/usr/bin/java -Xmx8000000000 -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-more/dec-subseq-array.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 20:25:38,616 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 20:25:38,617 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 20:25:38,645 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 20:25:38,700 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 [2021-07-13 20:25:38,728 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 20:25:38,729 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 20:25:38,729 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 20:25:38,729 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 20:25:38,732 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 20:25:38,732 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 20:25:38,732 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 20:25:38,732 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 20:25:38,732 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 20:25:38,732 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 20:25:38,733 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 20:25:38,733 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 20:25:38,745 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 20:25:38,745 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 20:25:38,745 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 20:25:38,745 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 20:25:38,745 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 20:25:38,745 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 20:25:38,745 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 20:25:38,746 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 20:25:38,746 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 20:25:38,746 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 20:25:38,746 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 20:25:38,746 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 20:25:38,746 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 20:25:38,747 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 20:25:38,747 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 20:25:38,747 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 20:25:38,747 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 20:25:38,747 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 20:25:38,747 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 20:25:38,747 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 20:25:39,023 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 20:25:39,046 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 20:25:39,049 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 20:25:39,050 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 20:25:39,051 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 20:25:39,052 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/dec-subseq-array.wvr.bpl [2021-07-13 20:25:39,052 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/dec-subseq-array.wvr.bpl' [2021-07-13 20:25:39,078 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 20:25:39,080 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 20:25:39,081 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 20:25:39,081 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 20:25:39,081 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 20:25:39,092 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:25:39" (1/1) ... [2021-07-13 20:25:39,101 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:25:39" (1/1) ... [2021-07-13 20:25:39,107 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 20:25:39,108 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 20:25:39,108 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 20:25:39,108 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 20:25:39,114 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:25:39" (1/1) ... [2021-07-13 20:25:39,114 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:25:39" (1/1) ... [2021-07-13 20:25:39,115 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:25:39" (1/1) ... [2021-07-13 20:25:39,115 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:25:39" (1/1) ... [2021-07-13 20:25:39,117 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:25:39" (1/1) ... [2021-07-13 20:25:39,119 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:25:39" (1/1) ... [2021-07-13 20:25:39,120 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:25:39" (1/1) ... [2021-07-13 20:25:39,121 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 20:25:39,122 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 20:25:39,122 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 20:25:39,122 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 20:25:39,123 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:25:39" (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 [2021-07-13 20:25:39,194 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 20:25:39,194 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 20:25:39,194 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 20:25:39,194 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 20:25:39,194 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 20:25:39,195 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 20:25:39,195 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 20:25:39,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 20:25:39,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 20:25:39,195 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 20:25:39,418 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 20:25:39,419 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-13 20:25:39,421 INFO L202 PluginConnector]: Adding new model dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:25:39 BoogieIcfgContainer [2021-07-13 20:25:39,421 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 20:25:39,422 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 20:25:39,422 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 20:25:39,425 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 20:25:39,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:25:39" (1/2) ... [2021-07-13 20:25:39,425 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cd07368 and model type dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 08:25:39, skipping insertion in model container [2021-07-13 20:25:39,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:25:39" (2/2) ... [2021-07-13 20:25:39,427 INFO L111 eAbstractionObserver]: Analyzing ICFG dec-subseq-array.wvr.bpl [2021-07-13 20:25:39,431 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 20:25:39,432 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 20:25:39,432 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 20:25:39,432 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 20:25:39,476 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-07-13 20:25:39,513 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-13 20:25:39,528 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 20:25:39,529 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 20:25:39,529 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 20:25:39,529 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 20:25:39,529 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 20:25:39,529 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 20:25:39,529 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 20:25:39,529 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 20:25:39,537 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 28 transitions, 72 flow [2021-07-13 20:25:39,564 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 63 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 62 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:39,567 INFO L276 IsEmpty]: Start isEmpty. Operand has 63 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 62 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:39,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 20:25:39,574 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:39,574 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:25:39,575 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:39,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:39,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1034289359, now seen corresponding path program 1 times [2021-07-13 20:25:39,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:39,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353372188] [2021-07-13 20:25:39,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:39,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:39,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:39,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:39,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353372188] [2021-07-13 20:25:39,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353372188] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:25:39,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:25:39,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 20:25:39,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564221354] [2021-07-13 20:25:39,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 20:25:39,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:39,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 20:25:39,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:25:39,770 INFO L87 Difference]: Start difference. First operand has 63 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 62 states have internal predecessors, (125), 0 states have call successors, (0), 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 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:39,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:39,809 INFO L93 Difference]: Finished difference Result 104 states and 211 transitions. [2021-07-13 20:25:39,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 20:25:39,811 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-13 20:25:39,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:39,830 INFO L225 Difference]: With dead ends: 104 [2021-07-13 20:25:39,830 INFO L226 Difference]: Without dead ends: 87 [2021-07-13 20:25:39,831 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:25:39,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-07-13 20:25:39,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 71. [2021-07-13 20:25:39,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.0285714285714285) internal successors, (142), 70 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:39,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 142 transitions. [2021-07-13 20:25:39,879 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 142 transitions. Word has length 14 [2021-07-13 20:25:39,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:39,880 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 142 transitions. [2021-07-13 20:25:39,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:39,880 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 142 transitions. [2021-07-13 20:25:39,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 20:25:39,882 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:39,882 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:25:39,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 20:25:39,882 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:39,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:39,887 INFO L82 PathProgramCache]: Analyzing trace with hash -690736212, now seen corresponding path program 1 times [2021-07-13 20:25:39,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:39,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665831708] [2021-07-13 20:25:39,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:39,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:39,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:39,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:39,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665831708] [2021-07-13 20:25:39,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665831708] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:25:39,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:25:39,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 20:25:39,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355170651] [2021-07-13 20:25:39,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:25:39,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:39,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:25:39,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:25:39,980 INFO L87 Difference]: Start difference. First operand 71 states and 142 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:40,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:40,013 INFO L93 Difference]: Finished difference Result 91 states and 175 transitions. [2021-07-13 20:25:40,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 20:25:40,014 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 20:25:40,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:40,015 INFO L225 Difference]: With dead ends: 91 [2021-07-13 20:25:40,015 INFO L226 Difference]: Without dead ends: 83 [2021-07-13 20:25:40,016 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:25:40,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-07-13 20:25:40,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-07-13 20:25:40,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0121951219512195) internal successors, (165), 82 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:40,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 165 transitions. [2021-07-13 20:25:40,024 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 165 transitions. Word has length 18 [2021-07-13 20:25:40,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:40,024 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 165 transitions. [2021-07-13 20:25:40,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:40,024 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 165 transitions. [2021-07-13 20:25:40,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:25:40,025 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:40,025 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:25:40,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-13 20:25:40,026 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:40,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:40,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1451962588, now seen corresponding path program 1 times [2021-07-13 20:25:40,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:40,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042614490] [2021-07-13 20:25:40,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:40,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:40,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:40,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:40,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042614490] [2021-07-13 20:25:40,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042614490] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:40,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702251556] [2021-07-13 20:25:40,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:40,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:40,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:25:40,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:40,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 20:25:40,471 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:25:40,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:40,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:40,481 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:14, output treesize:7 [2021-07-13 20:25:40,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-13 20:25:40,527 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:25:40,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:40,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:40,536 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:5 [2021-07-13 20:25:40,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:40,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702251556] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:40,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:40,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-07-13 20:25:40,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705814808] [2021-07-13 20:25:40,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:25:40,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:40,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:25:40,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:25:40,572 INFO L87 Difference]: Start difference. First operand 83 states and 165 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:40,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:40,680 INFO L93 Difference]: Finished difference Result 154 states and 314 transitions. [2021-07-13 20:25:40,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:25:40,681 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:25:40,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:40,686 INFO L225 Difference]: With dead ends: 154 [2021-07-13 20:25:40,687 INFO L226 Difference]: Without dead ends: 137 [2021-07-13 20:25:40,687 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 104.7ms TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:25:40,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-07-13 20:25:40,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 115. [2021-07-13 20:25:40,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.043859649122807) internal successors, (233), 114 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:40,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 233 transitions. [2021-07-13 20:25:40,704 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 233 transitions. Word has length 23 [2021-07-13 20:25:40,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:40,705 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 233 transitions. [2021-07-13 20:25:40,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:40,705 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 233 transitions. [2021-07-13 20:25:40,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:25:40,706 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:40,706 INFO L508 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] [2021-07-13 20:25:40,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-07-13 20:25:40,907 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:40,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:40,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1705470663, now seen corresponding path program 2 times [2021-07-13 20:25:40,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:40,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211580932] [2021-07-13 20:25:40,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:40,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:40,963 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:40,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:40,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211580932] [2021-07-13 20:25:40,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211580932] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:40,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191704457] [2021-07-13 20:25:40,964 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 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 [2021-07-13 20:25:40,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:25:40,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:40,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-13 20:25:40,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:41,072 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:41,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191704457] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:41,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:41,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-07-13 20:25:41,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179664012] [2021-07-13 20:25:41,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 20:25:41,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:41,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 20:25:41,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:25:41,074 INFO L87 Difference]: Start difference. First operand 115 states and 233 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:41,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:41,160 INFO L93 Difference]: Finished difference Result 284 states and 566 transitions. [2021-07-13 20:25:41,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 20:25:41,160 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:25:41,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:41,161 INFO L225 Difference]: With dead ends: 284 [2021-07-13 20:25:41,161 INFO L226 Difference]: Without dead ends: 264 [2021-07-13 20:25:41,162 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 32.0ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:25:41,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-07-13 20:25:41,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 230. [2021-07-13 20:25:41,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.1222707423580784) internal successors, (486), 229 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:41,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 486 transitions. [2021-07-13 20:25:41,175 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 486 transitions. Word has length 27 [2021-07-13 20:25:41,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:41,176 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 486 transitions. [2021-07-13 20:25:41,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:41,176 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 486 transitions. [2021-07-13 20:25:41,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 20:25:41,178 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:41,178 INFO L508 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] [2021-07-13 20:25:41,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:41,383 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:41,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:41,383 INFO L82 PathProgramCache]: Analyzing trace with hash -906793463, now seen corresponding path program 3 times [2021-07-13 20:25:41,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:41,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294592612] [2021-07-13 20:25:41,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:41,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:41,645 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:41,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:41,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294592612] [2021-07-13 20:25:41,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294592612] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:41,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262042295] [2021-07-13 20:25:41,646 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:41,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:25:41,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:41,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:25:41,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:41,958 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:41,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 27 [2021-07-13 20:25:41,972 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:25:41,983 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:41,984 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:41,984 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:16 [2021-07-13 20:25:42,195 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:42,195 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 20 treesize of output 38 [2021-07-13 20:25:42,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:25:42,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:42,286 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:42,286 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:21 [2021-07-13 20:25:42,379 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:42,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262042295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:42,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:42,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 27 [2021-07-13 20:25:42,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484977818] [2021-07-13 20:25:42,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:25:42,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:42,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:25:42,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:25:42,384 INFO L87 Difference]: Start difference. First operand 230 states and 486 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:44,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:44,504 INFO L93 Difference]: Finished difference Result 650 states and 1347 transitions. [2021-07-13 20:25:44,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:25:44,508 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-13 20:25:44,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:44,511 INFO L225 Difference]: With dead ends: 650 [2021-07-13 20:25:44,511 INFO L226 Difference]: Without dead ends: 573 [2021-07-13 20:25:44,512 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1600.4ms TimeCoverageRelationStatistics Valid=665, Invalid=2875, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:25:44,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-07-13 20:25:44,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 386. [2021-07-13 20:25:44,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.1818181818181817) internal successors, (840), 385 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:44,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 840 transitions. [2021-07-13 20:25:44,532 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 840 transitions. Word has length 32 [2021-07-13 20:25:44,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:44,532 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 840 transitions. [2021-07-13 20:25:44,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:44,532 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 840 transitions. [2021-07-13 20:25:44,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 20:25:44,535 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:44,535 INFO L508 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] [2021-07-13 20:25:44,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:44,759 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:44,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:44,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1731045687, now seen corresponding path program 4 times [2021-07-13 20:25:44,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:44,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722525276] [2021-07-13 20:25:44,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:44,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:44,981 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:25:44,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:44,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722525276] [2021-07-13 20:25:44,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722525276] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:44,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431633830] [2021-07-13 20:25:44,981 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 [2021-07-13 20:25:45,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:25:45,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:45,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:25:45,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:45,356 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:45,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-07-13 20:25:45,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:25:45,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:45,376 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:25:45,376 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:44, output treesize:30 [2021-07-13 20:25:45,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:25:45,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:25:45,485 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 24 treesize of output 10 [2021-07-13 20:25:45,487 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:25:45,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:45,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:45,496 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:5 [2021-07-13 20:25:45,508 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:45,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431633830] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:45,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:45,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2021-07-13 20:25:45,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421255218] [2021-07-13 20:25:45,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:25:45,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:45,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:25:45,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:25:45,512 INFO L87 Difference]: Start difference. First operand 386 states and 840 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 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) [2021-07-13 20:25:46,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:46,159 INFO L93 Difference]: Finished difference Result 1023 states and 2148 transitions. [2021-07-13 20:25:46,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:25:46,160 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-13 20:25:46,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:46,165 INFO L225 Difference]: With dead ends: 1023 [2021-07-13 20:25:46,166 INFO L226 Difference]: Without dead ends: 878 [2021-07-13 20:25:46,166 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 652.9ms TimeCoverageRelationStatistics Valid=289, Invalid=1271, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:25:46,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-07-13 20:25:46,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 432. [2021-07-13 20:25:46,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 2.1786542923433876) internal successors, (939), 431 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:46,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 939 transitions. [2021-07-13 20:25:46,189 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 939 transitions. Word has length 32 [2021-07-13 20:25:46,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:46,190 INFO L482 AbstractCegarLoop]: Abstraction has 432 states and 939 transitions. [2021-07-13 20:25:46,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 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) [2021-07-13 20:25:46,190 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 939 transitions. [2021-07-13 20:25:46,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 20:25:46,192 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:46,192 INFO L508 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] [2021-07-13 20:25:46,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:46,407 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:46,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:46,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1528740313, now seen corresponding path program 5 times [2021-07-13 20:25:46,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:46,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868141044] [2021-07-13 20:25:46,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:46,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:46,667 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:46,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:46,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868141044] [2021-07-13 20:25:46,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868141044] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:46,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252483354] [2021-07-13 20:25:46,668 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 [2021-07-13 20:25:46,694 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:25:46,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:46,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:25:46,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:46,929 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:46,929 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 24 treesize of output 24 [2021-07-13 20:25:46,933 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:25:46,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:46,943 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:25:46,943 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:24 [2021-07-13 20:25:47,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:25:47,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:25:47,044 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 22 treesize of output 10 [2021-07-13 20:25:47,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:25:47,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:47,052 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:47,053 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:5 [2021-07-13 20:25:47,063 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:47,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252483354] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:47,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:47,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 24 [2021-07-13 20:25:47,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27679002] [2021-07-13 20:25:47,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:25:47,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:47,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:25:47,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:25:47,065 INFO L87 Difference]: Start difference. First operand 432 states and 939 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 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) [2021-07-13 20:25:47,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:47,935 INFO L93 Difference]: Finished difference Result 1081 states and 2273 transitions. [2021-07-13 20:25:47,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:25:47,936 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-13 20:25:47,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:47,940 INFO L225 Difference]: With dead ends: 1081 [2021-07-13 20:25:47,940 INFO L226 Difference]: Without dead ends: 927 [2021-07-13 20:25:47,941 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 734.3ms TimeCoverageRelationStatistics Valid=295, Invalid=1345, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:25:47,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2021-07-13 20:25:47,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 450. [2021-07-13 20:25:47,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 2.1848552338530065) internal successors, (981), 449 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:47,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 981 transitions. [2021-07-13 20:25:47,956 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 981 transitions. Word has length 32 [2021-07-13 20:25:47,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:47,956 INFO L482 AbstractCegarLoop]: Abstraction has 450 states and 981 transitions. [2021-07-13 20:25:47,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 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) [2021-07-13 20:25:47,957 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 981 transitions. [2021-07-13 20:25:47,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 20:25:47,958 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:47,958 INFO L508 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] [2021-07-13 20:25:48,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-13 20:25:48,181 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:48,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:48,182 INFO L82 PathProgramCache]: Analyzing trace with hash -897893841, now seen corresponding path program 6 times [2021-07-13 20:25:48,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:48,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202161799] [2021-07-13 20:25:48,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:48,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:48,442 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:25:48,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:48,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202161799] [2021-07-13 20:25:48,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202161799] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:48,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696235603] [2021-07-13 20:25:48,443 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 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 [2021-07-13 20:25:48,477 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:25:48,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:48,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:25:48,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:48,739 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:48,739 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 24 treesize of output 24 [2021-07-13 20:25:48,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:25:48,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:48,759 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:25:48,759 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:24 [2021-07-13 20:25:48,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:25:48,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:25:48,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:25:48,833 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 22 treesize of output 10 [2021-07-13 20:25:48,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:25:48,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:48,842 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:48,842 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:5 [2021-07-13 20:25:48,852 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:48,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696235603] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:48,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:48,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 22 [2021-07-13 20:25:48,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910184353] [2021-07-13 20:25:48,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:25:48,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:48,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:25:48,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:25:48,854 INFO L87 Difference]: Start difference. First operand 450 states and 981 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:49,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:49,453 INFO L93 Difference]: Finished difference Result 1039 states and 2202 transitions. [2021-07-13 20:25:49,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:25:49,454 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-13 20:25:49,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:49,458 INFO L225 Difference]: With dead ends: 1039 [2021-07-13 20:25:49,458 INFO L226 Difference]: Without dead ends: 929 [2021-07-13 20:25:49,458 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 546.0ms TimeCoverageRelationStatistics Valid=206, Invalid=850, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:25:49,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-07-13 20:25:49,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 487. [2021-07-13 20:25:49,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 2.1790123456790123) internal successors, (1059), 486 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:49,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1059 transitions. [2021-07-13 20:25:49,474 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1059 transitions. Word has length 32 [2021-07-13 20:25:49,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:49,474 INFO L482 AbstractCegarLoop]: Abstraction has 487 states and 1059 transitions. [2021-07-13 20:25:49,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:49,475 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1059 transitions. [2021-07-13 20:25:49,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 20:25:49,476 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:49,476 INFO L508 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] [2021-07-13 20:25:49,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:49,700 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:49,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:49,700 INFO L82 PathProgramCache]: Analyzing trace with hash -960521271, now seen corresponding path program 7 times [2021-07-13 20:25:49,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:49,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562326197] [2021-07-13 20:25:49,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:49,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:49,938 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:49,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:49,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562326197] [2021-07-13 20:25:49,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562326197] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:49,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116800672] [2021-07-13 20:25:49,939 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 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 [2021-07-13 20:25:49,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:49,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:25:49,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:50,253 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:50,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-07-13 20:25:50,257 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:25:50,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:50,266 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:25:50,266 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:44, output treesize:30 [2021-07-13 20:25:50,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:25:50,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:25:50,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:25:50,371 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 24 treesize of output 10 [2021-07-13 20:25:50,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:25:50,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:50,378 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:50,379 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:5 [2021-07-13 20:25:50,389 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:50,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116800672] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:50,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:50,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 24 [2021-07-13 20:25:50,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680331337] [2021-07-13 20:25:50,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:25:50,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:50,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:25:50,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:25:50,391 INFO L87 Difference]: Start difference. First operand 487 states and 1059 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 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) [2021-07-13 20:25:50,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:50,951 INFO L93 Difference]: Finished difference Result 1050 states and 2227 transitions. [2021-07-13 20:25:50,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:25:50,952 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-13 20:25:50,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:50,956 INFO L225 Difference]: With dead ends: 1050 [2021-07-13 20:25:50,956 INFO L226 Difference]: Without dead ends: 952 [2021-07-13 20:25:50,956 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 548.2ms TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:25:50,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2021-07-13 20:25:50,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 467. [2021-07-13 20:25:50,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 2.1609442060085837) internal successors, (1007), 466 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:50,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1007 transitions. [2021-07-13 20:25:50,971 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1007 transitions. Word has length 32 [2021-07-13 20:25:50,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:50,971 INFO L482 AbstractCegarLoop]: Abstraction has 467 states and 1007 transitions. [2021-07-13 20:25:50,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 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) [2021-07-13 20:25:50,972 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1007 transitions. [2021-07-13 20:25:50,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:25:50,973 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:50,973 INFO L508 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] [2021-07-13 20:25:51,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:51,189 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:51,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:51,189 INFO L82 PathProgramCache]: Analyzing trace with hash 2010412006, now seen corresponding path program 8 times [2021-07-13 20:25:51,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:51,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267112688] [2021-07-13 20:25:51,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:51,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:51,245 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:51,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:51,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267112688] [2021-07-13 20:25:51,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267112688] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:51,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780904264] [2021-07-13 20:25:51,245 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 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 [2021-07-13 20:25:51,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:25:51,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:51,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:25:51,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:51,355 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:51,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780904264] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:51,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:51,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2021-07-13 20:25:51,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589339561] [2021-07-13 20:25:51,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:25:51,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:51,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:25:51,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:25:51,356 INFO L87 Difference]: Start difference. First operand 467 states and 1007 transitions. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:51,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:51,440 INFO L93 Difference]: Finished difference Result 885 states and 1908 transitions. [2021-07-13 20:25:51,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 20:25:51,440 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 20:25:51,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:51,444 INFO L225 Difference]: With dead ends: 885 [2021-07-13 20:25:51,444 INFO L226 Difference]: Without dead ends: 847 [2021-07-13 20:25:51,444 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 43.0ms TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:25:51,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-07-13 20:25:51,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 716. [2021-07-13 20:25:51,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 2.1846153846153844) internal successors, (1562), 715 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:51,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1562 transitions. [2021-07-13 20:25:51,461 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1562 transitions. Word has length 36 [2021-07-13 20:25:51,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:51,461 INFO L482 AbstractCegarLoop]: Abstraction has 716 states and 1562 transitions. [2021-07-13 20:25:51,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:51,461 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1562 transitions. [2021-07-13 20:25:51,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 20:25:51,462 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:51,462 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:25:51,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-13 20:25:51,677 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:51,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:51,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1466399466, now seen corresponding path program 9 times [2021-07-13 20:25:51,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:51,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826317471] [2021-07-13 20:25:51,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:51,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:52,065 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:52,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:52,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826317471] [2021-07-13 20:25:52,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826317471] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:52,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629684490] [2021-07-13 20:25:52,065 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 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 [2021-07-13 20:25:52,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:25:52,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:52,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 20:25:52,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:52,504 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:52,505 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 45 treesize of output 53 [2021-07-13 20:25:52,513 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:25:52,557 INFO L628 ElimStorePlain]: treesize reduction 43, result has 58.3 percent of original size [2021-07-13 20:25:52,560 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:52,560 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:51, output treesize:32 [2021-07-13 20:25:52,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:25:52,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:25:52,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:25:52,858 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:52,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 43 [2021-07-13 20:25:52,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:25:52,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:52,893 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:52,893 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:26 [2021-07-13 20:25:52,974 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:52,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629684490] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:52,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:52,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 41 [2021-07-13 20:25:52,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302247452] [2021-07-13 20:25:52,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-07-13 20:25:52,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:52,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-07-13 20:25:52,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1486, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:25:52,977 INFO L87 Difference]: Start difference. First operand 716 states and 1562 transitions. Second operand has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:56,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:56,727 INFO L93 Difference]: Finished difference Result 2812 states and 6023 transitions. [2021-07-13 20:25:56,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-07-13 20:25:56,727 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:25:56,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:56,737 INFO L225 Difference]: With dead ends: 2812 [2021-07-13 20:25:56,737 INFO L226 Difference]: Without dead ends: 2548 [2021-07-13 20:25:56,740 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3752 ImplicationChecksByTransitivity, 3103.4ms TimeCoverageRelationStatistics Valid=1451, Invalid=10321, Unknown=0, NotChecked=0, Total=11772 [2021-07-13 20:25:56,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2548 states. [2021-07-13 20:25:56,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2548 to 737. [2021-07-13 20:25:56,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 2.1480978260869565) internal successors, (1581), 736 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:56,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 1581 transitions. [2021-07-13 20:25:56,768 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 1581 transitions. Word has length 41 [2021-07-13 20:25:56,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:56,768 INFO L482 AbstractCegarLoop]: Abstraction has 737 states and 1581 transitions. [2021-07-13 20:25:56,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:56,769 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 1581 transitions. [2021-07-13 20:25:56,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 20:25:56,770 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:56,770 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:25:56,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:56,985 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:56,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:56,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1999894166, now seen corresponding path program 10 times [2021-07-13 20:25:56,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:56,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138094783] [2021-07-13 20:25:56,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:56,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:57,372 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:25:57,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:57,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138094783] [2021-07-13 20:25:57,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138094783] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:57,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758948564] [2021-07-13 20:25:57,373 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 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 [2021-07-13 20:25:57,420 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:25:57,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:57,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 20:25:57,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:58,118 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:58,119 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 42 treesize of output 52 [2021-07-13 20:25:58,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:25:58,167 INFO L628 ElimStorePlain]: treesize reduction 16, result has 84.3 percent of original size [2021-07-13 20:25:58,181 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:25:58,181 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:65 [2021-07-13 20:25:58,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:25:58,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:25:58,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:25:58,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:25:58,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:25:58,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:25:58,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:25:58,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:25:58,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:25:58,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:25:58,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 16 [2021-07-13 20:25:58,568 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:25:58,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:25:58,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:25:58,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:25:58,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:25:58,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:25:58,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:25:58,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:25:58,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:25:58,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2021-07-13 20:25:58,581 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:25:58,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:58,588 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:58,588 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:104, output treesize:5 [2021-07-13 20:25:58,598 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:58,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758948564] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:58,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:58,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 35 [2021-07-13 20:25:58,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478849113] [2021-07-13 20:25:58,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:25:58,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:58,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:25:58,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1084, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:25:58,600 INFO L87 Difference]: Start difference. First operand 737 states and 1581 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) [2021-07-13 20:26:00,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:26:00,714 INFO L93 Difference]: Finished difference Result 2302 states and 4879 transitions. [2021-07-13 20:26:00,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 20:26:00,715 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 41 [2021-07-13 20:26:00,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:26:00,720 INFO L225 Difference]: With dead ends: 2302 [2021-07-13 20:26:00,720 INFO L226 Difference]: Without dead ends: 2145 [2021-07-13 20:26:00,721 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 21 SyntacticMatches, 8 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1950 ImplicationChecksByTransitivity, 1913.8ms TimeCoverageRelationStatistics Valid=673, Invalid=4297, Unknown=0, NotChecked=0, Total=4970 [2021-07-13 20:26:00,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2145 states. [2021-07-13 20:26:00,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2145 to 854. [2021-07-13 20:26:00,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 2.138335287221571) internal successors, (1824), 853 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:00,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 1824 transitions. [2021-07-13 20:26:00,751 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 1824 transitions. Word has length 41 [2021-07-13 20:26:00,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:26:00,751 INFO L482 AbstractCegarLoop]: Abstraction has 854 states and 1824 transitions. [2021-07-13 20:26:00,752 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) [2021-07-13 20:26:00,752 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 1824 transitions. [2021-07-13 20:26:00,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 20:26:00,754 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:26:00,754 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:26:00,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:26:00,973 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:26:00,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:26:00,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1038925816, now seen corresponding path program 11 times [2021-07-13 20:26:00,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:26:00,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797626825] [2021-07-13 20:26:00,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:26:00,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:26:01,367 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:01,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:26:01,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797626825] [2021-07-13 20:26:01,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797626825] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:01,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284464019] [2021-07-13 20:26:01,367 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 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 [2021-07-13 20:26:01,401 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:26:01,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:26:01,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:26:01,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:26:02,001 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:02,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 50 [2021-07-13 20:26:02,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:02,063 INFO L628 ElimStorePlain]: treesize reduction 16, result has 83.0 percent of original size [2021-07-13 20:26:02,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:26:02,074 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:54, output treesize:57 [2021-07-13 20:26:02,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:02,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:02,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:02,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:02,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:02,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:26:02,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:02,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:26:02,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-13 20:26:02,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:02,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:02,315 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:26:02,315 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:5 [2021-07-13 20:26:02,323 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:02,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284464019] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:02,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:26:02,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-07-13 20:26:02,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751243632] [2021-07-13 20:26:02,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:26:02,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:26:02,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:26:02,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1153, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:26:02,327 INFO L87 Difference]: Start difference. First operand 854 states and 1824 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) [2021-07-13 20:26:04,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:26:04,793 INFO L93 Difference]: Finished difference Result 2586 states and 5448 transitions. [2021-07-13 20:26:04,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-13 20:26:04,793 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 41 [2021-07-13 20:26:04,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:26:04,800 INFO L225 Difference]: With dead ends: 2586 [2021-07-13 20:26:04,800 INFO L226 Difference]: Without dead ends: 2295 [2021-07-13 20:26:04,801 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2184 ImplicationChecksByTransitivity, 2132.0ms TimeCoverageRelationStatistics Valid=836, Invalid=5326, Unknown=0, NotChecked=0, Total=6162 [2021-07-13 20:26:04,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2295 states. [2021-07-13 20:26:04,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2295 to 746. [2021-07-13 20:26:04,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 745 states have (on average 2.153020134228188) internal successors, (1604), 745 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:04,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1604 transitions. [2021-07-13 20:26:04,824 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1604 transitions. Word has length 41 [2021-07-13 20:26:04,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:26:04,824 INFO L482 AbstractCegarLoop]: Abstraction has 746 states and 1604 transitions. [2021-07-13 20:26:04,824 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) [2021-07-13 20:26:04,825 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1604 transitions. [2021-07-13 20:26:04,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 20:26:04,826 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:26:04,826 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:26:05,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:26:05,041 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:26:05,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:26:05,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1257871970, now seen corresponding path program 12 times [2021-07-13 20:26:05,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:26:05,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088993059] [2021-07-13 20:26:05,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:26:05,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:26:05,405 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:26:05,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:26:05,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088993059] [2021-07-13 20:26:05,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088993059] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:05,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225702685] [2021-07-13 20:26:05,406 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 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 [2021-07-13 20:26:05,452 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:26:05,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:26:05,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:26:05,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:26:06,290 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:06,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 50 [2021-07-13 20:26:06,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:06,336 INFO L628 ElimStorePlain]: treesize reduction 14, result has 83.7 percent of original size [2021-07-13 20:26:06,361 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:26:06,361 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:52, output treesize:53 [2021-07-13 20:26:07,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:07,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:07,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:26:07,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:26:07,478 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:07,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 29 treesize of output 63 [2021-07-13 20:26:07,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-13 20:26:07,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:07,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:07,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:26:07,553 INFO L354 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2021-07-13 20:26:07,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 40 treesize of output 1 [2021-07-13 20:26:07,554 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:07,589 INFO L628 ElimStorePlain]: treesize reduction 21, result has 59.6 percent of original size [2021-07-13 20:26:07,594 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:26:07,594 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:100, output treesize:21 [2021-07-13 20:26:07,685 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:07,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225702685] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:07,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:26:07,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-07-13 20:26:07,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754106721] [2021-07-13 20:26:07,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:26:07,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:26:07,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:26:07,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:26:07,687 INFO L87 Difference]: Start difference. First operand 746 states and 1604 transitions. Second operand has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:11,040 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-07-13 20:26:12,225 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-07-13 20:26:12,889 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-07-13 20:26:13,255 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-07-13 20:26:14,078 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-07-13 20:26:14,762 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-07-13 20:26:17,491 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-07-13 20:26:19,473 WARN L205 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2021-07-13 20:26:19,924 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-07-13 20:26:23,167 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2021-07-13 20:26:26,729 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-07-13 20:26:26,970 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 47 [2021-07-13 20:26:29,856 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2021-07-13 20:26:31,317 WARN L205 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2021-07-13 20:26:31,934 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-07-13 20:26:33,441 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 46 [2021-07-13 20:26:37,702 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2021-07-13 20:26:38,947 WARN L205 SmtUtils]: Spent 982.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-07-13 20:26:40,379 WARN L205 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2021-07-13 20:26:41,200 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2021-07-13 20:26:43,727 WARN L205 SmtUtils]: Spent 865.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2021-07-13 20:26:46,510 WARN L205 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-07-13 20:26:46,988 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-07-13 20:26:47,973 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2021-07-13 20:26:49,675 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2021-07-13 20:26:51,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:26:51,601 INFO L93 Difference]: Finished difference Result 3393 states and 7212 transitions. [2021-07-13 20:26:51,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-07-13 20:26:51,602 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:26:51,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:26:51,609 INFO L225 Difference]: With dead ends: 3393 [2021-07-13 20:26:51,609 INFO L226 Difference]: Without dead ends: 3071 [2021-07-13 20:26:51,612 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 20 SyntacticMatches, 8 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5845 ImplicationChecksByTransitivity, 27220.0ms TimeCoverageRelationStatistics Valid=2687, Invalid=14343, Unknown=0, NotChecked=0, Total=17030 [2021-07-13 20:26:51,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3071 states. [2021-07-13 20:26:51,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3071 to 882. [2021-07-13 20:26:51,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 881 states have (on average 2.155505107832009) internal successors, (1899), 881 states have internal predecessors, (1899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:51,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 1899 transitions. [2021-07-13 20:26:51,638 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 1899 transitions. Word has length 41 [2021-07-13 20:26:51,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:26:51,638 INFO L482 AbstractCegarLoop]: Abstraction has 882 states and 1899 transitions. [2021-07-13 20:26:51,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:51,638 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 1899 transitions. [2021-07-13 20:26:51,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 20:26:51,640 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:26:51,640 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:26:51,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:26:51,861 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:26:51,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:26:51,861 INFO L82 PathProgramCache]: Analyzing trace with hash -2064541460, now seen corresponding path program 13 times [2021-07-13 20:26:51,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:26:51,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24809496] [2021-07-13 20:26:51,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:26:51,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:26:52,230 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:26:52,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:26:52,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24809496] [2021-07-13 20:26:52,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24809496] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:52,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636390510] [2021-07-13 20:26:52,230 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 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 [2021-07-13 20:26:52,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:26:52,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 20:26:52,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:26:52,949 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:52,949 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 42 treesize of output 52 [2021-07-13 20:26:52,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:52,998 INFO L628 ElimStorePlain]: treesize reduction 47, result has 60.8 percent of original size [2021-07-13 20:26:53,019 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:26:53,020 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:41 [2021-07-13 20:26:53,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:53,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:26:53,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:53,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:53,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:53,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:53,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:26:53,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2021-07-13 20:26:53,114 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:53,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:53,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:26:53,122 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:5 [2021-07-13 20:26:53,130 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:53,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636390510] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:53,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:26:53,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 35 [2021-07-13 20:26:53,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771962987] [2021-07-13 20:26:53,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:26:53,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:26:53,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:26:53,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1087, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:26:53,132 INFO L87 Difference]: Start difference. First operand 882 states and 1899 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) [2021-07-13 20:26:55,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:26:55,483 INFO L93 Difference]: Finished difference Result 3308 states and 7100 transitions. [2021-07-13 20:26:55,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 20:26:55,483 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 41 [2021-07-13 20:26:55,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:26:55,494 INFO L225 Difference]: With dead ends: 3308 [2021-07-13 20:26:55,494 INFO L226 Difference]: Without dead ends: 3100 [2021-07-13 20:26:55,495 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1398 ImplicationChecksByTransitivity, 1649.5ms TimeCoverageRelationStatistics Valid=578, Invalid=3582, Unknown=0, NotChecked=0, Total=4160 [2021-07-13 20:26:55,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3100 states. [2021-07-13 20:26:55,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3100 to 1074. [2021-07-13 20:26:55,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 1073 states have (on average 2.1491146318732524) internal successors, (2306), 1073 states have internal predecessors, (2306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:55,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 2306 transitions. [2021-07-13 20:26:55,523 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 2306 transitions. Word has length 41 [2021-07-13 20:26:55,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:26:55,523 INFO L482 AbstractCegarLoop]: Abstraction has 1074 states and 2306 transitions. [2021-07-13 20:26:55,523 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) [2021-07-13 20:26:55,523 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 2306 transitions. [2021-07-13 20:26:55,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 20:26:55,525 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:26:55,525 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:26:55,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable142 [2021-07-13 20:26:55,745 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:26:55,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:26:55,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1195244540, now seen corresponding path program 14 times [2021-07-13 20:26:55,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:26:55,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906001597] [2021-07-13 20:26:55,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:26:55,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:26:56,132 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:56,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:26:56,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906001597] [2021-07-13 20:26:56,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906001597] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:56,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267082784] [2021-07-13 20:26:56,132 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 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 [2021-07-13 20:26:56,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:26:56,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:26:56,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 20:26:56,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:26:56,856 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:56,856 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 42 treesize of output 52 [2021-07-13 20:26:56,862 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:56,901 INFO L628 ElimStorePlain]: treesize reduction 16, result has 84.3 percent of original size [2021-07-13 20:26:56,909 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:26:56,910 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:65 [2021-07-13 20:26:57,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:57,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:57,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:57,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:57,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:57,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:57,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:26:57,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:26:57,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2021-07-13 20:26:57,058 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:57,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:57,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:26:57,065 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:5 [2021-07-13 20:26:57,074 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:57,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267082784] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:57,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:26:57,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-07-13 20:26:57,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840686256] [2021-07-13 20:26:57,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:26:57,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:26:57,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:26:57,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1158, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:26:57,075 INFO L87 Difference]: Start difference. First operand 1074 states and 2306 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) [2021-07-13 20:26:59,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:26:59,775 INFO L93 Difference]: Finished difference Result 3729 states and 7998 transitions. [2021-07-13 20:26:59,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 20:26:59,775 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 41 [2021-07-13 20:26:59,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:26:59,789 INFO L225 Difference]: With dead ends: 3729 [2021-07-13 20:26:59,789 INFO L226 Difference]: Without dead ends: 3485 [2021-07-13 20:26:59,790 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1375 ImplicationChecksByTransitivity, 1964.2ms TimeCoverageRelationStatistics Valid=606, Invalid=3684, Unknown=0, NotChecked=0, Total=4290 [2021-07-13 20:26:59,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3485 states. [2021-07-13 20:26:59,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3485 to 1340. [2021-07-13 20:26:59,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1340 states, 1339 states have (on average 2.1598207617625094) internal successors, (2892), 1339 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:59,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1340 states to 1340 states and 2892 transitions. [2021-07-13 20:26:59,836 INFO L78 Accepts]: Start accepts. Automaton has 1340 states and 2892 transitions. Word has length 41 [2021-07-13 20:26:59,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:26:59,836 INFO L482 AbstractCegarLoop]: Abstraction has 1340 states and 2892 transitions. [2021-07-13 20:26:59,836 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) [2021-07-13 20:26:59,836 INFO L276 IsEmpty]: Start isEmpty. Operand 1340 states and 2892 transitions. [2021-07-13 20:26:59,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 20:26:59,840 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:26:59,840 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:00,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:00,053 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:00,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:00,053 INFO L82 PathProgramCache]: Analyzing trace with hash -920574034, now seen corresponding path program 15 times [2021-07-13 20:27:00,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:00,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902617718] [2021-07-13 20:27:00,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:00,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:00,425 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:00,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:00,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902617718] [2021-07-13 20:27:00,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902617718] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:00,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748056529] [2021-07-13 20:27:00,426 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 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 [2021-07-13 20:27:00,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:27:00,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:00,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-13 20:27:00,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:00,987 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:00,987 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 40 treesize of output 50 [2021-07-13 20:27:00,993 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:01,038 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.4 percent of original size [2021-07-13 20:27:01,064 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:27:01,064 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:57 [2021-07-13 20:27:01,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:01,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:01,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:01,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:01,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:01,525 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:01,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 63 [2021-07-13 20:27:01,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-13 20:27:01,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:01,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:01,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:01,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:01,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:01,597 INFO L354 Elim1Store]: treesize reduction 28, result has 45.1 percent of original size [2021-07-13 20:27:01,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 38 [2021-07-13 20:27:01,602 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:01,664 INFO L628 ElimStorePlain]: treesize reduction 17, result has 81.9 percent of original size [2021-07-13 20:27:01,696 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:27:01,697 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:113, output treesize:36 [2021-07-13 20:27:01,799 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:01,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748056529] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:01,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:01,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 39 [2021-07-13 20:27:01,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281880372] [2021-07-13 20:27:01,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-07-13 20:27:01,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:01,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-07-13 20:27:01,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1392, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:27:01,801 INFO L87 Difference]: Start difference. First operand 1340 states and 2892 transitions. Second operand has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:05,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:05,328 INFO L93 Difference]: Finished difference Result 3544 states and 7640 transitions. [2021-07-13 20:27:05,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:27:05,328 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:27:05,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:05,334 INFO L225 Difference]: With dead ends: 3544 [2021-07-13 20:27:05,335 INFO L226 Difference]: Without dead ends: 3383 [2021-07-13 20:27:05,335 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1179 ImplicationChecksByTransitivity, 2928.6ms TimeCoverageRelationStatistics Valid=656, Invalid=3900, Unknown=0, NotChecked=0, Total=4556 [2021-07-13 20:27:05,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3383 states. [2021-07-13 20:27:05,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3383 to 1483. [2021-07-13 20:27:05,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1483 states, 1482 states have (on average 2.163292847503374) internal successors, (3206), 1482 states have internal predecessors, (3206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:05,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1483 states to 1483 states and 3206 transitions. [2021-07-13 20:27:05,368 INFO L78 Accepts]: Start accepts. Automaton has 1483 states and 3206 transitions. Word has length 41 [2021-07-13 20:27:05,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:05,368 INFO L482 AbstractCegarLoop]: Abstraction has 1483 states and 3206 transitions. [2021-07-13 20:27:05,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:05,368 INFO L276 IsEmpty]: Start isEmpty. Operand 1483 states and 3206 transitions. [2021-07-13 20:27:05,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-07-13 20:27:05,371 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:05,371 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:05,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-07-13 20:27:05,594 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:05,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:05,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1060291469, now seen corresponding path program 16 times [2021-07-13 20:27:05,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:05,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242429302] [2021-07-13 20:27:05,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:05,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:05,660 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 28 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:05,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:05,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242429302] [2021-07-13 20:27:05,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242429302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:05,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071729723] [2021-07-13 20:27:05,660 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 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 [2021-07-13 20:27:05,714 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:27:05,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:05,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:27:05,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:05,782 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 28 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:05,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071729723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:05,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:05,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 10 [2021-07-13 20:27:05,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095437982] [2021-07-13 20:27:05,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:27:05,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:05,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:27:05,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:27:05,784 INFO L87 Difference]: Start difference. First operand 1483 states and 3206 transitions. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 10 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) [2021-07-13 20:27:05,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:05,881 INFO L93 Difference]: Finished difference Result 2019 states and 4365 transitions. [2021-07-13 20:27:05,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:27:05,882 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 10 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 [2021-07-13 20:27:05,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:05,886 INFO L225 Difference]: With dead ends: 2019 [2021-07-13 20:27:05,886 INFO L226 Difference]: Without dead ends: 1969 [2021-07-13 20:27:05,886 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 61.5ms TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:27:05,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1969 states. [2021-07-13 20:27:05,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1969 to 1621. [2021-07-13 20:27:05,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1620 states have (on average 2.175925925925926) internal successors, (3525), 1620 states have internal predecessors, (3525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:05,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 3525 transitions. [2021-07-13 20:27:05,913 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 3525 transitions. Word has length 45 [2021-07-13 20:27:05,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:05,913 INFO L482 AbstractCegarLoop]: Abstraction has 1621 states and 3525 transitions. [2021-07-13 20:27:05,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 10 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) [2021-07-13 20:27:05,914 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 3525 transitions. [2021-07-13 20:27:05,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-07-13 20:27:05,917 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:05,917 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:06,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:06,133 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:06,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:06,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1067334948, now seen corresponding path program 17 times [2021-07-13 20:27:06,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:06,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962681486] [2021-07-13 20:27:06,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:06,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:06,163 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-07-13 20:27:06,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:06,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962681486] [2021-07-13 20:27:06,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962681486] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:06,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255856037] [2021-07-13 20:27:06,164 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 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 [2021-07-13 20:27:06,211 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:27:06,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:06,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:27:06,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:06,277 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-07-13 20:27:06,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255856037] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:06,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:06,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-07-13 20:27:06,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136940277] [2021-07-13 20:27:06,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:27:06,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:06,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:27:06,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:27:06,279 INFO L87 Difference]: Start difference. First operand 1621 states and 3525 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:06,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:06,307 INFO L93 Difference]: Finished difference Result 2104 states and 4548 transitions. [2021-07-13 20:27:06,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 20:27:06,308 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-07-13 20:27:06,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:06,312 INFO L225 Difference]: With dead ends: 2104 [2021-07-13 20:27:06,312 INFO L226 Difference]: Without dead ends: 2104 [2021-07-13 20:27:06,312 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 17.4ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:27:06,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2021-07-13 20:27:06,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 1445. [2021-07-13 20:27:06,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1445 states, 1444 states have (on average 2.1717451523545708) internal successors, (3136), 1444 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:06,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1445 states to 1445 states and 3136 transitions. [2021-07-13 20:27:06,340 INFO L78 Accepts]: Start accepts. Automaton has 1445 states and 3136 transitions. Word has length 46 [2021-07-13 20:27:06,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:06,340 INFO L482 AbstractCegarLoop]: Abstraction has 1445 states and 3136 transitions. [2021-07-13 20:27:06,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:06,340 INFO L276 IsEmpty]: Start isEmpty. Operand 1445 states and 3136 transitions. [2021-07-13 20:27:06,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-07-13 20:27:06,343 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:06,343 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:06,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:06,565 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:06,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:06,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1691572838, now seen corresponding path program 18 times [2021-07-13 20:27:06,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:06,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626319100] [2021-07-13 20:27:06,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:06,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:06,602 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 20:27:06,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:06,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626319100] [2021-07-13 20:27:06,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626319100] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:06,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186735694] [2021-07-13 20:27:06,602 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 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 [2021-07-13 20:27:06,632 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:27:06,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:06,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:27:06,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:06,689 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-13 20:27:06,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186735694] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:06,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:06,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-07-13 20:27:06,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797917582] [2021-07-13 20:27:06,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 20:27:06,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:06,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 20:27:06,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:27:06,691 INFO L87 Difference]: Start difference. First operand 1445 states and 3136 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:06,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:06,718 INFO L93 Difference]: Finished difference Result 1604 states and 3442 transitions. [2021-07-13 20:27:06,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 20:27:06,718 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-07-13 20:27:06,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:06,720 INFO L225 Difference]: With dead ends: 1604 [2021-07-13 20:27:06,720 INFO L226 Difference]: Without dead ends: 1604 [2021-07-13 20:27:06,720 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 15.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:27:06,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2021-07-13 20:27:06,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 1207. [2021-07-13 20:27:06,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1207 states, 1206 states have (on average 2.1550580431177444) internal successors, (2599), 1206 states have internal predecessors, (2599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:06,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1207 states to 1207 states and 2599 transitions. [2021-07-13 20:27:06,738 INFO L78 Accepts]: Start accepts. Automaton has 1207 states and 2599 transitions. Word has length 46 [2021-07-13 20:27:06,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:06,738 INFO L482 AbstractCegarLoop]: Abstraction has 1207 states and 2599 transitions. [2021-07-13 20:27:06,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:06,738 INFO L276 IsEmpty]: Start isEmpty. Operand 1207 states and 2599 transitions. [2021-07-13 20:27:06,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-07-13 20:27:06,741 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:06,741 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:06,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2021-07-13 20:27:06,965 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:06,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:06,965 INFO L82 PathProgramCache]: Analyzing trace with hash -623804093, now seen corresponding path program 19 times [2021-07-13 20:27:06,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:06,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906913230] [2021-07-13 20:27:06,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:06,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:07,600 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:07,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:07,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906913230] [2021-07-13 20:27:07,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906913230] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:07,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045555449] [2021-07-13 20:27:07,601 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 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 [2021-07-13 20:27:07,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:07,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 20:27:07,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:08,159 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:08,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 87 [2021-07-13 20:27:08,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:08,236 INFO L628 ElimStorePlain]: treesize reduction 86, result has 58.7 percent of original size [2021-07-13 20:27:08,250 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:27:08,250 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:72, output treesize:48 [2021-07-13 20:27:08,706 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-07-13 20:27:08,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 16 [2021-07-13 20:27:08,707 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:08,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:08,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:27:08,711 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:5 [2021-07-13 20:27:08,719 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:08,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045555449] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:08,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:08,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 26] total 49 [2021-07-13 20:27:08,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375932206] [2021-07-13 20:27:08,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-07-13 20:27:08,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:08,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-07-13 20:27:08,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=2161, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:27:08,721 INFO L87 Difference]: Start difference. First operand 1207 states and 2599 transitions. Second operand has 50 states, 50 states have (on average 1.72) internal successors, (86), 49 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:11,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:11,857 INFO L93 Difference]: Finished difference Result 2755 states and 5872 transitions. [2021-07-13 20:27:11,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-13 20:27:11,857 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.72) internal successors, (86), 49 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-07-13 20:27:11,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:11,863 INFO L225 Difference]: With dead ends: 2755 [2021-07-13 20:27:11,863 INFO L226 Difference]: Without dead ends: 2659 [2021-07-13 20:27:11,864 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2594 ImplicationChecksByTransitivity, 2777.9ms TimeCoverageRelationStatistics Valid=812, Invalid=7198, Unknown=0, NotChecked=0, Total=8010 [2021-07-13 20:27:11,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2659 states. [2021-07-13 20:27:11,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2659 to 1299. [2021-07-13 20:27:11,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 1298 states have (on average 2.1656394453004624) internal successors, (2811), 1298 states have internal predecessors, (2811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:11,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 2811 transitions. [2021-07-13 20:27:11,892 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 2811 transitions. Word has length 50 [2021-07-13 20:27:11,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:11,893 INFO L482 AbstractCegarLoop]: Abstraction has 1299 states and 2811 transitions. [2021-07-13 20:27:11,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 1.72) internal successors, (86), 49 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:11,893 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 2811 transitions. [2021-07-13 20:27:11,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-07-13 20:27:11,896 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:11,896 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:12,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:12,119 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:12,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:12,120 INFO L82 PathProgramCache]: Analyzing trace with hash -231269501, now seen corresponding path program 20 times [2021-07-13 20:27:12,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:12,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204531414] [2021-07-13 20:27:12,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:12,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:12,635 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:27:12,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:12,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204531414] [2021-07-13 20:27:12,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204531414] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:12,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644153450] [2021-07-13 20:27:12,636 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 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 [2021-07-13 20:27:12,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:27:12,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:12,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 20:27:12,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:13,938 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:13,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 86 [2021-07-13 20:27:13,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:14,035 INFO L628 ElimStorePlain]: treesize reduction 75, result has 66.5 percent of original size [2021-07-13 20:27:14,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:27:14,073 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:76, output treesize:76 [2021-07-13 20:27:14,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:14,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:14,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:14,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:14,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:14,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:14,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:14,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:27:14,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:14,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:14,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:27:14,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:27:14,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:27:14,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 19 [2021-07-13 20:27:14,614 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:14,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:14,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:14,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:14,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:14,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:14,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:14,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:14,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:27:14,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:14,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:14,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:27:14,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 16 [2021-07-13 20:27:14,626 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:14,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:14,635 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:27:14,635 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:126, output treesize:5 [2021-07-13 20:27:14,644 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 1 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:14,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644153450] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:14,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:14,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 47 [2021-07-13 20:27:14,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616579595] [2021-07-13 20:27:14,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-07-13 20:27:14,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:14,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-07-13 20:27:14,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2012, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:27:14,646 INFO L87 Difference]: Start difference. First operand 1299 states and 2811 transitions. Second operand has 48 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 47 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:20,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:20,173 INFO L93 Difference]: Finished difference Result 3297 states and 7007 transitions. [2021-07-13 20:27:20,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-07-13 20:27:20,173 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 47 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-07-13 20:27:20,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:20,180 INFO L225 Difference]: With dead ends: 3297 [2021-07-13 20:27:20,180 INFO L226 Difference]: Without dead ends: 3184 [2021-07-13 20:27:20,182 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 25 SyntacticMatches, 8 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4889 ImplicationChecksByTransitivity, 4733.1ms TimeCoverageRelationStatistics Valid=1351, Invalid=11305, Unknown=0, NotChecked=0, Total=12656 [2021-07-13 20:27:20,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3184 states. [2021-07-13 20:27:20,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3184 to 1653. [2021-07-13 20:27:20,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1653 states, 1652 states have (on average 2.151331719128329) internal successors, (3554), 1652 states have internal predecessors, (3554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:20,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 3554 transitions. [2021-07-13 20:27:20,218 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 3554 transitions. Word has length 50 [2021-07-13 20:27:20,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:20,218 INFO L482 AbstractCegarLoop]: Abstraction has 1653 states and 3554 transitions. [2021-07-13 20:27:20,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 47 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:20,218 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 3554 transitions. [2021-07-13 20:27:20,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-07-13 20:27:20,222 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:20,222 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:20,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable220 [2021-07-13 20:27:20,437 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:20,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:20,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1024877813, now seen corresponding path program 21 times [2021-07-13 20:27:20,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:20,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525125150] [2021-07-13 20:27:20,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:20,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:21,012 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:21,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:21,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525125150] [2021-07-13 20:27:21,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525125150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:21,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822191802] [2021-07-13 20:27:21,016 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 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 [2021-07-13 20:27:21,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:27:21,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:21,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-13 20:27:21,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:23,645 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-07-13 20:27:23,778 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:23,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 82 [2021-07-13 20:27:23,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:23,831 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:23,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 82 [2021-07-13 20:27:23,849 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:24,077 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 101 [2021-07-13 20:27:24,078 INFO L628 ElimStorePlain]: treesize reduction 124, result has 69.2 percent of original size [2021-07-13 20:27:24,203 INFO L550 ElimStorePlain]: Start of recursive call 1: 14 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 2 xjuncts. [2021-07-13 20:27:24,203 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 15 variables, input treesize:163, output treesize:150 [2021-07-13 20:27:35,825 WARN L205 SmtUtils]: Spent 8.25 s on a formula simplification that was a NOOP. DAG size: 66 [2021-07-13 20:27:57,362 WARN L205 SmtUtils]: Spent 12.52 s on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2021-07-13 20:27:57,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:57,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:27:57,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:57,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:57,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:27:57,721 INFO L354 Elim1Store]: treesize reduction 16, result has 85.8 percent of original size [2021-07-13 20:27:57,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 45 treesize of output 115 [2021-07-13 20:27:58,278 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:58,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:58,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:58,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:58,376 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:58,377 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 6 new quantified variables, introduced 12 case distinctions, treesize of input 38 treesize of output 128 [2021-07-13 20:27:59,544 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 201 [2021-07-13 20:27:59,891 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 261 [2021-07-13 20:28:00,105 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 261 [2021-07-13 20:28:00,312 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 269 [2021-07-13 20:28:01,647 WARN L205 SmtUtils]: Spent 585.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 61 [2021-07-13 20:28:01,851 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 60 [2021-07-13 20:28:02,620 WARN L205 SmtUtils]: Spent 768.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 61 [2021-07-13 20:28:02,657 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-13 20:28:02,925 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 73 [2021-07-13 20:28:02,925 INFO L628 ElimStorePlain]: treesize reduction 474, result has 24.8 percent of original size [2021-07-13 20:28:02,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:28:02,994 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 10 variables, input treesize:133, output treesize:47 [2021-07-13 20:28:03,130 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 3 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:03,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822191802] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:03,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:03,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 50 [2021-07-13 20:28:03,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896229939] [2021-07-13 20:28:03,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-07-13 20:28:03,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:03,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-07-13 20:28:03,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=2270, Unknown=1, NotChecked=0, Total=2550 [2021-07-13 20:28:03,132 INFO L87 Difference]: Start difference. First operand 1653 states and 3554 transitions. Second operand has 51 states, 51 states have (on average 1.8431372549019607) internal successors, (94), 50 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:16,300 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-07-13 20:28:23,466 WARN L205 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 137 DAG size of output: 40 [2021-07-13 20:28:39,019 WARN L205 SmtUtils]: Spent 7.94 s on a formula simplification. DAG size of input: 142 DAG size of output: 42 [2021-07-13 20:28:43,386 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-07-13 20:29:00,075 WARN L205 SmtUtils]: Spent 6.85 s on a formula simplification. DAG size of input: 110 DAG size of output: 69 [2021-07-13 20:29:07,686 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-07-13 20:29:13,584 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2021-07-13 20:29:25,475 WARN L205 SmtUtils]: Spent 2.26 s on a formula simplification. DAG size of input: 85 DAG size of output: 55 [2021-07-13 20:29:32,736 WARN L205 SmtUtils]: Spent 1.70 s on a formula simplification. DAG size of input: 134 DAG size of output: 44 [2021-07-13 20:29:42,872 WARN L205 SmtUtils]: Spent 5.16 s on a formula simplification. DAG size of input: 126 DAG size of output: 73 [2021-07-13 20:29:50,475 WARN L205 SmtUtils]: Spent 5.64 s on a formula simplification. DAG size of input: 124 DAG size of output: 46 [2021-07-13 20:29:55,762 WARN L205 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 83 DAG size of output: 55 [2021-07-13 20:30:08,085 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 55 [2021-07-13 20:30:13,246 WARN L205 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 73 [2021-07-13 20:30:21,414 WARN L205 SmtUtils]: Spent 6.26 s on a formula simplification. DAG size of input: 126 DAG size of output: 48 [2021-07-13 20:30:29,775 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 51 [2021-07-13 20:30:44,233 WARN L205 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 69 [2021-07-13 20:30:52,984 WARN L205 SmtUtils]: Spent 6.16 s on a formula simplification. DAG size of input: 92 DAG size of output: 56 [2021-07-13 20:31:04,055 WARN L205 SmtUtils]: Spent 5.89 s on a formula simplification. DAG size of input: 123 DAG size of output: 51 [2021-07-13 20:31:13,216 WARN L205 SmtUtils]: Spent 2.31 s on a formula simplification. DAG size of input: 90 DAG size of output: 62 [2021-07-13 20:31:15,864 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 69 [2021-07-13 20:31:37,474 WARN L205 SmtUtils]: Spent 6.80 s on a formula simplification. DAG size of input: 125 DAG size of output: 53 [2021-07-13 20:31:49,183 WARN L205 SmtUtils]: Spent 4.29 s on a formula simplification. DAG size of input: 131 DAG size of output: 51 [2021-07-13 20:32:01,807 WARN L205 SmtUtils]: Spent 1.91 s on a formula simplification. DAG size of input: 127 DAG size of output: 68 [2021-07-13 20:32:14,742 WARN L205 SmtUtils]: Spent 2.33 s on a formula simplification. DAG size of input: 100 DAG size of output: 63 [2021-07-13 20:32:26,556 WARN L205 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-07-13 20:32:32,148 WARN L205 SmtUtils]: Spent 4.93 s on a formula simplification. DAG size of input: 141 DAG size of output: 51 [2021-07-13 20:32:40,808 WARN L205 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 75 [2021-07-13 20:33:06,859 WARN L205 SmtUtils]: Spent 8.60 s on a formula simplification. DAG size of input: 129 DAG size of output: 60 [2021-07-13 20:33:26,498 WARN L205 SmtUtils]: Spent 6.33 s on a formula simplification. DAG size of input: 101 DAG size of output: 65 [2021-07-13 20:33:34,422 WARN L205 SmtUtils]: Spent 7.12 s on a formula simplification. DAG size of input: 146 DAG size of output: 53 [2021-07-13 20:33:50,988 WARN L205 SmtUtils]: Spent 5.93 s on a formula simplification. DAG size of input: 130 DAG size of output: 56 [2021-07-13 20:34:11,922 WARN L205 SmtUtils]: Spent 13.02 s on a formula simplification. DAG size of input: 119 DAG size of output: 79 [2021-07-13 20:34:35,712 WARN L205 SmtUtils]: Spent 8.69 s on a formula simplification. DAG size of input: 134 DAG size of output: 62 [2021-07-13 20:34:44,929 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 62 [2021-07-13 20:34:51,683 WARN L205 SmtUtils]: Spent 2.31 s on a formula simplification. DAG size of input: 89 DAG size of output: 61 [2021-07-13 20:35:36,876 WARN L205 SmtUtils]: Spent 8.51 s on a formula simplification. DAG size of input: 140 DAG size of output: 50 [2021-07-13 20:36:05,174 WARN L205 SmtUtils]: Spent 10.66 s on a formula simplification. DAG size of input: 117 DAG size of output: 65 [2021-07-13 20:36:17,369 WARN L205 SmtUtils]: Spent 1.47 s on a formula simplification. DAG size of input: 88 DAG size of output: 58 [2021-07-13 20:36:25,979 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 57 [2021-07-13 20:36:37,161 WARN L205 SmtUtils]: Spent 4.49 s on a formula simplification. DAG size of input: 81 DAG size of output: 43 [2021-07-13 20:37:24,585 WARN L205 SmtUtils]: Spent 6.93 s on a formula simplification. DAG size of input: 145 DAG size of output: 52 [2021-07-13 20:37:42,658 WARN L205 SmtUtils]: Spent 7.06 s on a formula simplification. DAG size of input: 102 DAG size of output: 65 [2021-07-13 20:37:58,745 WARN L205 SmtUtils]: Spent 2.96 s on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2021-07-13 20:38:06,083 WARN L205 SmtUtils]: Spent 2.77 s on a formula simplification. DAG size of input: 85 DAG size of output: 57 [2021-07-13 20:38:24,477 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 63 [2021-07-13 20:38:42,049 WARN L205 SmtUtils]: Spent 9.17 s on a formula simplification. DAG size of input: 105 DAG size of output: 62 [2021-07-13 20:39:12,824 WARN L205 SmtUtils]: Spent 11.54 s on a formula simplification. DAG size of input: 117 DAG size of output: 75 [2021-07-13 20:39:40,902 WARN L205 SmtUtils]: Spent 1.58 s on a formula simplification. DAG size of input: 122 DAG size of output: 65 Received shutdown request... [2021-07-13 20:40:08,313 WARN L222 SmtUtils]: Removed 1 from assertion stack [2021-07-13 20:40:08,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-07-13 20:40:08,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-07-13 20:40:08,514 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-13 20:40:08,516 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-13 20:40:08,517 WARN L196 ceAbstractionStarter]: Timeout [2021-07-13 20:40:08,518 INFO L202 PluginConnector]: Adding new model dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 08:40:08 BasicIcfg [2021-07-13 20:40:08,518 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-13 20:40:08,518 INFO L168 Benchmark]: Toolchain (without parser) took 869438.88 ms. Allocated memory was 192.9 MB in the beginning and 512.8 MB in the end (delta: 319.8 MB). Free memory was 173.2 MB in the beginning and 264.0 MB in the end (delta: -90.8 MB). Peak memory consumption was 230.1 MB. Max. memory is 8.0 GB. [2021-07-13 20:40:08,518 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 192.9 MB. Free memory is still 174.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 20:40:08,518 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.32 ms. Allocated memory is still 192.9 MB. Free memory was 173.2 MB in the beginning and 171.7 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 20:40:08,518 INFO L168 Benchmark]: Boogie Preprocessor took 13.46 ms. Allocated memory is still 192.9 MB. Free memory was 171.7 MB in the beginning and 170.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-07-13 20:40:08,518 INFO L168 Benchmark]: RCFGBuilder took 299.05 ms. Allocated memory is still 192.9 MB. Free memory was 170.7 MB in the beginning and 157.4 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-07-13 20:40:08,519 INFO L168 Benchmark]: TraceAbstraction took 869095.66 ms. Allocated memory was 192.9 MB in the beginning and 512.8 MB in the end (delta: 319.8 MB). Free memory was 157.1 MB in the beginning and 264.0 MB in the end (delta: -107.0 MB). Peak memory consumption was 214.4 MB. Max. memory is 8.0 GB. [2021-07-13 20:40:08,519 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 0.11 ms. Allocated memory is still 192.9 MB. Free memory is still 174.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 26.32 ms. Allocated memory is still 192.9 MB. Free memory was 173.2 MB in the beginning and 171.7 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Preprocessor took 13.46 ms. Allocated memory is still 192.9 MB. Free memory was 171.7 MB in the beginning and 170.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 299.05 ms. Allocated memory is still 192.9 MB. Free memory was 170.7 MB in the beginning and 157.4 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 869095.66 ms. Allocated memory was 192.9 MB in the beginning and 512.8 MB in the end (delta: 319.8 MB). Free memory was 157.1 MB in the beginning and 264.0 MB in the end (delta: -107.0 MB). Peak memory consumption was 214.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 62]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (1653states) and FLOYD_HOARE automaton (currently 113 states, 51 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 93 for 2234ms.. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 41 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 868988.1ms, OverallIterations: 23, TraceHistogramMax: 4, EmptinessCheckTime: 52.7ms, AutomataDifference: 800165.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 35.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1116 SDtfs, 5723 SDslu, 11299 SDs, 0 SdLazy, 26824 SolverSat, 3233 SolverUnsat, 12 SolverUnknown, 0 SolverNotchecked, 129606.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1803 GetRequests, 590 SyntacticMatches, 46 SemanticMatches, 1166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35785 ImplicationChecksByTransitivity, 701583.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1653occurred in iteration=22, InterpolantAutomatonStates: 750, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 526.8ms AutomataMinimizationTime, 22 MinimizatonAttempts, 19446 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 120.9ms SsaConstructionTime, 476.4ms SatisfiabilityAnalysisTime, 62333.6ms InterpolantComputationTime, 1672 NumberOfCodeBlocks, 1672 NumberOfCodeBlocksAsserted, 78 NumberOfCheckSat, 1628 ConstructedInterpolants, 296 QuantifiedInterpolants, 27566 SizeOfPredicates, 225 NumberOfNonLiveVariables, 1741 ConjunctsInSsa, 538 ConjunctsInUnsatCore, 44 InterpolantComputations, 2 PerfectInterpolantSequences, 268/1315 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