 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:39:59,984 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 54 treesize of output 26 [2021-06-05 05:39:59,985 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:39:59,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:39:59,991 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 05:39:59,991 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:63, output treesize:20 [2021-06-05 05:40:00,238 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:00,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819718891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:00,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:40:00,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 26] total 54 [2021-06-05 05:40:00,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153519150] [2021-06-05 05:40:00,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-06-05 05:40:00,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:40:00,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-06-05 05:40:00,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=2828, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 05:40:00,239 INFO L87 Difference]: Start difference. First operand 30098 states and 93815 transitions. Second operand has 55 states, 55 states have (on average 1.7636363636363637) internal successors, (97), 54 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:07,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:40:07,506 INFO L93 Difference]: Finished difference Result 40431 states and 123594 transitions. [2021-06-05 05:40:07,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 05:40:07,506 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.7636363636363637) internal successors, (97), 54 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 05:40:07,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:40:07,573 INFO L225 Difference]: With dead ends: 40431 [2021-06-05 05:40:07,573 INFO L226 Difference]: Without dead ends: 40212 [2021-06-05 05:40:07,574 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3736 ImplicationChecksByTransitivity, 5378.6ms TimeCoverageRelationStatistics Valid=1040, Invalid=14212, Unknown=0, NotChecked=0, Total=15252 [2021-06-05 05:40:07,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40212 states. [2021-06-05 05:40:08,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40212 to 30553. [2021-06-05 05:40:08,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30553 states, 30552 states have (on average 3.1129549620319454) internal successors, (95107), 30552 states have internal predecessors, (95107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:08,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30553 states to 30553 states and 95107 transitions. [2021-06-05 05:40:08,176 INFO L78 Accepts]: Start accepts. Automaton has 30553 states and 95107 transitions. Word has length 49 [2021-06-05 05:40:08,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:40:08,176 INFO L482 AbstractCegarLoop]: Abstraction has 30553 states and 95107 transitions. [2021-06-05 05:40:08,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 1.7636363636363637) internal successors, (97), 54 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:08,176 INFO L276 IsEmpty]: Start isEmpty. Operand 30553 states and 95107 transitions. [2021-06-05 05:40:08,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 05:40:08,208 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:40:08,208 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 05:40:08,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:08,421 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:40:08,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:40:08,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1520699802, now seen corresponding path program 158 times [2021-06-05 05:40:08,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:40:08,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300366631] [2021-06-05 05:40:08,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:40:08,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:09,071 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:09,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:40:09,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300366631] [2021-06-05 05:40:09,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300366631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:09,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360228253] [2021-06-05 05:40:09,071 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:09,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:40:09,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:40:09,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 63 conjunts are in the unsatisfiable core [2021-06-05 05:40:09,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:40:09,777 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:40:09,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 28 [2021-06-05 05:40:09,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:40:09,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:40:09,787 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 05:40:09,787 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:43 [2021-06-05 05:40:09,932 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:40:09,932 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 56 treesize of output 28 [2021-06-05 05:40:09,933 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:40:09,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:40:09,938 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 05:40:09,938 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:17 [2021-06-05 05:40:10,179 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:10,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360228253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:10,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:40:10,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 22] total 48 [2021-06-05 05:40:10,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681285335] [2021-06-05 05:40:10,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-06-05 05:40:10,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:40:10,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-06-05 05:40:10,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=2234, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:40:10,181 INFO L87 Difference]: Start difference. First operand 30553 states and 95107 transitions. Second operand has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 48 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:12,029 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2021-06-05 05:40:14,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:40:14,193 INFO L93 Difference]: Finished difference Result 31964 states and 99056 transitions. [2021-06-05 05:40:14,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 05:40:14,194 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 48 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 05:40:14,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:40:14,248 INFO L225 Difference]: With dead ends: 31964 [2021-06-05 05:40:14,248 INFO L226 Difference]: Without dead ends: 31798 [2021-06-05 05:40:14,249 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1091 ImplicationChecksByTransitivity, 2825.5ms TimeCoverageRelationStatistics Valid=302, Invalid=5550, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 05:40:14,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31798 states. [2021-06-05 05:40:14,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31798 to 30683. [2021-06-05 05:40:14,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30683 states, 30682 states have (on average 3.1108793429372272) internal successors, (95448), 30682 states have internal predecessors, (95448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:14,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30683 states to 30683 states and 95448 transitions. [2021-06-05 05:40:14,728 INFO L78 Accepts]: Start accepts. Automaton has 30683 states and 95448 transitions. Word has length 49 [2021-06-05 05:40:14,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:40:14,728 INFO L482 AbstractCegarLoop]: Abstraction has 30683 states and 95448 transitions. [2021-06-05 05:40:14,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 48 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:14,728 INFO L276 IsEmpty]: Start isEmpty. Operand 30683 states and 95448 transitions. [2021-06-05 05:40:14,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 05:40:14,756 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:40:14,756 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 05:40:14,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2021-06-05 05:40:14,969 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:40:14,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:40:14,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1919970444, now seen corresponding path program 159 times [2021-06-05 05:40:14,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:40:14,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23176053] [2021-06-05 05:40:14,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:40:14,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:15,572 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:15,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:40:15,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23176053] [2021-06-05 05:40:15,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23176053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:15,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450164974] [2021-06-05 05:40:15,573 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:15,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:40:15,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:40:15,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 63 conjunts are in the unsatisfiable core [2021-06-05 05:40:15,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:40:16,182 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:40:16,183 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 48 treesize of output 28 [2021-06-05 05:40:16,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:40:16,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:40:16,196 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 05:40:16,196 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:43 [2021-06-05 05:40:16,465 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:40:16,466 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 48 treesize of output 24 [2021-06-05 05:40:16,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:40:16,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:40:16,472 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 05:40:16,473 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:20 [2021-06-05 05:40:16,882 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:16,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450164974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:16,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:40:16,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 24] total 52 [2021-06-05 05:40:16,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939606554] [2021-06-05 05:40:16,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-06-05 05:40:16,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:40:16,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-06-05 05:40:16,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=2605, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 05:40:16,883 INFO L87 Difference]: Start difference. First operand 30683 states and 95448 transitions. Second operand has 53 states, 53 states have (on average 1.830188679245283) internal successors, (97), 52 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:23,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:40:23,013 INFO L93 Difference]: Finished difference Result 40926 states and 125101 transitions. [2021-06-05 05:40:23,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-06-05 05:40:23,014 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.830188679245283) internal successors, (97), 52 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 05:40:23,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:40:23,071 INFO L225 Difference]: With dead ends: 40926 [2021-06-05 05:40:23,071 INFO L226 Difference]: Without dead ends: 40707 [2021-06-05 05:40:23,072 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4069 ImplicationChecksByTransitivity, 4928.2ms TimeCoverageRelationStatistics Valid=1009, Invalid=13997, Unknown=0, NotChecked=0, Total=15006 [2021-06-05 05:40:23,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40707 states. [2021-06-05 05:40:23,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40707 to 30659. [2021-06-05 05:40:23,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30659 states, 30658 states have (on average 3.1109987605192773) internal successors, (95377), 30658 states have internal predecessors, (95377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:23,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30659 states to 30659 states and 95377 transitions. [2021-06-05 05:40:23,599 INFO L78 Accepts]: Start accepts. Automaton has 30659 states and 95377 transitions. Word has length 49 [2021-06-05 05:40:23,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:40:23,599 INFO L482 AbstractCegarLoop]: Abstraction has 30659 states and 95377 transitions. [2021-06-05 05:40:23,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 1.830188679245283) internal successors, (97), 52 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:23,599 INFO L276 IsEmpty]: Start isEmpty. Operand 30659 states and 95377 transitions. [2021-06-05 05:40:23,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 05:40:23,628 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:40:23,628 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 05:40:23,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-06-05 05:40:23,841 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:40:23,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:40:23,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1339815556, now seen corresponding path program 160 times [2021-06-05 05:40:23,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:40:23,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452768358] [2021-06-05 05:40:23,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:40:23,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:24,407 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:24,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:40:24,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452768358] [2021-06-05 05:40:24,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452768358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:24,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748022317] [2021-06-05 05:40:24,408 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:24,437 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:40:24,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:40:24,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 59 conjunts are in the unsatisfiable core [2021-06-05 05:40:24,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:40:25,213 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:40:25,213 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 27 [2021-06-05 05:40:25,214 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:40:25,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:40:25,226 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 05:40:25,226 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:85, output treesize:48 [2021-06-05 05:40:25,552 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:40:25,552 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 54 treesize of output 26 [2021-06-05 05:40:25,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:40:25,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:40:25,560 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 05:40:25,560 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:63, output treesize:20 [2021-06-05 05:40:25,811 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:25,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748022317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:25,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:40:25,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 26] total 54 [2021-06-05 05:40:25,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144707924] [2021-06-05 05:40:25,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-06-05 05:40:25,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:40:25,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-06-05 05:40:25,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=2828, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 05:40:25,812 INFO L87 Difference]: Start difference. First operand 30659 states and 95377 transitions. Second operand has 55 states, 55 states have (on average 1.7636363636363637) internal successors, (97), 54 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:33,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:40:33,279 INFO L93 Difference]: Finished difference Result 41025 states and 125405 transitions. [2021-06-05 05:40:33,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-06-05 05:40:33,279 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.7636363636363637) internal successors, (97), 54 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 05:40:33,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:40:33,336 INFO L225 Difference]: With dead ends: 41025 [2021-06-05 05:40:33,336 INFO L226 Difference]: Without dead ends: 40806 [2021-06-05 05:40:33,337 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3861 ImplicationChecksByTransitivity, 5278.1ms TimeCoverageRelationStatistics Valid=937, Invalid=14563, Unknown=0, NotChecked=0, Total=15500 [2021-06-05 05:40:33,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40806 states. [2021-06-05 05:40:33,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40806 to 30588. [2021-06-05 05:40:33,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30588 states, 30587 states have (on average 3.111419884264557) internal successors, (95169), 30587 states have internal predecessors, (95169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:33,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30588 states to 30588 states and 95169 transitions. [2021-06-05 05:40:33,843 INFO L78 Accepts]: Start accepts. Automaton has 30588 states and 95169 transitions. Word has length 49 [2021-06-05 05:40:33,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:40:33,843 INFO L482 AbstractCegarLoop]: Abstraction has 30588 states and 95169 transitions. [2021-06-05 05:40:33,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 1.7636363636363637) internal successors, (97), 54 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:33,843 INFO L276 IsEmpty]: Start isEmpty. Operand 30588 states and 95169 transitions. [2021-06-05 05:40:33,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 05:40:33,870 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:40:33,870 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 05:40:34,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-06-05 05:40:34,071 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:40:34,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:40:34,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1177810326, now seen corresponding path program 161 times [2021-06-05 05:40:34,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:40:34,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781366841] [2021-06-05 05:40:34,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:40:34,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:34,700 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:34,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:40:34,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781366841] [2021-06-05 05:40:34,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781366841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:34,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462795192] [2021-06-05 05:40:34,701 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:34,731 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:40:34,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:40:34,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 64 conjunts are in the unsatisfiable core [2021-06-05 05:40:34,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:40:35,286 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:40:35,287 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 48 treesize of output 28 [2021-06-05 05:40:35,288 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:40:35,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:40:35,297 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 05:40:35,297 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:43 [2021-06-05 05:40:35,510 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:40:35,510 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 41 treesize of output 21 [2021-06-05 05:40:35,511 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:40:35,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:40:35,515 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 05:40:35,516 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:17 [2021-06-05 05:40:35,707 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:35,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462795192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:35,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:40:35,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 22] total 50 [2021-06-05 05:40:35,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491626459] [2021-06-05 05:40:35,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-06-05 05:40:35,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:40:35,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-06-05 05:40:35,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=2365, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 05:40:35,708 INFO L87 Difference]: Start difference. First operand 30588 states and 95169 transitions. Second operand has 51 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 50 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:40,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:40:40,693 INFO L93 Difference]: Finished difference Result 41262 states and 126100 transitions. [2021-06-05 05:40:40,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 05:40:40,693 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 50 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 05:40:40,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:40:40,756 INFO L225 Difference]: With dead ends: 41262 [2021-06-05 05:40:40,756 INFO L226 Difference]: Without dead ends: 41043 [2021-06-05 05:40:40,757 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3035 ImplicationChecksByTransitivity, 3550.5ms TimeCoverageRelationStatistics Valid=788, Invalid=10132, Unknown=0, NotChecked=0, Total=10920 [2021-06-05 05:40:40,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41043 states. [2021-06-05 05:40:41,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41043 to 30615. [2021-06-05 05:40:41,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30615 states, 30614 states have (on average 3.1114849415300188) internal successors, (95255), 30614 states have internal predecessors, (95255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:41,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30615 states to 30615 states and 95255 transitions. [2021-06-05 05:40:41,270 INFO L78 Accepts]: Start accepts. Automaton has 30615 states and 95255 transitions. Word has length 49 [2021-06-05 05:40:41,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:40:41,270 INFO L482 AbstractCegarLoop]: Abstraction has 30615 states and 95255 transitions. [2021-06-05 05:40:41,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 50 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:41,271 INFO L276 IsEmpty]: Start isEmpty. Operand 30615 states and 95255 transitions. [2021-06-05 05:40:41,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 05:40:41,300 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:40:41,300 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 05:40:41,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:41,500 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:40:41,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:40:41,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1420850730, now seen corresponding path program 162 times [2021-06-05 05:40:41,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:40:41,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711036616] [2021-06-05 05:40:41,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:40:41,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:42,075 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:42,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:40:42,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711036616] [2021-06-05 05:40:42,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711036616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:42,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694250453] [2021-06-05 05:40:42,076 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:42,104 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:40:42,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:40:42,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 63 conjunts are in the unsatisfiable core [2021-06-05 05:40:42,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:40:42,936 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:40:42,936 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 48 treesize of output 28 [2021-06-05 05:40:42,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:40:42,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:40:42,946 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 05:40:42,947 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:82, output treesize:50 [2021-06-05 05:40:43,094 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:40:43,094 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 27 [2021-06-05 05:40:43,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:40:43,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:40:43,101 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 05:40:43,101 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:20 [2021-06-05 05:40:43,229 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:43,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694250453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:43,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:40:43,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 22] total 48 [2021-06-05 05:40:43,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553512043] [2021-06-05 05:40:43,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-06-05 05:40:43,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:40:43,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-06-05 05:40:43,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2215, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:40:43,230 INFO L87 Difference]: Start difference. First operand 30615 states and 95255 transitions. Second operand has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 48 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:45,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:40:45,142 INFO L93 Difference]: Finished difference Result 31062 states and 96409 transitions. [2021-06-05 05:40:45,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:40:45,142 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 48 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 05:40:45,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:40:45,192 INFO L225 Difference]: With dead ends: 31062 [2021-06-05 05:40:45,192 INFO L226 Difference]: Without dead ends: 30998 [2021-06-05 05:40:45,193 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 928 ImplicationChecksByTransitivity, 2211.5ms TimeCoverageRelationStatistics Valid=247, Invalid=4175, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 05:40:45,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30998 states. [2021-06-05 05:40:45,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30998 to 30615. [2021-06-05 05:40:45,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30615 states, 30614 states have (on average 3.1114849415300188) internal successors, (95255), 30614 states have internal predecessors, (95255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:45,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30615 states to 30615 states and 95255 transitions. [2021-06-05 05:40:45,658 INFO L78 Accepts]: Start accepts. Automaton has 30615 states and 95255 transitions. Word has length 49 [2021-06-05 05:40:45,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:40:45,658 INFO L482 AbstractCegarLoop]: Abstraction has 30615 states and 95255 transitions. [2021-06-05 05:40:45,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 48 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:45,658 INFO L276 IsEmpty]: Start isEmpty. Operand 30615 states and 95255 transitions. [2021-06-05 05:40:45,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 05:40:45,687 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:40:45,687 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 05:40:45,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:45,887 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:40:45,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:40:45,887 INFO L82 PathProgramCache]: Analyzing trace with hash 660848806, now seen corresponding path program 163 times [2021-06-05 05:40:45,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:40:45,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095111088] [2021-06-05 05:40:45,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:40:45,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:46,468 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:46,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:40:46,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095111088] [2021-06-05 05:40:46,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095111088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:46,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592525358] [2021-06-05 05:40:46,469 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:46,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:46,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 59 conjunts are in the unsatisfiable core [2021-06-05 05:40:46,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:40:47,562 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:40:47,563 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 27 [2021-06-05 05:40:47,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:40:47,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:40:47,573 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 05:40:47,573 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:54 [2021-06-05 05:40:47,694 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:40:47,695 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 54 treesize of output 26 [2021-06-05 05:40:47,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:40:47,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:40:47,701 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 05:40:47,701 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:63, output treesize:20 [2021-06-05 05:40:47,958 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:47,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592525358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:47,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:40:47,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26] total 53 [2021-06-05 05:40:47,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917543354] [2021-06-05 05:40:47,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-06-05 05:40:47,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:40:47,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-06-05 05:40:47,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2722, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 05:40:47,959 INFO L87 Difference]: Start difference. First operand 30615 states and 95255 transitions. Second operand has 54 states, 54 states have (on average 1.7962962962962963) internal successors, (97), 53 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:52,094 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 43 [2021-06-05 05:40:55,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:40:55,246 INFO L93 Difference]: Finished difference Result 39956 states and 122260 transitions. [2021-06-05 05:40:55,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-05 05:40:55,246 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.7962962962962963) internal successors, (97), 53 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 05:40:55,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:40:55,307 INFO L225 Difference]: With dead ends: 39956 [2021-06-05 05:40:55,307 INFO L226 Difference]: Without dead ends: 39737 [2021-06-05 05:40:55,308 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2795 ImplicationChecksByTransitivity, 5240.1ms TimeCoverageRelationStatistics Valid=905, Invalid=11977, Unknown=0, NotChecked=0, Total=12882 [2021-06-05 05:40:55,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39737 states. [2021-06-05 05:40:55,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39737 to 30942. [2021-06-05 05:40:55,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30942 states, 30941 states have (on average 3.1104036715038297) internal successors, (96239), 30941 states have internal predecessors, (96239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:55,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30942 states to 30942 states and 96239 transitions. [2021-06-05 05:40:55,840 INFO L78 Accepts]: Start accepts. Automaton has 30942 states and 96239 transitions. Word has length 49 [2021-06-05 05:40:55,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:40:55,840 INFO L482 AbstractCegarLoop]: Abstraction has 30942 states and 96239 transitions. [2021-06-05 05:40:55,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 1.7962962962962963) internal successors, (97), 53 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:40:55,840 INFO L276 IsEmpty]: Start isEmpty. Operand 30942 states and 96239 transitions. [2021-06-05 05:40:55,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 05:40:55,870 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:40:55,870 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 05:40:56,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:56,071 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:40:56,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:40:56,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1937812250, now seen corresponding path program 164 times [2021-06-05 05:40:56,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:40:56,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345256883] [2021-06-05 05:40:56,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:40:56,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:56,605 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:56,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:40:56,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345256883] [2021-06-05 05:40:56,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345256883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:56,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204336716] [2021-06-05 05:40:56,605 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:56,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:40:56,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:40:56,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 63 conjunts are in the unsatisfiable core [2021-06-05 05:40:56,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:40:57,335 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:40:57,335 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 31 [2021-06-05 05:40:57,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:40:57,343 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:40:57,343 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 05:40:57,343 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:73, output treesize:40 [2021-06-05 05:40:57,435 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:40:57,436 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 41 treesize of output 21 [2021-06-05 05:40:57,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:40:57,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:40:57,441 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 05:40:57,441 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:17 [2021-06-05 05:40:57,659 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:57,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204336716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:57,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:40:57,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 22] total 47 [2021-06-05 05:40:57,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126249759] [2021-06-05 05:40:57,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-06-05 05:40:57,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:40:57,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-06-05 05:40:57,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=2139, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:40:57,661 INFO L87 Difference]: Start difference. First operand 30942 states and 96239 transitions. Second operand has 48 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 47 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:01,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:41:01,746 INFO L93 Difference]: Finished difference Result 32263 states and 99913 transitions. [2021-06-05 05:41:01,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 05:41:01,747 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 47 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 05:41:01,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:41:01,803 INFO L225 Difference]: With dead ends: 32263 [2021-06-05 05:41:01,803 INFO L226 Difference]: Without dead ends: 32112 [2021-06-05 05:41:01,803 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 2644.5ms TimeCoverageRelationStatistics Valid=311, Invalid=5541, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 05:41:01,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32112 states. [2021-06-05 05:41:02,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32112 to 31041. [2021-06-05 05:41:02,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31041 states, 31040 states have (on average 3.1089884020618554) internal successors, (96503), 31040 states have internal predecessors, (96503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:02,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31041 states to 31041 states and 96503 transitions. [2021-06-05 05:41:02,242 INFO L78 Accepts]: Start accepts. Automaton has 31041 states and 96503 transitions. Word has length 49 [2021-06-05 05:41:02,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:41:02,242 INFO L482 AbstractCegarLoop]: Abstraction has 31041 states and 96503 transitions. [2021-06-05 05:41:02,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 47 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:02,242 INFO L276 IsEmpty]: Start isEmpty. Operand 31041 states and 96503 transitions. [2021-06-05 05:41:02,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 05:41:02,269 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:41:02,269 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 05:41:02,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2021-06-05 05:41:02,470 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:41:02,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:41:02,470 INFO L82 PathProgramCache]: Analyzing trace with hash 232087778, now seen corresponding path program 165 times [2021-06-05 05:41:02,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:41:02,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634841924] [2021-06-05 05:41:02,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:41:02,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:03,028 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:03,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:41:03,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634841924] [2021-06-05 05:41:03,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634841924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:03,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128945712] [2021-06-05 05:41:03,028 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:03,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:41:03,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:41:03,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 63 conjunts are in the unsatisfiable core [2021-06-05 05:41:03,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:41:03,644 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:41:03,644 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 48 treesize of output 28 [2021-06-05 05:41:03,645 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:41:03,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:41:03,654 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 05:41:03,654 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:43 [2021-06-05 05:41:03,922 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:41:03,922 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 27 [2021-06-05 05:41:03,923 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:41:03,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:41:03,929 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 05:41:03,929 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:20 [2021-06-05 05:41:04,149 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:04,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128945712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:04,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:41:04,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 24] total 52 [2021-06-05 05:41:04,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546302554] [2021-06-05 05:41:04,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-06-05 05:41:04,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:41:04,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-06-05 05:41:04,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=2606, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 05:41:04,150 INFO L87 Difference]: Start difference. First operand 31041 states and 96503 transitions. Second operand has 53 states, 53 states have (on average 1.830188679245283) internal successors, (97), 52 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:10,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:41:10,690 INFO L93 Difference]: Finished difference Result 41561 states and 126826 transitions. [2021-06-05 05:41:10,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-06-05 05:41:10,690 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.830188679245283) internal successors, (97), 52 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 05:41:10,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:41:10,758 INFO L225 Difference]: With dead ends: 41561 [2021-06-05 05:41:10,758 INFO L226 Difference]: Without dead ends: 41342 [2021-06-05 05:41:10,759 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3788 ImplicationChecksByTransitivity, 4747.6ms TimeCoverageRelationStatistics Valid=1056, Invalid=13706, Unknown=0, NotChecked=0, Total=14762 [2021-06-05 05:41:10,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41342 states. [2021-06-05 05:41:11,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41342 to 31141. [2021-06-05 05:41:11,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31141 states, 31140 states have (on average 3.1085420680796405) internal successors, (96800), 31140 states have internal predecessors, (96800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:11,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31141 states to 31141 states and 96800 transitions. [2021-06-05 05:41:11,372 INFO L78 Accepts]: Start accepts. Automaton has 31141 states and 96800 transitions. Word has length 49 [2021-06-05 05:41:11,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:41:11,372 INFO L482 AbstractCegarLoop]: Abstraction has 31141 states and 96800 transitions. [2021-06-05 05:41:11,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 1.830188679245283) internal successors, (97), 52 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:11,372 INFO L276 IsEmpty]: Start isEmpty. Operand 31141 states and 96800 transitions. [2021-06-05 05:41:11,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 05:41:11,400 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:41:11,400 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 05:41:11,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2021-06-05 05:41:11,601 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:41:11,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:41:11,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1928394018, now seen corresponding path program 166 times [2021-06-05 05:41:11,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:41:11,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048576561] [2021-06-05 05:41:11,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:41:11,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:12,133 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:12,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:41:12,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048576561] [2021-06-05 05:41:12,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048576561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:12,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504942095] [2021-06-05 05:41:12,134 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:12,163 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:41:12,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:41:12,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 05:41:12,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:41:12,721 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:41:12,721 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 79 treesize of output 51 [2021-06-05 05:41:12,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:41:12,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:41:12,731 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 05:41:12,731 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:96, output treesize:55 [2021-06-05 05:41:13,000 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:41:13,000 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 49 treesize of output 25 [2021-06-05 05:41:13,001 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:41:13,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:41:13,008 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 05:41:13,008 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:20 [2021-06-05 05:41:13,271 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:13,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504942095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:13,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:41:13,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 24] total 50 [2021-06-05 05:41:13,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667878084] [2021-06-05 05:41:13,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-06-05 05:41:13,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:41:13,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-06-05 05:41:13,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=2435, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 05:41:13,272 INFO L87 Difference]: Start difference. First operand 31141 states and 96800 transitions. Second operand has 51 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 50 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:18,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:41:18,429 INFO L93 Difference]: Finished difference Result 32160 states and 99576 transitions. [2021-06-05 05:41:18,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 05:41:18,430 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 50 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 05:41:18,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:41:18,485 INFO L225 Difference]: With dead ends: 32160 [2021-06-05 05:41:18,485 INFO L226 Difference]: Without dead ends: 32023 [2021-06-05 05:41:18,486 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1118 ImplicationChecksByTransitivity, 3172.5ms TimeCoverageRelationStatistics Valid=328, Invalid=6644, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 05:41:18,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32023 states. [2021-06-05 05:41:18,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32023 to 31164. [2021-06-05 05:41:18,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31164 states, 31163 states have (on average 3.108365690081186) internal successors, (96866), 31163 states have internal predecessors, (96866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:18,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31164 states to 31164 states and 96866 transitions. [2021-06-05 05:41:18,935 INFO L78 Accepts]: Start accepts. Automaton has 31164 states and 96866 transitions. Word has length 49 [2021-06-05 05:41:18,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:41:18,935 INFO L482 AbstractCegarLoop]: Abstraction has 31164 states and 96866 transitions. [2021-06-05 05:41:18,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 50 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:18,935 INFO L276 IsEmpty]: Start isEmpty. Operand 31164 states and 96866 transitions. [2021-06-05 05:41:18,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 05:41:18,968 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:41:18,968 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 05:41:19,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable290 [2021-06-05 05:41:19,169 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:41:19,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:41:19,169 INFO L82 PathProgramCache]: Analyzing trace with hash 184030012, now seen corresponding path program 167 times [2021-06-05 05:41:19,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:41:19,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823852391] [2021-06-05 05:41:19,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:41:19,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:19,689 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:19,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:41:19,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823852391] [2021-06-05 05:41:19,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823852391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:19,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175781799] [2021-06-05 05:41:19,689 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:19,722 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:41:19,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:41:19,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 64 conjunts are in the unsatisfiable core [2021-06-05 05:41:19,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:41:20,304 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-06-05 05:41:20,556 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:41:20,557 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 65 treesize of output 41 [2021-06-05 05:41:20,558 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:41:20,567 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:41:20,568 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 05:41:20,568 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:89, output treesize:56 [2021-06-05 05:41:20,736 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:41:20,736 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 61 treesize of output 29 [2021-06-05 05:41:20,737 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:41:20,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:41:20,743 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 05:41:20,743 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:64, output treesize:20 [2021-06-05 05:41:20,991 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:20,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175781799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:20,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:41:20,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 24] total 50 [2021-06-05 05:41:20,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65595121] [2021-06-05 05:41:20,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-06-05 05:41:20,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:41:20,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-06-05 05:41:20,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=2430, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 05:41:20,992 INFO L87 Difference]: Start difference. First operand 31164 states and 96866 transitions. Second operand has 51 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 50 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:25,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:41:25,961 INFO L93 Difference]: Finished difference Result 32496 states and 100529 transitions. [2021-06-05 05:41:25,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 05:41:25,961 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 50 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 05:41:25,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:41:26,009 INFO L225 Difference]: With dead ends: 32496 [2021-06-05 05:41:26,009 INFO L226 Difference]: Without dead ends: 32345 [2021-06-05 05:41:26,009 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 3376.2ms TimeCoverageRelationStatistics Valid=344, Invalid=6796, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 05:41:26,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32345 states. [2021-06-05 05:41:26,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32345 to 31242. [2021-06-05 05:41:26,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31242 states, 31241 states have (on average 3.1072628917128133) internal successors, (97074), 31241 states have internal predecessors, (97074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:26,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31242 states to 31242 states and 97074 transitions. [2021-06-05 05:41:26,453 INFO L78 Accepts]: Start accepts. Automaton has 31242 states and 97074 transitions. Word has length 49 [2021-06-05 05:41:26,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:41:26,453 INFO L482 AbstractCegarLoop]: Abstraction has 31242 states and 97074 transitions. [2021-06-05 05:41:26,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 50 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:26,453 INFO L276 IsEmpty]: Start isEmpty. Operand 31242 states and 97074 transitions. [2021-06-05 05:41:26,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 05:41:26,485 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:41:26,485 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 05:41:26,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:26,686 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:41:26,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:41:26,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1585504542, now seen corresponding path program 168 times [2021-06-05 05:41:26,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:41:26,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676748964] [2021-06-05 05:41:26,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:41:26,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:27,248 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:27,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:41:27,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676748964] [2021-06-05 05:41:27,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676748964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:27,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173256363] [2021-06-05 05:41:27,249 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:27,279 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:41:27,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:41:27,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 63 conjunts are in the unsatisfiable core [2021-06-05 05:41:27,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:41:27,980 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:41:27,981 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 48 treesize of output 28 [2021-06-05 05:41:27,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:41:27,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:41:27,991 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 05:41:27,991 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:82, output treesize:50 [2021-06-05 05:41:28,153 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:41:28,153 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 27 [2021-06-05 05:41:28,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:41:28,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:41:28,160 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 05:41:28,160 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:20 [2021-06-05 05:41:28,292 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:28,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173256363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:28,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:41:28,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 22] total 50 [2021-06-05 05:41:28,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839228423] [2021-06-05 05:41:28,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-06-05 05:41:28,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:41:28,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-06-05 05:41:28,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=2387, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 05:41:28,293 INFO L87 Difference]: Start difference. First operand 31242 states and 97074 transitions. Second operand has 51 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 50 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:29,525 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 29 [2021-06-05 05:41:33,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:41:33,955 INFO L93 Difference]: Finished difference Result 41173 states and 125718 transitions. [2021-06-05 05:41:33,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 05:41:33,955 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 50 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 05:41:33,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:41:34,127 INFO L225 Difference]: With dead ends: 41173 [2021-06-05 05:41:34,127 INFO L226 Difference]: Without dead ends: 41012 [2021-06-05 05:41:34,128 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2902 ImplicationChecksByTransitivity, 4031.6ms TimeCoverageRelationStatistics Valid=796, Invalid=10976, Unknown=0, NotChecked=0, Total=11772 [2021-06-05 05:41:34,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41012 states. [2021-06-05 05:41:34,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41012 to 31230. [2021-06-05 05:41:34,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31230 states, 31229 states have (on average 3.10743219443466) internal successors, (97042), 31229 states have internal predecessors, (97042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:34,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31230 states to 31230 states and 97042 transitions. [2021-06-05 05:41:34,611 INFO L78 Accepts]: Start accepts. Automaton has 31230 states and 97042 transitions. Word has length 49 [2021-06-05 05:41:34,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:41:34,611 INFO L482 AbstractCegarLoop]: Abstraction has 31230 states and 97042 transitions. [2021-06-05 05:41:34,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 50 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:34,612 INFO L276 IsEmpty]: Start isEmpty. Operand 31230 states and 97042 transitions. [2021-06-05 05:41:34,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 05:41:34,644 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:41:34,644 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 05:41:34,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:34,845 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:41:34,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:41:34,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1972464768, now seen corresponding path program 169 times [2021-06-05 05:41:34,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:41:34,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444337972] [2021-06-05 05:41:34,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:41:34,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:35,380 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:35,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:41:35,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444337972] [2021-06-05 05:41:35,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444337972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:35,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105612438] [2021-06-05 05:41:35,381 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:35,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:35,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 59 conjunts are in the unsatisfiable core [2021-06-05 05:41:35,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:41:36,077 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:41:36,077 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 27 [2021-06-05 05:41:36,078 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:41:36,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:41:36,086 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 05:41:36,086 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:80, output treesize:43 [2021-06-05 05:41:36,455 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:41:36,455 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 54 treesize of output 26 [2021-06-05 05:41:36,456 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:41:36,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:41:36,462 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 05:41:36,462 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:63, output treesize:20 [2021-06-05 05:41:36,726 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:36,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105612438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:36,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:41:36,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 26] total 54 [2021-06-05 05:41:36,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311892881] [2021-06-05 05:41:36,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-06-05 05:41:36,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:41:36,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-06-05 05:41:36,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2829, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 05:41:36,728 INFO L87 Difference]: Start difference. First operand 31230 states and 97042 transitions. Second operand has 55 states, 55 states have (on average 1.7636363636363637) internal successors, (97), 54 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:43,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:41:43,293 INFO L93 Difference]: Finished difference Result 40170 states and 122842 transitions. [2021-06-05 05:41:43,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 05:41:43,293 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.7636363636363637) internal successors, (97), 54 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 05:41:43,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:41:43,355 INFO L225 Difference]: With dead ends: 40170 [2021-06-05 05:41:43,355 INFO L226 Difference]: Without dead ends: 39951 [2021-06-05 05:41:43,356 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3403 ImplicationChecksByTransitivity, 5080.0ms TimeCoverageRelationStatistics Valid=1002, Invalid=13518, Unknown=0, NotChecked=0, Total=14520 [2021-06-05 05:41:43,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39951 states. [2021-06-05 05:41:43,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39951 to 31384. [2021-06-05 05:41:43,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31384 states, 31383 states have (on average 3.1069050122677884) internal successors, (97504), 31383 states have internal predecessors, (97504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:43,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31384 states to 31384 states and 97504 transitions. [2021-06-05 05:41:43,880 INFO L78 Accepts]: Start accepts. Automaton has 31384 states and 97504 transitions. Word has length 49 [2021-06-05 05:41:43,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:41:43,880 INFO L482 AbstractCegarLoop]: Abstraction has 31384 states and 97504 transitions. [2021-06-05 05:41:43,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 1.7636363636363637) internal successors, (97), 54 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:43,881 INFO L276 IsEmpty]: Start isEmpty. Operand 31384 states and 97504 transitions. [2021-06-05 05:41:43,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 05:41:43,914 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:41:43,914 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 05:41:44,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:44,114 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:41:44,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:41:44,114 INFO L82 PathProgramCache]: Analyzing trace with hash -626196288, now seen corresponding path program 170 times [2021-06-05 05:41:44,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:41:44,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088918984] [2021-06-05 05:41:44,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:41:44,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:44,616 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:44,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:41:44,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088918984] [2021-06-05 05:41:44,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088918984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:44,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384157053] [2021-06-05 05:41:44,617 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:44,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:41:44,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:41:44,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 63 conjunts are in the unsatisfiable core [2021-06-05 05:41:44,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:41:45,125 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:41:45,126 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 71 treesize of output 43 [2021-06-05 05:41:45,127 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:41:45,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:41:45,134 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 05:41:45,134 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:83, output treesize:38 [2021-06-05 05:41:45,314 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:41:45,314 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 47 treesize of output 27 [2021-06-05 05:41:45,315 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:41:45,319 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:41:45,320 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 05:41:45,320 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:17 [2021-06-05 05:41:45,659 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:45,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384157053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:45,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:41:45,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 22] total 48 [2021-06-05 05:41:45,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911438436] [2021-06-05 05:41:45,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-06-05 05:41:45,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:41:45,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-06-05 05:41:45,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=2234, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:41:45,660 INFO L87 Difference]: Start difference. First operand 31384 states and 97504 transitions. Second operand has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 48 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:50,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:41:50,502 INFO L93 Difference]: Finished difference Result 32827 states and 101444 transitions. [2021-06-05 05:41:50,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 05:41:50,502 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 48 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 05:41:50,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:41:50,549 INFO L225 Difference]: With dead ends: 32827 [2021-06-05 05:41:50,549 INFO L226 Difference]: Without dead ends: 32640 [2021-06-05 05:41:50,549 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1407 ImplicationChecksByTransitivity, 3079.6ms TimeCoverageRelationStatistics Valid=411, Invalid=7071, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 05:41:50,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32640 states. [2021-06-05 05:41:50,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32640 to 31449. [2021-06-05 05:41:50,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31449 states, 31448 states have (on average 3.106366064614602) internal successors, (97689), 31448 states have internal predecessors, (97689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:50,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31449 states to 31449 states and 97689 transitions. [2021-06-05 05:41:50,973 INFO L78 Accepts]: Start accepts. Automaton has 31449 states and 97689 transitions. Word has length 49 [2021-06-05 05:41:50,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:41:50,973 INFO L482 AbstractCegarLoop]: Abstraction has 31449 states and 97689 transitions. [2021-06-05 05:41:50,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 48 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:50,974 INFO L276 IsEmpty]: Start isEmpty. Operand 31449 states and 97689 transitions. [2021-06-05 05:41:51,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 05:41:51,005 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:41:51,005 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 05:41:51,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2021-06-05 05:41:51,206 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:41:51,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:41:51,206 INFO L82 PathProgramCache]: Analyzing trace with hash 228100762, now seen corresponding path program 171 times [2021-06-05 05:41:51,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:41:51,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251173482] [2021-06-05 05:41:51,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:41:51,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:51,743 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:51,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:41:51,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251173482] [2021-06-05 05:41:51,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251173482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:51,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049826671] [2021-06-05 05:41:51,743 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:51,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:41:51,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:41:51,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 63 conjunts are in the unsatisfiable core [2021-06-05 05:41:51,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:41:52,551 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:41:52,552 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 48 treesize of output 28 [2021-06-05 05:41:52,553 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:41:52,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:41:52,564 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 05:41:52,564 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:77, output treesize:45 [2021-06-05 05:41:52,783 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:41:52,783 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 54 treesize of output 30 [2021-06-05 05:41:52,784 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:41:52,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:41:52,790 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 05:41:52,790 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-06-05 05:41:53,010 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:53,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049826671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:53,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:41:53,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 24] total 52 [2021-06-05 05:41:53,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453622413] [2021-06-05 05:41:53,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-06-05 05:41:53,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:41:53,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-06-05 05:41:53,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2595, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 05:41:53,012 INFO L87 Difference]: Start difference. First operand 31449 states and 97689 transitions. Second operand has 53 states, 53 states have (on average 1.830188679245283) internal successors, (97), 52 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:58,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:41:58,865 INFO L93 Difference]: Finished difference Result 40720 states and 124475 transitions. [2021-06-05 05:41:58,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 05:41:58,866 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.830188679245283) internal successors, (97), 52 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 05:41:58,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:41:58,933 INFO L225 Difference]: With dead ends: 40720 [2021-06-05 05:41:58,934 INFO L226 Difference]: Without dead ends: 40501 [2021-06-05 05:41:58,934 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3232 ImplicationChecksByTransitivity, 4349.5ms TimeCoverageRelationStatistics Valid=918, Invalid=11964, Unknown=0, NotChecked=0, Total=12882 [2021-06-05 05:41:58,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40501 states. [2021-06-05 05:41:59,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40501 to 31410. [2021-06-05 05:41:59,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31410 states, 31409 states have (on average 3.106689165525805) internal successors, (97578), 31409 states have internal predecessors, (97578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:59,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31410 states to 31410 states and 97578 transitions. [2021-06-05 05:41:59,485 INFO L78 Accepts]: Start accepts. Automaton has 31410 states and 97578 transitions. Word has length 49 [2021-06-05 05:41:59,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:41:59,486 INFO L482 AbstractCegarLoop]: Abstraction has 31410 states and 97578 transitions. [2021-06-05 05:41:59,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 1.830188679245283) internal successors, (97), 52 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:41:59,486 INFO L276 IsEmpty]: Start isEmpty. Operand 31410 states and 97578 transitions. [2021-06-05 05:41:59,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 05:41:59,519 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:41:59,519 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 05:41:59,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2021-06-05 05:41:59,720 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:41:59,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:41:59,720 INFO L82 PathProgramCache]: Analyzing trace with hash -969085764, now seen corresponding path program 172 times [2021-06-05 05:41:59,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:41:59,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286325263] [2021-06-05 05:41:59,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:41:59,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:00,322 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:00,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:42:00,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286325263] [2021-06-05 05:42:00,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286325263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:00,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500861522] [2021-06-05 05:42:00,322 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:00,351 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:42:00,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:42:00,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 59 conjunts are in the unsatisfiable core [2021-06-05 05:42:00,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:42:01,003 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:42:01,003 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 27 [2021-06-05 05:42:01,004 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:42:01,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:42:01,012 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 05:42:01,012 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:80, output treesize:43 [2021-06-05 05:42:01,383 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:42:01,383 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 54 treesize of output 26 [2021-06-05 05:42:01,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:42:01,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:42:01,390 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 05:42:01,391 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:63, output treesize:20 [2021-06-05 05:42:01,645 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:01,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500861522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:01,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:42:01,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 26] total 54 [2021-06-05 05:42:01,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210835438] [2021-06-05 05:42:01,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-06-05 05:42:01,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:42:01,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-06-05 05:42:01,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2830, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 05:42:01,646 INFO L87 Difference]: Start difference. First operand 31410 states and 97578 transitions. Second operand has 55 states, 55 states have (on average 1.7636363636363637) internal successors, (97), 54 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:07,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:42:07,680 INFO L93 Difference]: Finished difference Result 41342 states and 126398 transitions. [2021-06-05 05:42:07,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 05:42:07,681 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.7636363636363637) internal successors, (97), 54 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 05:42:07,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:42:07,743 INFO L225 Difference]: With dead ends: 41342 [2021-06-05 05:42:07,743 INFO L226 Difference]: Without dead ends: 41123 [2021-06-05 05:42:07,744 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2868 ImplicationChecksByTransitivity, 4594.8ms TimeCoverageRelationStatistics Valid=753, Invalid=11903, Unknown=0, NotChecked=0, Total=12656 [2021-06-05 05:42:07,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41123 states. [2021-06-05 05:42:08,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41123 to 31403. [2021-06-05 05:42:08,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31403 states, 31402 states have (on average 3.1067129482198585) internal successors, (97557), 31402 states have internal predecessors, (97557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:08,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31403 states to 31403 states and 97557 transitions. [2021-06-05 05:42:08,275 INFO L78 Accepts]: Start accepts. Automaton has 31403 states and 97557 transitions. Word has length 49 [2021-06-05 05:42:08,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:42:08,275 INFO L482 AbstractCegarLoop]: Abstraction has 31403 states and 97557 transitions. [2021-06-05 05:42:08,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 1.7636363636363637) internal successors, (97), 54 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:08,276 INFO L276 IsEmpty]: Start isEmpty. Operand 31403 states and 97557 transitions. [2021-06-05 05:42:08,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 05:42:08,310 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:42:08,310 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 05:42:08,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-06-05 05:42:08,511 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:42:08,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:42:08,511 INFO L82 PathProgramCache]: Analyzing trace with hash 727220476, now seen corresponding path program 173 times [2021-06-05 05:42:08,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:42:08,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867060748] [2021-06-05 05:42:08,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:42:08,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:08,987 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:08,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:42:08,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867060748] [2021-06-05 05:42:08,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867060748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:08,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856868887] [2021-06-05 05:42:08,988 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:09,018 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:42:09,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:42:09,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 60 conjunts are in the unsatisfiable core [2021-06-05 05:42:09,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:42:09,652 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:42:09,652 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 27 [2021-06-05 05:42:09,653 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:42:09,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:42:09,661 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 05:42:09,661 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:80, output treesize:43 [2021-06-05 05:42:10,036 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:42:10,036 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 54 treesize of output 26 [2021-06-05 05:42:10,037 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:42:10,042 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:42:10,043 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 05:42:10,043 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:63, output treesize:20 [2021-06-05 05:42:10,325 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:10,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856868887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:10,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:42:10,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 52 [2021-06-05 05:42:10,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139301718] [2021-06-05 05:42:10,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-06-05 05:42:10,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:42:10,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-06-05 05:42:10,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=2638, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 05:42:10,326 INFO L87 Difference]: Start difference. First operand 31403 states and 97557 transitions. Second operand has 53 states, 53 states have (on average 1.830188679245283) internal successors, (97), 52 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:15,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:42:15,789 INFO L93 Difference]: Finished difference Result 32325 states and 100076 transitions. [2021-06-05 05:42:15,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 05:42:15,790 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.830188679245283) internal successors, (97), 52 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 05:42:15,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:42:15,844 INFO L225 Difference]: With dead ends: 32325 [2021-06-05 05:42:15,844 INFO L226 Difference]: Without dead ends: 32188 [2021-06-05 05:42:15,845 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 3537.0ms TimeCoverageRelationStatistics Valid=326, Invalid=7156, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 05:42:15,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32188 states. [2021-06-05 05:42:16,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32188 to 31433. [2021-06-05 05:42:16,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31433 states, 31432 states have (on average 3.106515652837872) internal successors, (97644), 31432 states have internal predecessors, (97644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:16,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31433 states to 31433 states and 97644 transitions. [2021-06-05 05:42:16,357 INFO L78 Accepts]: Start accepts. Automaton has 31433 states and 97644 transitions. Word has length 49 [2021-06-05 05:42:16,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:42:16,357 INFO L482 AbstractCegarLoop]: Abstraction has 31433 states and 97644 transitions. [2021-06-05 05:42:16,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 1.830188679245283) internal successors, (97), 52 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:16,357 INFO L276 IsEmpty]: Start isEmpty. Operand 31433 states and 97644 transitions. [2021-06-05 05:42:16,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 05:42:16,390 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:42:16,390 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 05:42:16,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2021-06-05 05:42:16,591 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:42:16,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:42:16,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1453492680, now seen corresponding path program 174 times [2021-06-05 05:42:16,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:42:16,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938232188] [2021-06-05 05:42:16,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:42:16,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:17,071 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:17,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:42:17,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938232188] [2021-06-05 05:42:17,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938232188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:17,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987261840] [2021-06-05 05:42:17,071 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:17,102 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:42:17,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:42:17,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 63 conjunts are in the unsatisfiable core [2021-06-05 05:42:17,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:42:17,601 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:42:17,601 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 48 treesize of output 28 [2021-06-05 05:42:17,602 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:42:17,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:42:17,609 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 05:42:17,609 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:70, output treesize:38 [2021-06-05 05:42:17,986 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:42:17,987 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 47 treesize of output 23 [2021-06-05 05:42:17,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:42:17,992 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:42:17,993 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 05:42:17,993 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:21 [2021-06-05 05:42:18,211 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:18,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987261840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:18,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:42:18,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 24] total 50 [2021-06-05 05:42:18,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573967083] [2021-06-05 05:42:18,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-06-05 05:42:18,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:42:18,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-06-05 05:42:18,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=2434, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 05:42:18,212 INFO L87 Difference]: Start difference. First operand 31433 states and 97644 transitions. Second operand has 51 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 50 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:23,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:42:23,429 INFO L93 Difference]: Finished difference Result 32727 states and 101197 transitions. [2021-06-05 05:42:23,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 05:42:23,430 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 50 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 05:42:23,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:42:23,480 INFO L225 Difference]: With dead ends: 32727 [2021-06-05 05:42:23,481 INFO L226 Difference]: Without dead ends: 32533 [2021-06-05 05:42:23,481 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1153 ImplicationChecksByTransitivity, 3114.5ms TimeCoverageRelationStatistics Valid=323, Invalid=6649, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 05:42:23,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32533 states. [2021-06-05 05:42:23,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32533 to 31489. [2021-06-05 05:42:23,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31489 states, 31488 states have (on average 3.1062309451219514) internal successors, (97809), 31488 states have internal predecessors, (97809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:23,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31489 states to 31489 states and 97809 transitions. [2021-06-05 05:42:23,936 INFO L78 Accepts]: Start accepts. Automaton has 31489 states and 97809 transitions. Word has length 49 [2021-06-05 05:42:23,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:42:23,936 INFO L482 AbstractCegarLoop]: Abstraction has 31489 states and 97809 transitions. [2021-06-05 05:42:23,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 50 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:23,936 INFO L276 IsEmpty]: Start isEmpty. Operand 31489 states and 97809 transitions. [2021-06-05 05:42:23,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 05:42:23,973 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:42:23,973 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 05:42:24,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:24,174 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:42:24,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:42:24,174 INFO L82 PathProgramCache]: Analyzing trace with hash -2102077402, now seen corresponding path program 175 times [2021-06-05 05:42:24,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:42:24,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162021665] [2021-06-05 05:42:24,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:42:24,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:24,696 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:24,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:42:24,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162021665] [2021-06-05 05:42:24,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162021665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:24,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226213178] [2021-06-05 05:42:24,697 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:24,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:24,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 59 conjunts are in the unsatisfiable core [2021-06-05 05:42:24,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:42:25,383 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:42:25,383 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 27 [2021-06-05 05:42:25,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:42:25,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:42:25,392 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 05:42:25,393 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:78, output treesize:41 [2021-06-05 05:42:25,758 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:42:25,758 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 54 treesize of output 26 [2021-06-05 05:42:25,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:42:25,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:42:25,765 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 05:42:25,765 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:63, output treesize:20 [2021-06-05 05:42:26,017 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:26,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226213178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:26,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:42:26,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 26] total 54 [2021-06-05 05:42:26,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891947712] [2021-06-05 05:42:26,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-06-05 05:42:26,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:42:26,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-06-05 05:42:26,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2830, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 05:42:26,018 INFO L87 Difference]: Start difference. First operand 31489 states and 97809 transitions. Second operand has 55 states, 55 states have (on average 1.7636363636363637) internal successors, (97), 54 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:32,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:42:32,009 INFO L93 Difference]: Finished difference Result 41976 states and 128315 transitions. [2021-06-05 05:42:32,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 05:42:32,009 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.7636363636363637) internal successors, (97), 54 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 05:42:32,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:42:32,071 INFO L225 Difference]: With dead ends: 41976 [2021-06-05 05:42:32,071 INFO L226 Difference]: Without dead ends: 41757 [2021-06-05 05:42:32,072 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2600 ImplicationChecksByTransitivity, 4285.3ms TimeCoverageRelationStatistics Valid=700, Invalid=11072, Unknown=0, NotChecked=0, Total=11772 [2021-06-05 05:42:32,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41757 states. [2021-06-05 05:42:32,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41757 to 31615. [2021-06-05 05:42:32,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31615 states, 31614 states have (on average 3.1058075536154868) internal successors, (98187), 31614 states have internal predecessors, (98187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:32,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31615 states to 31615 states and 98187 transitions. [2021-06-05 05:42:32,700 INFO L78 Accepts]: Start accepts. Automaton has 31615 states and 98187 transitions. Word has length 49 [2021-06-05 05:42:32,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:42:32,700 INFO L482 AbstractCegarLoop]: Abstraction has 31615 states and 98187 transitions. [2021-06-05 05:42:32,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 1.7636363636363637) internal successors, (97), 54 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:32,700 INFO L276 IsEmpty]: Start isEmpty. Operand 31615 states and 98187 transitions. [2021-06-05 05:42:32,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 05:42:32,735 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:42:32,735 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 05:42:32,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable309,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:32,935 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:42:32,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:42:32,936 INFO L82 PathProgramCache]: Analyzing trace with hash -405771162, now seen corresponding path program 176 times [2021-06-05 05:42:32,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:42:32,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652531839] [2021-06-05 05:42:32,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:42:32,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:33,427 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:33,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:42:33,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652531839] [2021-06-05 05:42:33,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652531839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:33,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830622046] [2021-06-05 05:42:33,428 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:33,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:42:33,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:42:33,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 05:42:33,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:42:34,092 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:42:34,093 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 65 treesize of output 37 [2021-06-05 05:42:34,094 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:42:34,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:42:34,102 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 05:42:34,103 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:80, output treesize:49 [2021-06-05 05:42:34,325 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:42:34,326 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 63 treesize of output 31 [2021-06-05 05:42:34,327 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:42:34,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:42:34,332 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 05:42:34,332 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:20 [2021-06-05 05:42:34,592 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:34,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830622046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:34,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:42:34,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 24] total 50 [2021-06-05 05:42:34,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079559032] [2021-06-05 05:42:34,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-06-05 05:42:34,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:42:34,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-06-05 05:42:34,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=2428, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 05:42:34,594 INFO L87 Difference]: Start difference. First operand 31615 states and 98187 transitions. Second operand has 51 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 50 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:39,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:42:39,195 INFO L93 Difference]: Finished difference Result 32867 states and 101628 transitions. [2021-06-05 05:42:39,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 05:42:39,195 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 50 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 05:42:39,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:42:39,241 INFO L225 Difference]: With dead ends: 32867 [2021-06-05 05:42:39,241 INFO L226 Difference]: Without dead ends: 32688 [2021-06-05 05:42:39,241 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1125 ImplicationChecksByTransitivity, 3171.5ms TimeCoverageRelationStatistics Valid=324, Invalid=6482, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 05:42:39,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32688 states. [2021-06-05 05:42:39,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32688 to 31656. [2021-06-05 05:42:39,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31656 states, 31655 states have (on average 3.1051018796398675) internal successors, (98292), 31655 states have internal predecessors, (98292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:39,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31656 states to 31656 states and 98292 transitions. [2021-06-05 05:42:39,668 INFO L78 Accepts]: Start accepts. Automaton has 31656 states and 98292 transitions. Word has length 49 [2021-06-05 05:42:39,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:42:39,668 INFO L482 AbstractCegarLoop]: Abstraction has 31656 states and 98292 transitions. [2021-06-05 05:42:39,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 50 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:39,668 INFO L276 IsEmpty]: Start isEmpty. Operand 31656 states and 98292 transitions. [2021-06-05 05:42:39,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 05:42:39,699 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:42:39,699 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 05:42:39,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2021-06-05 05:42:39,899 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:42:39,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:42:39,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1372447838, now seen corresponding path program 177 times [2021-06-05 05:42:39,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:42:39,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520630738] [2021-06-05 05:42:39,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:42:39,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:40,426 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:40,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:42:40,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520630738] [2021-06-05 05:42:40,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520630738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:40,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984563320] [2021-06-05 05:42:40,426 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:40,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:42:40,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:42:40,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 63 conjunts are in the unsatisfiable core [2021-06-05 05:42:40,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:42:41,219 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:42:41,219 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 49 treesize of output 29 [2021-06-05 05:42:41,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:42:41,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:42:41,231 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 05:42:41,231 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:89, output treesize:56 [2021-06-05 05:42:41,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:42:41,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:42:41,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:42:41,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:42:41,370 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 55 treesize of output 29 [2021-06-05 05:42:41,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:42:41,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:42:41,385 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:42:41,385 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:73, output treesize:20 [2021-06-05 05:42:41,612 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:41,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984563320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:41,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:42:41,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 24] total 50 [2021-06-05 05:42:41,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861160579] [2021-06-05 05:42:41,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-06-05 05:42:41,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:42:41,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-06-05 05:42:41,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=2402, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 05:42:41,613 INFO L87 Difference]: Start difference. First operand 31656 states and 98292 transitions. Second operand has 51 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 50 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:48,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:42:48,984 INFO L93 Difference]: Finished difference Result 44906 states and 136540 transitions. [2021-06-05 05:42:48,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-06-05 05:42:48,985 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 50 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 05:42:48,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:42:49,056 INFO L225 Difference]: With dead ends: 44906 [2021-06-05 05:42:49,056 INFO L226 Difference]: Without dead ends: 44687 [2021-06-05 05:42:49,057 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4198 ImplicationChecksByTransitivity, 5236.8ms TimeCoverageRelationStatistics Valid=1319, Invalid=14683, Unknown=0, NotChecked=0, Total=16002 [2021-06-05 05:42:49,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44687 states. [2021-06-05 05:42:49,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44687 to 32122. [2021-06-05 05:42:49,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32122 states, 32121 states have (on average 3.100557267831014) internal successors, (99593), 32121 states have internal predecessors, (99593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:49,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32122 states to 32122 states and 99593 transitions. [2021-06-05 05:42:49,777 INFO L78 Accepts]: Start accepts. Automaton has 32122 states and 99593 transitions. Word has length 49 [2021-06-05 05:42:49,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:42:49,777 INFO L482 AbstractCegarLoop]: Abstraction has 32122 states and 99593 transitions. [2021-06-05 05:42:49,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 50 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:49,777 INFO L276 IsEmpty]: Start isEmpty. Operand 32122 states and 99593 transitions. [2021-06-05 05:42:49,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 05:42:49,811 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:42:49,812 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 05:42:50,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable314,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:50,012 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:42:50,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:42:50,013 INFO L82 PathProgramCache]: Analyzing trace with hash 323858402, now seen corresponding path program 178 times [2021-06-05 05:42:50,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:42:50,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724132439] [2021-06-05 05:42:50,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:42:50,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:50,501 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:50,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:42:50,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724132439] [2021-06-05 05:42:50,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724132439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:50,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211558049] [2021-06-05 05:42:50,501 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:50,529 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:42:50,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:42:50,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 05:42:50,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:42:51,234 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:42:51,235 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 65 treesize of output 37 [2021-06-05 05:42:51,236 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:42:51,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:42:51,244 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 05:42:51,245 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:88, output treesize:46 [2021-06-05 05:42:51,350 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:42:51,351 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 49 treesize of output 25 [2021-06-05 05:42:51,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:42:51,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:42:51,357 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 05:42:51,357 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:20 [2021-06-05 05:42:51,622 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:51,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211558049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:51,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:42:51,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 48 [2021-06-05 05:42:51,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800361693] [2021-06-05 05:42:51,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-06-05 05:42:51,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:42:51,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-06-05 05:42:51,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=2237, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:42:51,623 INFO L87 Difference]: Start difference. First operand 32122 states and 99593 transitions. Second operand has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 48 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:56,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:42:56,363 INFO L93 Difference]: Finished difference Result 33496 states and 103202 transitions. [2021-06-05 05:42:56,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 05:42:56,364 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 48 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 05:42:56,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:42:56,416 INFO L225 Difference]: With dead ends: 33496 [2021-06-05 05:42:56,416 INFO L226 Difference]: Without dead ends: 33276 [2021-06-05 05:42:56,416 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1370 ImplicationChecksByTransitivity, 3255.6ms TimeCoverageRelationStatistics Valid=371, Invalid=7111, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 05:42:56,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33276 states. [2021-06-05 05:42:56,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33276 to 32264. [2021-06-05 05:42:56,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32264 states, 32263 states have (on average 3.0976970523509904) internal successors, (99941), 32263 states have internal predecessors, (99941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:56,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32264 states to 32264 states and 99941 transitions. [2021-06-05 05:42:56,902 INFO L78 Accepts]: Start accepts. Automaton has 32264 states and 99941 transitions. Word has length 49 [2021-06-05 05:42:56,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:42:56,902 INFO L482 AbstractCegarLoop]: Abstraction has 32264 states and 99941 transitions. [2021-06-05 05:42:56,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 48 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:56,902 INFO L276 IsEmpty]: Start isEmpty. Operand 32264 states and 99941 transitions. [2021-06-05 05:42:56,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 05:42:56,935 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:42:56,935 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 05:42:57,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2021-06-05 05:42:57,135 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:42:57,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:42:57,136 INFO L82 PathProgramCache]: Analyzing trace with hash 141701440, now seen corresponding path program 179 times [2021-06-05 05:42:57,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:42:57,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375404815] [2021-06-05 05:42:57,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:42:57,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:57,659 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:57,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:42:57,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375404815] [2021-06-05 05:42:57,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375404815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:57,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144691441] [2021-06-05 05:42:57,659 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:57,690 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:42:57,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:42:57,691 WARN L261 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 67 conjunts are in the unsatisfiable core [2021-06-05 05:42:57,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:42:58,663 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:42:58,663 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 76 treesize of output 48 [2021-06-05 05:42:58,664 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:42:58,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:42:58,674 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 05:42:58,674 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:97, output treesize:79 [2021-06-05 05:42:58,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:42:58,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:42:58,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:42:58,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:42:58,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:42:58,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:42:58,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:42:58,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:42:58,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:42:58,794 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 80 treesize of output 36 [2021-06-05 05:42:58,795 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:42:58,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:42:58,802 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 05:42:58,802 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:91, output treesize:17 [2021-06-05 05:42:58,914 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:58,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144691441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:58,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:42:58,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24] total 49 [2021-06-05 05:42:58,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135913289] [2021-06-05 05:42:58,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-06-05 05:42:58,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:42:58,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-06-05 05:42:58,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=2262, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 05:42:58,915 INFO L87 Difference]: Start difference. First operand 32264 states and 99941 transitions. Second operand has 50 states, 50 states have (on average 1.94) internal successors, (97), 49 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-06-05 05:42:59,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:42:59,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:59,549 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 05:42:59,550 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 05:42:59,551 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 05:42:59,551 INFO L202 PluginConnector]: Adding new model horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 05:42:59 BasicIcfg [2021-06-05 05:42:59,551 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 05:42:59,552 INFO L168 Benchmark]: Toolchain (without parser) took 781937.05 ms. Allocated memory was 346.0 MB in the beginning and 2.8 GB in the end (delta: 2.5 GB). Free memory was 325.8 MB in the beginning and 2.0 GB in the end (delta: -1.6 GB). Peak memory consumption was 837.9 MB. Max. memory is 16.0 GB. [2021-06-05 05:42:59,552 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 346.0 MB. Free memory is still 327.0 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 05:42:59,552 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.76 ms. Allocated memory is still 346.0 MB. Free memory was 325.8 MB in the beginning and 324.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 05:42:59,552 INFO L168 Benchmark]: Boogie Preprocessor took 11.85 ms. Allocated memory is still 346.0 MB. Free memory was 324.3 MB in the beginning and 323.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 05:42:59,552 INFO L168 Benchmark]: RCFGBuilder took 234.40 ms. Allocated memory is still 346.0 MB. Free memory was 323.1 MB in the beginning and 307.7 MB in the end (delta: 15.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-06-05 05:42:59,552 INFO L168 Benchmark]: TraceAbstraction took 781663.54 ms. Allocated memory was 346.0 MB in the beginning and 2.8 GB in the end (delta: 2.5 GB). Free memory was 307.2 MB in the beginning and 2.0 GB in the end (delta: -1.6 GB). Peak memory consumption was 819.0 MB. Max. memory is 16.0 GB. [2021-06-05 05:42:59,552 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 346.0 MB. Free memory is still 327.0 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 23.76 ms. Allocated memory is still 346.0 MB. Free memory was 325.8 MB in the beginning and 324.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 11.85 ms. Allocated memory is still 346.0 MB. Free memory was 324.3 MB in the beginning and 323.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 234.40 ms. Allocated memory is still 346.0 MB. Free memory was 323.1 MB in the beginning and 307.7 MB in the end (delta: 15.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 781663.54 ms. Allocated memory was 346.0 MB in the beginning and 2.8 GB in the end (delta: 2.5 GB). Free memory was 307.2 MB in the beginning and 2.0 GB in the end (delta: -1.6 GB). Peak memory consumption was 819.0 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 78]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (32264states) and FLOYD_HOARE automaton (currently 11 states, 50 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 58 known predicates. - TimeoutResultAtElement [Line: 77]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (32264states) and FLOYD_HOARE automaton (currently 11 states, 50 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 58 known predicates. - TimeoutResultAtElement [Line: 77]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (32264states) and FLOYD_HOARE automaton (currently 11 states, 50 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 58 known predicates. - TimeoutResultAtElement [Line: 84]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (32264states) and FLOYD_HOARE automaton (currently 11 states, 50 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 58 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 53 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 781570.7ms, OverallIterations: 186, TraceHistogramMax: 3, EmptinessCheckTime: 2234.7ms, AutomataDifference: 525688.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 34.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 35885 SDtfs, 120635 SDslu, 849232 SDs, 0 SdLazy, 609503 SolverSat, 18139 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 212080.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16896 GetRequests, 4083 SyntacticMatches, 86 SemanticMatches, 12726 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221669 ImplicationChecksByTransitivity, 392711.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=32264occurred in iteration=185, InterpolantAutomatonStates: 9353, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 33658.3ms AutomataMinimizationTime, 185 MinimizatonAttempts, 682457 StatesRemovedByMinimization, 182 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 781.8ms SsaConstructionTime, 2826.4ms SatisfiabilityAnalysisTime, 175099.1ms InterpolantComputationTime, 14252 NumberOfCodeBlocks, 14252 NumberOfCodeBlocksAsserted, 684 NumberOfCheckSat, 13883 ConstructedInterpolants, 120 QuantifiedInterpolants, 333787 SizeOfPredicates, 1957 NumberOfNonLiveVariables, 19455 ConjunctsInSsa, 7840 ConjunctsInUnsatCore, 369 InterpolantComputations, 5 PerfectInterpolantSequences, 354/6509 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown