/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/clever.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a865e3bea3ade1065a4c95009cfa501fe03c5538-a865e3b [2021-02-19 17:15:38,655 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 17:15:38,657 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 17:15:38,691 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-19 17:15:38,751 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 [2021-02-19 17:15:38,784 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 17:15:38,784 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 17:15:38,785 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-02-19 17:15:38,785 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-02-19 17:15:38,788 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 17:15:38,788 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 17:15:38,788 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 17:15:38,788 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 17:15:38,788 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 17:15:38,789 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 17:15:38,789 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 17:15:38,789 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 17:15:38,789 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 17:15:38,790 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 17:15:38,790 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 17:15:38,790 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 17:15:38,790 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 17:15:38,790 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 17:15:38,790 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 17:15:38,790 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 17:15:38,790 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 17:15:38,791 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-19 17:15:38,791 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 17:15:38,791 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 17:15:38,791 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 17:15:38,791 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 17:15:38,791 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 17:15:38,791 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 17:15:38,791 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 17:15:38,791 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-02-19 17:15:38,792 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 17:15:38,792 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 17:15:39,101 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 17:15:39,199 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 17:15:39,202 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 17:15:39,202 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-02-19 17:15:39,203 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-02-19 17:15:39,204 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/clever.wvr.bpl [2021-02-19 17:15:39,204 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/clever.wvr.bpl' [2021-02-19 17:15:39,229 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 17:15:39,582 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 17:15:39,583 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-02-19 17:15:39,583 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-02-19 17:15:39,583 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-02-19 17:15:39,593 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:15:39" (1/1) ... [2021-02-19 17:15:39,599 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:15:39" (1/1) ... [2021-02-19 17:15:39,605 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-02-19 17:15:39,606 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 17:15:39,606 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 17:15:39,607 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 17:15:39,613 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:15:39" (1/1) ... [2021-02-19 17:15:39,613 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:15:39" (1/1) ... [2021-02-19 17:15:39,614 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:15:39" (1/1) ... [2021-02-19 17:15:39,614 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:15:39" (1/1) ... [2021-02-19 17:15:39,617 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:15:39" (1/1) ... [2021-02-19 17:15:39,620 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:15:39" (1/1) ... [2021-02-19 17:15:39,620 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:15:39" (1/1) ... [2021-02-19 17:15:39,621 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 17:15:39,622 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 17:15:39,623 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 17:15:39,623 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 17:15:39,625 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:15:39" (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 [2021-02-19 17:15:39,700 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-02-19 17:15:39,700 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-02-19 17:15:39,701 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-02-19 17:15:39,701 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-02-19 17:15:39,701 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-02-19 17:15:39,701 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-02-19 17:15:39,701 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-02-19 17:15:39,701 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 17:15:39,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 17:15:39,702 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-02-19 17:15:39,868 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 17:15:39,868 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-19 17:15:39,869 INFO L202 PluginConnector]: Adding new model clever.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 05:15:39 BoogieIcfgContainer [2021-02-19 17:15:39,869 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 17:15:39,871 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 17:15:39,871 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 17:15:39,873 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 17:15:39,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:15:39" (1/2) ... [2021-02-19 17:15:39,876 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bf4a971 and model type clever.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 05:15:39, skipping insertion in model container [2021-02-19 17:15:39,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 05:15:39" (2/2) ... [2021-02-19 17:15:39,877 INFO L111 eAbstractionObserver]: Analyzing ICFG clever.wvr.bpl [2021-02-19 17:15:39,884 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-02-19 17:15:39,884 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 17:15:39,892 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 17:15:39,893 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-02-19 17:15:39,950 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-02-19 17:15:39,976 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-02-19 17:15:39,990 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 17:15:39,990 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 17:15:39,990 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 17:15:39,990 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 17:15:39,990 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 17:15:39,990 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 17:15:39,990 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 17:15:39,990 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 17:15:39,997 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 30 places, 26 transitions, 68 flow [2021-02-19 17:15:40,009 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 61 states, 59 states have (on average 2.0338983050847457) internal successors, (120), 60 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:40,011 INFO L276 IsEmpty]: Start isEmpty. Operand has 61 states, 59 states have (on average 2.0338983050847457) internal successors, (120), 60 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:40,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-02-19 17:15:40,016 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:40,017 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:40,017 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:40,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:40,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1032424820, now seen corresponding path program 1 times [2021-02-19 17:15:40,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:40,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246909001] [2021-02-19 17:15:40,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:40,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:40,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:40,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246909001] [2021-02-19 17:15:40,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:15:40,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-02-19 17:15:40,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800827984] [2021-02-19 17:15:40,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-19 17:15:40,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:40,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-19 17:15:40,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 17:15:40,218 INFO L87 Difference]: Start difference. First operand has 61 states, 59 states have (on average 2.0338983050847457) internal successors, (120), 60 states have internal predecessors, (120), 0 states have call successors, (0), 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 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:40,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:40,256 INFO L93 Difference]: Finished difference Result 99 states and 202 transitions. [2021-02-19 17:15:40,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-19 17:15:40,257 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-02-19 17:15:40,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:40,269 INFO L225 Difference]: With dead ends: 99 [2021-02-19 17:15:40,270 INFO L226 Difference]: Without dead ends: 92 [2021-02-19 17:15:40,271 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 17:15:40,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-02-19 17:15:40,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 80. [2021-02-19 17:15:40,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.0759493670886076) internal successors, (164), 79 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:40,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 164 transitions. [2021-02-19 17:15:40,317 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 164 transitions. Word has length 12 [2021-02-19 17:15:40,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:40,317 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 164 transitions. [2021-02-19 17:15:40,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:40,317 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 164 transitions. [2021-02-19 17:15:40,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:15:40,319 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:40,319 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:40,319 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 17:15:40,319 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:40,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:40,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1455278725, now seen corresponding path program 1 times [2021-02-19 17:15:40,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:40,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496996658] [2021-02-19 17:15:40,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:40,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:40,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:40,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496996658] [2021-02-19 17:15:40,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:15:40,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 17:15:40,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375160902] [2021-02-19 17:15:40,386 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:15:40,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:40,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:15:40,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:15:40,389 INFO L87 Difference]: Start difference. First operand 80 states and 164 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:40,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:40,468 INFO L93 Difference]: Finished difference Result 138 states and 284 transitions. [2021-02-19 17:15:40,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:15:40,469 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-02-19 17:15:40,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:40,472 INFO L225 Difference]: With dead ends: 138 [2021-02-19 17:15:40,472 INFO L226 Difference]: Without dead ends: 131 [2021-02-19 17:15:40,473 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:15:40,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-02-19 17:15:40,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 93. [2021-02-19 17:15:40,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.0543478260869565) internal successors, (189), 92 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:40,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 189 transitions. [2021-02-19 17:15:40,493 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 189 transitions. Word has length 15 [2021-02-19 17:15:40,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:40,493 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 189 transitions. [2021-02-19 17:15:40,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:40,493 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 189 transitions. [2021-02-19 17:15:40,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:15:40,494 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:40,494 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:40,494 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-19 17:15:40,494 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:40,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:40,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1380559181, now seen corresponding path program 2 times [2021-02-19 17:15:40,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:40,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428642398] [2021-02-19 17:15:40,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:40,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:40,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:40,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428642398] [2021-02-19 17:15:40,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084112497] [2021-02-19 17:15:40,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:40,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:15:40,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:40,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 3 conjunts are in the unsatisfiable core [2021-02-19 17:15:40,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:40,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:40,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:40,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-02-19 17:15:40,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440447205] [2021-02-19 17:15:40,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 17:15:40,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:40,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 17:15:40,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-02-19 17:15:40,648 INFO L87 Difference]: Start difference. First operand 93 states and 189 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:40,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:40,685 INFO L93 Difference]: Finished difference Result 139 states and 291 transitions. [2021-02-19 17:15:40,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 17:15:40,686 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-02-19 17:15:40,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:40,687 INFO L225 Difference]: With dead ends: 139 [2021-02-19 17:15:40,687 INFO L226 Difference]: Without dead ends: 139 [2021-02-19 17:15:40,687 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:15:40,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-02-19 17:15:40,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 101. [2021-02-19 17:15:40,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.1) internal successors, (210), 100 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:40,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 210 transitions. [2021-02-19 17:15:40,694 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 210 transitions. Word has length 15 [2021-02-19 17:15:40,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:40,694 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 210 transitions. [2021-02-19 17:15:40,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:40,694 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 210 transitions. [2021-02-19 17:15:40,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:15:40,695 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:40,696 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:40,917 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-02-19 17:15:40,917 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:40,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:40,918 INFO L82 PathProgramCache]: Analyzing trace with hash -137335457, now seen corresponding path program 1 times [2021-02-19 17:15:40,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:40,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817909643] [2021-02-19 17:15:40,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:40,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:41,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:41,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817909643] [2021-02-19 17:15:41,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099318172] [2021-02-19 17:15:41,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:15:41,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:41,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 10 conjunts are in the unsatisfiable core [2021-02-19 17:15:41,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:41,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:41,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:41,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-02-19 17:15:41,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608615385] [2021-02-19 17:15:41,310 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:15:41,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:41,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:15:41,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:15:41,311 INFO L87 Difference]: Start difference. First operand 101 states and 210 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:41,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:41,530 INFO L93 Difference]: Finished difference Result 174 states and 366 transitions. [2021-02-19 17:15:41,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:15:41,530 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:15:41,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:41,531 INFO L225 Difference]: With dead ends: 174 [2021-02-19 17:15:41,532 INFO L226 Difference]: Without dead ends: 153 [2021-02-19 17:15:41,532 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:15:41,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-02-19 17:15:41,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 116. [2021-02-19 17:15:41,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.1652173913043478) internal successors, (249), 115 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:41,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 249 transitions. [2021-02-19 17:15:41,550 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 249 transitions. Word has length 19 [2021-02-19 17:15:41,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:41,550 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 249 transitions. [2021-02-19 17:15:41,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:41,550 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 249 transitions. [2021-02-19 17:15:41,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:15:41,554 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:41,554 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:41,770 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:41,770 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:41,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:41,770 INFO L82 PathProgramCache]: Analyzing trace with hash 750710064, now seen corresponding path program 1 times [2021-02-19 17:15:41,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:41,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918157374] [2021-02-19 17:15:41,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:41,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:41,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:15:41,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918157374] [2021-02-19 17:15:41,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:15:41,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:15:41,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050541280] [2021-02-19 17:15:41,825 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 17:15:41,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:41,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 17:15:41,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:15:41,826 INFO L87 Difference]: Start difference. First operand 116 states and 249 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:41,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:41,845 INFO L93 Difference]: Finished difference Result 139 states and 299 transitions. [2021-02-19 17:15:41,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:15:41,846 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:15:41,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:41,847 INFO L225 Difference]: With dead ends: 139 [2021-02-19 17:15:41,847 INFO L226 Difference]: Without dead ends: 139 [2021-02-19 17:15:41,847 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:15:41,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-02-19 17:15:41,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 119. [2021-02-19 17:15:41,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.1610169491525424) internal successors, (255), 118 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:41,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 255 transitions. [2021-02-19 17:15:41,851 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 255 transitions. Word has length 19 [2021-02-19 17:15:41,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:41,851 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 255 transitions. [2021-02-19 17:15:41,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:41,851 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 255 transitions. [2021-02-19 17:15:41,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:15:41,852 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:41,852 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:41,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-19 17:15:41,852 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:41,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:41,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1715024978, now seen corresponding path program 2 times [2021-02-19 17:15:41,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:41,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456408139] [2021-02-19 17:15:41,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:41,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:41,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:41,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456408139] [2021-02-19 17:15:41,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852109547] [2021-02-19 17:15:41,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:41,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:15:41,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:41,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 17:15:41,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:41,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:41,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:41,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-02-19 17:15:41,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926462411] [2021-02-19 17:15:41,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:15:41,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:41,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:15:41,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:15:41,991 INFO L87 Difference]: Start difference. First operand 119 states and 255 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:42,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:42,111 INFO L93 Difference]: Finished difference Result 323 states and 674 transitions. [2021-02-19 17:15:42,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:15:42,111 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:15:42,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:42,113 INFO L225 Difference]: With dead ends: 323 [2021-02-19 17:15:42,113 INFO L226 Difference]: Without dead ends: 323 [2021-02-19 17:15:42,113 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:15:42,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-02-19 17:15:42,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 214. [2021-02-19 17:15:42,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.2816901408450705) internal successors, (486), 213 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) [2021-02-19 17:15:42,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 486 transitions. [2021-02-19 17:15:42,120 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 486 transitions. Word has length 22 [2021-02-19 17:15:42,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:42,120 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 486 transitions. [2021-02-19 17:15:42,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:42,120 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 486 transitions. [2021-02-19 17:15:42,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:15:42,121 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:42,121 INFO L506 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] [2021-02-19 17:15:42,321 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:42,322 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:42,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:42,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1477133183, now seen corresponding path program 1 times [2021-02-19 17:15:42,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:42,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106449263] [2021-02-19 17:15:42,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:42,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:42,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:42,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106449263] [2021-02-19 17:15:42,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654340927] [2021-02-19 17:15:42,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-02-19 17:15:42,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:42,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:15:42,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:42,721 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:15:42,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:42,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-02-19 17:15:42,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896102160] [2021-02-19 17:15:42,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:15:42,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:42,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:15:42,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:15:42,723 INFO L87 Difference]: Start difference. First operand 214 states and 486 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:43,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:43,138 INFO L93 Difference]: Finished difference Result 526 states and 1173 transitions. [2021-02-19 17:15:43,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:15:43,138 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:15:43,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:43,141 INFO L225 Difference]: With dead ends: 526 [2021-02-19 17:15:43,141 INFO L226 Difference]: Without dead ends: 519 [2021-02-19 17:15:43,141 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:15:43,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-02-19 17:15:43,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 379. [2021-02-19 17:15:43,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 2.3412698412698414) internal successors, (885), 378 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:43,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 885 transitions. [2021-02-19 17:15:43,152 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 885 transitions. Word has length 22 [2021-02-19 17:15:43,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:43,152 INFO L480 AbstractCegarLoop]: Abstraction has 379 states and 885 transitions. [2021-02-19 17:15:43,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:43,152 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 885 transitions. [2021-02-19 17:15:43,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:15:43,153 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:43,153 INFO L506 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] [2021-02-19 17:15:43,375 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:43,375 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:43,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:43,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1557064833, now seen corresponding path program 2 times [2021-02-19 17:15:43,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:43,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473489526] [2021-02-19 17:15:43,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:43,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:43,515 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:43,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473489526] [2021-02-19 17:15:43,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028286069] [2021-02-19 17:15:43,516 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:15:43,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:15:43,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:43,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:43,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:43,686 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:15:43,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:43,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-02-19 17:15:43,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275141770] [2021-02-19 17:15:43,687 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:15:43,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:43,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:15:43,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:15:43,687 INFO L87 Difference]: Start difference. First operand 379 states and 885 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:44,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:44,043 INFO L93 Difference]: Finished difference Result 636 states and 1439 transitions. [2021-02-19 17:15:44,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:15:44,043 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:15:44,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:44,046 INFO L225 Difference]: With dead ends: 636 [2021-02-19 17:15:44,046 INFO L226 Difference]: Without dead ends: 629 [2021-02-19 17:15:44,047 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:15:44,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-02-19 17:15:44,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 503. [2021-02-19 17:15:44,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 2.364541832669323) internal successors, (1187), 502 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:44,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1187 transitions. [2021-02-19 17:15:44,062 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1187 transitions. Word has length 22 [2021-02-19 17:15:44,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:44,064 INFO L480 AbstractCegarLoop]: Abstraction has 503 states and 1187 transitions. [2021-02-19 17:15:44,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:44,065 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1187 transitions. [2021-02-19 17:15:44,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:15:44,066 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:44,066 INFO L506 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] [2021-02-19 17:15:44,283 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:44,283 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:44,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:44,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1877087361, now seen corresponding path program 3 times [2021-02-19 17:15:44,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:44,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767855574] [2021-02-19 17:15:44,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:44,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:44,401 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:44,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767855574] [2021-02-19 17:15:44,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556485649] [2021-02-19 17:15:44,402 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:15:44,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:15:44,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:44,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:15:44,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:44,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:15:44,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:44,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-02-19 17:15:44,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917982486] [2021-02-19 17:15:44,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:15:44,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:44,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:15:44,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:15:44,575 INFO L87 Difference]: Start difference. First operand 503 states and 1187 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:44,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:44,839 INFO L93 Difference]: Finished difference Result 772 states and 1773 transitions. [2021-02-19 17:15:44,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:15:44,840 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:15:44,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:44,846 INFO L225 Difference]: With dead ends: 772 [2021-02-19 17:15:44,846 INFO L226 Difference]: Without dead ends: 758 [2021-02-19 17:15:44,852 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:15:44,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2021-02-19 17:15:44,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 650. [2021-02-19 17:15:44,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 649 states have (on average 2.391371340523883) internal successors, (1552), 649 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:44,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 1552 transitions. [2021-02-19 17:15:44,869 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 1552 transitions. Word has length 22 [2021-02-19 17:15:44,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:44,869 INFO L480 AbstractCegarLoop]: Abstraction has 650 states and 1552 transitions. [2021-02-19 17:15:44,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:44,869 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 1552 transitions. [2021-02-19 17:15:44,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:15:44,871 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:44,871 INFO L506 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] [2021-02-19 17:15:45,087 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:45,088 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:45,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:45,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1470445285, now seen corresponding path program 4 times [2021-02-19 17:15:45,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:45,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528549468] [2021-02-19 17:15:45,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:45,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:45,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:45,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528549468] [2021-02-19 17:15:45,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425890191] [2021-02-19 17:15:45,214 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 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 [2021-02-19 17:15:45,230 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:15:45,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:45,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:15:45,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:45,370 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:15:45,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:45,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-02-19 17:15:45,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281808961] [2021-02-19 17:15:45,373 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:15:45,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:45,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:15:45,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:15:45,374 INFO L87 Difference]: Start difference. First operand 650 states and 1552 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:45,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:45,685 INFO L93 Difference]: Finished difference Result 760 states and 1794 transitions. [2021-02-19 17:15:45,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:15:45,686 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:15:45,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:45,689 INFO L225 Difference]: With dead ends: 760 [2021-02-19 17:15:45,689 INFO L226 Difference]: Without dead ends: 753 [2021-02-19 17:15:45,689 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:15:45,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2021-02-19 17:15:45,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 695. [2021-02-19 17:15:45,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 694 states have (on average 2.403458213256484) internal successors, (1668), 694 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:45,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1668 transitions. [2021-02-19 17:15:45,706 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1668 transitions. Word has length 22 [2021-02-19 17:15:45,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:45,706 INFO L480 AbstractCegarLoop]: Abstraction has 695 states and 1668 transitions. [2021-02-19 17:15:45,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:45,706 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1668 transitions. [2021-02-19 17:15:45,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:15:45,708 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:45,708 INFO L506 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] [2021-02-19 17:15:45,929 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-02-19 17:15:45,930 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:45,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:45,930 INFO L82 PathProgramCache]: Analyzing trace with hash 409667195, now seen corresponding path program 5 times [2021-02-19 17:15:45,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:45,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305207299] [2021-02-19 17:15:45,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:45,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:46,092 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:46,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305207299] [2021-02-19 17:15:46,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171113238] [2021-02-19 17:15:46,093 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 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 [2021-02-19 17:15:46,119 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:15:46,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:46,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:15:46,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:46,248 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:15:46,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:46,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-02-19 17:15:46,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496975445] [2021-02-19 17:15:46,248 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:15:46,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:46,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:15:46,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:15:46,249 INFO L87 Difference]: Start difference. First operand 695 states and 1668 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:46,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:46,536 INFO L93 Difference]: Finished difference Result 812 states and 1925 transitions. [2021-02-19 17:15:46,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:15:46,537 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:15:46,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:46,541 INFO L225 Difference]: With dead ends: 812 [2021-02-19 17:15:46,541 INFO L226 Difference]: Without dead ends: 805 [2021-02-19 17:15:46,542 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:15:46,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2021-02-19 17:15:46,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 745. [2021-02-19 17:15:46,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 744 states have (on average 2.413978494623656) internal successors, (1796), 744 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:46,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1796 transitions. [2021-02-19 17:15:46,559 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1796 transitions. Word has length 22 [2021-02-19 17:15:46,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:46,560 INFO L480 AbstractCegarLoop]: Abstraction has 745 states and 1796 transitions. [2021-02-19 17:15:46,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:46,560 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1796 transitions. [2021-02-19 17:15:46,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:15:46,562 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:46,563 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:46,778 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-02-19 17:15:46,778 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:46,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:46,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1226360481, now seen corresponding path program 6 times [2021-02-19 17:15:46,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:46,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582342535] [2021-02-19 17:15:46,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:46,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:46,962 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:46,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582342535] [2021-02-19 17:15:46,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837782751] [2021-02-19 17:15:46,963 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 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 [2021-02-19 17:15:46,987 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:15:46,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:46,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:15:46,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:47,194 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:15:47,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:47,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-02-19 17:15:47,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991851491] [2021-02-19 17:15:47,195 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:15:47,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:47,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:15:47,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:15:47,197 INFO L87 Difference]: Start difference. First operand 745 states and 1796 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:47,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:47,884 INFO L93 Difference]: Finished difference Result 1425 states and 3333 transitions. [2021-02-19 17:15:47,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 17:15:47,885 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:15:47,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:47,895 INFO L225 Difference]: With dead ends: 1425 [2021-02-19 17:15:47,895 INFO L226 Difference]: Without dead ends: 1411 [2021-02-19 17:15:47,895 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:15:47,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1411 states. [2021-02-19 17:15:47,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1411 to 1030. [2021-02-19 17:15:47,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1030 states, 1029 states have (on average 2.445092322643343) internal successors, (2516), 1029 states have internal predecessors, (2516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:47,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1030 states to 1030 states and 2516 transitions. [2021-02-19 17:15:47,926 INFO L78 Accepts]: Start accepts. Automaton has 1030 states and 2516 transitions. Word has length 25 [2021-02-19 17:15:47,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:47,926 INFO L480 AbstractCegarLoop]: Abstraction has 1030 states and 2516 transitions. [2021-02-19 17:15:47,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:47,926 INFO L276 IsEmpty]: Start isEmpty. Operand 1030 states and 2516 transitions. [2021-02-19 17:15:47,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:15:47,929 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:47,929 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:48,138 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:48,138 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:48,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:48,138 INFO L82 PathProgramCache]: Analyzing trace with hash -382308948, now seen corresponding path program 7 times [2021-02-19 17:15:48,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:48,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301516629] [2021-02-19 17:15:48,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:48,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:48,174 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:15:48,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301516629] [2021-02-19 17:15:48,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364984252] [2021-02-19 17:15:48,174 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 17:15:48,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:48,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 17:15:48,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:48,249 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:15:48,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:48,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-02-19 17:15:48,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487570553] [2021-02-19 17:15:48,251 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 17:15:48,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:48,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 17:15:48,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-19 17:15:48,251 INFO L87 Difference]: Start difference. First operand 1030 states and 2516 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:48,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:48,305 INFO L93 Difference]: Finished difference Result 1306 states and 3010 transitions. [2021-02-19 17:15:48,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 17:15:48,306 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:15:48,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:48,310 INFO L225 Difference]: With dead ends: 1306 [2021-02-19 17:15:48,310 INFO L226 Difference]: Without dead ends: 1303 [2021-02-19 17:15:48,310 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:15:48,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1303 states. [2021-02-19 17:15:48,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1303 to 1033. [2021-02-19 17:15:48,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 1032 states have (on average 2.435077519379845) internal successors, (2513), 1032 states have internal predecessors, (2513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:48,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 2513 transitions. [2021-02-19 17:15:48,338 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 2513 transitions. Word has length 25 [2021-02-19 17:15:48,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:48,338 INFO L480 AbstractCegarLoop]: Abstraction has 1033 states and 2513 transitions. [2021-02-19 17:15:48,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:48,338 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 2513 transitions. [2021-02-19 17:15:48,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:15:48,340 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:48,340 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:48,558 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:48,558 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:48,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:48,558 INFO L82 PathProgramCache]: Analyzing trace with hash -866416048, now seen corresponding path program 8 times [2021-02-19 17:15:48,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:48,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764385815] [2021-02-19 17:15:48,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:48,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:48,596 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:15:48,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764385815] [2021-02-19 17:15:48,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690471538] [2021-02-19 17:15:48,596 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 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 [2021-02-19 17:15:48,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:15:48,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:48,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 17:15:48,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:48,656 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:15:48,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:48,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-02-19 17:15:48,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740158539] [2021-02-19 17:15:48,658 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 17:15:48,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:48,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 17:15:48,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-02-19 17:15:48,659 INFO L87 Difference]: Start difference. First operand 1033 states and 2513 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:48,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:48,715 INFO L93 Difference]: Finished difference Result 1948 states and 4632 transitions. [2021-02-19 17:15:48,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:15:48,715 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:15:48,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:48,722 INFO L225 Difference]: With dead ends: 1948 [2021-02-19 17:15:48,722 INFO L226 Difference]: Without dead ends: 1948 [2021-02-19 17:15:48,722 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:15:48,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1948 states. [2021-02-19 17:15:48,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1948 to 1621. [2021-02-19 17:15:48,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1620 states have (on average 2.504938271604938) internal successors, (4058), 1620 states have internal predecessors, (4058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:48,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 4058 transitions. [2021-02-19 17:15:48,778 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 4058 transitions. Word has length 25 [2021-02-19 17:15:48,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:48,778 INFO L480 AbstractCegarLoop]: Abstraction has 1621 states and 4058 transitions. [2021-02-19 17:15:48,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:48,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 4058 transitions. [2021-02-19 17:15:48,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:15:48,783 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:48,783 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:48,994 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-02-19 17:15:48,995 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:48,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:48,995 INFO L82 PathProgramCache]: Analyzing trace with hash -189361416, now seen corresponding path program 9 times [2021-02-19 17:15:48,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:48,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930696777] [2021-02-19 17:15:48,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:48,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:49,022 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:15:49,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930696777] [2021-02-19 17:15:49,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489682421] [2021-02-19 17:15:49,023 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 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 [2021-02-19 17:15:49,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 17:15:49,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:49,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 17:15:49,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:49,079 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:15:49,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:49,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-02-19 17:15:49,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392578605] [2021-02-19 17:15:49,080 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 17:15:49,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:49,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 17:15:49,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-02-19 17:15:49,081 INFO L87 Difference]: Start difference. First operand 1621 states and 4058 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:49,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:49,131 INFO L93 Difference]: Finished difference Result 1941 states and 4622 transitions. [2021-02-19 17:15:49,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 17:15:49,132 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:15:49,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:49,138 INFO L225 Difference]: With dead ends: 1941 [2021-02-19 17:15:49,138 INFO L226 Difference]: Without dead ends: 1938 [2021-02-19 17:15:49,138 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:15:49,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1938 states. [2021-02-19 17:15:49,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1938 to 1621. [2021-02-19 17:15:49,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1620 states have (on average 2.5) internal successors, (4050), 1620 states have internal predecessors, (4050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:49,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 4050 transitions. [2021-02-19 17:15:49,174 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 4050 transitions. Word has length 25 [2021-02-19 17:15:49,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:49,175 INFO L480 AbstractCegarLoop]: Abstraction has 1621 states and 4050 transitions. [2021-02-19 17:15:49,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:49,175 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 4050 transitions. [2021-02-19 17:15:49,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:15:49,177 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:49,177 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:49,398 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-02-19 17:15:49,399 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:49,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:49,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1826933872, now seen corresponding path program 10 times [2021-02-19 17:15:49,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:49,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046635459] [2021-02-19 17:15:49,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:49,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:49,436 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:15:49,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046635459] [2021-02-19 17:15:49,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680732556] [2021-02-19 17:15:49,436 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 17:15:49,452 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:15:49,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:49,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 17:15:49,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:49,502 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:15:49,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:49,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-02-19 17:15:49,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019514586] [2021-02-19 17:15:49,502 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:15:49,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:49,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:15:49,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:15:49,503 INFO L87 Difference]: Start difference. First operand 1621 states and 4050 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:49,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:49,567 INFO L93 Difference]: Finished difference Result 1932 states and 4596 transitions. [2021-02-19 17:15:49,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:15:49,567 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:15:49,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:49,574 INFO L225 Difference]: With dead ends: 1932 [2021-02-19 17:15:49,574 INFO L226 Difference]: Without dead ends: 1918 [2021-02-19 17:15:49,574 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:15:49,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2021-02-19 17:15:49,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1635. [2021-02-19 17:15:49,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1635 states, 1634 states have (on average 2.4871481028151776) internal successors, (4064), 1634 states have internal predecessors, (4064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:49,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1635 states to 1635 states and 4064 transitions. [2021-02-19 17:15:49,608 INFO L78 Accepts]: Start accepts. Automaton has 1635 states and 4064 transitions. Word has length 25 [2021-02-19 17:15:49,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:49,608 INFO L480 AbstractCegarLoop]: Abstraction has 1635 states and 4064 transitions. [2021-02-19 17:15:49,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:49,608 INFO L276 IsEmpty]: Start isEmpty. Operand 1635 states and 4064 transitions. [2021-02-19 17:15:49,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:15:49,610 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:49,610 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:49,831 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-02-19 17:15:49,831 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:49,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:49,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1540224473, now seen corresponding path program 11 times [2021-02-19 17:15:49,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:49,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32287431] [2021-02-19 17:15:49,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:49,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:50,018 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:50,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32287431] [2021-02-19 17:15:50,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261393159] [2021-02-19 17:15:50,019 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 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 [2021-02-19 17:15:50,035 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:15:50,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:50,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:15:50,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:50,211 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:15:50,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:50,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-02-19 17:15:50,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104956850] [2021-02-19 17:15:50,212 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:15:50,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:50,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:15:50,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:15:50,213 INFO L87 Difference]: Start difference. First operand 1635 states and 4064 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:50,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:50,876 INFO L93 Difference]: Finished difference Result 2667 states and 6496 transitions. [2021-02-19 17:15:50,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-02-19 17:15:50,877 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:15:50,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:50,886 INFO L225 Difference]: With dead ends: 2667 [2021-02-19 17:15:50,886 INFO L226 Difference]: Without dead ends: 2634 [2021-02-19 17:15:50,886 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=146, Invalid=910, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 17:15:50,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2634 states. [2021-02-19 17:15:50,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2634 to 2167. [2021-02-19 17:15:50,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2167 states, 2166 states have (on average 2.5203139427516157) internal successors, (5459), 2166 states have internal predecessors, (5459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:50,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2167 states to 2167 states and 5459 transitions. [2021-02-19 17:15:50,933 INFO L78 Accepts]: Start accepts. Automaton has 2167 states and 5459 transitions. Word has length 25 [2021-02-19 17:15:50,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:50,933 INFO L480 AbstractCegarLoop]: Abstraction has 2167 states and 5459 transitions. [2021-02-19 17:15:50,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:50,933 INFO L276 IsEmpty]: Start isEmpty. Operand 2167 states and 5459 transitions. [2021-02-19 17:15:50,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:15:50,936 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:50,936 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:51,150 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:51,150 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:51,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:51,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1137743521, now seen corresponding path program 12 times [2021-02-19 17:15:51,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:51,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178689576] [2021-02-19 17:15:51,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:51,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:51,302 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:51,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178689576] [2021-02-19 17:15:51,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168219667] [2021-02-19 17:15:51,302 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 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 [2021-02-19 17:15:51,322 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:15:51,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:51,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:15:51,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:51,476 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:15:51,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:51,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-02-19 17:15:51,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606016917] [2021-02-19 17:15:51,477 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:15:51,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:51,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:15:51,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:15:51,480 INFO L87 Difference]: Start difference. First operand 2167 states and 5459 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:52,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:52,129 INFO L93 Difference]: Finished difference Result 2799 states and 6877 transitions. [2021-02-19 17:15:52,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 17:15:52,130 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:15:52,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:52,140 INFO L225 Difference]: With dead ends: 2799 [2021-02-19 17:15:52,140 INFO L226 Difference]: Without dead ends: 2766 [2021-02-19 17:15:52,140 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:15:52,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2766 states. [2021-02-19 17:15:52,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2766 to 2353. [2021-02-19 17:15:52,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2353 states, 2352 states have (on average 2.5357142857142856) internal successors, (5964), 2352 states have internal predecessors, (5964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:52,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2353 states to 2353 states and 5964 transitions. [2021-02-19 17:15:52,190 INFO L78 Accepts]: Start accepts. Automaton has 2353 states and 5964 transitions. Word has length 25 [2021-02-19 17:15:52,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:52,190 INFO L480 AbstractCegarLoop]: Abstraction has 2353 states and 5964 transitions. [2021-02-19 17:15:52,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:52,191 INFO L276 IsEmpty]: Start isEmpty. Operand 2353 states and 5964 transitions. [2021-02-19 17:15:52,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:15:52,194 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:52,194 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:52,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-02-19 17:15:52,416 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:52,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:52,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1817635545, now seen corresponding path program 13 times [2021-02-19 17:15:52,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:52,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892976059] [2021-02-19 17:15:52,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:52,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:52,547 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:52,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892976059] [2021-02-19 17:15:52,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252793288] [2021-02-19 17:15:52,547 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 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 [2021-02-19 17:15:52,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:52,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:15:52,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:52,735 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:15:52,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:52,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-02-19 17:15:52,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770736862] [2021-02-19 17:15:52,736 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:15:52,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:52,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:15:52,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:15:52,736 INFO L87 Difference]: Start difference. First operand 2353 states and 5964 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:53,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:53,404 INFO L93 Difference]: Finished difference Result 3085 states and 7606 transitions. [2021-02-19 17:15:53,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 17:15:53,405 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:15:53,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:53,417 INFO L225 Difference]: With dead ends: 3085 [2021-02-19 17:15:53,417 INFO L226 Difference]: Without dead ends: 3052 [2021-02-19 17:15:53,418 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:15:53,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3052 states. [2021-02-19 17:15:53,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3052 to 2653. [2021-02-19 17:15:53,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2653 states, 2652 states have (on average 2.5448717948717947) internal successors, (6749), 2652 states have internal predecessors, (6749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:53,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2653 states to 2653 states and 6749 transitions. [2021-02-19 17:15:53,475 INFO L78 Accepts]: Start accepts. Automaton has 2653 states and 6749 transitions. Word has length 25 [2021-02-19 17:15:53,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:53,475 INFO L480 AbstractCegarLoop]: Abstraction has 2653 states and 6749 transitions. [2021-02-19 17:15:53,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:53,475 INFO L276 IsEmpty]: Start isEmpty. Operand 2653 states and 6749 transitions. [2021-02-19 17:15:53,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:15:53,479 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:53,479 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:53,694 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:53,694 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:53,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:53,694 INFO L82 PathProgramCache]: Analyzing trace with hash -2137658073, now seen corresponding path program 14 times [2021-02-19 17:15:53,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:53,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104636201] [2021-02-19 17:15:53,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:53,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:53,822 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:53,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104636201] [2021-02-19 17:15:53,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056906262] [2021-02-19 17:15:53,823 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 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 [2021-02-19 17:15:53,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:15:53,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:53,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:15:53,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:54,022 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:15:54,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:54,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-02-19 17:15:54,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239204603] [2021-02-19 17:15:54,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:15:54,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:54,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:15:54,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:15:54,023 INFO L87 Difference]: Start difference. First operand 2653 states and 6749 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:54,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:54,644 INFO L93 Difference]: Finished difference Result 3403 states and 8493 transitions. [2021-02-19 17:15:54,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 17:15:54,644 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:15:54,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:54,649 INFO L225 Difference]: With dead ends: 3403 [2021-02-19 17:15:54,649 INFO L226 Difference]: Without dead ends: 3367 [2021-02-19 17:15:54,649 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2021-02-19 17:15:54,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3367 states. [2021-02-19 17:15:54,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3367 to 2970. [2021-02-19 17:15:54,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2970 states, 2969 states have (on average 2.560794880431122) internal successors, (7603), 2969 states have internal predecessors, (7603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:54,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2970 states to 2970 states and 7603 transitions. [2021-02-19 17:15:54,703 INFO L78 Accepts]: Start accepts. Automaton has 2970 states and 7603 transitions. Word has length 25 [2021-02-19 17:15:54,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:54,703 INFO L480 AbstractCegarLoop]: Abstraction has 2970 states and 7603 transitions. [2021-02-19 17:15:54,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:54,704 INFO L276 IsEmpty]: Start isEmpty. Operand 2970 states and 7603 transitions. [2021-02-19 17:15:54,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:15:54,708 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:54,708 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:54,927 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:54,928 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:54,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:54,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1209874573, now seen corresponding path program 15 times [2021-02-19 17:15:54,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:54,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009818958] [2021-02-19 17:15:54,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:54,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:55,076 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:55,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009818958] [2021-02-19 17:15:55,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947589767] [2021-02-19 17:15:55,077 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 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 [2021-02-19 17:15:55,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:15:55,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:55,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:15:55,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:55,265 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:15:55,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:55,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-02-19 17:15:55,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973371127] [2021-02-19 17:15:55,267 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:15:55,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:55,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:15:55,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:15:55,268 INFO L87 Difference]: Start difference. First operand 2970 states and 7603 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:55,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:55,765 INFO L93 Difference]: Finished difference Result 3443 states and 8662 transitions. [2021-02-19 17:15:55,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 17:15:55,765 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:15:55,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:55,769 INFO L225 Difference]: With dead ends: 3443 [2021-02-19 17:15:55,769 INFO L226 Difference]: Without dead ends: 3410 [2021-02-19 17:15:55,770 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:15:55,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3410 states. [2021-02-19 17:15:55,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3410 to 3167. [2021-02-19 17:15:55,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3167 states, 3166 states have (on average 2.5634870499052433) internal successors, (8116), 3166 states have internal predecessors, (8116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:55,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3167 states to 3167 states and 8116 transitions. [2021-02-19 17:15:55,824 INFO L78 Accepts]: Start accepts. Automaton has 3167 states and 8116 transitions. Word has length 25 [2021-02-19 17:15:55,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:55,824 INFO L480 AbstractCegarLoop]: Abstraction has 3167 states and 8116 transitions. [2021-02-19 17:15:55,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:55,824 INFO L276 IsEmpty]: Start isEmpty. Operand 3167 states and 8116 transitions. [2021-02-19 17:15:55,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:15:55,829 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:55,829 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:56,050 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-02-19 17:15:56,050 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:56,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:56,051 INFO L82 PathProgramCache]: Analyzing trace with hash 149096483, now seen corresponding path program 16 times [2021-02-19 17:15:56,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:56,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388453751] [2021-02-19 17:15:56,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:56,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:56,194 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:56,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388453751] [2021-02-19 17:15:56,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310963250] [2021-02-19 17:15:56,195 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 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 [2021-02-19 17:15:56,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:15:56,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:56,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:15:56,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:56,358 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:15:56,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:56,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-02-19 17:15:56,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469119385] [2021-02-19 17:15:56,359 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:15:56,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:56,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:15:56,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:15:56,359 INFO L87 Difference]: Start difference. First operand 3167 states and 8116 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:56,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:56,811 INFO L93 Difference]: Finished difference Result 3520 states and 8898 transitions. [2021-02-19 17:15:56,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:15:56,811 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:15:56,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:56,816 INFO L225 Difference]: With dead ends: 3520 [2021-02-19 17:15:56,816 INFO L226 Difference]: Without dead ends: 3507 [2021-02-19 17:15:56,817 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:15:56,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3507 states. [2021-02-19 17:15:56,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3507 to 3303. [2021-02-19 17:15:56,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.562992125984252) internal successors, (8463), 3302 states have internal predecessors, (8463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:56,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 8463 transitions. [2021-02-19 17:15:56,894 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 8463 transitions. Word has length 25 [2021-02-19 17:15:56,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:56,895 INFO L480 AbstractCegarLoop]: Abstraction has 3303 states and 8463 transitions. [2021-02-19 17:15:56,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:56,895 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 8463 transitions. [2021-02-19 17:15:56,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:15:56,899 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:56,899 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:57,114 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:57,114 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:57,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:57,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1397933113, now seen corresponding path program 17 times [2021-02-19 17:15:57,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:57,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481466524] [2021-02-19 17:15:57,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:57,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:57,260 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:57,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481466524] [2021-02-19 17:15:57,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235426449] [2021-02-19 17:15:57,260 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 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 [2021-02-19 17:15:57,290 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:15:57,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:57,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:15:57,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:57,433 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:15:57,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:57,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-02-19 17:15:57,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604564628] [2021-02-19 17:15:57,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:15:57,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:57,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:15:57,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:15:57,434 INFO L87 Difference]: Start difference. First operand 3303 states and 8463 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:57,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:57,899 INFO L93 Difference]: Finished difference Result 3850 states and 9692 transitions. [2021-02-19 17:15:57,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 17:15:57,899 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:15:57,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:57,904 INFO L225 Difference]: With dead ends: 3850 [2021-02-19 17:15:57,904 INFO L226 Difference]: Without dead ends: 3817 [2021-02-19 17:15:57,905 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:15:57,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3817 states. [2021-02-19 17:15:57,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3817 to 3492. [2021-02-19 17:15:57,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3492 states, 3491 states have (on average 2.5665998281294757) internal successors, (8960), 3491 states have internal predecessors, (8960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:57,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3492 states to 3492 states and 8960 transitions. [2021-02-19 17:15:57,961 INFO L78 Accepts]: Start accepts. Automaton has 3492 states and 8960 transitions. Word has length 25 [2021-02-19 17:15:57,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:57,961 INFO L480 AbstractCegarLoop]: Abstraction has 3492 states and 8960 transitions. [2021-02-19 17:15:57,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:57,961 INFO L276 IsEmpty]: Start isEmpty. Operand 3492 states and 8960 transitions. [2021-02-19 17:15:57,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 17:15:57,966 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:57,966 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:58,187 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-02-19 17:15:58,188 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:58,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:58,188 INFO L82 PathProgramCache]: Analyzing trace with hash 942743250, now seen corresponding path program 3 times [2021-02-19 17:15:58,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:58,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588687303] [2021-02-19 17:15:58,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:58,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:58,321 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:15:58,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588687303] [2021-02-19 17:15:58,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081901968] [2021-02-19 17:15:58,321 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 [2021-02-19 17:15:58,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:15:58,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:58,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:15:58,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:58,432 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:15:58,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:58,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-02-19 17:15:58,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133951401] [2021-02-19 17:15:58,433 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:15:58,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:58,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:15:58,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:15:58,433 INFO L87 Difference]: Start difference. First operand 3492 states and 8960 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 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) [2021-02-19 17:15:58,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:58,647 INFO L93 Difference]: Finished difference Result 3385 states and 8558 transitions. [2021-02-19 17:15:58,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:15:58,648 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 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 26 [2021-02-19 17:15:58,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:58,650 INFO L225 Difference]: With dead ends: 3385 [2021-02-19 17:15:58,650 INFO L226 Difference]: Without dead ends: 3093 [2021-02-19 17:15:58,651 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:15:58,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3093 states. [2021-02-19 17:15:58,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3093 to 3088. [2021-02-19 17:15:58,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3088 states, 3087 states have (on average 2.557823129251701) internal successors, (7896), 3087 states have internal predecessors, (7896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:58,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3088 states to 3088 states and 7896 transitions. [2021-02-19 17:15:58,695 INFO L78 Accepts]: Start accepts. Automaton has 3088 states and 7896 transitions. Word has length 26 [2021-02-19 17:15:58,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:58,696 INFO L480 AbstractCegarLoop]: Abstraction has 3088 states and 7896 transitions. [2021-02-19 17:15:58,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 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) [2021-02-19 17:15:58,696 INFO L276 IsEmpty]: Start isEmpty. Operand 3088 states and 7896 transitions. [2021-02-19 17:15:58,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 17:15:58,699 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:58,700 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:58,914 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-02-19 17:15:58,914 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:58,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:58,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1501046455, now seen corresponding path program 18 times [2021-02-19 17:15:58,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:58,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317567280] [2021-02-19 17:15:58,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:58,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:59,090 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:59,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317567280] [2021-02-19 17:15:59,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518790791] [2021-02-19 17:15:59,090 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:59,108 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:15:59,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:59,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:15:59,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:59,331 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:15:59,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:59,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-02-19 17:15:59,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951685008] [2021-02-19 17:15:59,332 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 17:15:59,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:59,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 17:15:59,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:15:59,333 INFO L87 Difference]: Start difference. First operand 3088 states and 7896 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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) [2021-02-19 17:16:00,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:00,134 INFO L93 Difference]: Finished difference Result 3805 states and 9503 transitions. [2021-02-19 17:16:00,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-02-19 17:16:00,134 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 28 [2021-02-19 17:16:00,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:00,138 INFO L225 Difference]: With dead ends: 3805 [2021-02-19 17:16:00,138 INFO L226 Difference]: Without dead ends: 3772 [2021-02-19 17:16:00,139 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 17:16:00,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3772 states. [2021-02-19 17:16:00,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3772 to 3327. [2021-02-19 17:16:00,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3327 states, 3326 states have (on average 2.5673481659651234) internal successors, (8539), 3326 states have internal predecessors, (8539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:00,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3327 states to 3327 states and 8539 transitions. [2021-02-19 17:16:00,194 INFO L78 Accepts]: Start accepts. Automaton has 3327 states and 8539 transitions. Word has length 28 [2021-02-19 17:16:00,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:00,194 INFO L480 AbstractCegarLoop]: Abstraction has 3327 states and 8539 transitions. [2021-02-19 17:16:00,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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) [2021-02-19 17:16:00,194 INFO L276 IsEmpty]: Start isEmpty. Operand 3327 states and 8539 transitions. [2021-02-19 17:16:00,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 17:16:00,198 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:00,198 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:00,418 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:00,418 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:00,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:00,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1507080837, now seen corresponding path program 19 times [2021-02-19 17:16:00,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:00,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854175218] [2021-02-19 17:16:00,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:00,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:00,592 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:00,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854175218] [2021-02-19 17:16:00,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757378475] [2021-02-19 17:16:00,592 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:00,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:00,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:16:00,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:00,816 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:00,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:00,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-02-19 17:16:00,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60855175] [2021-02-19 17:16:00,817 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 17:16:00,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:00,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 17:16:00,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:16:00,818 INFO L87 Difference]: Start difference. First operand 3327 states and 8539 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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) [2021-02-19 17:16:01,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:01,546 INFO L93 Difference]: Finished difference Result 3901 states and 9836 transitions. [2021-02-19 17:16:01,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-02-19 17:16:01,546 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 28 [2021-02-19 17:16:01,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:01,551 INFO L225 Difference]: With dead ends: 3901 [2021-02-19 17:16:01,551 INFO L226 Difference]: Without dead ends: 3868 [2021-02-19 17:16:01,551 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=140, Invalid=1050, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 17:16:01,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3868 states. [2021-02-19 17:16:01,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3868 to 3566. [2021-02-19 17:16:01,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3566 states, 3565 states have (on average 2.571669004207574) internal successors, (9168), 3565 states have internal predecessors, (9168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:01,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3566 states to 3566 states and 9168 transitions. [2021-02-19 17:16:01,607 INFO L78 Accepts]: Start accepts. Automaton has 3566 states and 9168 transitions. Word has length 28 [2021-02-19 17:16:01,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:01,607 INFO L480 AbstractCegarLoop]: Abstraction has 3566 states and 9168 transitions. [2021-02-19 17:16:01,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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) [2021-02-19 17:16:01,607 INFO L276 IsEmpty]: Start isEmpty. Operand 3566 states and 9168 transitions. [2021-02-19 17:16:01,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 17:16:01,612 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:01,612 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:01,826 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-02-19 17:16:01,826 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:01,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:01,826 INFO L82 PathProgramCache]: Analyzing trace with hash -258244207, now seen corresponding path program 20 times [2021-02-19 17:16:01,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:01,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932392331] [2021-02-19 17:16:01,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:01,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:02,028 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:02,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932392331] [2021-02-19 17:16:02,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115985415] [2021-02-19 17:16:02,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:02,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:16:02,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:02,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:16:02,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:02,270 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:02,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:02,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-02-19 17:16:02,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802584358] [2021-02-19 17:16:02,271 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 17:16:02,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:02,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 17:16:02,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:16:02,272 INFO L87 Difference]: Start difference. First operand 3566 states and 9168 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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) [2021-02-19 17:16:03,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:03,149 INFO L93 Difference]: Finished difference Result 4372 states and 10996 transitions. [2021-02-19 17:16:03,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-02-19 17:16:03,149 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 28 [2021-02-19 17:16:03,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:03,153 INFO L225 Difference]: With dead ends: 4372 [2021-02-19 17:16:03,153 INFO L226 Difference]: Without dead ends: 4339 [2021-02-19 17:16:03,153 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=158, Invalid=1248, Unknown=0, NotChecked=0, Total=1406 [2021-02-19 17:16:03,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4339 states. [2021-02-19 17:16:03,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4339 to 3961. [2021-02-19 17:16:03,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3961 states, 3960 states have (on average 2.5717171717171716) internal successors, (10184), 3960 states have internal predecessors, (10184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:03,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3961 states to 3961 states and 10184 transitions. [2021-02-19 17:16:03,207 INFO L78 Accepts]: Start accepts. Automaton has 3961 states and 10184 transitions. Word has length 28 [2021-02-19 17:16:03,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:03,208 INFO L480 AbstractCegarLoop]: Abstraction has 3961 states and 10184 transitions. [2021-02-19 17:16:03,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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) [2021-02-19 17:16:03,208 INFO L276 IsEmpty]: Start isEmpty. Operand 3961 states and 10184 transitions. [2021-02-19 17:16:03,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:16:03,213 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:03,213 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:03,425 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:03,426 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:03,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:03,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1383192995, now seen corresponding path program 4 times [2021-02-19 17:16:03,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:03,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849527730] [2021-02-19 17:16:03,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:03,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:03,462 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:03,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849527730] [2021-02-19 17:16:03,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383968092] [2021-02-19 17:16:03,462 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:03,482 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:16:03,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:03,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:16:03,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:03,533 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:03,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:03,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-02-19 17:16:03,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915626461] [2021-02-19 17:16:03,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:16:03,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:03,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:16:03,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:16:03,534 INFO L87 Difference]: Start difference. First operand 3961 states and 10184 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:03,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:03,636 INFO L93 Difference]: Finished difference Result 4649 states and 11665 transitions. [2021-02-19 17:16:03,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:16:03,636 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 17:16:03,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:03,640 INFO L225 Difference]: With dead ends: 4649 [2021-02-19 17:16:03,640 INFO L226 Difference]: Without dead ends: 4649 [2021-02-19 17:16:03,640 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:16:03,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4649 states. [2021-02-19 17:16:03,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4649 to 4178. [2021-02-19 17:16:03,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4178 states, 4177 states have (on average 2.573617428776634) internal successors, (10750), 4177 states have internal predecessors, (10750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:03,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4178 states to 4178 states and 10750 transitions. [2021-02-19 17:16:03,692 INFO L78 Accepts]: Start accepts. Automaton has 4178 states and 10750 transitions. Word has length 29 [2021-02-19 17:16:03,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:03,692 INFO L480 AbstractCegarLoop]: Abstraction has 4178 states and 10750 transitions. [2021-02-19 17:16:03,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:03,692 INFO L276 IsEmpty]: Start isEmpty. Operand 4178 states and 10750 transitions. [2021-02-19 17:16:03,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:16:03,697 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:03,698 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:03,913 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-02-19 17:16:03,913 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:03,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:03,913 INFO L82 PathProgramCache]: Analyzing trace with hash -417070860, now seen corresponding path program 21 times [2021-02-19 17:16:03,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:03,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676288360] [2021-02-19 17:16:03,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:03,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:03,956 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:16:03,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676288360] [2021-02-19 17:16:03,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971035247] [2021-02-19 17:16:03,957 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:03,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:16:03,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:03,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2021-02-19 17:16:03,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:04,036 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:16:04,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:04,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-02-19 17:16:04,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151175538] [2021-02-19 17:16:04,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:16:04,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:04,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:16:04,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:16:04,037 INFO L87 Difference]: Start difference. First operand 4178 states and 10750 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:04,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:04,134 INFO L93 Difference]: Finished difference Result 3822 states and 9413 transitions. [2021-02-19 17:16:04,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:16:04,134 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 17:16:04,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:04,138 INFO L225 Difference]: With dead ends: 3822 [2021-02-19 17:16:04,138 INFO L226 Difference]: Without dead ends: 3822 [2021-02-19 17:16:04,138 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:16:04,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3822 states. [2021-02-19 17:16:04,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3822 to 3081. [2021-02-19 17:16:04,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3081 states, 3080 states have (on average 2.523701298701299) internal successors, (7773), 3080 states have internal predecessors, (7773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:04,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3081 states to 3081 states and 7773 transitions. [2021-02-19 17:16:04,173 INFO L78 Accepts]: Start accepts. Automaton has 3081 states and 7773 transitions. Word has length 29 [2021-02-19 17:16:04,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:04,173 INFO L480 AbstractCegarLoop]: Abstraction has 3081 states and 7773 transitions. [2021-02-19 17:16:04,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:04,173 INFO L276 IsEmpty]: Start isEmpty. Operand 3081 states and 7773 transitions. [2021-02-19 17:16:04,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:16:04,176 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:04,176 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:04,389 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-02-19 17:16:04,390 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:04,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:04,390 INFO L82 PathProgramCache]: Analyzing trace with hash -196967365, now seen corresponding path program 22 times [2021-02-19 17:16:04,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:04,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813371409] [2021-02-19 17:16:04,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:04,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:04,414 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:04,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813371409] [2021-02-19 17:16:04,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799191577] [2021-02-19 17:16:04,414 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:16:04,444 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:16:04,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:04,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 17:16:04,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:04,505 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:04,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:04,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-02-19 17:16:04,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068143195] [2021-02-19 17:16:04,506 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:16:04,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:04,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:16:04,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:16:04,507 INFO L87 Difference]: Start difference. First operand 3081 states and 7773 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:04,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:04,572 INFO L93 Difference]: Finished difference Result 3755 states and 9365 transitions. [2021-02-19 17:16:04,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:16:04,573 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 17:16:04,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:04,576 INFO L225 Difference]: With dead ends: 3755 [2021-02-19 17:16:04,576 INFO L226 Difference]: Without dead ends: 3743 [2021-02-19 17:16:04,576 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:16:04,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3743 states. [2021-02-19 17:16:04,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3743 to 3644. [2021-02-19 17:16:04,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3644 states, 3643 states have (on average 2.4888827889102387) internal successors, (9067), 3643 states have internal predecessors, (9067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:04,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3644 states to 3644 states and 9067 transitions. [2021-02-19 17:16:04,620 INFO L78 Accepts]: Start accepts. Automaton has 3644 states and 9067 transitions. Word has length 29 [2021-02-19 17:16:04,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:04,620 INFO L480 AbstractCegarLoop]: Abstraction has 3644 states and 9067 transitions. [2021-02-19 17:16:04,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:04,620 INFO L276 IsEmpty]: Start isEmpty. Operand 3644 states and 9067 transitions. [2021-02-19 17:16:04,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:16:04,624 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:04,624 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:04,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:04,844 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:04,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:04,844 INFO L82 PathProgramCache]: Analyzing trace with hash 2073432191, now seen corresponding path program 23 times [2021-02-19 17:16:04,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:04,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123635855] [2021-02-19 17:16:04,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:04,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:04,876 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:04,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123635855] [2021-02-19 17:16:04,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229534801] [2021-02-19 17:16:04,877 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:16:04,898 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:16:04,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:04,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 17:16:04,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:04,937 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:16:04,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:04,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-02-19 17:16:04,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599543170] [2021-02-19 17:16:04,938 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 17:16:04,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:04,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 17:16:04,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-02-19 17:16:04,938 INFO L87 Difference]: Start difference. First operand 3644 states and 9067 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:04,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:04,985 INFO L93 Difference]: Finished difference Result 3731 states and 9053 transitions. [2021-02-19 17:16:04,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:16:04,986 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 17:16:04,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:04,988 INFO L225 Difference]: With dead ends: 3731 [2021-02-19 17:16:04,988 INFO L226 Difference]: Without dead ends: 3731 [2021-02-19 17:16:04,989 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:16:04,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3731 states. [2021-02-19 17:16:05,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3731 to 3636. [2021-02-19 17:16:05,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3636 states, 3635 states have (on average 2.4434662998624486) internal successors, (8882), 3635 states have internal predecessors, (8882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:05,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3636 states to 3636 states and 8882 transitions. [2021-02-19 17:16:05,032 INFO L78 Accepts]: Start accepts. Automaton has 3636 states and 8882 transitions. Word has length 29 [2021-02-19 17:16:05,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:05,032 INFO L480 AbstractCegarLoop]: Abstraction has 3636 states and 8882 transitions. [2021-02-19 17:16:05,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:05,033 INFO L276 IsEmpty]: Start isEmpty. Operand 3636 states and 8882 transitions. [2021-02-19 17:16:05,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:16:05,036 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:05,036 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:05,255 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:05,255 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:05,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:05,256 INFO L82 PathProgramCache]: Analyzing trace with hash -321643641, now seen corresponding path program 24 times [2021-02-19 17:16:05,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:05,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476372299] [2021-02-19 17:16:05,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:05,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:05,281 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:05,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476372299] [2021-02-19 17:16:05,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921580280] [2021-02-19 17:16:05,281 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:05,299 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:16:05,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:05,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 17:16:05,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:05,336 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:16:05,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:05,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-02-19 17:16:05,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107280673] [2021-02-19 17:16:05,337 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 17:16:05,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:05,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 17:16:05,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-19 17:16:05,338 INFO L87 Difference]: Start difference. First operand 3636 states and 8882 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:05,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:05,393 INFO L93 Difference]: Finished difference Result 3810 states and 9235 transitions. [2021-02-19 17:16:05,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 17:16:05,393 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 17:16:05,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:05,396 INFO L225 Difference]: With dead ends: 3810 [2021-02-19 17:16:05,396 INFO L226 Difference]: Without dead ends: 3808 [2021-02-19 17:16:05,396 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:16:05,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3808 states. [2021-02-19 17:16:05,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3808 to 3714. [2021-02-19 17:16:05,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3714 states, 3713 states have (on average 2.4368435227578775) internal successors, (9048), 3713 states have internal predecessors, (9048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:05,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3714 states to 3714 states and 9048 transitions. [2021-02-19 17:16:05,441 INFO L78 Accepts]: Start accepts. Automaton has 3714 states and 9048 transitions. Word has length 29 [2021-02-19 17:16:05,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:05,441 INFO L480 AbstractCegarLoop]: Abstraction has 3714 states and 9048 transitions. [2021-02-19 17:16:05,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:05,441 INFO L276 IsEmpty]: Start isEmpty. Operand 3714 states and 9048 transitions. [2021-02-19 17:16:05,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:16:05,445 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:05,445 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:05,657 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-02-19 17:16:05,658 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:05,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:05,658 INFO L82 PathProgramCache]: Analyzing trace with hash -727011381, now seen corresponding path program 25 times [2021-02-19 17:16:05,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:05,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681383367] [2021-02-19 17:16:05,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:05,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:05,682 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:05,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681383367] [2021-02-19 17:16:05,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968887288] [2021-02-19 17:16:05,682 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:05,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:05,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 17:16:05,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:05,750 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:16:05,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:05,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-02-19 17:16:05,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57333947] [2021-02-19 17:16:05,751 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 17:16:05,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:05,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 17:16:05,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-19 17:16:05,751 INFO L87 Difference]: Start difference. First operand 3714 states and 9048 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:05,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:05,817 INFO L93 Difference]: Finished difference Result 3976 states and 9563 transitions. [2021-02-19 17:16:05,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:16:05,817 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 17:16:05,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:05,820 INFO L225 Difference]: With dead ends: 3976 [2021-02-19 17:16:05,820 INFO L226 Difference]: Without dead ends: 3973 [2021-02-19 17:16:05,820 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:16:05,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3973 states. [2021-02-19 17:16:05,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3973 to 3873. [2021-02-19 17:16:05,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3873 states, 3872 states have (on average 2.424586776859504) internal successors, (9388), 3872 states have internal predecessors, (9388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:05,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3873 states to 3873 states and 9388 transitions. [2021-02-19 17:16:05,862 INFO L78 Accepts]: Start accepts. Automaton has 3873 states and 9388 transitions. Word has length 29 [2021-02-19 17:16:05,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:05,862 INFO L480 AbstractCegarLoop]: Abstraction has 3873 states and 9388 transitions. [2021-02-19 17:16:05,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:05,863 INFO L276 IsEmpty]: Start isEmpty. Operand 3873 states and 9388 transitions. [2021-02-19 17:16:05,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:16:05,867 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:05,867 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:06,082 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:06,082 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:06,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:06,082 INFO L82 PathProgramCache]: Analyzing trace with hash -261697339, now seen corresponding path program 26 times [2021-02-19 17:16:06,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:06,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096317733] [2021-02-19 17:16:06,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:06,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:06,105 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:06,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096317733] [2021-02-19 17:16:06,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85442161] [2021-02-19 17:16:06,105 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:16:06,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:16:06,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:06,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 17:16:06,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:06,183 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:06,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:06,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-02-19 17:16:06,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142064472] [2021-02-19 17:16:06,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:16:06,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:06,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:16:06,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:16:06,184 INFO L87 Difference]: Start difference. First operand 3873 states and 9388 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:06,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:06,278 INFO L93 Difference]: Finished difference Result 3970 states and 9396 transitions. [2021-02-19 17:16:06,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:16:06,278 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 17:16:06,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:06,283 INFO L225 Difference]: With dead ends: 3970 [2021-02-19 17:16:06,283 INFO L226 Difference]: Without dead ends: 3967 [2021-02-19 17:16:06,283 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:16:06,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3967 states. [2021-02-19 17:16:06,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3967 to 3722. [2021-02-19 17:16:06,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3722 states, 3721 states have (on average 2.3931738779897875) internal successors, (8905), 3721 states have internal predecessors, (8905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:06,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3722 states to 3722 states and 8905 transitions. [2021-02-19 17:16:06,328 INFO L78 Accepts]: Start accepts. Automaton has 3722 states and 8905 transitions. Word has length 29 [2021-02-19 17:16:06,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:06,328 INFO L480 AbstractCegarLoop]: Abstraction has 3722 states and 8905 transitions. [2021-02-19 17:16:06,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:06,328 INFO L276 IsEmpty]: Start isEmpty. Operand 3722 states and 8905 transitions. [2021-02-19 17:16:06,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 17:16:06,332 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:06,332 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:06,553 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-02-19 17:16:06,553 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:06,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:06,553 INFO L82 PathProgramCache]: Analyzing trace with hash -994769569, now seen corresponding path program 27 times [2021-02-19 17:16:06,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:06,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517013327] [2021-02-19 17:16:06,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:06,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:06,723 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:16:06,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517013327] [2021-02-19 17:16:06,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905966906] [2021-02-19 17:16:06,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:16:06,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-02-19 17:16:06,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:06,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 17:16:06,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:07,024 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:07,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:07,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-02-19 17:16:07,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044160074] [2021-02-19 17:16:07,025 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 17:16:07,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:07,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 17:16:07,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:16:07,026 INFO L87 Difference]: Start difference. First operand 3722 states and 8905 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:08,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:08,198 INFO L93 Difference]: Finished difference Result 4929 states and 11573 transitions. [2021-02-19 17:16:08,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-02-19 17:16:08,198 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-02-19 17:16:08,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:08,202 INFO L225 Difference]: With dead ends: 4929 [2021-02-19 17:16:08,202 INFO L226 Difference]: Without dead ends: 4855 [2021-02-19 17:16:08,203 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=257, Invalid=2193, Unknown=0, NotChecked=0, Total=2450 [2021-02-19 17:16:08,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4855 states. [2021-02-19 17:16:08,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4855 to 4204. [2021-02-19 17:16:08,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4204 states, 4203 states have (on average 2.3925767309064954) internal successors, (10056), 4203 states have internal predecessors, (10056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:08,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4204 states to 4204 states and 10056 transitions. [2021-02-19 17:16:08,250 INFO L78 Accepts]: Start accepts. Automaton has 4204 states and 10056 transitions. Word has length 31 [2021-02-19 17:16:08,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:08,250 INFO L480 AbstractCegarLoop]: Abstraction has 4204 states and 10056 transitions. [2021-02-19 17:16:08,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:08,250 INFO L276 IsEmpty]: Start isEmpty. Operand 4204 states and 10056 transitions. [2021-02-19 17:16:08,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 17:16:08,254 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:08,254 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:08,475 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-02-19 17:16:08,475 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:08,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:08,475 INFO L82 PathProgramCache]: Analyzing trace with hash -2068056537, now seen corresponding path program 28 times [2021-02-19 17:16:08,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:08,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98401101] [2021-02-19 17:16:08,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:08,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:08,631 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:16:08,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98401101] [2021-02-19 17:16:08,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2527480] [2021-02-19 17:16:08,631 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:08,653 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:16:08,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:08,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 17:16:08,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:08,931 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:08,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:08,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-02-19 17:16:08,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444978887] [2021-02-19 17:16:08,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 17:16:08,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:08,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 17:16:08,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:16:08,932 INFO L87 Difference]: Start difference. First operand 4204 states and 10056 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:10,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:10,062 INFO L93 Difference]: Finished difference Result 5234 states and 12282 transitions. [2021-02-19 17:16:10,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-02-19 17:16:10,063 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-02-19 17:16:10,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:10,067 INFO L225 Difference]: With dead ends: 5234 [2021-02-19 17:16:10,067 INFO L226 Difference]: Without dead ends: 5194 [2021-02-19 17:16:10,067 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=204, Invalid=1688, Unknown=0, NotChecked=0, Total=1892 [2021-02-19 17:16:10,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5194 states. [2021-02-19 17:16:10,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5194 to 4469. [2021-02-19 17:16:10,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4469 states, 4468 states have (on average 2.3983885407341092) internal successors, (10716), 4468 states have internal predecessors, (10716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:10,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4469 states to 4469 states and 10716 transitions. [2021-02-19 17:16:10,105 INFO L78 Accepts]: Start accepts. Automaton has 4469 states and 10716 transitions. Word has length 31 [2021-02-19 17:16:10,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:10,105 INFO L480 AbstractCegarLoop]: Abstraction has 4469 states and 10716 transitions. [2021-02-19 17:16:10,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:10,105 INFO L276 IsEmpty]: Start isEmpty. Operand 4469 states and 10716 transitions. [2021-02-19 17:16:10,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 17:16:10,109 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:10,109 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:10,309 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-02-19 17:16:10,309 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:10,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:10,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1906888231, now seen corresponding path program 29 times [2021-02-19 17:16:10,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:10,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663278194] [2021-02-19 17:16:10,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:10,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:10,443 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:16:10,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663278194] [2021-02-19 17:16:10,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470332678] [2021-02-19 17:16:10,443 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:16:10,469 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-02-19 17:16:10,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:10,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 17:16:10,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:10,710 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:10,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:10,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-02-19 17:16:10,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739720176] [2021-02-19 17:16:10,711 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 17:16:10,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:10,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 17:16:10,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:16:10,711 INFO L87 Difference]: Start difference. First operand 4469 states and 10716 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 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) [2021-02-19 17:16:11,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:11,879 INFO L93 Difference]: Finished difference Result 5435 states and 12809 transitions. [2021-02-19 17:16:11,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-02-19 17:16:11,879 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 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 31 [2021-02-19 17:16:11,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:11,884 INFO L225 Difference]: With dead ends: 5435 [2021-02-19 17:16:11,884 INFO L226 Difference]: Without dead ends: 5402 [2021-02-19 17:16:11,885 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=249, Invalid=2201, Unknown=0, NotChecked=0, Total=2450 [2021-02-19 17:16:11,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5402 states. [2021-02-19 17:16:11,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5402 to 4799. [2021-02-19 17:16:11,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4799 states, 4798 states have (on average 2.4022509378907877) internal successors, (11526), 4798 states have internal predecessors, (11526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:11,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4799 states to 4799 states and 11526 transitions. [2021-02-19 17:16:11,928 INFO L78 Accepts]: Start accepts. Automaton has 4799 states and 11526 transitions. Word has length 31 [2021-02-19 17:16:11,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:11,928 INFO L480 AbstractCegarLoop]: Abstraction has 4799 states and 11526 transitions. [2021-02-19 17:16:11,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 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) [2021-02-19 17:16:11,929 INFO L276 IsEmpty]: Start isEmpty. Operand 4799 states and 11526 transitions. [2021-02-19 17:16:11,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 17:16:11,933 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:11,933 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:12,147 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-02-19 17:16:12,147 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:12,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:12,147 INFO L82 PathProgramCache]: Analyzing trace with hash 959453581, now seen corresponding path program 30 times [2021-02-19 17:16:12,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:12,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619111935] [2021-02-19 17:16:12,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:12,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:12,303 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:16:12,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619111935] [2021-02-19 17:16:12,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028927230] [2021-02-19 17:16:12,303 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:12,329 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-02-19 17:16:12,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:12,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 17:16:12,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:12,606 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:12,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:12,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-02-19 17:16:12,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828222101] [2021-02-19 17:16:12,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 17:16:12,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:12,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 17:16:12,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:16:12,607 INFO L87 Difference]: Start difference. First operand 4799 states and 11526 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:13,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:13,499 INFO L93 Difference]: Finished difference Result 5530 states and 13106 transitions. [2021-02-19 17:16:13,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-02-19 17:16:13,499 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-02-19 17:16:13,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:13,504 INFO L225 Difference]: With dead ends: 5530 [2021-02-19 17:16:13,504 INFO L226 Difference]: Without dead ends: 5486 [2021-02-19 17:16:13,505 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=174, Invalid=1548, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 17:16:13,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5486 states. [2021-02-19 17:16:13,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5486 to 5052. [2021-02-19 17:16:13,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5052 states, 5051 states have (on average 2.404474361512572) internal successors, (12145), 5051 states have internal predecessors, (12145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:13,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5052 states to 5052 states and 12145 transitions. [2021-02-19 17:16:13,568 INFO L78 Accepts]: Start accepts. Automaton has 5052 states and 12145 transitions. Word has length 31 [2021-02-19 17:16:13,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:13,568 INFO L480 AbstractCegarLoop]: Abstraction has 5052 states and 12145 transitions. [2021-02-19 17:16:13,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:13,568 INFO L276 IsEmpty]: Start isEmpty. Operand 5052 states and 12145 transitions. [2021-02-19 17:16:13,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 17:16:13,572 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:13,572 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:13,792 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-02-19 17:16:13,792 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:13,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:13,793 INFO L82 PathProgramCache]: Analyzing trace with hash 116296650, now seen corresponding path program 31 times [2021-02-19 17:16:13,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:13,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300638912] [2021-02-19 17:16:13,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:13,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:13,915 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:13,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300638912] [2021-02-19 17:16:13,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718273186] [2021-02-19 17:16:13,916 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:16:13,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:13,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:16:13,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:14,161 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:14,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:14,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-02-19 17:16:14,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685591602] [2021-02-19 17:16:14,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:16:14,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:14,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:16:14,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:16:14,162 INFO L87 Difference]: Start difference. First operand 5052 states and 12145 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:14,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:14,529 INFO L93 Difference]: Finished difference Result 5662 states and 13472 transitions. [2021-02-19 17:16:14,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:16:14,529 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-02-19 17:16:14,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:14,534 INFO L225 Difference]: With dead ends: 5662 [2021-02-19 17:16:14,534 INFO L226 Difference]: Without dead ends: 5648 [2021-02-19 17:16:14,534 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:16:14,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5648 states. [2021-02-19 17:16:14,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5648 to 5352. [2021-02-19 17:16:14,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5352 states, 5351 states have (on average 2.4075873668473182) internal successors, (12883), 5351 states have internal predecessors, (12883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:14,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5352 states to 5352 states and 12883 transitions. [2021-02-19 17:16:14,580 INFO L78 Accepts]: Start accepts. Automaton has 5352 states and 12883 transitions. Word has length 32 [2021-02-19 17:16:14,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:14,580 INFO L480 AbstractCegarLoop]: Abstraction has 5352 states and 12883 transitions. [2021-02-19 17:16:14,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:14,580 INFO L276 IsEmpty]: Start isEmpty. Operand 5352 states and 12883 transitions. [2021-02-19 17:16:14,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 17:16:14,583 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:14,583 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:14,784 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-02-19 17:16:14,784 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:14,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:14,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1118586734, now seen corresponding path program 32 times [2021-02-19 17:16:14,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:14,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795501453] [2021-02-19 17:16:14,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:14,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:14,908 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:14,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795501453] [2021-02-19 17:16:14,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588015520] [2021-02-19 17:16:14,908 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:14,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:16:14,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:14,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:16:14,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:15,094 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:15,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:15,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-02-19 17:16:15,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850645686] [2021-02-19 17:16:15,094 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:16:15,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:15,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:16:15,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:16:15,095 INFO L87 Difference]: Start difference. First operand 5352 states and 12883 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:15,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:15,474 INFO L93 Difference]: Finished difference Result 5807 states and 13850 transitions. [2021-02-19 17:16:15,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:16:15,475 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-02-19 17:16:15,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:15,479 INFO L225 Difference]: With dead ends: 5807 [2021-02-19 17:16:15,479 INFO L226 Difference]: Without dead ends: 5793 [2021-02-19 17:16:15,480 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:16:15,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5793 states. [2021-02-19 17:16:15,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5793 to 5524. [2021-02-19 17:16:15,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5524 states, 5523 states have (on average 2.4110085098678256) internal successors, (13316), 5523 states have internal predecessors, (13316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:15,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5524 states to 5524 states and 13316 transitions. [2021-02-19 17:16:15,547 INFO L78 Accepts]: Start accepts. Automaton has 5524 states and 13316 transitions. Word has length 32 [2021-02-19 17:16:15,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:15,547 INFO L480 AbstractCegarLoop]: Abstraction has 5524 states and 13316 transitions. [2021-02-19 17:16:15,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:15,548 INFO L276 IsEmpty]: Start isEmpty. Operand 5524 states and 13316 transitions. [2021-02-19 17:16:15,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 17:16:15,552 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:15,552 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:15,767 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-02-19 17:16:15,767 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:15,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:15,767 INFO L82 PathProgramCache]: Analyzing trace with hash -862012470, now seen corresponding path program 33 times [2021-02-19 17:16:15,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:15,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485070400] [2021-02-19 17:16:15,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:15,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:15,905 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:15,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485070400] [2021-02-19 17:16:15,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607615589] [2021-02-19 17:16:15,906 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:15,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:16:15,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:15,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:16:15,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:16,117 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:16,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:16,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-02-19 17:16:16,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576665941] [2021-02-19 17:16:16,117 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:16:16,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:16,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:16:16,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:16:16,118 INFO L87 Difference]: Start difference. First operand 5524 states and 13316 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:16,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:16,674 INFO L93 Difference]: Finished difference Result 6674 states and 15890 transitions. [2021-02-19 17:16:16,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 17:16:16,675 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have 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 [2021-02-19 17:16:16,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:16,680 INFO L225 Difference]: With dead ends: 6674 [2021-02-19 17:16:16,680 INFO L226 Difference]: Without dead ends: 6644 [2021-02-19 17:16:16,680 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:16:16,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6644 states. [2021-02-19 17:16:16,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6644 to 5926. [2021-02-19 17:16:16,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5926 states, 5925 states have (on average 2.416877637130802) internal successors, (14320), 5925 states have internal predecessors, (14320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:16,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5926 states to 5926 states and 14320 transitions. [2021-02-19 17:16:16,740 INFO L78 Accepts]: Start accepts. Automaton has 5926 states and 14320 transitions. Word has length 32 [2021-02-19 17:16:16,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:16,740 INFO L480 AbstractCegarLoop]: Abstraction has 5926 states and 14320 transitions. [2021-02-19 17:16:16,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:16,741 INFO L276 IsEmpty]: Start isEmpty. Operand 5926 states and 14320 transitions. [2021-02-19 17:16:16,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 17:16:16,744 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:16,744 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:16,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:16,945 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:16,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:16,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1153394578, now seen corresponding path program 34 times [2021-02-19 17:16:16,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:16,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914408989] [2021-02-19 17:16:16,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:16,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:17,070 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:17,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914408989] [2021-02-19 17:16:17,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498273407] [2021-02-19 17:16:17,071 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:17,088 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:16:17,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:17,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:16:17,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:17,266 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:17,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:17,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-02-19 17:16:17,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997523274] [2021-02-19 17:16:17,267 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:16:17,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:17,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:16:17,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:16:17,267 INFO L87 Difference]: Start difference. First operand 5926 states and 14320 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:17,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:17,615 INFO L93 Difference]: Finished difference Result 7466 states and 17775 transitions. [2021-02-19 17:16:17,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:16:17,616 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-02-19 17:16:17,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:17,622 INFO L225 Difference]: With dead ends: 7466 [2021-02-19 17:16:17,622 INFO L226 Difference]: Without dead ends: 7426 [2021-02-19 17:16:17,622 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:16:17,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7426 states. [2021-02-19 17:16:17,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7426 to 6811. [2021-02-19 17:16:17,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6811 states, 6810 states have (on average 2.4252569750367106) internal successors, (16516), 6810 states have internal predecessors, (16516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:17,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6811 states to 6811 states and 16516 transitions. [2021-02-19 17:16:17,694 INFO L78 Accepts]: Start accepts. Automaton has 6811 states and 16516 transitions. Word has length 32 [2021-02-19 17:16:17,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:17,695 INFO L480 AbstractCegarLoop]: Abstraction has 6811 states and 16516 transitions. [2021-02-19 17:16:17,695 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:17,695 INFO L276 IsEmpty]: Start isEmpty. Operand 6811 states and 16516 transitions. [2021-02-19 17:16:17,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 17:16:17,699 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:17,699 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:17,899 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:17,899 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:17,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:17,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1682923844, now seen corresponding path program 35 times [2021-02-19 17:16:17,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:17,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820408452] [2021-02-19 17:16:17,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:17,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:18,012 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:18,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820408452] [2021-02-19 17:16:18,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058516837] [2021-02-19 17:16:18,012 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:18,029 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 17:16:18,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:18,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:16:18,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:18,208 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:18,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:18,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-02-19 17:16:18,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357305193] [2021-02-19 17:16:18,208 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:16:18,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:18,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:16:18,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:16:18,209 INFO L87 Difference]: Start difference. First operand 6811 states and 16516 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 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) [2021-02-19 17:16:18,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:18,565 INFO L93 Difference]: Finished difference Result 7186 states and 17309 transitions. [2021-02-19 17:16:18,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 17:16:18,566 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 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 [2021-02-19 17:16:18,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:18,572 INFO L225 Difference]: With dead ends: 7186 [2021-02-19 17:16:18,572 INFO L226 Difference]: Without dead ends: 7172 [2021-02-19 17:16:18,572 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:16:18,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7172 states. [2021-02-19 17:16:18,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7172 to 6996. [2021-02-19 17:16:18,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6996 states, 6995 states have (on average 2.4264474624731953) internal successors, (16973), 6995 states have internal predecessors, (16973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:18,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6996 states to 6996 states and 16973 transitions. [2021-02-19 17:16:18,635 INFO L78 Accepts]: Start accepts. Automaton has 6996 states and 16973 transitions. Word has length 32 [2021-02-19 17:16:18,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:18,635 INFO L480 AbstractCegarLoop]: Abstraction has 6996 states and 16973 transitions. [2021-02-19 17:16:18,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 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) [2021-02-19 17:16:18,635 INFO L276 IsEmpty]: Start isEmpty. Operand 6996 states and 16973 transitions. [2021-02-19 17:16:18,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 17:16:18,640 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:18,640 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:18,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:18,840 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:18,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:18,840 INFO L82 PathProgramCache]: Analyzing trace with hash 589057468, now seen corresponding path program 36 times [2021-02-19 17:16:18,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:18,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101256831] [2021-02-19 17:16:18,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:18,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:19,003 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:19,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101256831] [2021-02-19 17:16:19,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653990600] [2021-02-19 17:16:19,003 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:19,020 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 17:16:19,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:19,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:16:19,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:19,189 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:19,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:19,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-02-19 17:16:19,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266944110] [2021-02-19 17:16:19,190 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:16:19,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:19,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:16:19,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:16:19,191 INFO L87 Difference]: Start difference. First operand 6996 states and 16973 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:19,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:19,617 INFO L93 Difference]: Finished difference Result 8381 states and 20098 transitions. [2021-02-19 17:16:19,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:16:19,617 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-02-19 17:16:19,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:19,624 INFO L225 Difference]: With dead ends: 8381 [2021-02-19 17:16:19,624 INFO L226 Difference]: Without dead ends: 8341 [2021-02-19 17:16:19,625 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:16:19,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8341 states. [2021-02-19 17:16:19,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8341 to 7795. [2021-02-19 17:16:19,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7795 states, 7794 states have (on average 2.4280215550423403) internal successors, (18924), 7794 states have internal predecessors, (18924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:19,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7795 states to 7795 states and 18924 transitions. [2021-02-19 17:16:19,698 INFO L78 Accepts]: Start accepts. Automaton has 7795 states and 18924 transitions. Word has length 32 [2021-02-19 17:16:19,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:19,698 INFO L480 AbstractCegarLoop]: Abstraction has 7795 states and 18924 transitions. [2021-02-19 17:16:19,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:19,698 INFO L276 IsEmpty]: Start isEmpty. Operand 7795 states and 18924 transitions. [2021-02-19 17:16:19,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 17:16:19,703 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:19,703 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:19,904 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-02-19 17:16:19,904 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:19,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:19,904 INFO L82 PathProgramCache]: Analyzing trace with hash -857363246, now seen corresponding path program 37 times [2021-02-19 17:16:19,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:19,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863964209] [2021-02-19 17:16:19,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:19,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:20,020 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:20,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863964209] [2021-02-19 17:16:20,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556426711] [2021-02-19 17:16:20,021 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:16:20,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:20,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:16:20,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:20,242 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:20,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:20,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-02-19 17:16:20,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657358771] [2021-02-19 17:16:20,242 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:16:20,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:20,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:16:20,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:16:20,243 INFO L87 Difference]: Start difference. First operand 7795 states and 18924 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:20,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:20,799 INFO L93 Difference]: Finished difference Result 9510 states and 22724 transitions. [2021-02-19 17:16:20,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 17:16:20,799 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-02-19 17:16:20,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:20,807 INFO L225 Difference]: With dead ends: 9510 [2021-02-19 17:16:20,807 INFO L226 Difference]: Without dead ends: 9476 [2021-02-19 17:16:20,808 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:16:20,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9476 states. [2021-02-19 17:16:20,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9476 to 8348. [2021-02-19 17:16:20,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8348 states, 8347 states have (on average 2.434527375104828) internal successors, (20321), 8347 states have internal predecessors, (20321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:20,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8348 states to 8348 states and 20321 transitions. [2021-02-19 17:16:20,892 INFO L78 Accepts]: Start accepts. Automaton has 8348 states and 20321 transitions. Word has length 32 [2021-02-19 17:16:20,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:20,892 INFO L480 AbstractCegarLoop]: Abstraction has 8348 states and 20321 transitions. [2021-02-19 17:16:20,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:20,892 INFO L276 IsEmpty]: Start isEmpty. Operand 8348 states and 20321 transitions. [2021-02-19 17:16:20,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 17:16:20,897 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:20,897 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:21,098 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:21,098 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:21,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:21,098 INFO L82 PathProgramCache]: Analyzing trace with hash 838021274, now seen corresponding path program 38 times [2021-02-19 17:16:21,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:21,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850169592] [2021-02-19 17:16:21,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:21,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:21,215 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:21,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850169592] [2021-02-19 17:16:21,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303676349] [2021-02-19 17:16:21,216 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:21,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:16:21,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:21,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:16:21,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:21,414 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:21,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:21,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-02-19 17:16:21,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405529454] [2021-02-19 17:16:21,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:16:21,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:21,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:16:21,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:16:21,415 INFO L87 Difference]: Start difference. First operand 8348 states and 20321 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 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) [2021-02-19 17:16:21,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:21,851 INFO L93 Difference]: Finished difference Result 9488 states and 22893 transitions. [2021-02-19 17:16:21,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:16:21,852 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 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 [2021-02-19 17:16:21,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:21,860 INFO L225 Difference]: With dead ends: 9488 [2021-02-19 17:16:21,860 INFO L226 Difference]: Without dead ends: 9449 [2021-02-19 17:16:21,860 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:16:21,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9449 states. [2021-02-19 17:16:21,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9449 to 8723. [2021-02-19 17:16:21,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8723 states, 8722 states have (on average 2.4369410685622563) internal successors, (21255), 8722 states have internal predecessors, (21255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:21,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8723 states to 8723 states and 21255 transitions. [2021-02-19 17:16:21,976 INFO L78 Accepts]: Start accepts. Automaton has 8723 states and 21255 transitions. Word has length 32 [2021-02-19 17:16:21,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:21,976 INFO L480 AbstractCegarLoop]: Abstraction has 8723 states and 21255 transitions. [2021-02-19 17:16:21,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 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) [2021-02-19 17:16:21,976 INFO L276 IsEmpty]: Start isEmpty. Operand 8723 states and 21255 transitions. [2021-02-19 17:16:21,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 17:16:21,983 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:21,983 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:22,193 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:22,194 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:22,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:22,194 INFO L82 PathProgramCache]: Analyzing trace with hash 257438486, now seen corresponding path program 39 times [2021-02-19 17:16:22,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:22,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430266558] [2021-02-19 17:16:22,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:22,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:22,301 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:22,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430266558] [2021-02-19 17:16:22,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768597740] [2021-02-19 17:16:22,302 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:22,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:16:22,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:22,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:16:22,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:22,499 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:22,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:22,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-02-19 17:16:22,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239377689] [2021-02-19 17:16:22,500 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:16:22,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:22,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:16:22,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:16:22,500 INFO L87 Difference]: Start difference. First operand 8723 states and 21255 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:23,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:23,007 INFO L93 Difference]: Finished difference Result 11530 states and 27803 transitions. [2021-02-19 17:16:23,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:16:23,008 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have 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 [2021-02-19 17:16:23,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:23,018 INFO L225 Difference]: With dead ends: 11530 [2021-02-19 17:16:23,018 INFO L226 Difference]: Without dead ends: 11490 [2021-02-19 17:16:23,018 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:16:23,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11490 states. [2021-02-19 17:16:23,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11490 to 9431. [2021-02-19 17:16:23,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9431 states, 9430 states have (on average 2.4407211028632028) internal successors, (23016), 9430 states have internal predecessors, (23016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:23,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9431 states to 9431 states and 23016 transitions. [2021-02-19 17:16:23,116 INFO L78 Accepts]: Start accepts. Automaton has 9431 states and 23016 transitions. Word has length 32 [2021-02-19 17:16:23,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:23,117 INFO L480 AbstractCegarLoop]: Abstraction has 9431 states and 23016 transitions. [2021-02-19 17:16:23,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:23,117 INFO L276 IsEmpty]: Start isEmpty. Operand 9431 states and 23016 transitions. [2021-02-19 17:16:23,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 17:16:23,124 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:23,124 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:23,345 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-02-19 17:16:23,345 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:23,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:23,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1260209212, now seen corresponding path program 40 times [2021-02-19 17:16:23,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:23,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191479137] [2021-02-19 17:16:23,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:23,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:23,447 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:23,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191479137] [2021-02-19 17:16:23,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635941544] [2021-02-19 17:16:23,448 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:23,464 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:16:23,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:23,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:16:23,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:23,647 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:23,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:23,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-02-19 17:16:23,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669452885] [2021-02-19 17:16:23,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:16:23,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:23,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:16:23,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:16:23,648 INFO L87 Difference]: Start difference. First operand 9431 states and 23016 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:23,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:23,954 INFO L93 Difference]: Finished difference Result 10586 states and 25593 transitions. [2021-02-19 17:16:23,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:16:23,955 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-02-19 17:16:23,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:23,964 INFO L225 Difference]: With dead ends: 10586 [2021-02-19 17:16:23,964 INFO L226 Difference]: Without dead ends: 10559 [2021-02-19 17:16:23,965 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:16:23,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10559 states. [2021-02-19 17:16:24,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10559 to 10133. [2021-02-19 17:16:24,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10133 states, 10132 states have (on average 2.438709040663245) internal successors, (24709), 10132 states have internal predecessors, (24709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:24,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10133 states to 10133 states and 24709 transitions. [2021-02-19 17:16:24,063 INFO L78 Accepts]: Start accepts. Automaton has 10133 states and 24709 transitions. Word has length 32 [2021-02-19 17:16:24,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:24,064 INFO L480 AbstractCegarLoop]: Abstraction has 10133 states and 24709 transitions. [2021-02-19 17:16:24,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:24,064 INFO L276 IsEmpty]: Start isEmpty. Operand 10133 states and 24709 transitions. [2021-02-19 17:16:24,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 17:16:24,070 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:24,070 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:24,270 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-02-19 17:16:24,271 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:24,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:24,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1198503752, now seen corresponding path program 41 times [2021-02-19 17:16:24,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:24,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517148410] [2021-02-19 17:16:24,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:24,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:24,389 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:24,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517148410] [2021-02-19 17:16:24,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766147340] [2021-02-19 17:16:24,389 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:24,412 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 17:16:24,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:24,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:16:24,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:24,605 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:24,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:24,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-02-19 17:16:24,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890060330] [2021-02-19 17:16:24,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:16:24,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:24,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:16:24,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:16:24,607 INFO L87 Difference]: Start difference. First operand 10133 states and 24709 transitions. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:24,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:24,932 INFO L93 Difference]: Finished difference Result 11077 states and 26854 transitions. [2021-02-19 17:16:24,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:16:24,932 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-02-19 17:16:24,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:24,942 INFO L225 Difference]: With dead ends: 11077 [2021-02-19 17:16:24,942 INFO L226 Difference]: Without dead ends: 11043 [2021-02-19 17:16:24,943 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:16:24,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11043 states. [2021-02-19 17:16:25,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11043 to 10335. [2021-02-19 17:16:25,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10335 states, 10334 states have (on average 2.439713566866654) internal successors, (25212), 10334 states have internal predecessors, (25212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:25,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10335 states to 10335 states and 25212 transitions. [2021-02-19 17:16:25,045 INFO L78 Accepts]: Start accepts. Automaton has 10335 states and 25212 transitions. Word has length 32 [2021-02-19 17:16:25,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:25,045 INFO L480 AbstractCegarLoop]: Abstraction has 10335 states and 25212 transitions. [2021-02-19 17:16:25,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:25,046 INFO L276 IsEmpty]: Start isEmpty. Operand 10335 states and 25212 transitions. [2021-02-19 17:16:25,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 17:16:25,052 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:25,052 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:25,252 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-02-19 17:16:25,253 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:25,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:25,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1878395776, now seen corresponding path program 42 times [2021-02-19 17:16:25,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:25,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821466272] [2021-02-19 17:16:25,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:25,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:25,365 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:25,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821466272] [2021-02-19 17:16:25,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437552299] [2021-02-19 17:16:25,365 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:25,382 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 17:16:25,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:25,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:16:25,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:25,609 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:25,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:25,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-02-19 17:16:25,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452796184] [2021-02-19 17:16:25,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:16:25,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:25,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:16:25,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:16:25,610 INFO L87 Difference]: Start difference. First operand 10335 states and 25212 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:26,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:26,010 INFO L93 Difference]: Finished difference Result 11359 states and 27517 transitions. [2021-02-19 17:16:26,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:16:26,010 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-02-19 17:16:26,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:26,021 INFO L225 Difference]: With dead ends: 11359 [2021-02-19 17:16:26,021 INFO L226 Difference]: Without dead ends: 11319 [2021-02-19 17:16:26,021 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:16:26,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11319 states. [2021-02-19 17:16:26,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11319 to 10443. [2021-02-19 17:16:26,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10443 states, 10442 states have (on average 2.439666730511396) internal successors, (25475), 10442 states have internal predecessors, (25475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:26,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10443 states to 10443 states and 25475 transitions. [2021-02-19 17:16:26,127 INFO L78 Accepts]: Start accepts. Automaton has 10443 states and 25475 transitions. Word has length 32 [2021-02-19 17:16:26,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:26,127 INFO L480 AbstractCegarLoop]: Abstraction has 10443 states and 25475 transitions. [2021-02-19 17:16:26,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:26,127 INFO L276 IsEmpty]: Start isEmpty. Operand 10443 states and 25475 transitions. [2021-02-19 17:16:26,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 17:16:26,134 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:26,134 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:26,334 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:26,334 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:26,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:26,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1745496647, now seen corresponding path program 5 times [2021-02-19 17:16:26,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:26,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893370654] [2021-02-19 17:16:26,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:26,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:26,452 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-02-19 17:16:26,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893370654] [2021-02-19 17:16:26,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529618134] [2021-02-19 17:16:26,452 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:26,475 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 17:16:26,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:26,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:16:26,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:26,594 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-02-19 17:16:26,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:26,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-02-19 17:16:26,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791432571] [2021-02-19 17:16:26,595 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:16:26,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:26,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:16:26,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:16:26,596 INFO L87 Difference]: Start difference. First operand 10443 states and 25475 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 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) [2021-02-19 17:16:26,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:26,931 INFO L93 Difference]: Finished difference Result 10579 states and 25763 transitions. [2021-02-19 17:16:26,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:16:26,932 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 17:16:26,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:26,947 INFO L225 Difference]: With dead ends: 10579 [2021-02-19 17:16:26,947 INFO L226 Difference]: Without dead ends: 10480 [2021-02-19 17:16:26,947 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:16:26,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10480 states. [2021-02-19 17:16:27,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10480 to 10452. [2021-02-19 17:16:27,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10452 states, 10451 states have (on average 2.4395751602717444) internal successors, (25496), 10451 states have internal predecessors, (25496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:27,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10452 states to 10452 states and 25496 transitions. [2021-02-19 17:16:27,110 INFO L78 Accepts]: Start accepts. Automaton has 10452 states and 25496 transitions. Word has length 33 [2021-02-19 17:16:27,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:27,110 INFO L480 AbstractCegarLoop]: Abstraction has 10452 states and 25496 transitions. [2021-02-19 17:16:27,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 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) [2021-02-19 17:16:27,110 INFO L276 IsEmpty]: Start isEmpty. Operand 10452 states and 25496 transitions. [2021-02-19 17:16:27,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 17:16:27,118 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:27,118 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:27,318 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:27,318 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:27,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:27,318 INFO L82 PathProgramCache]: Analyzing trace with hash 2135149676, now seen corresponding path program 43 times [2021-02-19 17:16:27,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:27,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497108778] [2021-02-19 17:16:27,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:27,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:27,362 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:16:27,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497108778] [2021-02-19 17:16:27,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474105208] [2021-02-19 17:16:27,362 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:27,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:27,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 17:16:27,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:27,470 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:16:27,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:27,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-02-19 17:16:27,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282086204] [2021-02-19 17:16:27,471 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:16:27,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:27,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:16:27,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:16:27,471 INFO L87 Difference]: Start difference. First operand 10452 states and 25496 transitions. Second operand has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:27,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:27,658 INFO L93 Difference]: Finished difference Result 13175 states and 31451 transitions. [2021-02-19 17:16:27,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:16:27,659 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 17:16:27,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:27,675 INFO L225 Difference]: With dead ends: 13175 [2021-02-19 17:16:27,675 INFO L226 Difference]: Without dead ends: 13175 [2021-02-19 17:16:27,676 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:16:27,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13175 states. [2021-02-19 17:16:27,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13175 to 10253. [2021-02-19 17:16:27,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10253 states, 10252 states have (on average 2.4039211861100274) internal successors, (24645), 10252 states have internal predecessors, (24645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:27,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10253 states to 10253 states and 24645 transitions. [2021-02-19 17:16:27,791 INFO L78 Accepts]: Start accepts. Automaton has 10253 states and 24645 transitions. Word has length 35 [2021-02-19 17:16:27,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:27,792 INFO L480 AbstractCegarLoop]: Abstraction has 10253 states and 24645 transitions. [2021-02-19 17:16:27,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:27,792 INFO L276 IsEmpty]: Start isEmpty. Operand 10253 states and 24645 transitions. [2021-02-19 17:16:27,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 17:16:27,799 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:27,799 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:28,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:28,000 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:28,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:28,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1711208140, now seen corresponding path program 44 times [2021-02-19 17:16:28,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:28,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994975970] [2021-02-19 17:16:28,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:28,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:28,043 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:16:28,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994975970] [2021-02-19 17:16:28,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255501858] [2021-02-19 17:16:28,043 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:28,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:16:28,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:28,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 17:16:28,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:28,165 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:16:28,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:28,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-02-19 17:16:28,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331528156] [2021-02-19 17:16:28,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:16:28,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:28,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:16:28,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:16:28,167 INFO L87 Difference]: Start difference. First operand 10253 states and 24645 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:28,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:28,339 INFO L93 Difference]: Finished difference Result 9582 states and 22134 transitions. [2021-02-19 17:16:28,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:16:28,341 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 17:16:28,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:28,353 INFO L225 Difference]: With dead ends: 9582 [2021-02-19 17:16:28,353 INFO L226 Difference]: Without dead ends: 9546 [2021-02-19 17:16:28,353 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:16:28,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9546 states. [2021-02-19 17:16:28,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9546 to 8819. [2021-02-19 17:16:28,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8819 states, 8818 states have (on average 2.325243819460195) internal successors, (20504), 8818 states have internal predecessors, (20504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:28,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8819 states to 8819 states and 20504 transitions. [2021-02-19 17:16:28,445 INFO L78 Accepts]: Start accepts. Automaton has 8819 states and 20504 transitions. Word has length 35 [2021-02-19 17:16:28,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:28,445 INFO L480 AbstractCegarLoop]: Abstraction has 8819 states and 20504 transitions. [2021-02-19 17:16:28,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:28,446 INFO L276 IsEmpty]: Start isEmpty. Operand 8819 states and 20504 transitions. [2021-02-19 17:16:28,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 17:16:28,451 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:28,451 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:28,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:28,652 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:28,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:28,652 INFO L82 PathProgramCache]: Analyzing trace with hash -538961219, now seen corresponding path program 45 times [2021-02-19 17:16:28,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:28,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121282503] [2021-02-19 17:16:28,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:28,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:28,678 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:28,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121282503] [2021-02-19 17:16:28,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395130795] [2021-02-19 17:16:28,678 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:28,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:16:28,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:28,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:16:28,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:28,749 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:16:28,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:28,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-02-19 17:16:28,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840351393] [2021-02-19 17:16:28,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:16:28,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:28,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:16:28,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:16:28,750 INFO L87 Difference]: Start difference. First operand 8819 states and 20504 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:28,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:28,857 INFO L93 Difference]: Finished difference Result 9119 states and 20973 transitions. [2021-02-19 17:16:28,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:16:28,857 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 17:16:28,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:28,864 INFO L225 Difference]: With dead ends: 9119 [2021-02-19 17:16:28,864 INFO L226 Difference]: Without dead ends: 9116 [2021-02-19 17:16:28,864 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:16:28,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9116 states. [2021-02-19 17:16:28,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9116 to 8819. [2021-02-19 17:16:28,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8819 states, 8818 states have (on average 2.3236561578589248) internal successors, (20490), 8818 states have internal predecessors, (20490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:28,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8819 states to 8819 states and 20490 transitions. [2021-02-19 17:16:28,964 INFO L78 Accepts]: Start accepts. Automaton has 8819 states and 20490 transitions. Word has length 35 [2021-02-19 17:16:28,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:28,964 INFO L480 AbstractCegarLoop]: Abstraction has 8819 states and 20490 transitions. [2021-02-19 17:16:28,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:28,964 INFO L276 IsEmpty]: Start isEmpty. Operand 8819 states and 20490 transitions. [2021-02-19 17:16:28,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 17:16:28,970 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:28,970 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:29,171 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-02-19 17:16:29,171 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:29,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:29,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1281603237, now seen corresponding path program 46 times [2021-02-19 17:16:29,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:29,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839970314] [2021-02-19 17:16:29,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:29,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:29,197 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:29,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839970314] [2021-02-19 17:16:29,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868773899] [2021-02-19 17:16:29,197 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:29,215 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:16:29,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:29,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:16:29,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:29,268 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 17:16:29,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:29,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-02-19 17:16:29,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293175589] [2021-02-19 17:16:29,268 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:16:29,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:29,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:16:29,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:16:29,269 INFO L87 Difference]: Start difference. First operand 8819 states and 20490 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:29,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:29,353 INFO L93 Difference]: Finished difference Result 11397 states and 26274 transitions. [2021-02-19 17:16:29,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:16:29,353 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 17:16:29,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:29,363 INFO L225 Difference]: With dead ends: 11397 [2021-02-19 17:16:29,363 INFO L226 Difference]: Without dead ends: 11397 [2021-02-19 17:16:29,363 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:16:29,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11397 states. [2021-02-19 17:16:29,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11397 to 10697. [2021-02-19 17:16:29,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10697 states, 10696 states have (on average 2.343025430067315) internal successors, (25061), 10696 states have internal predecessors, (25061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:29,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10697 states to 10697 states and 25061 transitions. [2021-02-19 17:16:29,467 INFO L78 Accepts]: Start accepts. Automaton has 10697 states and 25061 transitions. Word has length 35 [2021-02-19 17:16:29,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:29,467 INFO L480 AbstractCegarLoop]: Abstraction has 10697 states and 25061 transitions. [2021-02-19 17:16:29,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:29,467 INFO L276 IsEmpty]: Start isEmpty. Operand 10697 states and 25061 transitions. [2021-02-19 17:16:29,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 17:16:29,473 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:29,473 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:29,673 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:29,674 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:29,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:29,674 INFO L82 PathProgramCache]: Analyzing trace with hash -604548605, now seen corresponding path program 47 times [2021-02-19 17:16:29,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:29,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937160901] [2021-02-19 17:16:29,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:29,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:29,701 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:16:29,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937160901] [2021-02-19 17:16:29,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918268999] [2021-02-19 17:16:29,701 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:29,722 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:16:29,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:29,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:16:29,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:29,771 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:16:29,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:29,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-02-19 17:16:29,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580926047] [2021-02-19 17:16:29,772 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:16:29,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:29,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:16:29,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:16:29,772 INFO L87 Difference]: Start difference. First operand 10697 states and 25061 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:29,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:29,873 INFO L93 Difference]: Finished difference Result 11244 states and 25951 transitions. [2021-02-19 17:16:29,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:16:29,873 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 17:16:29,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:29,883 INFO L225 Difference]: With dead ends: 11244 [2021-02-19 17:16:29,883 INFO L226 Difference]: Without dead ends: 11238 [2021-02-19 17:16:29,884 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:16:29,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11238 states. [2021-02-19 17:16:29,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11238 to 9395. [2021-02-19 17:16:29,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9395 states, 9394 states have (on average 2.3070044709388973) internal successors, (21672), 9394 states have internal predecessors, (21672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:29,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9395 states to 9395 states and 21672 transitions. [2021-02-19 17:16:29,977 INFO L78 Accepts]: Start accepts. Automaton has 9395 states and 21672 transitions. Word has length 35 [2021-02-19 17:16:29,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:29,977 INFO L480 AbstractCegarLoop]: Abstraction has 9395 states and 21672 transitions. [2021-02-19 17:16:29,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:29,978 INFO L276 IsEmpty]: Start isEmpty. Operand 9395 states and 21672 transitions. [2021-02-19 17:16:29,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 17:16:29,983 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:29,983 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:30,184 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-02-19 17:16:30,184 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:30,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:30,184 INFO L82 PathProgramCache]: Analyzing trace with hash 2052846235, now seen corresponding path program 48 times [2021-02-19 17:16:30,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:30,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56268872] [2021-02-19 17:16:30,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:30,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:30,217 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:30,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56268872] [2021-02-19 17:16:30,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626698410] [2021-02-19 17:16:30,218 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:30,285 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:16:30,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:30,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:16:30,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:30,333 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:16:30,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:30,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-02-19 17:16:30,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145686658] [2021-02-19 17:16:30,334 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:16:30,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:30,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:16:30,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:16:30,334 INFO L87 Difference]: Start difference. First operand 9395 states and 21672 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:30,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:30,432 INFO L93 Difference]: Finished difference Result 9906 states and 22502 transitions. [2021-02-19 17:16:30,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:16:30,432 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 17:16:30,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:30,440 INFO L225 Difference]: With dead ends: 9906 [2021-02-19 17:16:30,440 INFO L226 Difference]: Without dead ends: 9894 [2021-02-19 17:16:30,440 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:16:30,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9894 states. [2021-02-19 17:16:30,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9894 to 9398. [2021-02-19 17:16:30,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9398 states, 9397 states have (on average 2.2974353517079917) internal successors, (21589), 9397 states have internal predecessors, (21589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:30,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9398 states to 9398 states and 21589 transitions. [2021-02-19 17:16:30,567 INFO L78 Accepts]: Start accepts. Automaton has 9398 states and 21589 transitions. Word has length 35 [2021-02-19 17:16:30,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:30,567 INFO L480 AbstractCegarLoop]: Abstraction has 9398 states and 21589 transitions. [2021-02-19 17:16:30,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:30,567 INFO L276 IsEmpty]: Start isEmpty. Operand 9398 states and 21589 transitions. [2021-02-19 17:16:30,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 17:16:30,573 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:30,573 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:30,773 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-02-19 17:16:30,773 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:30,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:30,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1738653529, now seen corresponding path program 49 times [2021-02-19 17:16:30,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:30,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193273109] [2021-02-19 17:16:30,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:30,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:30,803 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:30,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193273109] [2021-02-19 17:16:30,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105888572] [2021-02-19 17:16:30,803 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:30,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:30,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:16:30,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:30,876 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 17:16:30,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:30,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-02-19 17:16:30,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540246130] [2021-02-19 17:16:30,877 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:16:30,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:30,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:16:30,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:16:30,878 INFO L87 Difference]: Start difference. First operand 9398 states and 21589 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:30,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:30,968 INFO L93 Difference]: Finished difference Result 10139 states and 22898 transitions. [2021-02-19 17:16:30,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:16:30,968 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 17:16:30,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:30,977 INFO L225 Difference]: With dead ends: 10139 [2021-02-19 17:16:30,977 INFO L226 Difference]: Without dead ends: 10139 [2021-02-19 17:16:30,977 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:16:30,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10139 states. [2021-02-19 17:16:31,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10139 to 9398. [2021-02-19 17:16:31,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9398 states, 9397 states have (on average 2.295200595934873) internal successors, (21568), 9397 states have internal predecessors, (21568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:31,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9398 states to 9398 states and 21568 transitions. [2021-02-19 17:16:31,073 INFO L78 Accepts]: Start accepts. Automaton has 9398 states and 21568 transitions. Word has length 35 [2021-02-19 17:16:31,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:31,074 INFO L480 AbstractCegarLoop]: Abstraction has 9398 states and 21568 transitions. [2021-02-19 17:16:31,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:31,074 INFO L276 IsEmpty]: Start isEmpty. Operand 9398 states and 21568 transitions. [2021-02-19 17:16:31,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 17:16:31,080 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:31,080 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:31,280 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:31,281 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:31,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:31,281 INFO L82 PathProgramCache]: Analyzing trace with hash 599091545, now seen corresponding path program 50 times [2021-02-19 17:16:31,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:31,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123238897] [2021-02-19 17:16:31,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:31,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:31,306 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:31,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123238897] [2021-02-19 17:16:31,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834673336] [2021-02-19 17:16:31,306 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:31,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:16:31,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:31,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:16:31,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:31,371 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:16:31,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:31,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-02-19 17:16:31,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216797657] [2021-02-19 17:16:31,372 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:16:31,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:31,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:16:31,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:16:31,372 INFO L87 Difference]: Start difference. First operand 9398 states and 21568 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:31,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:31,472 INFO L93 Difference]: Finished difference Result 11101 states and 25290 transitions. [2021-02-19 17:16:31,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:16:31,473 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 17:16:31,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:31,482 INFO L225 Difference]: With dead ends: 11101 [2021-02-19 17:16:31,482 INFO L226 Difference]: Without dead ends: 11101 [2021-02-19 17:16:31,486 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:16:31,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11101 states. [2021-02-19 17:16:31,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11101 to 10511. [2021-02-19 17:16:31,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10511 states, 10510 states have (on average 2.312464319695528) internal successors, (24304), 10510 states have internal predecessors, (24304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:31,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10511 states to 10511 states and 24304 transitions. [2021-02-19 17:16:31,593 INFO L78 Accepts]: Start accepts. Automaton has 10511 states and 24304 transitions. Word has length 35 [2021-02-19 17:16:31,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:31,593 INFO L480 AbstractCegarLoop]: Abstraction has 10511 states and 24304 transitions. [2021-02-19 17:16:31,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:31,594 INFO L276 IsEmpty]: Start isEmpty. Operand 10511 states and 24304 transitions. [2021-02-19 17:16:31,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 17:16:31,600 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:31,600 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:31,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-02-19 17:16:31,800 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:31,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:31,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1276146177, now seen corresponding path program 51 times [2021-02-19 17:16:31,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:31,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208737160] [2021-02-19 17:16:31,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:31,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:31,825 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:31,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208737160] [2021-02-19 17:16:31,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662003109] [2021-02-19 17:16:31,826 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:16:31,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:16:31,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:31,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:16:31,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:31,909 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:16:31,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:31,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-02-19 17:16:31,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674823694] [2021-02-19 17:16:31,909 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:16:31,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:31,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:16:31,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:16:31,910 INFO L87 Difference]: Start difference. First operand 10511 states and 24304 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:32,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:32,001 INFO L93 Difference]: Finished difference Result 11074 states and 25227 transitions. [2021-02-19 17:16:32,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:16:32,001 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 17:16:32,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:32,016 INFO L225 Difference]: With dead ends: 11074 [2021-02-19 17:16:32,016 INFO L226 Difference]: Without dead ends: 11071 [2021-02-19 17:16:32,016 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:16:32,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11071 states. [2021-02-19 17:16:32,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11071 to 10511. [2021-02-19 17:16:32,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10511 states, 10510 states have (on average 2.3117031398667933) internal successors, (24296), 10510 states have internal predecessors, (24296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:32,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10511 states to 10511 states and 24296 transitions. [2021-02-19 17:16:32,173 INFO L78 Accepts]: Start accepts. Automaton has 10511 states and 24296 transitions. Word has length 35 [2021-02-19 17:16:32,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:32,173 INFO L480 AbstractCegarLoop]: Abstraction has 10511 states and 24296 transitions. [2021-02-19 17:16:32,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:32,173 INFO L276 IsEmpty]: Start isEmpty. Operand 10511 states and 24296 transitions. [2021-02-19 17:16:32,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 17:16:32,180 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:32,180 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:32,380 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:32,380 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:32,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:32,381 INFO L82 PathProgramCache]: Analyzing trace with hash -361426279, now seen corresponding path program 52 times [2021-02-19 17:16:32,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:32,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252354963] [2021-02-19 17:16:32,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:32,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:32,456 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:16:32,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252354963] [2021-02-19 17:16:32,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102979179] [2021-02-19 17:16:32,456 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:32,474 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:16:32,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:32,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:16:32,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:32,541 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:16:32,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:32,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-02-19 17:16:32,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716818352] [2021-02-19 17:16:32,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:16:32,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:32,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:16:32,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:16:32,542 INFO L87 Difference]: Start difference. First operand 10511 states and 24296 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:32,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:32,630 INFO L93 Difference]: Finished difference Result 11098 states and 25265 transitions. [2021-02-19 17:16:32,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:16:32,631 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 17:16:32,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:32,640 INFO L225 Difference]: With dead ends: 11098 [2021-02-19 17:16:32,640 INFO L226 Difference]: Without dead ends: 11086 [2021-02-19 17:16:32,640 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:16:32,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11086 states. [2021-02-19 17:16:32,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11086 to 10511. [2021-02-19 17:16:32,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10511 states, 10510 states have (on average 2.3078972407231206) internal successors, (24256), 10510 states have internal predecessors, (24256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:32,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10511 states to 10511 states and 24256 transitions. [2021-02-19 17:16:32,738 INFO L78 Accepts]: Start accepts. Automaton has 10511 states and 24256 transitions. Word has length 35 [2021-02-19 17:16:32,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:32,738 INFO L480 AbstractCegarLoop]: Abstraction has 10511 states and 24256 transitions. [2021-02-19 17:16:32,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:32,739 INFO L276 IsEmpty]: Start isEmpty. Operand 10511 states and 24256 transitions. [2021-02-19 17:16:32,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 17:16:32,745 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:32,746 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:32,949 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-02-19 17:16:32,950 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:32,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:32,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1416780099, now seen corresponding path program 53 times [2021-02-19 17:16:32,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:32,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232504502] [2021-02-19 17:16:32,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:32,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:32,981 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:32,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232504502] [2021-02-19 17:16:32,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655292536] [2021-02-19 17:16:32,981 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:16:33,004 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:16:33,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:33,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:16:33,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:33,060 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:33,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:33,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-02-19 17:16:33,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428527770] [2021-02-19 17:16:33,060 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:16:33,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:33,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:16:33,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:16:33,061 INFO L87 Difference]: Start difference. First operand 10511 states and 24256 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:33,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:33,167 INFO L93 Difference]: Finished difference Result 11062 states and 25159 transitions. [2021-02-19 17:16:33,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:16:33,167 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 17:16:33,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:33,176 INFO L225 Difference]: With dead ends: 11062 [2021-02-19 17:16:33,176 INFO L226 Difference]: Without dead ends: 11039 [2021-02-19 17:16:33,176 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:16:33,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11039 states. [2021-02-19 17:16:33,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11039 to 10526. [2021-02-19 17:16:33,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10526 states, 10525 states have (on average 2.3065083135391924) internal successors, (24276), 10525 states have internal predecessors, (24276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:33,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10526 states to 10526 states and 24276 transitions. [2021-02-19 17:16:33,276 INFO L78 Accepts]: Start accepts. Automaton has 10526 states and 24276 transitions. Word has length 35 [2021-02-19 17:16:33,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:33,276 INFO L480 AbstractCegarLoop]: Abstraction has 10526 states and 24276 transitions. [2021-02-19 17:16:33,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:33,276 INFO L276 IsEmpty]: Start isEmpty. Operand 10526 states and 24276 transitions. [2021-02-19 17:16:33,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-19 17:16:33,283 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:33,283 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:33,483 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:33,483 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:33,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:33,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1355165098, now seen corresponding path program 6 times [2021-02-19 17:16:33,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:33,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115392169] [2021-02-19 17:16:33,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:33,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:33,529 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 5 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:33,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115392169] [2021-02-19 17:16:33,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998011873] [2021-02-19 17:16:33,529 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:33,549 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-02-19 17:16:33,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:33,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:16:33,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:33,606 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:33,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:33,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-02-19 17:16:33,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527612339] [2021-02-19 17:16:33,607 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:16:33,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:33,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:16:33,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:16:33,607 INFO L87 Difference]: Start difference. First operand 10526 states and 24276 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:33,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:33,745 INFO L93 Difference]: Finished difference Result 11977 states and 27126 transitions. [2021-02-19 17:16:33,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:16:33,746 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-02-19 17:16:33,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:33,756 INFO L225 Difference]: With dead ends: 11977 [2021-02-19 17:16:33,756 INFO L226 Difference]: Without dead ends: 11977 [2021-02-19 17:16:33,756 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:16:33,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11977 states. [2021-02-19 17:16:33,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11977 to 10813. [2021-02-19 17:16:33,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10813 states, 10812 states have (on average 2.3063263041065483) internal successors, (24936), 10812 states have internal predecessors, (24936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:33,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10813 states to 10813 states and 24936 transitions. [2021-02-19 17:16:33,859 INFO L78 Accepts]: Start accepts. Automaton has 10813 states and 24936 transitions. Word has length 36 [2021-02-19 17:16:33,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:33,859 INFO L480 AbstractCegarLoop]: Abstraction has 10813 states and 24936 transitions. [2021-02-19 17:16:33,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:33,859 INFO L276 IsEmpty]: Start isEmpty. Operand 10813 states and 24936 transitions. [2021-02-19 17:16:33,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-19 17:16:33,866 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:33,866 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:34,081 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-02-19 17:16:34,082 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:34,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:34,082 INFO L82 PathProgramCache]: Analyzing trace with hash -487756462, now seen corresponding path program 54 times [2021-02-19 17:16:34,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:34,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380581777] [2021-02-19 17:16:34,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:34,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:34,295 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:34,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380581777] [2021-02-19 17:16:34,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137786800] [2021-02-19 17:16:34,295 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:34,312 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 17:16:34,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:34,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:16:34,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:34,549 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:34,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:34,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-02-19 17:16:34,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37560870] [2021-02-19 17:16:34,549 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 17:16:34,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:34,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 17:16:34,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:16:34,550 INFO L87 Difference]: Start difference. First operand 10813 states and 24936 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:35,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:35,193 INFO L93 Difference]: Finished difference Result 11896 states and 27360 transitions. [2021-02-19 17:16:35,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 17:16:35,193 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-02-19 17:16:35,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:35,204 INFO L225 Difference]: With dead ends: 11896 [2021-02-19 17:16:35,204 INFO L226 Difference]: Without dead ends: 11879 [2021-02-19 17:16:35,204 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:16:35,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11879 states. [2021-02-19 17:16:35,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11879 to 11426. [2021-02-19 17:16:35,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11426 states, 11425 states have (on average 2.312910284463895) internal successors, (26425), 11425 states have internal predecessors, (26425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:35,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11426 states to 11426 states and 26425 transitions. [2021-02-19 17:16:35,312 INFO L78 Accepts]: Start accepts. Automaton has 11426 states and 26425 transitions. Word has length 38 [2021-02-19 17:16:35,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:35,312 INFO L480 AbstractCegarLoop]: Abstraction has 11426 states and 26425 transitions. [2021-02-19 17:16:35,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:35,312 INFO L276 IsEmpty]: Start isEmpty. Operand 11426 states and 26425 transitions. [2021-02-19 17:16:35,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-19 17:16:35,320 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:35,320 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:35,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:35,520 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:35,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:35,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1604314138, now seen corresponding path program 55 times [2021-02-19 17:16:35,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:35,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994329656] [2021-02-19 17:16:35,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:35,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:35,704 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:35,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994329656] [2021-02-19 17:16:35,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830983389] [2021-02-19 17:16:35,705 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:35,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:35,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:16:35,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:36,013 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:36,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:36,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-02-19 17:16:36,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146226142] [2021-02-19 17:16:36,014 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 17:16:36,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:36,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 17:16:36,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:16:36,015 INFO L87 Difference]: Start difference. First operand 11426 states and 26425 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:36,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:36,646 INFO L93 Difference]: Finished difference Result 12194 states and 28106 transitions. [2021-02-19 17:16:36,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 17:16:36,646 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-02-19 17:16:36,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:36,657 INFO L225 Difference]: With dead ends: 12194 [2021-02-19 17:16:36,658 INFO L226 Difference]: Without dead ends: 12177 [2021-02-19 17:16:36,658 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:16:36,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12177 states. [2021-02-19 17:16:36,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12177 to 11804. [2021-02-19 17:16:36,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11804 states, 11803 states have (on average 2.3180547318478353) internal successors, (27360), 11803 states have internal predecessors, (27360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:36,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11804 states to 11804 states and 27360 transitions. [2021-02-19 17:16:36,790 INFO L78 Accepts]: Start accepts. Automaton has 11804 states and 27360 transitions. Word has length 38 [2021-02-19 17:16:36,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:36,790 INFO L480 AbstractCegarLoop]: Abstraction has 11804 states and 27360 transitions. [2021-02-19 17:16:36,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:36,791 INFO L276 IsEmpty]: Start isEmpty. Operand 11804 states and 27360 transitions. [2021-02-19 17:16:36,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-19 17:16:36,798 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:36,798 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:37,003 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-02-19 17:16:37,003 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:37,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:37,004 INFO L82 PathProgramCache]: Analyzing trace with hash -809919150, now seen corresponding path program 56 times [2021-02-19 17:16:37,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:37,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169277878] [2021-02-19 17:16:37,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:37,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:37,187 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:37,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169277878] [2021-02-19 17:16:37,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413557458] [2021-02-19 17:16:37,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:37,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:16:37,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:37,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:16:37,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:37,450 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:37,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:37,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-02-19 17:16:37,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095928726] [2021-02-19 17:16:37,451 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 17:16:37,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:37,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 17:16:37,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:16:37,451 INFO L87 Difference]: Start difference. First operand 11804 states and 27360 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:38,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:38,143 INFO L93 Difference]: Finished difference Result 12640 states and 29196 transitions. [2021-02-19 17:16:38,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 17:16:38,144 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-02-19 17:16:38,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:38,156 INFO L225 Difference]: With dead ends: 12640 [2021-02-19 17:16:38,156 INFO L226 Difference]: Without dead ends: 12623 [2021-02-19 17:16:38,156 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 17:16:38,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12623 states. [2021-02-19 17:16:38,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12623 to 12181. [2021-02-19 17:16:38,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12181 states, 12180 states have (on average 2.3230706075533663) internal successors, (28295), 12180 states have internal predecessors, (28295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:38,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12181 states to 12181 states and 28295 transitions. [2021-02-19 17:16:38,270 INFO L78 Accepts]: Start accepts. Automaton has 12181 states and 28295 transitions. Word has length 38 [2021-02-19 17:16:38,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:38,270 INFO L480 AbstractCegarLoop]: Abstraction has 12181 states and 28295 transitions. [2021-02-19 17:16:38,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:38,270 INFO L276 IsEmpty]: Start isEmpty. Operand 12181 states and 28295 transitions. [2021-02-19 17:16:38,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-19 17:16:38,277 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:38,277 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:38,493 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:38,494 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:38,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:38,494 INFO L82 PathProgramCache]: Analyzing trace with hash 2047160090, now seen corresponding path program 57 times [2021-02-19 17:16:38,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:38,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279545904] [2021-02-19 17:16:38,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:38,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:38,680 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:38,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279545904] [2021-02-19 17:16:38,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789568200] [2021-02-19 17:16:38,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:38,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 17:16:38,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:38,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:16:38,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:39,037 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:39,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:39,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-02-19 17:16:39,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641336860] [2021-02-19 17:16:39,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 17:16:39,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:39,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 17:16:39,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:16:39,038 INFO L87 Difference]: Start difference. First operand 12181 states and 28295 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:40,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:40,007 INFO L93 Difference]: Finished difference Result 15043 states and 34569 transitions. [2021-02-19 17:16:40,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 17:16:40,008 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-02-19 17:16:40,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:40,023 INFO L225 Difference]: With dead ends: 15043 [2021-02-19 17:16:40,023 INFO L226 Difference]: Without dead ends: 15009 [2021-02-19 17:16:40,023 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=155, Invalid=1485, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 17:16:40,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15009 states. [2021-02-19 17:16:40,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15009 to 12800. [2021-02-19 17:16:40,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12800 states, 12799 states have (on average 2.3282287678724902) internal successors, (29799), 12799 states have internal predecessors, (29799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:40,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12800 states to 12800 states and 29799 transitions. [2021-02-19 17:16:40,158 INFO L78 Accepts]: Start accepts. Automaton has 12800 states and 29799 transitions. Word has length 38 [2021-02-19 17:16:40,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:40,158 INFO L480 AbstractCegarLoop]: Abstraction has 12800 states and 29799 transitions. [2021-02-19 17:16:40,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:40,158 INFO L276 IsEmpty]: Start isEmpty. Operand 12800 states and 29799 transitions. [2021-02-19 17:16:40,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-19 17:16:40,166 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:40,166 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:40,366 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-02-19 17:16:40,366 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:40,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:40,367 INFO L82 PathProgramCache]: Analyzing trace with hash -604271022, now seen corresponding path program 58 times [2021-02-19 17:16:40,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:40,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533107616] [2021-02-19 17:16:40,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:40,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:40,530 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:40,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533107616] [2021-02-19 17:16:40,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875513035] [2021-02-19 17:16:40,530 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:40,547 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:16:40,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:40,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:16:40,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:40,824 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:40,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:40,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-02-19 17:16:40,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103782465] [2021-02-19 17:16:40,825 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 17:16:40,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:40,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 17:16:40,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:16:40,825 INFO L87 Difference]: Start difference. First operand 12800 states and 29799 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:41,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:41,373 INFO L93 Difference]: Finished difference Result 14047 states and 32541 transitions. [2021-02-19 17:16:41,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:16:41,373 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-02-19 17:16:41,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:41,386 INFO L225 Difference]: With dead ends: 14047 [2021-02-19 17:16:41,386 INFO L226 Difference]: Without dead ends: 14013 [2021-02-19 17:16:41,387 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:16:41,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14013 states. [2021-02-19 17:16:41,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14013 to 13526. [2021-02-19 17:16:41,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13526 states, 13525 states have (on average 2.3326432532347505) internal successors, (31549), 13525 states have internal predecessors, (31549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:41,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13526 states to 13526 states and 31549 transitions. [2021-02-19 17:16:41,550 INFO L78 Accepts]: Start accepts. Automaton has 13526 states and 31549 transitions. Word has length 38 [2021-02-19 17:16:41,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:41,550 INFO L480 AbstractCegarLoop]: Abstraction has 13526 states and 31549 transitions. [2021-02-19 17:16:41,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:41,550 INFO L276 IsEmpty]: Start isEmpty. Operand 13526 states and 31549 transitions. [2021-02-19 17:16:41,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-19 17:16:41,558 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:41,558 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:41,758 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-02-19 17:16:41,758 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:41,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:41,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1284163046, now seen corresponding path program 59 times [2021-02-19 17:16:41,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:41,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729919330] [2021-02-19 17:16:41,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:41,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:41,934 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:41,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729919330] [2021-02-19 17:16:41,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457657033] [2021-02-19 17:16:41,934 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:41,952 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-02-19 17:16:41,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:41,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:16:41,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:42,233 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:42,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:42,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-02-19 17:16:42,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532412169] [2021-02-19 17:16:42,233 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 17:16:42,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:42,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 17:16:42,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:16:42,234 INFO L87 Difference]: Start difference. First operand 13526 states and 31549 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:42,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:42,867 INFO L93 Difference]: Finished difference Result 16913 states and 39161 transitions. [2021-02-19 17:16:42,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:16:42,868 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-02-19 17:16:42,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:42,884 INFO L225 Difference]: With dead ends: 16913 [2021-02-19 17:16:42,884 INFO L226 Difference]: Without dead ends: 16870 [2021-02-19 17:16:42,884 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-02-19 17:16:42,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16870 states. [2021-02-19 17:16:43,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16870 to 15557. [2021-02-19 17:16:43,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15557 states, 15556 states have (on average 2.3482257649781433) internal successors, (36529), 15556 states have internal predecessors, (36529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:43,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15557 states to 15557 states and 36529 transitions. [2021-02-19 17:16:43,047 INFO L78 Accepts]: Start accepts. Automaton has 15557 states and 36529 transitions. Word has length 38 [2021-02-19 17:16:43,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:43,047 INFO L480 AbstractCegarLoop]: Abstraction has 15557 states and 36529 transitions. [2021-02-19 17:16:43,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:43,047 INFO L276 IsEmpty]: Start isEmpty. Operand 15557 states and 36529 transitions. [2021-02-19 17:16:43,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-19 17:16:43,055 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:43,055 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:43,258 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-02-19 17:16:43,258 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:43,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:43,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1041798934, now seen corresponding path program 60 times [2021-02-19 17:16:43,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:43,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462308098] [2021-02-19 17:16:43,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:43,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:43,440 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:43,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462308098] [2021-02-19 17:16:43,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11249120] [2021-02-19 17:16:43,440 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:43,463 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 17:16:43,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:43,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:16:43,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:43,776 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:43,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:43,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-02-19 17:16:43,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724773898] [2021-02-19 17:16:43,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 17:16:43,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:43,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 17:16:43,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:16:43,777 INFO L87 Difference]: Start difference. First operand 15557 states and 36529 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:44,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:44,476 INFO L93 Difference]: Finished difference Result 16313 states and 38191 transitions. [2021-02-19 17:16:44,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 17:16:44,477 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-02-19 17:16:44,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:44,492 INFO L225 Difference]: With dead ends: 16313 [2021-02-19 17:16:44,493 INFO L226 Difference]: Without dead ends: 16296 [2021-02-19 17:16:44,493 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 17:16:44,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16296 states. [2021-02-19 17:16:44,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16296 to 15947. [2021-02-19 17:16:44,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15947 states, 15946 states have (on average 2.3511225385676657) internal successors, (37491), 15946 states have internal predecessors, (37491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:44,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15947 states to 15947 states and 37491 transitions. [2021-02-19 17:16:44,654 INFO L78 Accepts]: Start accepts. Automaton has 15947 states and 37491 transitions. Word has length 38 [2021-02-19 17:16:44,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:44,655 INFO L480 AbstractCegarLoop]: Abstraction has 15947 states and 37491 transitions. [2021-02-19 17:16:44,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:44,655 INFO L276 IsEmpty]: Start isEmpty. Operand 15947 states and 37491 transitions. [2021-02-19 17:16:44,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-19 17:16:44,663 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:44,663 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:44,863 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:44,864 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:44,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:44,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1219801004, now seen corresponding path program 61 times [2021-02-19 17:16:44,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:44,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847162809] [2021-02-19 17:16:44,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:44,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:45,056 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:45,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847162809] [2021-02-19 17:16:45,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632821085] [2021-02-19 17:16:45,057 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:45,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:45,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:16:45,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:45,320 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:45,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:45,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-02-19 17:16:45,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970210481] [2021-02-19 17:16:45,321 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 17:16:45,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:45,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 17:16:45,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:16:45,321 INFO L87 Difference]: Start difference. First operand 15947 states and 37491 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:45,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:45,947 INFO L93 Difference]: Finished difference Result 16694 states and 39131 transitions. [2021-02-19 17:16:45,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 17:16:45,947 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-02-19 17:16:45,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:45,964 INFO L225 Difference]: With dead ends: 16694 [2021-02-19 17:16:45,964 INFO L226 Difference]: Without dead ends: 16677 [2021-02-19 17:16:45,964 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:16:45,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16677 states. [2021-02-19 17:16:46,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16677 to 16317. [2021-02-19 17:16:46,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16317 states, 16316 states have (on average 2.3539470458445697) internal successors, (38407), 16316 states have internal predecessors, (38407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:46,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16317 states to 16317 states and 38407 transitions. [2021-02-19 17:16:46,200 INFO L78 Accepts]: Start accepts. Automaton has 16317 states and 38407 transitions. Word has length 38 [2021-02-19 17:16:46,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:46,201 INFO L480 AbstractCegarLoop]: Abstraction has 16317 states and 38407 transitions. [2021-02-19 17:16:46,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:46,201 INFO L276 IsEmpty]: Start isEmpty. Operand 16317 states and 38407 transitions. [2021-02-19 17:16:46,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-19 17:16:46,211 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:46,211 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:46,411 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:46,411 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:46,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:46,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1879178556, now seen corresponding path program 62 times [2021-02-19 17:16:46,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:46,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839442530] [2021-02-19 17:16:46,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:46,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:46,602 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:46,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839442530] [2021-02-19 17:16:46,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242281168] [2021-02-19 17:16:46,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:46,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:16:46,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:46,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:16:46,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:46,882 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:46,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:46,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-02-19 17:16:46,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025137839] [2021-02-19 17:16:46,882 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 17:16:46,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:46,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 17:16:46,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:16:46,883 INFO L87 Difference]: Start difference. First operand 16317 states and 38407 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:47,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:47,496 INFO L93 Difference]: Finished difference Result 16910 states and 39707 transitions. [2021-02-19 17:16:47,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 17:16:47,496 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-02-19 17:16:47,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:47,513 INFO L225 Difference]: With dead ends: 16910 [2021-02-19 17:16:47,513 INFO L226 Difference]: Without dead ends: 16893 [2021-02-19 17:16:47,513 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:16:47,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16893 states. [2021-02-19 17:16:47,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16893 to 16652. [2021-02-19 17:16:47,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16652 states, 16651 states have (on average 2.3558945408684164) internal successors, (39228), 16651 states have internal predecessors, (39228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:47,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16652 states to 16652 states and 39228 transitions. [2021-02-19 17:16:47,679 INFO L78 Accepts]: Start accepts. Automaton has 16652 states and 39228 transitions. Word has length 38 [2021-02-19 17:16:47,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:47,679 INFO L480 AbstractCegarLoop]: Abstraction has 16652 states and 39228 transitions. [2021-02-19 17:16:47,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:47,680 INFO L276 IsEmpty]: Start isEmpty. Operand 16652 states and 39228 transitions. [2021-02-19 17:16:47,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-19 17:16:47,688 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:47,689 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:47,889 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:47,889 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:47,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:47,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1555452, now seen corresponding path program 63 times [2021-02-19 17:16:47,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:47,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256142561] [2021-02-19 17:16:47,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:47,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:48,049 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:48,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256142561] [2021-02-19 17:16:48,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117176870] [2021-02-19 17:16:48,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:48,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-02-19 17:16:48,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:48,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:16:48,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:48,405 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:48,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:48,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-02-19 17:16:48,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418859421] [2021-02-19 17:16:48,405 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 17:16:48,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:48,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 17:16:48,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=637, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:16:48,406 INFO L87 Difference]: Start difference. First operand 16652 states and 39228 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:49,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:49,545 INFO L93 Difference]: Finished difference Result 18935 states and 44264 transitions. [2021-02-19 17:16:49,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-02-19 17:16:49,545 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-02-19 17:16:49,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:49,564 INFO L225 Difference]: With dead ends: 18935 [2021-02-19 17:16:49,565 INFO L226 Difference]: Without dead ends: 18918 [2021-02-19 17:16:49,565 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=155, Invalid=1567, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 17:16:49,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18918 states. [2021-02-19 17:16:49,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18918 to 17289. [2021-02-19 17:16:49,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17289 states, 17288 states have (on average 2.3604812586765385) internal successors, (40808), 17288 states have internal predecessors, (40808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:49,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17289 states to 17289 states and 40808 transitions. [2021-02-19 17:16:49,749 INFO L78 Accepts]: Start accepts. Automaton has 17289 states and 40808 transitions. Word has length 38 [2021-02-19 17:16:49,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:49,749 INFO L480 AbstractCegarLoop]: Abstraction has 17289 states and 40808 transitions. [2021-02-19 17:16:49,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:49,750 INFO L276 IsEmpty]: Start isEmpty. Operand 17289 states and 40808 transitions. [2021-02-19 17:16:49,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-19 17:16:49,760 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:49,760 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:49,962 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-02-19 17:16:49,962 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:49,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:49,962 INFO L82 PathProgramCache]: Analyzing trace with hash 207203580, now seen corresponding path program 64 times [2021-02-19 17:16:49,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:49,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374053245] [2021-02-19 17:16:49,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:49,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:50,138 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:50,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374053245] [2021-02-19 17:16:50,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061939857] [2021-02-19 17:16:50,138 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:50,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:16:50,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:50,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:16:50,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:50,490 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:50,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:50,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-02-19 17:16:50,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079098103] [2021-02-19 17:16:50,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 17:16:50,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:50,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 17:16:50,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:16:50,491 INFO L87 Difference]: Start difference. First operand 17289 states and 40808 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:51,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:51,072 INFO L93 Difference]: Finished difference Result 17863 states and 42004 transitions. [2021-02-19 17:16:51,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 17:16:51,072 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-02-19 17:16:51,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:51,090 INFO L225 Difference]: With dead ends: 17863 [2021-02-19 17:16:51,090 INFO L226 Difference]: Without dead ends: 17829 [2021-02-19 17:16:51,090 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-02-19 17:16:51,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17829 states. [2021-02-19 17:16:51,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17829 to 17547. [2021-02-19 17:16:51,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17547 states, 17546 states have (on average 2.358828222956799) internal successors, (41388), 17546 states have internal predecessors, (41388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:51,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17547 states to 17547 states and 41388 transitions. [2021-02-19 17:16:51,267 INFO L78 Accepts]: Start accepts. Automaton has 17547 states and 41388 transitions. Word has length 38 [2021-02-19 17:16:51,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:51,267 INFO L480 AbstractCegarLoop]: Abstraction has 17547 states and 41388 transitions. [2021-02-19 17:16:51,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:51,267 INFO L276 IsEmpty]: Start isEmpty. Operand 17547 states and 41388 transitions. [2021-02-19 17:16:51,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-19 17:16:51,277 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:51,277 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:51,477 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:51,477 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:51,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:51,478 INFO L82 PathProgramCache]: Analyzing trace with hash -472688444, now seen corresponding path program 65 times [2021-02-19 17:16:51,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:51,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520624913] [2021-02-19 17:16:51,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:51,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:51,637 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:51,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520624913] [2021-02-19 17:16:51,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32645656] [2021-02-19 17:16:51,637 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:51,655 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 17:16:51,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:51,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:16:51,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:51,933 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:51,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:51,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-02-19 17:16:51,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991790891] [2021-02-19 17:16:51,933 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 17:16:51,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:51,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 17:16:51,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:16:51,934 INFO L87 Difference]: Start difference. First operand 17547 states and 41388 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:52,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:52,636 INFO L93 Difference]: Finished difference Result 20211 states and 47310 transitions. [2021-02-19 17:16:52,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:16:52,637 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-02-19 17:16:52,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:52,657 INFO L225 Difference]: With dead ends: 20211 [2021-02-19 17:16:52,657 INFO L226 Difference]: Without dead ends: 20168 [2021-02-19 17:16:52,657 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 17:16:52,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20168 states. [2021-02-19 17:16:52,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20168 to 18863. [2021-02-19 17:16:52,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18863 states, 18862 states have (on average 2.360089067967342) internal successors, (44516), 18862 states have internal predecessors, (44516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:52,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18863 states to 18863 states and 44516 transitions. [2021-02-19 17:16:52,857 INFO L78 Accepts]: Start accepts. Automaton has 18863 states and 44516 transitions. Word has length 38 [2021-02-19 17:16:52,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:52,857 INFO L480 AbstractCegarLoop]: Abstraction has 18863 states and 44516 transitions. [2021-02-19 17:16:52,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:52,857 INFO L276 IsEmpty]: Start isEmpty. Operand 18863 states and 44516 transitions. [2021-02-19 17:16:52,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-19 17:16:52,867 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:52,867 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:53,067 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:53,068 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:53,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:53,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1853273536, now seen corresponding path program 66 times [2021-02-19 17:16:53,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:53,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766558726] [2021-02-19 17:16:53,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:53,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:53,254 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:53,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766558726] [2021-02-19 17:16:53,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362643108] [2021-02-19 17:16:53,254 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:53,273 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 17:16:53,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:53,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:16:53,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:53,517 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:53,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:53,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-02-19 17:16:53,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98981135] [2021-02-19 17:16:53,518 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 17:16:53,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:53,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 17:16:53,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:16:53,518 INFO L87 Difference]: Start difference. First operand 18863 states and 44516 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:54,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:54,134 INFO L93 Difference]: Finished difference Result 19446 states and 45799 transitions. [2021-02-19 17:16:54,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 17:16:54,134 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-02-19 17:16:54,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:54,154 INFO L225 Difference]: With dead ends: 19446 [2021-02-19 17:16:54,155 INFO L226 Difference]: Without dead ends: 19429 [2021-02-19 17:16:54,155 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 17:16:54,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19429 states. [2021-02-19 17:16:54,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19429 to 19214. [2021-02-19 17:16:54,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19214 states, 19213 states have (on average 2.3614219538853902) internal successors, (45370), 19213 states have internal predecessors, (45370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:54,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19214 states to 19214 states and 45370 transitions. [2021-02-19 17:16:54,353 INFO L78 Accepts]: Start accepts. Automaton has 19214 states and 45370 transitions. Word has length 38 [2021-02-19 17:16:54,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:54,354 INFO L480 AbstractCegarLoop]: Abstraction has 19214 states and 45370 transitions. [2021-02-19 17:16:54,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:54,354 INFO L276 IsEmpty]: Start isEmpty. Operand 19214 states and 45370 transitions. [2021-02-19 17:16:54,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-19 17:16:54,364 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:54,364 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:54,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:54,564 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:54,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:54,565 INFO L82 PathProgramCache]: Analyzing trace with hash 2031275606, now seen corresponding path program 67 times [2021-02-19 17:16:54,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:54,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879651894] [2021-02-19 17:16:54,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:54,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:54,737 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-02-19 17:16:54,849 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:54,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879651894] [2021-02-19 17:16:54,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935367616] [2021-02-19 17:16:54,849 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:54,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:54,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:16:54,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:55,129 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:55,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:55,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-02-19 17:16:55,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857732194] [2021-02-19 17:16:55,129 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 17:16:55,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:55,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 17:16:55,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:16:55,130 INFO L87 Difference]: Start difference. First operand 19214 states and 45370 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:55,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:55,696 INFO L93 Difference]: Finished difference Result 19790 states and 46635 transitions. [2021-02-19 17:16:55,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 17:16:55,697 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-02-19 17:16:55,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:55,718 INFO L225 Difference]: With dead ends: 19790 [2021-02-19 17:16:55,718 INFO L226 Difference]: Without dead ends: 19773 [2021-02-19 17:16:55,718 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:16:55,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19773 states. [2021-02-19 17:16:55,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19773 to 19545. [2021-02-19 17:16:55,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19545 states, 19544 states have (on average 2.362771182971756) internal successors, (46178), 19544 states have internal predecessors, (46178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:55,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19545 states to 19545 states and 46178 transitions. [2021-02-19 17:16:55,920 INFO L78 Accepts]: Start accepts. Automaton has 19545 states and 46178 transitions. Word has length 38 [2021-02-19 17:16:55,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:55,920 INFO L480 AbstractCegarLoop]: Abstraction has 19545 states and 46178 transitions. [2021-02-19 17:16:55,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:55,920 INFO L276 IsEmpty]: Start isEmpty. Operand 19545 states and 46178 transitions. [2021-02-19 17:16:55,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-19 17:16:55,930 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:55,930 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:56,131 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-02-19 17:16:56,131 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:56,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:56,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1752803418, now seen corresponding path program 68 times [2021-02-19 17:16:56,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:56,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067803870] [2021-02-19 17:16:56,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:56,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:56,284 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:56,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067803870] [2021-02-19 17:16:56,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586140868] [2021-02-19 17:16:56,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:56,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:16:56,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:56,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:16:56,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:56,591 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:56,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:56,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-02-19 17:16:56,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812729236] [2021-02-19 17:16:56,592 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 17:16:56,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:56,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 17:16:56,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:16:56,592 INFO L87 Difference]: Start difference. First operand 19545 states and 46178 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:57,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:57,158 INFO L93 Difference]: Finished difference Result 20173 states and 47556 transitions. [2021-02-19 17:16:57,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:16:57,158 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-02-19 17:16:57,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:57,178 INFO L225 Difference]: With dead ends: 20173 [2021-02-19 17:16:57,178 INFO L226 Difference]: Without dead ends: 20156 [2021-02-19 17:16:57,178 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:16:57,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20156 states. [2021-02-19 17:16:57,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20156 to 19862. [2021-02-19 17:16:57,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19862 states, 19861 states have (on average 2.3641307084235437) internal successors, (46954), 19861 states have internal predecessors, (46954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:57,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19862 states to 19862 states and 46954 transitions. [2021-02-19 17:16:57,448 INFO L78 Accepts]: Start accepts. Automaton has 19862 states and 46954 transitions. Word has length 38 [2021-02-19 17:16:57,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:57,448 INFO L480 AbstractCegarLoop]: Abstraction has 19862 states and 46954 transitions. [2021-02-19 17:16:57,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:57,449 INFO L276 IsEmpty]: Start isEmpty. Operand 19862 states and 46954 transitions. [2021-02-19 17:16:57,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-19 17:16:57,459 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:57,459 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:57,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:57,660 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:57,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:57,660 INFO L82 PathProgramCache]: Analyzing trace with hash 314915362, now seen corresponding path program 69 times [2021-02-19 17:16:57,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:57,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615913756] [2021-02-19 17:16:57,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:57,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:57,820 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:57,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615913756] [2021-02-19 17:16:57,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054498683] [2021-02-19 17:16:57,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:57,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:16:57,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:57,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:16:57,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:58,104 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:16:58,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:58,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-02-19 17:16:58,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689722576] [2021-02-19 17:16:58,104 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 17:16:58,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:58,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 17:16:58,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:16:58,105 INFO L87 Difference]: Start difference. First operand 19862 states and 46954 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:58,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:58,835 INFO L93 Difference]: Finished difference Result 20811 states and 49049 transitions. [2021-02-19 17:16:58,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 17:16:58,836 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-02-19 17:16:58,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:58,856 INFO L225 Difference]: With dead ends: 20811 [2021-02-19 17:16:58,856 INFO L226 Difference]: Without dead ends: 20777 [2021-02-19 17:16:58,857 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=114, Invalid=1008, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 17:16:58,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20777 states. [2021-02-19 17:16:59,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20777 to 20322. [2021-02-19 17:16:59,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20322 states, 20321 states have (on average 2.3653855617341666) internal successors, (48067), 20321 states have internal predecessors, (48067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:59,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20322 states to 20322 states and 48067 transitions. [2021-02-19 17:16:59,065 INFO L78 Accepts]: Start accepts. Automaton has 20322 states and 48067 transitions. Word has length 38 [2021-02-19 17:16:59,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:59,065 INFO L480 AbstractCegarLoop]: Abstraction has 20322 states and 48067 transitions. [2021-02-19 17:16:59,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:59,065 INFO L276 IsEmpty]: Start isEmpty. Operand 20322 states and 48067 transitions. [2021-02-19 17:16:59,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-19 17:16:59,076 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:59,076 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:59,276 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:59,277 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:59,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:59,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1278559522, now seen corresponding path program 70 times [2021-02-19 17:16:59,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:59,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959624483] [2021-02-19 17:16:59,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:59,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:59,426 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:59,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959624483] [2021-02-19 17:16:59,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054706657] [2021-02-19 17:16:59,427 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:59,443 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:16:59,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:59,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:16:59,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:59,777 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:16:59,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:59,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-02-19 17:16:59,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007973829] [2021-02-19 17:16:59,778 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 17:16:59,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:59,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 17:16:59,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:16:59,779 INFO L87 Difference]: Start difference. First operand 20322 states and 48067 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:00,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:00,677 INFO L93 Difference]: Finished difference Result 23109 states and 54288 transitions. [2021-02-19 17:17:00,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 17:17:00,678 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-02-19 17:17:00,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:00,703 INFO L225 Difference]: With dead ends: 23109 [2021-02-19 17:17:00,704 INFO L226 Difference]: Without dead ends: 23066 [2021-02-19 17:17:00,704 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=123, Invalid=1067, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 17:17:00,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23066 states. [2021-02-19 17:17:00,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23066 to 21748. [2021-02-19 17:17:00,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21748 states, 21747 states have (on average 2.3661194647537593) internal successors, (51456), 21747 states have internal predecessors, (51456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:01,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21748 states to 21748 states and 51456 transitions. [2021-02-19 17:17:01,007 INFO L78 Accepts]: Start accepts. Automaton has 21748 states and 51456 transitions. Word has length 38 [2021-02-19 17:17:01,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:01,008 INFO L480 AbstractCegarLoop]: Abstraction has 21748 states and 51456 transitions. [2021-02-19 17:17:01,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:01,008 INFO L276 IsEmpty]: Start isEmpty. Operand 21748 states and 51456 transitions. [2021-02-19 17:17:01,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-19 17:17:01,021 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:01,021 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:01,221 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-02-19 17:17:01,222 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:01,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:01,222 INFO L82 PathProgramCache]: Analyzing trace with hash 199160884, now seen corresponding path program 71 times [2021-02-19 17:17:01,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:01,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534550831] [2021-02-19 17:17:01,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:01,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:01,373 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:01,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534550831] [2021-02-19 17:17:01,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276402928] [2021-02-19 17:17:01,373 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:01,391 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 17:17:01,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:01,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:17:01,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:01,658 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:17:01,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:01,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-02-19 17:17:01,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883615934] [2021-02-19 17:17:01,659 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 17:17:01,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:01,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 17:17:01,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:17:01,659 INFO L87 Difference]: Start difference. First operand 21748 states and 51456 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:02,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:02,417 INFO L93 Difference]: Finished difference Result 23617 states and 55513 transitions. [2021-02-19 17:17:02,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 17:17:02,418 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-02-19 17:17:02,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:02,442 INFO L225 Difference]: With dead ends: 23617 [2021-02-19 17:17:02,442 INFO L226 Difference]: Without dead ends: 23583 [2021-02-19 17:17:02,443 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=133, Invalid=1127, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 17:17:02,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23583 states. [2021-02-19 17:17:02,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23583 to 22217. [2021-02-19 17:17:02,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22217 states, 22216 states have (on average 2.3653222902412674) internal successors, (52548), 22216 states have internal predecessors, (52548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:02,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22217 states to 22217 states and 52548 transitions. [2021-02-19 17:17:02,678 INFO L78 Accepts]: Start accepts. Automaton has 22217 states and 52548 transitions. Word has length 38 [2021-02-19 17:17:02,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:02,678 INFO L480 AbstractCegarLoop]: Abstraction has 22217 states and 52548 transitions. [2021-02-19 17:17:02,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:02,679 INFO L276 IsEmpty]: Start isEmpty. Operand 22217 states and 52548 transitions. [2021-02-19 17:17:02,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-19 17:17:02,691 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:02,691 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:02,892 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:02,892 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:02,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:02,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1573443080, now seen corresponding path program 72 times [2021-02-19 17:17:02,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:02,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106660119] [2021-02-19 17:17:02,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:02,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:03,054 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:03,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106660119] [2021-02-19 17:17:03,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632784712] [2021-02-19 17:17:03,054 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:03,091 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:17:03,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:03,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:17:03,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:03,343 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:17:03,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:03,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-02-19 17:17:03,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167750049] [2021-02-19 17:17:03,343 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 17:17:03,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:03,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 17:17:03,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:17:03,344 INFO L87 Difference]: Start difference. First operand 22217 states and 52548 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:04,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:04,028 INFO L93 Difference]: Finished difference Result 22805 states and 53843 transitions. [2021-02-19 17:17:04,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 17:17:04,029 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-02-19 17:17:04,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:04,049 INFO L225 Difference]: With dead ends: 22805 [2021-02-19 17:17:04,049 INFO L226 Difference]: Without dead ends: 22788 [2021-02-19 17:17:04,049 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:17:04,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22788 states. [2021-02-19 17:17:04,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22788 to 22542. [2021-02-19 17:17:04,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22542 states, 22541 states have (on average 2.3664433698593674) internal successors, (53342), 22541 states have internal predecessors, (53342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:04,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22542 states to 22542 states and 53342 transitions. [2021-02-19 17:17:04,271 INFO L78 Accepts]: Start accepts. Automaton has 22542 states and 53342 transitions. Word has length 38 [2021-02-19 17:17:04,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:04,271 INFO L480 AbstractCegarLoop]: Abstraction has 22542 states and 53342 transitions. [2021-02-19 17:17:04,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:04,271 INFO L276 IsEmpty]: Start isEmpty. Operand 22542 states and 53342 transitions. [2021-02-19 17:17:04,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-19 17:17:04,284 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:04,284 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:04,484 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:04,484 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:04,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:04,485 INFO L82 PathProgramCache]: Analyzing trace with hash -690445794, now seen corresponding path program 73 times [2021-02-19 17:17:04,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:04,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499864992] [2021-02-19 17:17:04,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:04,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:04,658 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:04,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499864992] [2021-02-19 17:17:04,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265250073] [2021-02-19 17:17:04,659 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:04,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:04,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:17:04,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:04,933 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:17:04,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:04,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-02-19 17:17:04,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245357725] [2021-02-19 17:17:04,934 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 17:17:04,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:04,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 17:17:04,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:17:04,934 INFO L87 Difference]: Start difference. First operand 22542 states and 53342 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:05,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:05,555 INFO L93 Difference]: Finished difference Result 23126 states and 54628 transitions. [2021-02-19 17:17:05,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:17:05,555 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-02-19 17:17:05,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:05,579 INFO L225 Difference]: With dead ends: 23126 [2021-02-19 17:17:05,579 INFO L226 Difference]: Without dead ends: 23109 [2021-02-19 17:17:05,579 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:17:05,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23109 states. [2021-02-19 17:17:05,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23109 to 22863. [2021-02-19 17:17:05,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22863 states, 22862 states have (on average 2.367553144956697) internal successors, (54127), 22862 states have internal predecessors, (54127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:05,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22863 states to 22863 states and 54127 transitions. [2021-02-19 17:17:05,813 INFO L78 Accepts]: Start accepts. Automaton has 22863 states and 54127 transitions. Word has length 38 [2021-02-19 17:17:05,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:05,813 INFO L480 AbstractCegarLoop]: Abstraction has 22863 states and 54127 transitions. [2021-02-19 17:17:05,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:05,813 INFO L276 IsEmpty]: Start isEmpty. Operand 22863 states and 54127 transitions. [2021-02-19 17:17:05,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-19 17:17:05,826 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:05,826 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:06,026 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:06,027 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:06,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:06,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1249125756, now seen corresponding path program 74 times [2021-02-19 17:17:06,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:06,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461168486] [2021-02-19 17:17:06,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:06,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:06,191 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:06,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461168486] [2021-02-19 17:17:06,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283232166] [2021-02-19 17:17:06,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:06,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:17:06,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:06,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:17:06,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:06,460 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:17:06,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:06,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-02-19 17:17:06,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402927604] [2021-02-19 17:17:06,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 17:17:06,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:06,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 17:17:06,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:17:06,461 INFO L87 Difference]: Start difference. First operand 22863 states and 54127 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:07,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:07,280 INFO L93 Difference]: Finished difference Result 24322 states and 57349 transitions. [2021-02-19 17:17:07,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 17:17:07,281 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-02-19 17:17:07,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:07,305 INFO L225 Difference]: With dead ends: 24322 [2021-02-19 17:17:07,305 INFO L226 Difference]: Without dead ends: 24288 [2021-02-19 17:17:07,305 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=122, Invalid=1068, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 17:17:07,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24288 states. [2021-02-19 17:17:07,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24288 to 23374. [2021-02-19 17:17:07,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23374 states, 23373 states have (on average 2.3687588242844306) internal successors, (55365), 23373 states have internal predecessors, (55365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:07,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23374 states to 23374 states and 55365 transitions. [2021-02-19 17:17:07,553 INFO L78 Accepts]: Start accepts. Automaton has 23374 states and 55365 transitions. Word has length 38 [2021-02-19 17:17:07,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:07,553 INFO L480 AbstractCegarLoop]: Abstraction has 23374 states and 55365 transitions. [2021-02-19 17:17:07,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:07,554 INFO L276 IsEmpty]: Start isEmpty. Operand 23374 states and 55365 transitions. [2021-02-19 17:17:07,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-19 17:17:07,567 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:07,567 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:07,767 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:07,767 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:07,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:07,767 INFO L82 PathProgramCache]: Analyzing trace with hash 394410428, now seen corresponding path program 75 times [2021-02-19 17:17:07,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:07,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871470655] [2021-02-19 17:17:07,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:07,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:07,924 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:07,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871470655] [2021-02-19 17:17:07,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125683603] [2021-02-19 17:17:07,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:07,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-02-19 17:17:07,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:07,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:17:07,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:08,230 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:17:08,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:08,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-02-19 17:17:08,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366554434] [2021-02-19 17:17:08,230 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 17:17:08,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:08,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 17:17:08,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:17:08,231 INFO L87 Difference]: Start difference. First operand 23374 states and 55365 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:09,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:09,362 INFO L93 Difference]: Finished difference Result 27871 states and 65364 transitions. [2021-02-19 17:17:09,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 17:17:09,362 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-02-19 17:17:09,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:09,394 INFO L225 Difference]: With dead ends: 27871 [2021-02-19 17:17:09,394 INFO L226 Difference]: Without dead ends: 27837 [2021-02-19 17:17:09,394 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=142, Invalid=1340, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 17:17:09,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27837 states. [2021-02-19 17:17:09,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27837 to 25120. [2021-02-19 17:17:09,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25120 states, 25119 states have (on average 2.3722281937975236) internal successors, (59588), 25119 states have internal predecessors, (59588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:09,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25120 states to 25120 states and 59588 transitions. [2021-02-19 17:17:09,702 INFO L78 Accepts]: Start accepts. Automaton has 25120 states and 59588 transitions. Word has length 38 [2021-02-19 17:17:09,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:09,702 INFO L480 AbstractCegarLoop]: Abstraction has 25120 states and 59588 transitions. [2021-02-19 17:17:09,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:09,703 INFO L276 IsEmpty]: Start isEmpty. Operand 25120 states and 59588 transitions. [2021-02-19 17:17:09,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-19 17:17:09,717 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:09,717 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:09,917 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:09,917 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:09,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:09,918 INFO L82 PathProgramCache]: Analyzing trace with hash -605504124, now seen corresponding path program 76 times [2021-02-19 17:17:09,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:09,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003637266] [2021-02-19 17:17:09,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:09,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:10,046 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-02-19 17:17:10,185 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:10,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003637266] [2021-02-19 17:17:10,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356837854] [2021-02-19 17:17:10,185 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:10,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:17:10,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:10,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:17:10,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:10,489 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:17:10,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:10,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-02-19 17:17:10,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007604511] [2021-02-19 17:17:10,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 17:17:10,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:10,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 17:17:10,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:17:10,490 INFO L87 Difference]: Start difference. First operand 25120 states and 59588 transitions. Second operand has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:11,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:11,424 INFO L93 Difference]: Finished difference Result 28307 states and 66840 transitions. [2021-02-19 17:17:11,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 17:17:11,425 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-02-19 17:17:11,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:11,456 INFO L225 Difference]: With dead ends: 28307 [2021-02-19 17:17:11,456 INFO L226 Difference]: Without dead ends: 28255 [2021-02-19 17:17:11,456 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=152, Invalid=1330, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 17:17:11,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28255 states. [2021-02-19 17:17:11,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28255 to 26230. [2021-02-19 17:17:11,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26230 states, 26229 states have (on average 2.3725265927027337) internal successors, (62229), 26229 states have internal predecessors, (62229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:11,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26230 states to 26230 states and 62229 transitions. [2021-02-19 17:17:11,765 INFO L78 Accepts]: Start accepts. Automaton has 26230 states and 62229 transitions. Word has length 38 [2021-02-19 17:17:11,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:11,765 INFO L480 AbstractCegarLoop]: Abstraction has 26230 states and 62229 transitions. [2021-02-19 17:17:11,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:11,765 INFO L276 IsEmpty]: Start isEmpty. Operand 26230 states and 62229 transitions. [2021-02-19 17:17:11,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-19 17:17:11,779 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:11,779 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:11,980 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:11,980 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:11,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:11,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1122139584, now seen corresponding path program 77 times [2021-02-19 17:17:11,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:11,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337515209] [2021-02-19 17:17:11,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:11,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:12,154 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:12,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337515209] [2021-02-19 17:17:12,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291459377] [2021-02-19 17:17:12,155 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:12,180 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 17:17:12,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:12,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:17:12,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:12,425 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:17:12,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:12,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-02-19 17:17:12,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009326170] [2021-02-19 17:17:12,425 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 17:17:12,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:12,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 17:17:12,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:17:12,426 INFO L87 Difference]: Start difference. First operand 26230 states and 62229 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:13,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:13,031 INFO L93 Difference]: Finished difference Result 27788 states and 65761 transitions. [2021-02-19 17:17:13,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:17:13,032 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-02-19 17:17:13,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:13,064 INFO L225 Difference]: With dead ends: 27788 [2021-02-19 17:17:13,064 INFO L226 Difference]: Without dead ends: 27745 [2021-02-19 17:17:13,064 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:17:13,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27745 states. [2021-02-19 17:17:13,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27745 to 27377. [2021-02-19 17:17:13,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27377 states, 27376 states have (on average 2.3733927527761542) internal successors, (64974), 27376 states have internal predecessors, (64974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:13,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27377 states to 27377 states and 64974 transitions. [2021-02-19 17:17:13,487 INFO L78 Accepts]: Start accepts. Automaton has 27377 states and 64974 transitions. Word has length 38 [2021-02-19 17:17:13,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:13,487 INFO L480 AbstractCegarLoop]: Abstraction has 27377 states and 64974 transitions. [2021-02-19 17:17:13,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:13,487 INFO L276 IsEmpty]: Start isEmpty. Operand 27377 states and 64974 transitions. [2021-02-19 17:17:13,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-19 17:17:13,503 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:13,503 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:13,703 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-02-19 17:17:13,703 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:13,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:13,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1154327484, now seen corresponding path program 78 times [2021-02-19 17:17:13,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:13,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183191429] [2021-02-19 17:17:13,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:13,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:13,869 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:13,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183191429] [2021-02-19 17:17:13,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921272284] [2021-02-19 17:17:13,869 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:13,889 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-02-19 17:17:13,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:13,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:17:13,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:14,240 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:17:14,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:14,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-02-19 17:17:14,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748672454] [2021-02-19 17:17:14,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 17:17:14,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:14,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 17:17:14,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=638, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:17:14,241 INFO L87 Difference]: Start difference. First operand 27377 states and 64974 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:15,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:15,608 INFO L93 Difference]: Finished difference Result 36328 states and 85544 transitions. [2021-02-19 17:17:15,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-02-19 17:17:15,609 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-02-19 17:17:15,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:15,649 INFO L225 Difference]: With dead ends: 36328 [2021-02-19 17:17:15,649 INFO L226 Difference]: Without dead ends: 36251 [2021-02-19 17:17:15,650 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=208, Invalid=1954, Unknown=0, NotChecked=0, Total=2162 [2021-02-19 17:17:15,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36251 states. [2021-02-19 17:17:15,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36251 to 31462. [2021-02-19 17:17:15,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31462 states, 31461 states have (on average 2.380757127872604) internal successors, (74901), 31461 states have internal predecessors, (74901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:16,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31462 states to 31462 states and 74901 transitions. [2021-02-19 17:17:16,034 INFO L78 Accepts]: Start accepts. Automaton has 31462 states and 74901 transitions. Word has length 38 [2021-02-19 17:17:16,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:16,034 INFO L480 AbstractCegarLoop]: Abstraction has 31462 states and 74901 transitions. [2021-02-19 17:17:16,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:16,034 INFO L276 IsEmpty]: Start isEmpty. Operand 31462 states and 74901 transitions. [2021-02-19 17:17:16,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-19 17:17:16,049 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:16,049 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:16,250 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:16,250 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:16,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:16,250 INFO L82 PathProgramCache]: Analyzing trace with hash 2000293458, now seen corresponding path program 79 times [2021-02-19 17:17:16,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:16,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494391777] [2021-02-19 17:17:16,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:16,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:16,441 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:16,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494391777] [2021-02-19 17:17:16,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937996843] [2021-02-19 17:17:16,441 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:16,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:16,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:17:16,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:16,782 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:17:16,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:16,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-02-19 17:17:16,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536726862] [2021-02-19 17:17:16,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 17:17:16,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:16,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 17:17:16,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:17:16,783 INFO L87 Difference]: Start difference. First operand 31462 states and 74901 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:17,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:17,698 INFO L93 Difference]: Finished difference Result 33748 states and 79992 transitions. [2021-02-19 17:17:17,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 17:17:17,699 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-02-19 17:17:17,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:17,737 INFO L225 Difference]: With dead ends: 33748 [2021-02-19 17:17:17,737 INFO L226 Difference]: Without dead ends: 33715 [2021-02-19 17:17:17,737 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2021-02-19 17:17:17,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33715 states. [2021-02-19 17:17:18,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33715 to 32708. [2021-02-19 17:17:18,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32708 states, 32707 states have (on average 2.38224233344544) internal successors, (77916), 32707 states have internal predecessors, (77916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:18,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32708 states to 32708 states and 77916 transitions. [2021-02-19 17:17:18,110 INFO L78 Accepts]: Start accepts. Automaton has 32708 states and 77916 transitions. Word has length 38 [2021-02-19 17:17:18,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:18,111 INFO L480 AbstractCegarLoop]: Abstraction has 32708 states and 77916 transitions. [2021-02-19 17:17:18,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:18,111 INFO L276 IsEmpty]: Start isEmpty. Operand 32708 states and 77916 transitions. [2021-02-19 17:17:18,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-19 17:17:18,126 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:18,126 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:18,326 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-02-19 17:17:18,326 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:18,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:18,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1762856188, now seen corresponding path program 80 times [2021-02-19 17:17:18,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:18,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385485217] [2021-02-19 17:17:18,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:18,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:18,490 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:18,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385485217] [2021-02-19 17:17:18,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524424515] [2021-02-19 17:17:18,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:18,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:17:18,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:18,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:17:18,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:18,779 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:17:18,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:18,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2021-02-19 17:17:18,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774446618] [2021-02-19 17:17:18,779 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 17:17:18,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:18,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 17:17:18,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:17:18,780 INFO L87 Difference]: Start difference. First operand 32708 states and 77916 transitions. Second operand has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:19,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:19,383 INFO L93 Difference]: Finished difference Result 35110 states and 83307 transitions. [2021-02-19 17:17:19,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:17:19,384 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-02-19 17:17:19,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:19,424 INFO L225 Difference]: With dead ends: 35110 [2021-02-19 17:17:19,424 INFO L226 Difference]: Without dead ends: 35069 [2021-02-19 17:17:19,425 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:17:19,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35069 states. [2021-02-19 17:17:19,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35069 to 34187. [2021-02-19 17:17:19,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34187 states, 34186 states have (on average 2.3835780728953373) internal successors, (81485), 34186 states have internal predecessors, (81485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:20,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34187 states to 34187 states and 81485 transitions. [2021-02-19 17:17:20,016 INFO L78 Accepts]: Start accepts. Automaton has 34187 states and 81485 transitions. Word has length 38 [2021-02-19 17:17:20,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:20,016 INFO L480 AbstractCegarLoop]: Abstraction has 34187 states and 81485 transitions. [2021-02-19 17:17:20,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:20,016 INFO L276 IsEmpty]: Start isEmpty. Operand 34187 states and 81485 transitions. [2021-02-19 17:17:20,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-19 17:17:20,036 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:20,036 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:20,236 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-02-19 17:17:20,236 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:20,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:20,237 INFO L82 PathProgramCache]: Analyzing trace with hash 780594398, now seen corresponding path program 81 times [2021-02-19 17:17:20,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:20,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897452166] [2021-02-19 17:17:20,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:20,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:20,610 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:20,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897452166] [2021-02-19 17:17:20,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852119354] [2021-02-19 17:17:20,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:17:20,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:17:20,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:20,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:17:20,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:20,991 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:17:20,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:20,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-02-19 17:17:20,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057657731] [2021-02-19 17:17:20,992 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 17:17:20,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:20,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 17:17:20,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=639, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:17:20,992 INFO L87 Difference]: Start difference. First operand 34187 states and 81485 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:22,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:22,472 INFO L93 Difference]: Finished difference Result 40688 states and 96358 transitions. [2021-02-19 17:17:22,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-02-19 17:17:22,473 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-02-19 17:17:22,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:22,520 INFO L225 Difference]: With dead ends: 40688 [2021-02-19 17:17:22,520 INFO L226 Difference]: Without dead ends: 40654 [2021-02-19 17:17:22,520 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=180, Invalid=1890, Unknown=0, NotChecked=0, Total=2070 [2021-02-19 17:17:22,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40654 states. [2021-02-19 17:17:22,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40654 to 37776. [2021-02-19 17:17:22,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37776 states, 37775 states have (on average 2.3929053606882857) internal successors, (90392), 37775 states have internal predecessors, (90392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:23,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37776 states to 37776 states and 90392 transitions. [2021-02-19 17:17:23,020 INFO L78 Accepts]: Start accepts. Automaton has 37776 states and 90392 transitions. Word has length 38 [2021-02-19 17:17:23,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:23,020 INFO L480 AbstractCegarLoop]: Abstraction has 37776 states and 90392 transitions. [2021-02-19 17:17:23,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:23,020 INFO L276 IsEmpty]: Start isEmpty. Operand 37776 states and 90392 transitions. [2021-02-19 17:17:23,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-19 17:17:23,036 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:23,037 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:23,237 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:23,237 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:23,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:23,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1744238558, now seen corresponding path program 82 times [2021-02-19 17:17:23,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:23,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341006088] [2021-02-19 17:17:23,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:23,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:23,391 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:23,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341006088] [2021-02-19 17:17:23,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728495241] [2021-02-19 17:17:23,391 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:23,407 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:17:23,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:23,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:17:23,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:23,860 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:17:23,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:23,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-02-19 17:17:23,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736071072] [2021-02-19 17:17:23,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 17:17:23,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:23,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 17:17:23,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:17:23,862 INFO L87 Difference]: Start difference. First operand 37776 states and 90392 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:24,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:24,854 INFO L93 Difference]: Finished difference Result 40320 states and 96087 transitions. [2021-02-19 17:17:24,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 17:17:24,854 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-02-19 17:17:24,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:24,902 INFO L225 Difference]: With dead ends: 40320 [2021-02-19 17:17:24,903 INFO L226 Difference]: Without dead ends: 40277 [2021-02-19 17:17:24,903 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=142, Invalid=1264, Unknown=0, NotChecked=0, Total=1406 [2021-02-19 17:17:24,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40277 states. [2021-02-19 17:17:25,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40277 to 37806. [2021-02-19 17:17:25,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37806 states, 37805 states have (on average 2.3926464753339505) internal successors, (90454), 37805 states have internal predecessors, (90454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:25,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37806 states to 37806 states and 90454 transitions. [2021-02-19 17:17:25,508 INFO L78 Accepts]: Start accepts. Automaton has 37806 states and 90454 transitions. Word has length 38 [2021-02-19 17:17:25,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:25,508 INFO L480 AbstractCegarLoop]: Abstraction has 37806 states and 90454 transitions. [2021-02-19 17:17:25,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:25,508 INFO L276 IsEmpty]: Start isEmpty. Operand 37806 states and 90454 transitions. [2021-02-19 17:17:25,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-19 17:17:25,523 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:25,523 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:25,734 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:25,734 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:25,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:25,734 INFO L82 PathProgramCache]: Analyzing trace with hash 664839920, now seen corresponding path program 83 times [2021-02-19 17:17:25,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:25,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910017921] [2021-02-19 17:17:25,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:25,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:25,889 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:25,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910017921] [2021-02-19 17:17:25,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566553894] [2021-02-19 17:17:25,889 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:25,908 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 17:17:25,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:25,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:17:25,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:26,275 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:17:26,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:26,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-02-19 17:17:26,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233646116] [2021-02-19 17:17:26,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 17:17:26,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:26,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 17:17:26,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:17:26,275 INFO L87 Difference]: Start difference. First operand 37806 states and 90454 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:27,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:27,076 INFO L93 Difference]: Finished difference Result 39152 states and 93430 transitions. [2021-02-19 17:17:27,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 17:17:27,077 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-02-19 17:17:27,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:27,117 INFO L225 Difference]: With dead ends: 39152 [2021-02-19 17:17:27,117 INFO L226 Difference]: Without dead ends: 39118 [2021-02-19 17:17:27,117 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 17:17:27,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39118 states. [2021-02-19 17:17:27,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39118 to 38927. [2021-02-19 17:17:27,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38927 states, 38926 states have (on average 2.3894055387144837) internal successors, (93010), 38926 states have internal predecessors, (93010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:27,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38927 states to 38927 states and 93010 transitions. [2021-02-19 17:17:27,587 INFO L78 Accepts]: Start accepts. Automaton has 38927 states and 93010 transitions. Word has length 38 [2021-02-19 17:17:27,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:27,588 INFO L480 AbstractCegarLoop]: Abstraction has 38927 states and 93010 transitions. [2021-02-19 17:17:27,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:27,588 INFO L276 IsEmpty]: Start isEmpty. Operand 38927 states and 93010 transitions. [2021-02-19 17:17:27,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-19 17:17:27,605 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:27,605 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:27,821 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:27,822 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:27,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:27,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1138598152, now seen corresponding path program 84 times [2021-02-19 17:17:27,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:27,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300214715] [2021-02-19 17:17:27,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:27,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:27,980 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:27,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300214715] [2021-02-19 17:17:27,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250048167] [2021-02-19 17:17:27,980 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:27,997 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:17:27,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:27,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:17:27,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:28,250 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:17:28,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:28,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-02-19 17:17:28,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637168610] [2021-02-19 17:17:28,251 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 17:17:28,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:28,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 17:17:28,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:17:28,251 INFO L87 Difference]: Start difference. First operand 38927 states and 93010 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:29,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:29,193 INFO L93 Difference]: Finished difference Result 39710 states and 94740 transitions. [2021-02-19 17:17:29,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 17:17:29,193 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-02-19 17:17:29,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:29,235 INFO L225 Difference]: With dead ends: 39710 [2021-02-19 17:17:29,235 INFO L226 Difference]: Without dead ends: 39676 [2021-02-19 17:17:29,235 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=114, Invalid=1008, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 17:17:29,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39676 states. [2021-02-19 17:17:29,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39676 to 39279. [2021-02-19 17:17:29,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39279 states, 39278 states have (on average 2.390091145170324) internal successors, (93878), 39278 states have internal predecessors, (93878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:29,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39279 states to 39279 states and 93878 transitions. [2021-02-19 17:17:29,780 INFO L78 Accepts]: Start accepts. Automaton has 39279 states and 93878 transitions. Word has length 38 [2021-02-19 17:17:29,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:29,780 INFO L480 AbstractCegarLoop]: Abstraction has 39279 states and 93878 transitions. [2021-02-19 17:17:29,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:29,780 INFO L276 IsEmpty]: Start isEmpty. Operand 39279 states and 93878 transitions. [2021-02-19 17:17:29,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-19 17:17:29,796 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:29,796 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:29,997 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-02-19 17:17:29,998 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:29,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:29,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1512832960, now seen corresponding path program 85 times [2021-02-19 17:17:29,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:29,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569195608] [2021-02-19 17:17:29,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:30,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:30,152 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:30,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569195608] [2021-02-19 17:17:30,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654803609] [2021-02-19 17:17:30,152 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:30,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:30,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:17:30,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:30,444 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:17:30,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:30,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-02-19 17:17:30,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137044237] [2021-02-19 17:17:30,445 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 17:17:30,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:30,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 17:17:30,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:17:30,445 INFO L87 Difference]: Start difference. First operand 39279 states and 93878 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:31,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:31,297 INFO L93 Difference]: Finished difference Result 41067 states and 97771 transitions. [2021-02-19 17:17:31,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 17:17:31,298 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-02-19 17:17:31,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:31,346 INFO L225 Difference]: With dead ends: 41067 [2021-02-19 17:17:31,346 INFO L226 Difference]: Without dead ends: 41033 [2021-02-19 17:17:31,346 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=133, Invalid=1127, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 17:17:31,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41033 states. [2021-02-19 17:17:31,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41033 to 39745. [2021-02-19 17:17:31,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39745 states, 39744 states have (on average 2.3893669484702094) internal successors, (94963), 39744 states have internal predecessors, (94963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:31,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39745 states to 39745 states and 94963 transitions. [2021-02-19 17:17:31,878 INFO L78 Accepts]: Start accepts. Automaton has 39745 states and 94963 transitions. Word has length 38 [2021-02-19 17:17:31,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:31,879 INFO L480 AbstractCegarLoop]: Abstraction has 39745 states and 94963 transitions. [2021-02-19 17:17:31,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:31,879 INFO L276 IsEmpty]: Start isEmpty. Operand 39745 states and 94963 transitions. [2021-02-19 17:17:31,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-19 17:17:31,895 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:31,895 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:32,098 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:32,098 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:32,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:32,099 INFO L82 PathProgramCache]: Analyzing trace with hash 2102242312, now seen corresponding path program 86 times [2021-02-19 17:17:32,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:32,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121932742] [2021-02-19 17:17:32,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:32,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:32,294 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:32,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121932742] [2021-02-19 17:17:32,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352617333] [2021-02-19 17:17:32,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:32,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:17:32,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:32,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:17:32,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:32,873 WARN L202 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-02-19 17:17:32,914 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:17:32,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:32,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-02-19 17:17:32,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509121535] [2021-02-19 17:17:32,915 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 17:17:32,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:32,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 17:17:32,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:17:32,925 INFO L87 Difference]: Start difference. First operand 39745 states and 94963 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:33,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:33,861 INFO L93 Difference]: Finished difference Result 42419 states and 100916 transitions. [2021-02-19 17:17:33,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:17:33,865 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-02-19 17:17:33,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:33,918 INFO L225 Difference]: With dead ends: 42419 [2021-02-19 17:17:33,918 INFO L226 Difference]: Without dead ends: 42376 [2021-02-19 17:17:33,918 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=124, Invalid=1066, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 17:17:33,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42376 states. [2021-02-19 17:17:34,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42376 to 39971. [2021-02-19 17:17:34,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39971 states, 39970 states have (on average 2.3887415561671252) internal successors, (95478), 39970 states have internal predecessors, (95478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:34,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39971 states to 39971 states and 95478 transitions. [2021-02-19 17:17:34,617 INFO L78 Accepts]: Start accepts. Automaton has 39971 states and 95478 transitions. Word has length 38 [2021-02-19 17:17:34,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:34,617 INFO L480 AbstractCegarLoop]: Abstraction has 39971 states and 95478 transitions. [2021-02-19 17:17:34,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:34,617 INFO L276 IsEmpty]: Start isEmpty. Operand 39971 states and 95478 transitions. [2021-02-19 17:17:34,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-19 17:17:34,634 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:34,634 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:34,834 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-02-19 17:17:34,834 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:34,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:34,835 INFO L82 PathProgramCache]: Analyzing trace with hash -375723722, now seen corresponding path program 87 times [2021-02-19 17:17:34,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:34,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221886868] [2021-02-19 17:17:34,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:34,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:34,992 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:34,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221886868] [2021-02-19 17:17:34,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809036780] [2021-02-19 17:17:34,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:35,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:17:35,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:35,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:17:35,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:35,274 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:17:35,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:35,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-02-19 17:17:35,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89602566] [2021-02-19 17:17:35,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 17:17:35,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:35,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 17:17:35,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:17:35,275 INFO L87 Difference]: Start difference. First operand 39971 states and 95478 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:36,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:36,051 INFO L93 Difference]: Finished difference Result 40507 states and 96663 transitions. [2021-02-19 17:17:36,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 17:17:36,052 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-02-19 17:17:36,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:36,095 INFO L225 Difference]: With dead ends: 40507 [2021-02-19 17:17:36,095 INFO L226 Difference]: Without dead ends: 40490 [2021-02-19 17:17:36,096 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:17:36,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40490 states. [2021-02-19 17:17:36,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40490 to 40295. [2021-02-19 17:17:36,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40295 states, 40294 states have (on average 2.389189457487467) internal successors, (96270), 40294 states have internal predecessors, (96270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:36,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40295 states to 40295 states and 96270 transitions. [2021-02-19 17:17:36,638 INFO L78 Accepts]: Start accepts. Automaton has 40295 states and 96270 transitions. Word has length 38 [2021-02-19 17:17:36,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:36,639 INFO L480 AbstractCegarLoop]: Abstraction has 40295 states and 96270 transitions. [2021-02-19 17:17:36,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:36,639 INFO L276 IsEmpty]: Start isEmpty. Operand 40295 states and 96270 transitions. [2021-02-19 17:17:36,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-19 17:17:36,658 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:36,658 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:36,858 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:36,859 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:36,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:36,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1792416388, now seen corresponding path program 88 times [2021-02-19 17:17:36,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:36,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516995148] [2021-02-19 17:17:36,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:36,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:37,030 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:37,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516995148] [2021-02-19 17:17:37,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234752421] [2021-02-19 17:17:37,031 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:37,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:17:37,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:37,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:17:37,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:37,340 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:17:37,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:37,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-02-19 17:17:37,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691768607] [2021-02-19 17:17:37,340 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 17:17:37,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:37,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 17:17:37,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:17:37,341 INFO L87 Difference]: Start difference. First operand 40295 states and 96270 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:38,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:38,178 INFO L93 Difference]: Finished difference Result 40827 states and 97446 transitions. [2021-02-19 17:17:38,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:17:38,179 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-02-19 17:17:38,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:38,221 INFO L225 Difference]: With dead ends: 40827 [2021-02-19 17:17:38,221 INFO L226 Difference]: Without dead ends: 40810 [2021-02-19 17:17:38,222 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:17:38,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40810 states. [2021-02-19 17:17:38,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40810 to 40615. [2021-02-19 17:17:38,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40615 states, 40614 states have (on average 2.389643965135175) internal successors, (97053), 40614 states have internal predecessors, (97053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:38,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40615 states to 40615 states and 97053 transitions. [2021-02-19 17:17:38,832 INFO L78 Accepts]: Start accepts. Automaton has 40615 states and 97053 transitions. Word has length 38 [2021-02-19 17:17:38,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:38,832 INFO L480 AbstractCegarLoop]: Abstraction has 40615 states and 97053 transitions. [2021-02-19 17:17:38,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:38,832 INFO L276 IsEmpty]: Start isEmpty. Operand 40615 states and 97053 transitions. [2021-02-19 17:17:38,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-19 17:17:38,849 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:38,849 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:39,049 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:39,050 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:39,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:39,050 INFO L82 PathProgramCache]: Analyzing trace with hash 301350848, now seen corresponding path program 89 times [2021-02-19 17:17:39,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:39,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241162027] [2021-02-19 17:17:39,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:39,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:39,207 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:39,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241162027] [2021-02-19 17:17:39,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492892698] [2021-02-19 17:17:39,208 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:39,225 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 17:17:39,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:39,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:17:39,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:39,555 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:17:39,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:39,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-02-19 17:17:39,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778178688] [2021-02-19 17:17:39,555 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-02-19 17:17:39,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:39,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-02-19 17:17:39,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:17:39,556 INFO L87 Difference]: Start difference. First operand 40615 states and 97053 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:40,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:40,627 INFO L93 Difference]: Finished difference Result 41685 states and 99369 transitions. [2021-02-19 17:17:40,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 17:17:40,627 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-02-19 17:17:40,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:40,672 INFO L225 Difference]: With dead ends: 41685 [2021-02-19 17:17:40,672 INFO L226 Difference]: Without dead ends: 41668 [2021-02-19 17:17:40,672 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=147, Invalid=1335, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 17:17:40,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41668 states. [2021-02-19 17:17:41,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41668 to 40952. [2021-02-19 17:17:41,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40952 states, 40951 states have (on average 2.390124783277576) internal successors, (97878), 40951 states have internal predecessors, (97878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:41,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40952 states to 40952 states and 97878 transitions. [2021-02-19 17:17:41,299 INFO L78 Accepts]: Start accepts. Automaton has 40952 states and 97878 transitions. Word has length 38 [2021-02-19 17:17:41,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:41,299 INFO L480 AbstractCegarLoop]: Abstraction has 40952 states and 97878 transitions. [2021-02-19 17:17:41,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:41,299 INFO L276 IsEmpty]: Start isEmpty. Operand 40952 states and 97878 transitions. [2021-02-19 17:17:41,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-19 17:17:41,323 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:41,323 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:41,533 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-02-19 17:17:41,534 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:41,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:41,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1136537208, now seen corresponding path program 90 times [2021-02-19 17:17:41,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:41,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122914060] [2021-02-19 17:17:41,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:41,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:41,704 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:41,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122914060] [2021-02-19 17:17:41,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334603552] [2021-02-19 17:17:41,705 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:41,723 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:17:41,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:41,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:17:41,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:41,994 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:17:41,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:41,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-02-19 17:17:41,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605400549] [2021-02-19 17:17:41,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 17:17:41,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:41,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 17:17:41,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:17:41,995 INFO L87 Difference]: Start difference. First operand 40952 states and 97878 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:42,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:42,850 INFO L93 Difference]: Finished difference Result 41871 states and 99905 transitions. [2021-02-19 17:17:42,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 17:17:42,850 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-02-19 17:17:42,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:42,900 INFO L225 Difference]: With dead ends: 41871 [2021-02-19 17:17:42,900 INFO L226 Difference]: Without dead ends: 41837 [2021-02-19 17:17:42,900 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 17:17:43,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41837 states. [2021-02-19 17:17:43,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41837 to 41439. [2021-02-19 17:17:43,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41439 states, 41438 states have (on average 2.3901974033495823) internal successors, (99045), 41438 states have internal predecessors, (99045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:43,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41439 states to 41439 states and 99045 transitions. [2021-02-19 17:17:43,501 INFO L78 Accepts]: Start accepts. Automaton has 41439 states and 99045 transitions. Word has length 38 [2021-02-19 17:17:43,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:43,501 INFO L480 AbstractCegarLoop]: Abstraction has 41439 states and 99045 transitions. [2021-02-19 17:17:43,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:43,501 INFO L276 IsEmpty]: Start isEmpty. Operand 41439 states and 99045 transitions. [2021-02-19 17:17:43,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-19 17:17:43,519 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:43,519 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:43,719 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-02-19 17:17:43,719 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:43,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:43,720 INFO L82 PathProgramCache]: Analyzing trace with hash 506998976, now seen corresponding path program 91 times [2021-02-19 17:17:43,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:43,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251929370] [2021-02-19 17:17:43,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:43,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:44,033 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:44,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251929370] [2021-02-19 17:17:44,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592494451] [2021-02-19 17:17:44,034 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:44,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:44,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:17:44,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:44,329 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:17:44,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:44,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-02-19 17:17:44,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878793105] [2021-02-19 17:17:44,329 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 17:17:44,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:44,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 17:17:44,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:17:44,330 INFO L87 Difference]: Start difference. First operand 41439 states and 99045 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:45,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:45,121 INFO L93 Difference]: Finished difference Result 43352 states and 103181 transitions. [2021-02-19 17:17:45,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 17:17:45,122 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-02-19 17:17:45,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:45,173 INFO L225 Difference]: With dead ends: 43352 [2021-02-19 17:17:45,173 INFO L226 Difference]: Without dead ends: 43318 [2021-02-19 17:17:45,173 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=129, Invalid=1061, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 17:17:45,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43318 states. [2021-02-19 17:17:45,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43318 to 42025. [2021-02-19 17:17:45,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42025 states, 42024 states have (on average 2.389539310869979) internal successors, (100418), 42024 states have internal predecessors, (100418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:45,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42025 states to 42025 states and 100418 transitions. [2021-02-19 17:17:45,732 INFO L78 Accepts]: Start accepts. Automaton has 42025 states and 100418 transitions. Word has length 38 [2021-02-19 17:17:45,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:45,732 INFO L480 AbstractCegarLoop]: Abstraction has 42025 states and 100418 transitions. [2021-02-19 17:17:45,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:45,732 INFO L276 IsEmpty]: Start isEmpty. Operand 42025 states and 100418 transitions. [2021-02-19 17:17:45,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-19 17:17:45,750 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:45,751 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:45,951 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:45,951 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:45,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:45,951 INFO L82 PathProgramCache]: Analyzing trace with hash -172893048, now seen corresponding path program 92 times [2021-02-19 17:17:45,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:45,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063514904] [2021-02-19 17:17:45,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:45,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:46,108 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:46,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063514904] [2021-02-19 17:17:46,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115871935] [2021-02-19 17:17:46,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:46,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:17:46,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:46,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:17:46,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:46,546 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:17:46,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:46,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-02-19 17:17:46,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61198822] [2021-02-19 17:17:46,547 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 17:17:46,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:46,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 17:17:46,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:17:46,547 INFO L87 Difference]: Start difference. First operand 42025 states and 100418 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:47,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:47,248 INFO L93 Difference]: Finished difference Result 44617 states and 106177 transitions. [2021-02-19 17:17:47,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:17:47,249 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-02-19 17:17:47,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:47,302 INFO L225 Difference]: With dead ends: 44617 [2021-02-19 17:17:47,302 INFO L226 Difference]: Without dead ends: 44574 [2021-02-19 17:17:47,302 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 17:17:47,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44574 states. [2021-02-19 17:17:47,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44574 to 43210. [2021-02-19 17:17:47,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43210 states, 43209 states have (on average 2.3895021870443656) internal successors, (103248), 43209 states have internal predecessors, (103248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:47,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43210 states to 43210 states and 103248 transitions. [2021-02-19 17:17:47,941 INFO L78 Accepts]: Start accepts. Automaton has 43210 states and 103248 transitions. Word has length 38 [2021-02-19 17:17:47,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:47,941 INFO L480 AbstractCegarLoop]: Abstraction has 43210 states and 103248 transitions. [2021-02-19 17:17:47,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:47,941 INFO L276 IsEmpty]: Start isEmpty. Operand 43210 states and 103248 transitions. [2021-02-19 17:17:47,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-19 17:17:47,959 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:47,959 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:48,160 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-02-19 17:17:48,160 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:48,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:48,161 INFO L82 PathProgramCache]: Analyzing trace with hash 121990510, now seen corresponding path program 93 times [2021-02-19 17:17:48,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:48,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293909496] [2021-02-19 17:17:48,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:48,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:48,354 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:48,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293909496] [2021-02-19 17:17:48,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835872179] [2021-02-19 17:17:48,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:48,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:17:48,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:48,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:17:48,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:48,714 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:17:48,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:48,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-02-19 17:17:48,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092843029] [2021-02-19 17:17:48,714 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 17:17:48,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:48,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 17:17:48,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:17:48,714 INFO L87 Difference]: Start difference. First operand 43210 states and 103248 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:49,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:49,495 INFO L93 Difference]: Finished difference Result 43750 states and 104441 transitions. [2021-02-19 17:17:49,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 17:17:49,496 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-02-19 17:17:49,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:49,545 INFO L225 Difference]: With dead ends: 43750 [2021-02-19 17:17:49,545 INFO L226 Difference]: Without dead ends: 43733 [2021-02-19 17:17:49,545 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:17:49,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43733 states. [2021-02-19 17:17:49,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43733 to 43536. [2021-02-19 17:17:49,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43536 states, 43535 states have (on average 2.389893189387849) internal successors, (104044), 43535 states have internal predecessors, (104044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:50,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43536 states to 43536 states and 104044 transitions. [2021-02-19 17:17:50,007 INFO L78 Accepts]: Start accepts. Automaton has 43536 states and 104044 transitions. Word has length 38 [2021-02-19 17:17:50,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:50,007 INFO L480 AbstractCegarLoop]: Abstraction has 43536 states and 104044 transitions. [2021-02-19 17:17:50,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:50,007 INFO L276 IsEmpty]: Start isEmpty. Operand 43536 states and 104044 transitions. [2021-02-19 17:17:50,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-19 17:17:50,027 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:50,027 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:50,227 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-02-19 17:17:50,228 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:50,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:50,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1474879698, now seen corresponding path program 94 times [2021-02-19 17:17:50,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:50,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552475461] [2021-02-19 17:17:50,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:50,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:50,543 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:50,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552475461] [2021-02-19 17:17:50,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507580469] [2021-02-19 17:17:50,543 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:50,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:17:50,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:50,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 17:17:50,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:50,816 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:17:50,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:50,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-02-19 17:17:50,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542310932] [2021-02-19 17:17:50,816 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 17:17:50,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:50,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 17:17:50,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:17:50,817 INFO L87 Difference]: Start difference. First operand 43536 states and 104044 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:51,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:51,397 INFO L93 Difference]: Finished difference Result 44087 states and 105256 transitions. [2021-02-19 17:17:51,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:17:51,398 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-02-19 17:17:51,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:51,448 INFO L225 Difference]: With dead ends: 44087 [2021-02-19 17:17:51,448 INFO L226 Difference]: Without dead ends: 44070 [2021-02-19 17:17:51,449 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:17:51,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44070 states. [2021-02-19 17:17:51,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44070 to 43846. [2021-02-19 17:17:51,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43846 states, 43845 states have (on average 2.3903523776941498) internal successors, (104805), 43845 states have internal predecessors, (104805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:52,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43846 states to 43846 states and 104805 transitions. [2021-02-19 17:17:52,026 INFO L78 Accepts]: Start accepts. Automaton has 43846 states and 104805 transitions. Word has length 38 [2021-02-19 17:17:52,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:52,026 INFO L480 AbstractCegarLoop]: Abstraction has 43846 states and 104805 transitions. [2021-02-19 17:17:52,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:52,026 INFO L276 IsEmpty]: Start isEmpty. Operand 43846 states and 104805 transitions. [2021-02-19 17:17:52,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 17:17:52,044 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:52,044 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:52,245 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-02-19 17:17:52,245 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:52,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:52,246 INFO L82 PathProgramCache]: Analyzing trace with hash 328622480, now seen corresponding path program 95 times [2021-02-19 17:17:52,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:52,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309143712] [2021-02-19 17:17:52,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:52,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:52,285 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:17:52,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309143712] [2021-02-19 17:17:52,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096996145] [2021-02-19 17:17:52,286 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:52,303 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 17:17:52,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:52,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:17:52,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:52,362 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:17:52,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:52,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-02-19 17:17:52,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232604160] [2021-02-19 17:17:52,363 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:17:52,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:52,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:17:52,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:17:52,364 INFO L87 Difference]: Start difference. First operand 43846 states and 104805 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:52,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:52,587 INFO L93 Difference]: Finished difference Result 54955 states and 131607 transitions. [2021-02-19 17:17:52,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:17:52,588 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 17:17:52,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:52,667 INFO L225 Difference]: With dead ends: 54955 [2021-02-19 17:17:52,668 INFO L226 Difference]: Without dead ends: 54921 [2021-02-19 17:17:52,668 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:17:52,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54921 states. [2021-02-19 17:17:53,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54921 to 54598. [2021-02-19 17:17:53,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54598 states, 54597 states have (on average 2.3952781288349176) internal successors, (130775), 54597 states have internal predecessors, (130775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:53,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54598 states to 54598 states and 130775 transitions. [2021-02-19 17:17:53,913 INFO L78 Accepts]: Start accepts. Automaton has 54598 states and 130775 transitions. Word has length 39 [2021-02-19 17:17:53,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:53,913 INFO L480 AbstractCegarLoop]: Abstraction has 54598 states and 130775 transitions. [2021-02-19 17:17:53,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:53,914 INFO L276 IsEmpty]: Start isEmpty. Operand 54598 states and 130775 transitions. [2021-02-19 17:17:53,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 17:17:53,932 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:53,932 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:54,133 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:54,133 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:54,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:54,133 INFO L82 PathProgramCache]: Analyzing trace with hash 2089864464, now seen corresponding path program 96 times [2021-02-19 17:17:54,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:54,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326508292] [2021-02-19 17:17:54,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:54,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:54,170 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:17:54,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326508292] [2021-02-19 17:17:54,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689452392] [2021-02-19 17:17:54,170 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:54,188 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 17:17:54,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:54,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:17:54,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:54,248 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 17:17:54,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:54,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-02-19 17:17:54,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490244340] [2021-02-19 17:17:54,248 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:17:54,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:54,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:17:54,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:17:54,249 INFO L87 Difference]: Start difference. First operand 54598 states and 130775 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:54,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:54,452 INFO L93 Difference]: Finished difference Result 54798 states and 130742 transitions. [2021-02-19 17:17:54,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:17:54,453 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 17:17:54,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:54,522 INFO L225 Difference]: With dead ends: 54798 [2021-02-19 17:17:54,522 INFO L226 Difference]: Without dead ends: 54798 [2021-02-19 17:17:54,522 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:17:54,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54798 states. [2021-02-19 17:17:55,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54798 to 49862. [2021-02-19 17:17:55,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49862 states, 49861 states have (on average 2.3922705120234253) internal successors, (119281), 49861 states have internal predecessors, (119281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:55,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49862 states to 49862 states and 119281 transitions. [2021-02-19 17:17:55,276 INFO L78 Accepts]: Start accepts. Automaton has 49862 states and 119281 transitions. Word has length 39 [2021-02-19 17:17:55,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:55,276 INFO L480 AbstractCegarLoop]: Abstraction has 49862 states and 119281 transitions. [2021-02-19 17:17:55,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:55,276 INFO L276 IsEmpty]: Start isEmpty. Operand 49862 states and 119281 transitions. [2021-02-19 17:17:55,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 17:17:55,294 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:55,294 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:55,494 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-02-19 17:17:55,494 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:55,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:55,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1204265710, now seen corresponding path program 97 times [2021-02-19 17:17:55,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:55,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035738278] [2021-02-19 17:17:55,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:55,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:55,517 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:17:55,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035738278] [2021-02-19 17:17:55,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021407575] [2021-02-19 17:17:55,517 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:55,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:55,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:17:55,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:55,587 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 29 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:17:55,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:55,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-02-19 17:17:55,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095256907] [2021-02-19 17:17:55,588 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:17:55,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:55,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:17:55,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:17:55,588 INFO L87 Difference]: Start difference. First operand 49862 states and 119281 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:55,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:55,776 INFO L93 Difference]: Finished difference Result 51794 states and 123670 transitions. [2021-02-19 17:17:55,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:17:55,777 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 17:17:55,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:55,839 INFO L225 Difference]: With dead ends: 51794 [2021-02-19 17:17:55,839 INFO L226 Difference]: Without dead ends: 51790 [2021-02-19 17:17:55,839 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:17:55,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51790 states. [2021-02-19 17:17:56,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51790 to 51361. [2021-02-19 17:17:56,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51361 states, 51360 states have (on average 2.3916082554517133) internal successors, (122833), 51360 states have internal predecessors, (122833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:56,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51361 states to 51361 states and 122833 transitions. [2021-02-19 17:17:56,680 INFO L78 Accepts]: Start accepts. Automaton has 51361 states and 122833 transitions. Word has length 39 [2021-02-19 17:17:56,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:56,680 INFO L480 AbstractCegarLoop]: Abstraction has 51361 states and 122833 transitions. [2021-02-19 17:17:56,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:56,680 INFO L276 IsEmpty]: Start isEmpty. Operand 51361 states and 122833 transitions. [2021-02-19 17:17:56,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 17:17:56,698 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:56,698 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:56,898 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-02-19 17:17:56,898 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:56,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:56,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1609633450, now seen corresponding path program 98 times [2021-02-19 17:17:56,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:56,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940509727] [2021-02-19 17:17:56,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:56,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:56,927 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 17:17:56,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940509727] [2021-02-19 17:17:56,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391561446] [2021-02-19 17:17:56,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:17:56,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:17:56,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:56,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:17:56,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:57,044 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-02-19 17:17:57,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:57,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-02-19 17:17:57,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244125918] [2021-02-19 17:17:57,044 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:17:57,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:57,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:17:57,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:17:57,045 INFO L87 Difference]: Start difference. First operand 51361 states and 122833 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:57,289 WARN L202 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-02-19 17:17:57,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:57,441 INFO L93 Difference]: Finished difference Result 53808 states and 127704 transitions. [2021-02-19 17:17:57,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:17:57,441 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 17:17:57,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:57,512 INFO L225 Difference]: With dead ends: 53808 [2021-02-19 17:17:57,512 INFO L226 Difference]: Without dead ends: 53805 [2021-02-19 17:17:57,513 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:17:57,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53805 states. [2021-02-19 17:17:58,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53805 to 52349. [2021-02-19 17:17:58,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52349 states, 52348 states have (on average 2.3850576908382366) internal successors, (124853), 52348 states have internal predecessors, (124853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:58,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52349 states to 52349 states and 124853 transitions. [2021-02-19 17:17:58,464 INFO L78 Accepts]: Start accepts. Automaton has 52349 states and 124853 transitions. Word has length 39 [2021-02-19 17:17:58,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:58,464 INFO L480 AbstractCegarLoop]: Abstraction has 52349 states and 124853 transitions. [2021-02-19 17:17:58,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:58,464 INFO L276 IsEmpty]: Start isEmpty. Operand 52349 states and 124853 transitions. [2021-02-19 17:17:58,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 17:17:58,483 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:58,483 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:58,683 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-02-19 17:17:58,683 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:58,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:58,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1144319408, now seen corresponding path program 99 times [2021-02-19 17:17:58,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:58,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438301041] [2021-02-19 17:17:58,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:58,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:58,710 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:17:58,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438301041] [2021-02-19 17:17:58,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512202666] [2021-02-19 17:17:58,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:58,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:17:58,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:58,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:17:58,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:58,789 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 29 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 17:17:58,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:58,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-02-19 17:17:58,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242337872] [2021-02-19 17:17:58,790 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:17:58,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:58,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:17:58,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:17:58,790 INFO L87 Difference]: Start difference. First operand 52349 states and 124853 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:58,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:58,998 INFO L93 Difference]: Finished difference Result 52855 states and 124721 transitions. [2021-02-19 17:17:58,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:17:58,999 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 17:17:58,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:59,063 INFO L225 Difference]: With dead ends: 52855 [2021-02-19 17:17:59,063 INFO L226 Difference]: Without dead ends: 52852 [2021-02-19 17:17:59,064 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:17:59,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52852 states. [2021-02-19 17:17:59,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52852 to 50549. [2021-02-19 17:17:59,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50549 states, 50548 states have (on average 2.3744163962965894) internal successors, (120022), 50548 states have internal predecessors, (120022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:59,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50549 states to 50549 states and 120022 transitions. [2021-02-19 17:17:59,891 INFO L78 Accepts]: Start accepts. Automaton has 50549 states and 120022 transitions. Word has length 39 [2021-02-19 17:17:59,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:59,891 INFO L480 AbstractCegarLoop]: Abstraction has 50549 states and 120022 transitions. [2021-02-19 17:17:59,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:59,891 INFO L276 IsEmpty]: Start isEmpty. Operand 50549 states and 120022 transitions. [2021-02-19 17:17:59,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 17:17:59,910 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:59,910 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:00,110 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:00,110 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:00,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:00,110 INFO L82 PathProgramCache]: Analyzing trace with hash 339721488, now seen corresponding path program 100 times [2021-02-19 17:18:00,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:00,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853715405] [2021-02-19 17:18:00,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:00,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:00,139 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:18:00,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853715405] [2021-02-19 17:18:00,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14513531] [2021-02-19 17:18:00,140 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:00,156 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:18:00,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:00,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:18:00,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:00,211 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:18:00,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:00,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-02-19 17:18:00,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937069196] [2021-02-19 17:18:00,212 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:18:00,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:00,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:18:00,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:18:00,212 INFO L87 Difference]: Start difference. First operand 50549 states and 120022 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 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) [2021-02-19 17:18:00,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:00,411 INFO L93 Difference]: Finished difference Result 50891 states and 120586 transitions. [2021-02-19 17:18:00,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:18:00,412 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 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 39 [2021-02-19 17:18:00,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:00,476 INFO L225 Difference]: With dead ends: 50891 [2021-02-19 17:18:00,477 INFO L226 Difference]: Without dead ends: 50871 [2021-02-19 17:18:00,477 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:18:00,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50871 states. [2021-02-19 17:18:01,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50871 to 50523. [2021-02-19 17:18:01,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50523 states, 50522 states have (on average 2.3704326827916553) internal successors, (119759), 50522 states have internal predecessors, (119759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:01,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50523 states to 50523 states and 119759 transitions. [2021-02-19 17:18:01,403 INFO L78 Accepts]: Start accepts. Automaton has 50523 states and 119759 transitions. Word has length 39 [2021-02-19 17:18:01,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:01,403 INFO L480 AbstractCegarLoop]: Abstraction has 50523 states and 119759 transitions. [2021-02-19 17:18:01,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 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) [2021-02-19 17:18:01,403 INFO L276 IsEmpty]: Start isEmpty. Operand 50523 states and 119759 transitions. [2021-02-19 17:18:01,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 17:18:01,421 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:01,421 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:01,622 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:01,622 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:01,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:01,622 INFO L82 PathProgramCache]: Analyzing trace with hash 916803088, now seen corresponding path program 101 times [2021-02-19 17:18:01,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:01,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229017637] [2021-02-19 17:18:01,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:01,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:01,645 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:18:01,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229017637] [2021-02-19 17:18:01,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614348556] [2021-02-19 17:18:01,645 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:01,663 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 17:18:01,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:01,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:18:01,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:01,717 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 17:18:01,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:01,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-02-19 17:18:01,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936656646] [2021-02-19 17:18:01,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:18:01,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:01,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:18:01,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:18:01,718 INFO L87 Difference]: Start difference. First operand 50523 states and 119759 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:02,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:02,160 INFO L93 Difference]: Finished difference Result 51054 states and 120870 transitions. [2021-02-19 17:18:02,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:18:02,161 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 17:18:02,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:02,228 INFO L225 Difference]: With dead ends: 51054 [2021-02-19 17:18:02,229 INFO L226 Difference]: Without dead ends: 51050 [2021-02-19 17:18:02,229 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:18:02,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51050 states. [2021-02-19 17:18:02,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51050 to 50840. [2021-02-19 17:18:02,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50840 states, 50839 states have (on average 2.3698341824190092) internal successors, (120480), 50839 states have internal predecessors, (120480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:03,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50840 states to 50840 states and 120480 transitions. [2021-02-19 17:18:03,231 INFO L78 Accepts]: Start accepts. Automaton has 50840 states and 120480 transitions. Word has length 39 [2021-02-19 17:18:03,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:03,231 INFO L480 AbstractCegarLoop]: Abstraction has 50840 states and 120480 transitions. [2021-02-19 17:18:03,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:03,231 INFO L276 IsEmpty]: Start isEmpty. Operand 50840 states and 120480 transitions. [2021-02-19 17:18:03,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 17:18:03,252 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:03,252 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:03,461 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:03,462 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:03,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:03,462 INFO L82 PathProgramCache]: Analyzing trace with hash 511435348, now seen corresponding path program 102 times [2021-02-19 17:18:03,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:03,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871854183] [2021-02-19 17:18:03,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:03,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:03,485 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:18:03,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871854183] [2021-02-19 17:18:03,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533578246] [2021-02-19 17:18:03,485 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:03,502 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-02-19 17:18:03,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:03,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:18:03,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:03,560 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 17:18:03,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:03,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-02-19 17:18:03,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002313082] [2021-02-19 17:18:03,560 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:18:03,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:03,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:18:03,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:18:03,560 INFO L87 Difference]: Start difference. First operand 50840 states and 120480 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:03,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:03,760 INFO L93 Difference]: Finished difference Result 52488 states and 123817 transitions. [2021-02-19 17:18:03,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:18:03,761 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 17:18:03,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:03,832 INFO L225 Difference]: With dead ends: 52488 [2021-02-19 17:18:03,832 INFO L226 Difference]: Without dead ends: 52485 [2021-02-19 17:18:03,833 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:18:03,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52485 states. [2021-02-19 17:18:04,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52485 to 51238. [2021-02-19 17:18:04,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51238 states, 51237 states have (on average 2.3674493042137517) internal successors, (121301), 51237 states have internal predecessors, (121301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:04,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51238 states to 51238 states and 121301 transitions. [2021-02-19 17:18:04,686 INFO L78 Accepts]: Start accepts. Automaton has 51238 states and 121301 transitions. Word has length 39 [2021-02-19 17:18:04,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:04,686 INFO L480 AbstractCegarLoop]: Abstraction has 51238 states and 121301 transitions. [2021-02-19 17:18:04,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:04,686 INFO L276 IsEmpty]: Start isEmpty. Operand 51238 states and 121301 transitions. [2021-02-19 17:18:04,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 17:18:04,705 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:04,705 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:04,905 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-02-19 17:18:04,905 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:04,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:04,905 INFO L82 PathProgramCache]: Analyzing trace with hash 976749390, now seen corresponding path program 103 times [2021-02-19 17:18:04,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:04,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484051637] [2021-02-19 17:18:04,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:04,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:04,929 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 17:18:04,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484051637] [2021-02-19 17:18:04,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565678206] [2021-02-19 17:18:04,930 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:04,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:04,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:18:04,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:05,010 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 31 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 17:18:05,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:05,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-02-19 17:18:05,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269504042] [2021-02-19 17:18:05,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:18:05,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:05,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:18:05,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:18:05,011 INFO L87 Difference]: Start difference. First operand 51238 states and 121301 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:05,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:05,229 INFO L93 Difference]: Finished difference Result 52380 states and 123468 transitions. [2021-02-19 17:18:05,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:18:05,230 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 17:18:05,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:05,296 INFO L225 Difference]: With dead ends: 52380 [2021-02-19 17:18:05,297 INFO L226 Difference]: Without dead ends: 52368 [2021-02-19 17:18:05,297 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:18:05,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52368 states. [2021-02-19 17:18:05,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52368 to 51650. [2021-02-19 17:18:06,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51650 states, 51649 states have (on average 2.361807585819667) internal successors, (121985), 51649 states have internal predecessors, (121985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:06,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51650 states to 51650 states and 121985 transitions. [2021-02-19 17:18:06,115 INFO L78 Accepts]: Start accepts. Automaton has 51650 states and 121985 transitions. Word has length 39 [2021-02-19 17:18:06,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:06,116 INFO L480 AbstractCegarLoop]: Abstraction has 51650 states and 121985 transitions. [2021-02-19 17:18:06,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:06,116 INFO L276 IsEmpty]: Start isEmpty. Operand 51650 states and 121985 transitions. [2021-02-19 17:18:06,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 17:18:06,134 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:06,134 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:06,334 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-02-19 17:18:06,334 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:06,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:06,335 INFO L82 PathProgramCache]: Analyzing trace with hash -355901040, now seen corresponding path program 104 times [2021-02-19 17:18:06,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:06,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967739070] [2021-02-19 17:18:06,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:06,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:06,364 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:18:06,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967739070] [2021-02-19 17:18:06,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514117420] [2021-02-19 17:18:06,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:06,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:18:06,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:06,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:18:06,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:06,444 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 30 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:18:06,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:06,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-02-19 17:18:06,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604979244] [2021-02-19 17:18:06,444 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:18:06,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:06,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:18:06,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:18:06,444 INFO L87 Difference]: Start difference. First operand 51650 states and 121985 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:06,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:06,665 INFO L93 Difference]: Finished difference Result 51895 states and 122112 transitions. [2021-02-19 17:18:06,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:18:06,666 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 17:18:06,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:06,729 INFO L225 Difference]: With dead ends: 51895 [2021-02-19 17:18:06,730 INFO L226 Difference]: Without dead ends: 51883 [2021-02-19 17:18:06,730 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:18:06,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51883 states. [2021-02-19 17:18:07,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51883 to 50789. [2021-02-19 17:18:07,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50789 states, 50788 states have (on average 2.3598684728676065) internal successors, (119853), 50788 states have internal predecessors, (119853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:07,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50789 states to 50789 states and 119853 transitions. [2021-02-19 17:18:07,666 INFO L78 Accepts]: Start accepts. Automaton has 50789 states and 119853 transitions. Word has length 39 [2021-02-19 17:18:07,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:07,666 INFO L480 AbstractCegarLoop]: Abstraction has 50789 states and 119853 transitions. [2021-02-19 17:18:07,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:07,666 INFO L276 IsEmpty]: Start isEmpty. Operand 50789 states and 119853 transitions. [2021-02-19 17:18:07,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-02-19 17:18:07,685 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:07,685 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:07,885 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-02-19 17:18:07,885 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:07,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:07,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1175416454, now seen corresponding path program 7 times [2021-02-19 17:18:07,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:07,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049155328] [2021-02-19 17:18:07,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:07,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:07,993 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 3 proven. 29 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-02-19 17:18:07,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049155328] [2021-02-19 17:18:07,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340786022] [2021-02-19 17:18:07,994 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:08,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:08,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:18:08,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:08,190 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-02-19 17:18:08,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:08,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-02-19 17:18:08,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841135001] [2021-02-19 17:18:08,190 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:18:08,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:08,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:18:08,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:18:08,191 INFO L87 Difference]: Start difference. First operand 50789 states and 119853 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:08,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:08,708 INFO L93 Difference]: Finished difference Result 50941 states and 120174 transitions. [2021-02-19 17:18:08,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:18:08,709 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-02-19 17:18:08,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:08,776 INFO L225 Difference]: With dead ends: 50941 [2021-02-19 17:18:08,776 INFO L226 Difference]: Without dead ends: 50818 [2021-02-19 17:18:08,777 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:18:09,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50818 states. [2021-02-19 17:18:09,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50818 to 50804. [2021-02-19 17:18:09,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50804 states, 50803 states have (on average 2.3597622187666083) internal successors, (119883), 50803 states have internal predecessors, (119883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:09,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50804 states to 50804 states and 119883 transitions. [2021-02-19 17:18:09,627 INFO L78 Accepts]: Start accepts. Automaton has 50804 states and 119883 transitions. Word has length 40 [2021-02-19 17:18:09,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:09,627 INFO L480 AbstractCegarLoop]: Abstraction has 50804 states and 119883 transitions. [2021-02-19 17:18:09,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:09,628 INFO L276 IsEmpty]: Start isEmpty. Operand 50804 states and 119883 transitions. [2021-02-19 17:18:09,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 17:18:09,647 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:09,647 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:09,847 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-02-19 17:18:09,847 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:09,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:09,848 INFO L82 PathProgramCache]: Analyzing trace with hash 268708980, now seen corresponding path program 105 times [2021-02-19 17:18:09,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:09,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46334236] [2021-02-19 17:18:09,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:09,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:09,904 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 4 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:18:09,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46334236] [2021-02-19 17:18:09,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602292057] [2021-02-19 17:18:09,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:09,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-02-19 17:18:09,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:09,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2021-02-19 17:18:09,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:10,049 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 29 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:18:10,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:10,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-02-19 17:18:10,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932047168] [2021-02-19 17:18:10,049 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:18:10,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:10,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:18:10,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:18:10,049 INFO L87 Difference]: Start difference. First operand 50804 states and 119883 transitions. Second operand has 17 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:10,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:10,631 INFO L93 Difference]: Finished difference Result 54165 states and 126813 transitions. [2021-02-19 17:18:10,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:18:10,632 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 17:18:10,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:10,698 INFO L225 Difference]: With dead ends: 54165 [2021-02-19 17:18:10,698 INFO L226 Difference]: Without dead ends: 54165 [2021-02-19 17:18:10,698 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:18:10,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54165 states. [2021-02-19 17:18:11,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54165 to 36411. [2021-02-19 17:18:11,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36411 states, 36410 states have (on average 2.3365558912386706) internal successors, (85074), 36410 states have internal predecessors, (85074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:11,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36411 states to 36411 states and 85074 transitions. [2021-02-19 17:18:11,209 INFO L78 Accepts]: Start accepts. Automaton has 36411 states and 85074 transitions. Word has length 41 [2021-02-19 17:18:11,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:11,209 INFO L480 AbstractCegarLoop]: Abstraction has 36411 states and 85074 transitions. [2021-02-19 17:18:11,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:11,209 INFO L276 IsEmpty]: Start isEmpty. Operand 36411 states and 85074 transitions. [2021-02-19 17:18:11,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 17:18:11,230 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:11,230 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:11,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-02-19 17:18:11,440 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:11,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:11,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1144497492, now seen corresponding path program 106 times [2021-02-19 17:18:11,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:11,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192150036] [2021-02-19 17:18:11,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:11,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:11,498 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 24 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:18:11,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192150036] [2021-02-19 17:18:11,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196555929] [2021-02-19 17:18:11,498 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:11,515 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:18:11,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:11,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2021-02-19 17:18:11,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:11,636 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:18:11,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:11,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-02-19 17:18:11,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490399287] [2021-02-19 17:18:11,636 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:18:11,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:11,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:18:11,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:18:11,637 INFO L87 Difference]: Start difference. First operand 36411 states and 85074 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:12,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:12,165 INFO L93 Difference]: Finished difference Result 34622 states and 78133 transitions. [2021-02-19 17:18:12,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:18:12,166 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 [2021-02-19 17:18:12,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:12,203 INFO L225 Difference]: With dead ends: 34622 [2021-02-19 17:18:12,203 INFO L226 Difference]: Without dead ends: 34550 [2021-02-19 17:18:12,203 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:18:12,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34550 states. [2021-02-19 17:18:12,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34550 to 32785. [2021-02-19 17:18:12,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32785 states, 32784 states have (on average 2.226634943875061) internal successors, (72998), 32784 states have internal predecessors, (72998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:12,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32785 states to 32785 states and 72998 transitions. [2021-02-19 17:18:12,569 INFO L78 Accepts]: Start accepts. Automaton has 32785 states and 72998 transitions. Word has length 41 [2021-02-19 17:18:12,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:12,569 INFO L480 AbstractCegarLoop]: Abstraction has 32785 states and 72998 transitions. [2021-02-19 17:18:12,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:12,570 INFO L276 IsEmpty]: Start isEmpty. Operand 32785 states and 72998 transitions. [2021-02-19 17:18:12,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-19 17:18:12,587 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:12,587 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:12,787 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:12,788 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:12,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:12,788 INFO L82 PathProgramCache]: Analyzing trace with hash 736461407, now seen corresponding path program 107 times [2021-02-19 17:18:12,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:12,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799849523] [2021-02-19 17:18:12,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:12,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:12,943 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:18:12,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799849523] [2021-02-19 17:18:12,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555252564] [2021-02-19 17:18:12,944 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:12,962 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 17:18:12,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:12,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:18:12,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:13,215 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:13,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:13,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-02-19 17:18:13,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058941751] [2021-02-19 17:18:13,215 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 17:18:13,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:13,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 17:18:13,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:18:13,216 INFO L87 Difference]: Start difference. First operand 32785 states and 72998 transitions. Second operand has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:14,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:14,273 INFO L93 Difference]: Finished difference Result 33955 states and 75388 transitions. [2021-02-19 17:18:14,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:18:14,274 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-02-19 17:18:14,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:14,310 INFO L225 Difference]: With dead ends: 33955 [2021-02-19 17:18:14,310 INFO L226 Difference]: Without dead ends: 33895 [2021-02-19 17:18:14,310 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=147, Invalid=975, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 17:18:14,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33895 states. [2021-02-19 17:18:14,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33895 to 33327. [2021-02-19 17:18:14,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33327 states, 33326 states have (on average 2.2281701974434376) internal successors, (74256), 33326 states have internal predecessors, (74256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:14,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33327 states to 33327 states and 74256 transitions. [2021-02-19 17:18:14,729 INFO L78 Accepts]: Start accepts. Automaton has 33327 states and 74256 transitions. Word has length 42 [2021-02-19 17:18:14,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:14,729 INFO L480 AbstractCegarLoop]: Abstraction has 33327 states and 74256 transitions. [2021-02-19 17:18:14,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:14,729 INFO L276 IsEmpty]: Start isEmpty. Operand 33327 states and 74256 transitions. [2021-02-19 17:18:14,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-19 17:18:14,746 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:14,746 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:14,946 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-02-19 17:18:14,946 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:14,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:14,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1166140567, now seen corresponding path program 108 times [2021-02-19 17:18:14,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:14,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100540972] [2021-02-19 17:18:14,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:14,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:15,104 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:18:15,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100540972] [2021-02-19 17:18:15,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70590075] [2021-02-19 17:18:15,104 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:15,122 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-02-19 17:18:15,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:15,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:18:15,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:15,373 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:15,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:15,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-02-19 17:18:15,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26153061] [2021-02-19 17:18:15,374 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 17:18:15,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:15,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 17:18:15,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:18:15,374 INFO L87 Difference]: Start difference. First operand 33327 states and 74256 transitions. Second operand has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:16,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:16,147 INFO L93 Difference]: Finished difference Result 34237 states and 76081 transitions. [2021-02-19 17:18:16,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 17:18:16,148 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-02-19 17:18:16,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:16,188 INFO L225 Difference]: With dead ends: 34237 [2021-02-19 17:18:16,188 INFO L226 Difference]: Without dead ends: 34177 [2021-02-19 17:18:16,188 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=155, Invalid=1035, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 17:18:16,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34177 states. [2021-02-19 17:18:16,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34177 to 33689. [2021-02-19 17:18:16,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33689 states, 33688 states have (on average 2.2294585609118975) internal successors, (75106), 33688 states have internal predecessors, (75106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:16,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33689 states to 33689 states and 75106 transitions. [2021-02-19 17:18:16,559 INFO L78 Accepts]: Start accepts. Automaton has 33689 states and 75106 transitions. Word has length 42 [2021-02-19 17:18:16,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:16,559 INFO L480 AbstractCegarLoop]: Abstraction has 33689 states and 75106 transitions. [2021-02-19 17:18:16,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:16,559 INFO L276 IsEmpty]: Start isEmpty. Operand 33689 states and 75106 transitions. [2021-02-19 17:18:16,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-19 17:18:16,577 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:16,577 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:16,779 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:16,779 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:16,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:16,779 INFO L82 PathProgramCache]: Analyzing trace with hash -660647329, now seen corresponding path program 109 times [2021-02-19 17:18:16,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:16,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644737493] [2021-02-19 17:18:16,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:16,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:16,930 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:18:16,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644737493] [2021-02-19 17:18:16,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407641939] [2021-02-19 17:18:16,931 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:16,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:16,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:18:16,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:17,186 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:17,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:17,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-02-19 17:18:17,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025730116] [2021-02-19 17:18:17,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 17:18:17,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:17,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 17:18:17,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:18:17,187 INFO L87 Difference]: Start difference. First operand 33689 states and 75106 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:17,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:17,973 INFO L93 Difference]: Finished difference Result 35020 states and 77856 transitions. [2021-02-19 17:18:17,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 17:18:17,974 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-02-19 17:18:17,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:18,010 INFO L225 Difference]: With dead ends: 35020 [2021-02-19 17:18:18,010 INFO L226 Difference]: Without dead ends: 34968 [2021-02-19 17:18:18,010 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:18:18,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34968 states. [2021-02-19 17:18:18,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34968 to 33824. [2021-02-19 17:18:18,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33824 states, 33823 states have (on average 2.2299618602725957) internal successors, (75424), 33823 states have internal predecessors, (75424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:18,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33824 states to 33824 states and 75424 transitions. [2021-02-19 17:18:18,364 INFO L78 Accepts]: Start accepts. Automaton has 33824 states and 75424 transitions. Word has length 42 [2021-02-19 17:18:18,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:18,364 INFO L480 AbstractCegarLoop]: Abstraction has 33824 states and 75424 transitions. [2021-02-19 17:18:18,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:18,364 INFO L276 IsEmpty]: Start isEmpty. Operand 33824 states and 75424 transitions. [2021-02-19 17:18:18,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-19 17:18:18,382 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:18,382 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:18,582 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:18,582 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:18,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:18,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1922869865, now seen corresponding path program 110 times [2021-02-19 17:18:18,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:18,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51541821] [2021-02-19 17:18:18,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:18,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:18,729 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:18:18,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51541821] [2021-02-19 17:18:18,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519006981] [2021-02-19 17:18:18,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:18,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:18:18,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:18,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:18:18,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:19,016 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:19,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:19,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-02-19 17:18:19,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31481554] [2021-02-19 17:18:19,017 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 17:18:19,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:19,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 17:18:19,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:18:19,017 INFO L87 Difference]: Start difference. First operand 33824 states and 75424 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:19,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:19,628 INFO L93 Difference]: Finished difference Result 35348 states and 78730 transitions. [2021-02-19 17:18:19,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:18:19,629 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-02-19 17:18:19,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:19,666 INFO L225 Difference]: With dead ends: 35348 [2021-02-19 17:18:19,666 INFO L226 Difference]: Without dead ends: 35287 [2021-02-19 17:18:19,666 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:18:19,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35287 states. [2021-02-19 17:18:19,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35287 to 34771. [2021-02-19 17:18:19,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34771 states, 34770 states have (on average 2.23264308311763) internal successors, (77629), 34770 states have internal predecessors, (77629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:20,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34771 states to 34771 states and 77629 transitions. [2021-02-19 17:18:20,032 INFO L78 Accepts]: Start accepts. Automaton has 34771 states and 77629 transitions. Word has length 42 [2021-02-19 17:18:20,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:20,032 INFO L480 AbstractCegarLoop]: Abstraction has 34771 states and 77629 transitions. [2021-02-19 17:18:20,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:20,032 INFO L276 IsEmpty]: Start isEmpty. Operand 34771 states and 77629 transitions. [2021-02-19 17:18:20,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-19 17:18:20,049 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:20,049 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:20,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable120 [2021-02-19 17:18:20,250 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:20,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:20,250 INFO L82 PathProgramCache]: Analyzing trace with hash 92537183, now seen corresponding path program 111 times [2021-02-19 17:18:20,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:20,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664194238] [2021-02-19 17:18:20,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:20,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:20,418 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:18:20,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664194238] [2021-02-19 17:18:20,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463126454] [2021-02-19 17:18:20,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:20,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-02-19 17:18:20,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:20,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:18:20,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:20,705 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:20,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:20,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-02-19 17:18:20,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335673599] [2021-02-19 17:18:20,705 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 17:18:20,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:20,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 17:18:20,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:18:20,706 INFO L87 Difference]: Start difference. First operand 34771 states and 77629 transitions. Second operand has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 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) [2021-02-19 17:18:21,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:21,542 INFO L93 Difference]: Finished difference Result 37628 states and 83716 transitions. [2021-02-19 17:18:21,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 17:18:21,543 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 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 42 [2021-02-19 17:18:21,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:21,582 INFO L225 Difference]: With dead ends: 37628 [2021-02-19 17:18:21,582 INFO L226 Difference]: Without dead ends: 37564 [2021-02-19 17:18:21,582 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 17:18:21,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37564 states. [2021-02-19 17:18:21,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37564 to 36693. [2021-02-19 17:18:21,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36693 states, 36692 states have (on average 2.234928594789055) internal successors, (82004), 36692 states have internal predecessors, (82004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:21,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36693 states to 36693 states and 82004 transitions. [2021-02-19 17:18:21,978 INFO L78 Accepts]: Start accepts. Automaton has 36693 states and 82004 transitions. Word has length 42 [2021-02-19 17:18:21,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:21,978 INFO L480 AbstractCegarLoop]: Abstraction has 36693 states and 82004 transitions. [2021-02-19 17:18:21,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 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) [2021-02-19 17:18:21,978 INFO L276 IsEmpty]: Start isEmpty. Operand 36693 states and 82004 transitions. [2021-02-19 17:18:21,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-19 17:18:21,996 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:21,996 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:22,198 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:22,198 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:22,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:22,198 INFO L82 PathProgramCache]: Analyzing trace with hash 2131135301, now seen corresponding path program 112 times [2021-02-19 17:18:22,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:22,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956887977] [2021-02-19 17:18:22,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:22,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:22,374 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:18:22,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956887977] [2021-02-19 17:18:22,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077692804] [2021-02-19 17:18:22,374 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:22,391 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:18:22,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:22,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:18:22,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:22,625 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:22,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:22,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-02-19 17:18:22,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054655526] [2021-02-19 17:18:22,626 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 17:18:22,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:22,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 17:18:22,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:18:22,626 INFO L87 Difference]: Start difference. First operand 36693 states and 82004 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:23,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:23,390 INFO L93 Difference]: Finished difference Result 37468 states and 83561 transitions. [2021-02-19 17:18:23,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 17:18:23,391 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-02-19 17:18:23,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:23,429 INFO L225 Difference]: With dead ends: 37468 [2021-02-19 17:18:23,429 INFO L226 Difference]: Without dead ends: 37424 [2021-02-19 17:18:23,430 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:18:23,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37424 states. [2021-02-19 17:18:23,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37424 to 36988. [2021-02-19 17:18:23,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36988 states, 36987 states have (on average 2.2359207289047505) internal successors, (82700), 36987 states have internal predecessors, (82700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:23,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36988 states to 36988 states and 82700 transitions. [2021-02-19 17:18:23,826 INFO L78 Accepts]: Start accepts. Automaton has 36988 states and 82700 transitions. Word has length 42 [2021-02-19 17:18:23,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:23,826 INFO L480 AbstractCegarLoop]: Abstraction has 36988 states and 82700 transitions. [2021-02-19 17:18:23,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:23,826 INFO L276 IsEmpty]: Start isEmpty. Operand 36988 states and 82700 transitions. [2021-02-19 17:18:23,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-19 17:18:23,846 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:23,846 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:24,046 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:24,046 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:24,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:24,047 INFO L82 PathProgramCache]: Analyzing trace with hash 552049453, now seen corresponding path program 113 times [2021-02-19 17:18:24,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:24,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140712799] [2021-02-19 17:18:24,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:24,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:24,198 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:18:24,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140712799] [2021-02-19 17:18:24,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031927449] [2021-02-19 17:18:24,198 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:24,217 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 17:18:24,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:24,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:18:24,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:24,473 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:24,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:24,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-02-19 17:18:24,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571624819] [2021-02-19 17:18:24,474 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 17:18:24,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:24,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 17:18:24,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:18:24,474 INFO L87 Difference]: Start difference. First operand 36988 states and 82700 transitions. Second operand has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:25,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:25,368 INFO L93 Difference]: Finished difference Result 37883 states and 84505 transitions. [2021-02-19 17:18:25,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 17:18:25,368 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-02-19 17:18:25,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:25,411 INFO L225 Difference]: With dead ends: 37883 [2021-02-19 17:18:25,411 INFO L226 Difference]: Without dead ends: 37825 [2021-02-19 17:18:25,411 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=164, Invalid=1168, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 17:18:25,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37825 states. [2021-02-19 17:18:25,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37825 to 37336. [2021-02-19 17:18:25,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37336 states, 37335 states have (on average 2.2370162046337216) internal successors, (83519), 37335 states have internal predecessors, (83519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:25,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37336 states to 37336 states and 83519 transitions. [2021-02-19 17:18:25,828 INFO L78 Accepts]: Start accepts. Automaton has 37336 states and 83519 transitions. Word has length 42 [2021-02-19 17:18:25,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:25,828 INFO L480 AbstractCegarLoop]: Abstraction has 37336 states and 83519 transitions. [2021-02-19 17:18:25,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:25,828 INFO L276 IsEmpty]: Start isEmpty. Operand 37336 states and 83519 transitions. [2021-02-19 17:18:25,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-19 17:18:25,847 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:25,847 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:26,047 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-02-19 17:18:26,048 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:26,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:26,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1274738443, now seen corresponding path program 114 times [2021-02-19 17:18:26,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:26,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147063834] [2021-02-19 17:18:26,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:26,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:26,200 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:18:26,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147063834] [2021-02-19 17:18:26,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410996410] [2021-02-19 17:18:26,200 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:26,219 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 17:18:26,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:26,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:18:26,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:26,480 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:18:26,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:26,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-02-19 17:18:26,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311854922] [2021-02-19 17:18:26,480 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 17:18:26,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:26,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 17:18:26,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:18:26,481 INFO L87 Difference]: Start difference. First operand 37336 states and 83519 transitions. Second operand has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:27,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:27,578 INFO L93 Difference]: Finished difference Result 42560 states and 95111 transitions. [2021-02-19 17:18:27,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 17:18:27,579 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-02-19 17:18:27,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:27,618 INFO L225 Difference]: With dead ends: 42560 [2021-02-19 17:18:27,618 INFO L226 Difference]: Without dead ends: 42505 [2021-02-19 17:18:27,618 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=133, Invalid=989, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 17:18:27,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42505 states. [2021-02-19 17:18:27,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42505 to 41364. [2021-02-19 17:18:28,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41364 states, 41363 states have (on average 2.2458477383168534) internal successors, (92895), 41363 states have internal predecessors, (92895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:28,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41364 states to 41364 states and 92895 transitions. [2021-02-19 17:18:28,077 INFO L78 Accepts]: Start accepts. Automaton has 41364 states and 92895 transitions. Word has length 42 [2021-02-19 17:18:28,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:28,077 INFO L480 AbstractCegarLoop]: Abstraction has 41364 states and 92895 transitions. [2021-02-19 17:18:28,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:28,077 INFO L276 IsEmpty]: Start isEmpty. Operand 41364 states and 92895 transitions. [2021-02-19 17:18:28,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-19 17:18:28,097 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:28,097 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:28,297 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:28,297 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:28,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:28,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1758006317, now seen corresponding path program 115 times [2021-02-19 17:18:28,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:28,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388294903] [2021-02-19 17:18:28,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:28,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:28,448 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:18:28,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388294903] [2021-02-19 17:18:28,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749816369] [2021-02-19 17:18:28,449 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:28,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:28,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:18:28,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:28,743 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:28,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:28,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-02-19 17:18:28,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112145026] [2021-02-19 17:18:28,743 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 17:18:28,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:28,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 17:18:28,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:18:28,744 INFO L87 Difference]: Start difference. First operand 41364 states and 92895 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:29,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:29,321 INFO L93 Difference]: Finished difference Result 42177 states and 94600 transitions. [2021-02-19 17:18:29,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:18:29,322 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-02-19 17:18:29,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:29,368 INFO L225 Difference]: With dead ends: 42177 [2021-02-19 17:18:29,368 INFO L226 Difference]: Without dead ends: 42122 [2021-02-19 17:18:29,368 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:18:29,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42122 states. [2021-02-19 17:18:29,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42122 to 41392. [2021-02-19 17:18:29,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41392 states, 41391 states have (on average 2.2448599937184412) internal successors, (92917), 41391 states have internal predecessors, (92917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:29,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41392 states to 41392 states and 92917 transitions. [2021-02-19 17:18:29,896 INFO L78 Accepts]: Start accepts. Automaton has 41392 states and 92917 transitions. Word has length 42 [2021-02-19 17:18:29,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:29,896 INFO L480 AbstractCegarLoop]: Abstraction has 41392 states and 92917 transitions. [2021-02-19 17:18:29,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:29,897 INFO L276 IsEmpty]: Start isEmpty. Operand 41392 states and 92917 transitions. [2021-02-19 17:18:29,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-19 17:18:29,916 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:29,916 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:30,116 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-02-19 17:18:30,117 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:30,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:30,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1789011109, now seen corresponding path program 116 times [2021-02-19 17:18:30,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:30,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153834394] [2021-02-19 17:18:30,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:30,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:30,264 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:18:30,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153834394] [2021-02-19 17:18:30,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730463250] [2021-02-19 17:18:30,264 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:30,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:18:30,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:30,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:18:30,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:30,555 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:18:30,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:30,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-02-19 17:18:30,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959646325] [2021-02-19 17:18:30,555 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 17:18:30,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:30,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 17:18:30,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:18:30,556 INFO L87 Difference]: Start difference. First operand 41392 states and 92917 transitions. Second operand has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:31,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:31,212 INFO L93 Difference]: Finished difference Result 43200 states and 96836 transitions. [2021-02-19 17:18:31,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:18:31,213 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-02-19 17:18:31,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:31,265 INFO L225 Difference]: With dead ends: 43200 [2021-02-19 17:18:31,265 INFO L226 Difference]: Without dead ends: 43139 [2021-02-19 17:18:31,265 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:18:31,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43139 states. [2021-02-19 17:18:31,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43139 to 42274. [2021-02-19 17:18:31,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42274 states, 42273 states have (on average 2.245641425969295) internal successors, (94930), 42273 states have internal predecessors, (94930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:31,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42274 states to 42274 states and 94930 transitions. [2021-02-19 17:18:31,893 INFO L78 Accepts]: Start accepts. Automaton has 42274 states and 94930 transitions. Word has length 42 [2021-02-19 17:18:31,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:31,893 INFO L480 AbstractCegarLoop]: Abstraction has 42274 states and 94930 transitions. [2021-02-19 17:18:31,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:31,893 INFO L276 IsEmpty]: Start isEmpty. Operand 42274 states and 94930 transitions. [2021-02-19 17:18:31,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-19 17:18:31,914 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:31,914 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:32,117 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:32,118 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:32,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:32,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1474340951, now seen corresponding path program 117 times [2021-02-19 17:18:32,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:32,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488510406] [2021-02-19 17:18:32,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:32,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:32,269 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:18:32,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488510406] [2021-02-19 17:18:32,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514761501] [2021-02-19 17:18:32,269 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:32,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 17:18:32,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:32,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:18:32,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:32,585 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:32,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:32,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-02-19 17:18:32,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640315682] [2021-02-19 17:18:32,586 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 17:18:32,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:32,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 17:18:32,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:18:32,586 INFO L87 Difference]: Start difference. First operand 42274 states and 94930 transitions. Second operand has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 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) [2021-02-19 17:18:33,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:33,651 INFO L93 Difference]: Finished difference Result 43593 states and 97722 transitions. [2021-02-19 17:18:33,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 17:18:33,651 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 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 42 [2021-02-19 17:18:33,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:33,700 INFO L225 Difference]: With dead ends: 43593 [2021-02-19 17:18:33,700 INFO L226 Difference]: Without dead ends: 43522 [2021-02-19 17:18:33,700 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=140, Invalid=1192, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 17:18:33,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43522 states. [2021-02-19 17:18:34,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43522 to 42894. [2021-02-19 17:18:34,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42894 states, 42893 states have (on average 2.2458443102604155) internal successors, (96331), 42893 states have internal predecessors, (96331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:34,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42894 states to 42894 states and 96331 transitions. [2021-02-19 17:18:34,166 INFO L78 Accepts]: Start accepts. Automaton has 42894 states and 96331 transitions. Word has length 42 [2021-02-19 17:18:34,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:34,166 INFO L480 AbstractCegarLoop]: Abstraction has 42894 states and 96331 transitions. [2021-02-19 17:18:34,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 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) [2021-02-19 17:18:34,166 INFO L276 IsEmpty]: Start isEmpty. Operand 42894 states and 96331 transitions. [2021-02-19 17:18:34,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-19 17:18:34,187 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:34,187 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:34,389 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-02-19 17:18:34,389 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:34,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:34,389 INFO L82 PathProgramCache]: Analyzing trace with hash -2067441833, now seen corresponding path program 118 times [2021-02-19 17:18:34,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:34,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533232087] [2021-02-19 17:18:34,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:34,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:34,534 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:18:34,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533232087] [2021-02-19 17:18:34,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276831927] [2021-02-19 17:18:34,535 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:34,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:18:34,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:34,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:18:34,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:34,832 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:18:34,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:34,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-02-19 17:18:34,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581838873] [2021-02-19 17:18:34,832 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 17:18:34,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:34,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 17:18:34,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:18:34,833 INFO L87 Difference]: Start difference. First operand 42894 states and 96331 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:35,035 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 18 [2021-02-19 17:18:35,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:35,665 INFO L93 Difference]: Finished difference Result 44838 states and 100520 transitions. [2021-02-19 17:18:35,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:18:35,666 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-02-19 17:18:35,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:35,716 INFO L225 Difference]: With dead ends: 44838 [2021-02-19 17:18:35,716 INFO L226 Difference]: Without dead ends: 44755 [2021-02-19 17:18:35,716 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 17:18:35,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44755 states. [2021-02-19 17:18:36,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44755 to 42260. [2021-02-19 17:18:36,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42260 states, 42259 states have (on average 2.245367850635368) internal successors, (94887), 42259 states have internal predecessors, (94887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:36,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42260 states to 42260 states and 94887 transitions. [2021-02-19 17:18:36,180 INFO L78 Accepts]: Start accepts. Automaton has 42260 states and 94887 transitions. Word has length 42 [2021-02-19 17:18:36,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:36,180 INFO L480 AbstractCegarLoop]: Abstraction has 42260 states and 94887 transitions. [2021-02-19 17:18:36,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:36,181 INFO L276 IsEmpty]: Start isEmpty. Operand 42260 states and 94887 transitions. [2021-02-19 17:18:36,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-19 17:18:36,201 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:36,201 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:36,401 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:36,401 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:36,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:36,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1418810391, now seen corresponding path program 119 times [2021-02-19 17:18:36,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:36,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976078626] [2021-02-19 17:18:36,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:36,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:36,546 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:18:36,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976078626] [2021-02-19 17:18:36,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202401306] [2021-02-19 17:18:36,547 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:36,568 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-02-19 17:18:36,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:36,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:18:36,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:37,094 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:18:37,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:37,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-02-19 17:18:37,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017379512] [2021-02-19 17:18:37,094 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 17:18:37,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:37,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 17:18:37,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:18:37,095 INFO L87 Difference]: Start difference. First operand 42260 states and 94887 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:37,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:37,768 INFO L93 Difference]: Finished difference Result 45004 states and 100851 transitions. [2021-02-19 17:18:37,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:18:37,768 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-02-19 17:18:37,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:37,818 INFO L225 Difference]: With dead ends: 45004 [2021-02-19 17:18:37,818 INFO L226 Difference]: Without dead ends: 44951 [2021-02-19 17:18:37,818 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 17:18:37,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44951 states. [2021-02-19 17:18:38,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44951 to 44047. [2021-02-19 17:18:38,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44047 states, 44046 states have (on average 2.2477182945102845) internal successors, (99003), 44046 states have internal predecessors, (99003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:38,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44047 states to 44047 states and 99003 transitions. [2021-02-19 17:18:38,505 INFO L78 Accepts]: Start accepts. Automaton has 44047 states and 99003 transitions. Word has length 42 [2021-02-19 17:18:38,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:38,505 INFO L480 AbstractCegarLoop]: Abstraction has 44047 states and 99003 transitions. [2021-02-19 17:18:38,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:38,505 INFO L276 IsEmpty]: Start isEmpty. Operand 44047 states and 99003 transitions. [2021-02-19 17:18:38,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-19 17:18:38,526 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:38,526 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:38,730 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-02-19 17:18:38,730 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:38,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:38,730 INFO L82 PathProgramCache]: Analyzing trace with hash 182168753, now seen corresponding path program 120 times [2021-02-19 17:18:38,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:38,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537849338] [2021-02-19 17:18:38,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:38,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:38,920 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:18:38,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537849338] [2021-02-19 17:18:38,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914223575] [2021-02-19 17:18:38,920 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:38,957 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-02-19 17:18:38,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:38,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:18:38,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:39,273 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:39,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:39,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-02-19 17:18:39,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095454037] [2021-02-19 17:18:39,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 17:18:39,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:39,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 17:18:39,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:18:39,274 INFO L87 Difference]: Start difference. First operand 44047 states and 99003 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:40,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:40,148 INFO L93 Difference]: Finished difference Result 47479 states and 106568 transitions. [2021-02-19 17:18:40,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:18:40,149 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-02-19 17:18:40,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:40,204 INFO L225 Difference]: With dead ends: 47479 [2021-02-19 17:18:40,204 INFO L226 Difference]: Without dead ends: 47408 [2021-02-19 17:18:40,204 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2021-02-19 17:18:40,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47408 states. [2021-02-19 17:18:40,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47408 to 43786. [2021-02-19 17:18:40,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43786 states, 43785 states have (on average 2.247847436336645) internal successors, (98422), 43785 states have internal predecessors, (98422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:40,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43786 states to 43786 states and 98422 transitions. [2021-02-19 17:18:40,826 INFO L78 Accepts]: Start accepts. Automaton has 43786 states and 98422 transitions. Word has length 42 [2021-02-19 17:18:40,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:40,826 INFO L480 AbstractCegarLoop]: Abstraction has 43786 states and 98422 transitions. [2021-02-19 17:18:40,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:40,826 INFO L276 IsEmpty]: Start isEmpty. Operand 43786 states and 98422 transitions. [2021-02-19 17:18:40,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-19 17:18:40,847 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:40,847 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:41,048 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:41,048 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:41,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:41,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1570614057, now seen corresponding path program 121 times [2021-02-19 17:18:41,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:41,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467356042] [2021-02-19 17:18:41,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:41,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:41,221 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:18:41,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467356042] [2021-02-19 17:18:41,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031181853] [2021-02-19 17:18:41,222 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:41,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:41,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:18:41,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:41,470 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:41,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:41,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-02-19 17:18:41,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358129931] [2021-02-19 17:18:41,470 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 17:18:41,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:41,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 17:18:41,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:18:41,471 INFO L87 Difference]: Start difference. First operand 43786 states and 98422 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:42,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:42,131 INFO L93 Difference]: Finished difference Result 44309 states and 99482 transitions. [2021-02-19 17:18:42,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 17:18:42,131 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-02-19 17:18:42,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:42,180 INFO L225 Difference]: With dead ends: 44309 [2021-02-19 17:18:42,180 INFO L226 Difference]: Without dead ends: 44269 [2021-02-19 17:18:42,180 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:18:42,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44269 states. [2021-02-19 17:18:42,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44269 to 44009. [2021-02-19 17:18:42,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44009 states, 44008 states have (on average 2.2482957644064716) internal successors, (98943), 44008 states have internal predecessors, (98943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:42,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44009 states to 44009 states and 98943 transitions. [2021-02-19 17:18:42,829 INFO L78 Accepts]: Start accepts. Automaton has 44009 states and 98943 transitions. Word has length 42 [2021-02-19 17:18:42,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:42,829 INFO L480 AbstractCegarLoop]: Abstraction has 44009 states and 98943 transitions. [2021-02-19 17:18:42,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:42,829 INFO L276 IsEmpty]: Start isEmpty. Operand 44009 states and 98943 transitions. [2021-02-19 17:18:42,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-19 17:18:42,852 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:42,852 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:43,052 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:43,052 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:43,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:43,053 INFO L82 PathProgramCache]: Analyzing trace with hash -364657193, now seen corresponding path program 122 times [2021-02-19 17:18:43,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:43,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235366045] [2021-02-19 17:18:43,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:43,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:43,203 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:18:43,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235366045] [2021-02-19 17:18:43,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812961655] [2021-02-19 17:18:43,203 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:43,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:18:43,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:43,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:18:43,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:43,531 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:43,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:43,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-02-19 17:18:43,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830264306] [2021-02-19 17:18:43,531 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 17:18:43,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:43,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 17:18:43,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:18:43,532 INFO L87 Difference]: Start difference. First operand 44009 states and 98943 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:44,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:44,448 INFO L93 Difference]: Finished difference Result 44985 states and 100996 transitions. [2021-02-19 17:18:44,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:18:44,449 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-02-19 17:18:44,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:44,494 INFO L225 Difference]: With dead ends: 44985 [2021-02-19 17:18:44,494 INFO L226 Difference]: Without dead ends: 44934 [2021-02-19 17:18:44,495 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:18:44,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44934 states. [2021-02-19 17:18:44,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44934 to 44309. [2021-02-19 17:18:44,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44309 states, 44308 states have (on average 2.248081610544371) internal successors, (99608), 44308 states have internal predecessors, (99608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:44,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44309 states to 44309 states and 99608 transitions. [2021-02-19 17:18:44,975 INFO L78 Accepts]: Start accepts. Automaton has 44309 states and 99608 transitions. Word has length 42 [2021-02-19 17:18:44,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:44,975 INFO L480 AbstractCegarLoop]: Abstraction has 44309 states and 99608 transitions. [2021-02-19 17:18:44,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:44,976 INFO L276 IsEmpty]: Start isEmpty. Operand 44309 states and 99608 transitions. [2021-02-19 17:18:44,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-19 17:18:44,997 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:44,998 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:45,198 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:45,198 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:45,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:45,198 INFO L82 PathProgramCache]: Analyzing trace with hash 383292677, now seen corresponding path program 123 times [2021-02-19 17:18:45,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:45,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322091894] [2021-02-19 17:18:45,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:45,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:45,346 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:18:45,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322091894] [2021-02-19 17:18:45,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490254521] [2021-02-19 17:18:45,346 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:45,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-02-19 17:18:45,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:45,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:18:45,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:45,640 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:45,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:45,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-02-19 17:18:45,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949189674] [2021-02-19 17:18:45,640 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 17:18:45,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:45,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 17:18:45,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:18:45,640 INFO L87 Difference]: Start difference. First operand 44309 states and 99608 transitions. Second operand has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 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) [2021-02-19 17:18:46,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:46,980 INFO L93 Difference]: Finished difference Result 49164 states and 110220 transitions. [2021-02-19 17:18:46,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 17:18:46,981 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 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 42 [2021-02-19 17:18:46,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:47,039 INFO L225 Difference]: With dead ends: 49164 [2021-02-19 17:18:47,039 INFO L226 Difference]: Without dead ends: 49079 [2021-02-19 17:18:47,039 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 17:18:47,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49079 states. [2021-02-19 17:18:47,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49079 to 47944. [2021-02-19 17:18:47,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47944 states, 47943 states have (on average 2.2517990113259496) internal successors, (107958), 47943 states have internal predecessors, (107958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:47,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47944 states to 47944 states and 107958 transitions. [2021-02-19 17:18:47,776 INFO L78 Accepts]: Start accepts. Automaton has 47944 states and 107958 transitions. Word has length 42 [2021-02-19 17:18:47,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:47,776 INFO L480 AbstractCegarLoop]: Abstraction has 47944 states and 107958 transitions. [2021-02-19 17:18:47,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 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) [2021-02-19 17:18:47,776 INFO L276 IsEmpty]: Start isEmpty. Operand 47944 states and 107958 transitions. [2021-02-19 17:18:47,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-19 17:18:47,803 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:47,803 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:48,003 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-02-19 17:18:48,003 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:48,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:48,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1910545095, now seen corresponding path program 124 times [2021-02-19 17:18:48,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:48,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190604933] [2021-02-19 17:18:48,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:48,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:48,149 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:18:48,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190604933] [2021-02-19 17:18:48,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588200874] [2021-02-19 17:18:48,150 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:48,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:18:48,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:48,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:18:48,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:48,433 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:48,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:48,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-02-19 17:18:48,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732140633] [2021-02-19 17:18:48,433 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 17:18:48,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:48,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 17:18:48,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:18:48,433 INFO L87 Difference]: Start difference. First operand 47944 states and 107958 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:49,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:49,126 INFO L93 Difference]: Finished difference Result 48735 states and 109617 transitions. [2021-02-19 17:18:49,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:18:49,127 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-02-19 17:18:49,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:49,181 INFO L225 Difference]: With dead ends: 48735 [2021-02-19 17:18:49,182 INFO L226 Difference]: Without dead ends: 48700 [2021-02-19 17:18:49,182 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=136, Invalid=920, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 17:18:49,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48700 states. [2021-02-19 17:18:49,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48700 to 47968. [2021-02-19 17:18:49,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47968 states, 47967 states have (on average 2.2517355682031397) internal successors, (108009), 47967 states have internal predecessors, (108009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:49,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47968 states to 47968 states and 108009 transitions. [2021-02-19 17:18:49,899 INFO L78 Accepts]: Start accepts. Automaton has 47968 states and 108009 transitions. Word has length 42 [2021-02-19 17:18:49,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:49,899 INFO L480 AbstractCegarLoop]: Abstraction has 47968 states and 108009 transitions. [2021-02-19 17:18:49,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:49,899 INFO L276 IsEmpty]: Start isEmpty. Operand 47968 states and 108009 transitions. [2021-02-19 17:18:49,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-19 17:18:49,927 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:49,927 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:50,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-02-19 17:18:50,128 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:50,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:50,128 INFO L82 PathProgramCache]: Analyzing trace with hash -301007153, now seen corresponding path program 125 times [2021-02-19 17:18:50,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:50,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534461926] [2021-02-19 17:18:50,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:50,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:50,276 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:18:50,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534461926] [2021-02-19 17:18:50,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090981166] [2021-02-19 17:18:50,276 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:50,295 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 17:18:50,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:50,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:18:50,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:50,558 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:50,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:50,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-02-19 17:18:50,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750215160] [2021-02-19 17:18:50,559 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 17:18:50,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:50,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 17:18:50,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:18:50,559 INFO L87 Difference]: Start difference. First operand 47968 states and 108009 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:51,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:51,267 INFO L93 Difference]: Finished difference Result 51644 states and 116036 transitions. [2021-02-19 17:18:51,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:18:51,267 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-02-19 17:18:51,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:51,332 INFO L225 Difference]: With dead ends: 51644 [2021-02-19 17:18:51,332 INFO L226 Difference]: Without dead ends: 51544 [2021-02-19 17:18:51,332 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:18:51,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51544 states. [2021-02-19 17:18:51,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51544 to 49010. [2021-02-19 17:18:52,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49010 states, 49009 states have (on average 2.252402619926952) internal successors, (110388), 49009 states have internal predecessors, (110388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:52,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49010 states to 49010 states and 110388 transitions. [2021-02-19 17:18:52,117 INFO L78 Accepts]: Start accepts. Automaton has 49010 states and 110388 transitions. Word has length 42 [2021-02-19 17:18:52,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:52,117 INFO L480 AbstractCegarLoop]: Abstraction has 49010 states and 110388 transitions. [2021-02-19 17:18:52,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:52,117 INFO L276 IsEmpty]: Start isEmpty. Operand 49010 states and 110388 transitions. [2021-02-19 17:18:52,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-19 17:18:52,147 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:52,147 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:52,347 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-02-19 17:18:52,347 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:52,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:52,348 INFO L82 PathProgramCache]: Analyzing trace with hash -703853119, now seen corresponding path program 126 times [2021-02-19 17:18:52,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:52,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916293] [2021-02-19 17:18:52,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:52,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:52,521 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:18:52,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916293] [2021-02-19 17:18:52,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030145648] [2021-02-19 17:18:52,521 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:52,540 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-02-19 17:18:52,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:52,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:18:52,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:52,835 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:18:52,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:52,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-02-19 17:18:52,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429654240] [2021-02-19 17:18:52,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 17:18:52,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:52,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 17:18:52,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:18:52,836 INFO L87 Difference]: Start difference. First operand 49010 states and 110388 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:53,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:53,752 INFO L93 Difference]: Finished difference Result 50673 states and 113916 transitions. [2021-02-19 17:18:53,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:18:53,753 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-02-19 17:18:53,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:53,818 INFO L225 Difference]: With dead ends: 50673 [2021-02-19 17:18:53,818 INFO L226 Difference]: Without dead ends: 50620 [2021-02-19 17:18:53,818 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 17:18:53,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50620 states. [2021-02-19 17:18:54,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50620 to 50130. [2021-02-19 17:18:54,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50130 states, 50129 states have (on average 2.2520497117437013) internal successors, (112893), 50129 states have internal predecessors, (112893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:54,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50130 states to 50130 states and 112893 transitions. [2021-02-19 17:18:54,662 INFO L78 Accepts]: Start accepts. Automaton has 50130 states and 112893 transitions. Word has length 42 [2021-02-19 17:18:54,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:54,662 INFO L480 AbstractCegarLoop]: Abstraction has 50130 states and 112893 transitions. [2021-02-19 17:18:54,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:54,663 INFO L276 IsEmpty]: Start isEmpty. Operand 50130 states and 112893 transitions. [2021-02-19 17:18:54,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-19 17:18:54,686 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:54,686 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:54,887 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-02-19 17:18:54,887 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:54,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:54,887 INFO L82 PathProgramCache]: Analyzing trace with hash 339065491, now seen corresponding path program 127 times [2021-02-19 17:18:54,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:54,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295899332] [2021-02-19 17:18:54,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:54,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:55,035 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:18:55,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295899332] [2021-02-19 17:18:55,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040976318] [2021-02-19 17:18:55,035 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:55,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:55,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:18:55,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:55,320 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:55,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:55,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-02-19 17:18:55,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323079318] [2021-02-19 17:18:55,321 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 17:18:55,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:55,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 17:18:55,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:18:55,321 INFO L87 Difference]: Start difference. First operand 50130 states and 112893 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:56,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:56,014 INFO L93 Difference]: Finished difference Result 50981 states and 114695 transitions. [2021-02-19 17:18:56,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:18:56,015 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-02-19 17:18:56,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:56,079 INFO L225 Difference]: With dead ends: 50981 [2021-02-19 17:18:56,079 INFO L226 Difference]: Without dead ends: 50938 [2021-02-19 17:18:56,079 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:18:56,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50938 states. [2021-02-19 17:18:56,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50938 to 50107. [2021-02-19 17:18:56,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50107 states, 50106 states have (on average 2.252165409332216) internal successors, (112847), 50106 states have internal predecessors, (112847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:56,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50107 states to 50107 states and 112847 transitions. [2021-02-19 17:18:56,792 INFO L78 Accepts]: Start accepts. Automaton has 50107 states and 112847 transitions. Word has length 42 [2021-02-19 17:18:56,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:56,793 INFO L480 AbstractCegarLoop]: Abstraction has 50107 states and 112847 transitions. [2021-02-19 17:18:56,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:56,793 INFO L276 IsEmpty]: Start isEmpty. Operand 50107 states and 112847 transitions. [2021-02-19 17:18:56,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-19 17:18:56,820 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:56,820 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:57,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-02-19 17:18:57,020 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:57,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:57,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1602593281, now seen corresponding path program 128 times [2021-02-19 17:18:57,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:57,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678047783] [2021-02-19 17:18:57,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:57,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:57,174 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:18:57,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678047783] [2021-02-19 17:18:57,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428262355] [2021-02-19 17:18:57,174 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:57,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:18:57,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:57,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:18:57,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:57,441 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:57,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:57,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-02-19 17:18:57,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394451929] [2021-02-19 17:18:57,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 17:18:57,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:57,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 17:18:57,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:18:57,442 INFO L87 Difference]: Start difference. First operand 50107 states and 112847 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:58,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:58,207 INFO L93 Difference]: Finished difference Result 50602 states and 113853 transitions. [2021-02-19 17:18:58,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:18:58,208 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-02-19 17:18:58,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:58,266 INFO L225 Difference]: With dead ends: 50602 [2021-02-19 17:18:58,266 INFO L226 Difference]: Without dead ends: 50562 [2021-02-19 17:18:58,266 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:18:58,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50562 states. [2021-02-19 17:18:58,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50562 to 50341. [2021-02-19 17:18:58,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50341 states, 50340 states have (on average 2.252522844656337) internal successors, (113392), 50340 states have internal predecessors, (113392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:59,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50341 states to 50341 states and 113392 transitions. [2021-02-19 17:18:59,034 INFO L78 Accepts]: Start accepts. Automaton has 50341 states and 113392 transitions. Word has length 42 [2021-02-19 17:18:59,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:59,035 INFO L480 AbstractCegarLoop]: Abstraction has 50341 states and 113392 transitions. [2021-02-19 17:18:59,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:59,035 INFO L276 IsEmpty]: Start isEmpty. Operand 50341 states and 113392 transitions. [2021-02-19 17:18:59,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-19 17:18:59,063 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:59,063 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:59,263 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:59,264 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:59,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:59,264 INFO L82 PathProgramCache]: Analyzing trace with hash 739503967, now seen corresponding path program 129 times [2021-02-19 17:18:59,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:59,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482758919] [2021-02-19 17:18:59,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:59,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:59,404 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:18:59,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482758919] [2021-02-19 17:18:59,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635169842] [2021-02-19 17:18:59,404 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:59,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 17:18:59,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:59,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:18:59,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:59,715 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:18:59,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:59,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-02-19 17:18:59,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215208645] [2021-02-19 17:18:59,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 17:18:59,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:59,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 17:18:59,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:18:59,716 INFO L87 Difference]: Start difference. First operand 50341 states and 113392 transitions. Second operand has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 23 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) [2021-02-19 17:19:00,556 WARN L202 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-02-19 17:19:01,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:01,040 INFO L93 Difference]: Finished difference Result 54084 states and 121478 transitions. [2021-02-19 17:19:01,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-02-19 17:19:01,041 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 23 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 42 [2021-02-19 17:19:01,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:01,116 INFO L225 Difference]: With dead ends: 54084 [2021-02-19 17:19:01,117 INFO L226 Difference]: Without dead ends: 54013 [2021-02-19 17:19:01,117 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=168, Invalid=1472, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 17:19:01,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54013 states. [2021-02-19 17:19:01,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54013 to 53169. [2021-02-19 17:19:01,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53169 states, 53168 states have (on average 2.254043785735781) internal successors, (119843), 53168 states have internal predecessors, (119843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:02,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53169 states to 53169 states and 119843 transitions. [2021-02-19 17:19:02,008 INFO L78 Accepts]: Start accepts. Automaton has 53169 states and 119843 transitions. Word has length 42 [2021-02-19 17:19:02,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:02,008 INFO L480 AbstractCegarLoop]: Abstraction has 53169 states and 119843 transitions. [2021-02-19 17:19:02,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 23 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) [2021-02-19 17:19:02,009 INFO L276 IsEmpty]: Start isEmpty. Operand 53169 states and 119843 transitions. [2021-02-19 17:19:02,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-19 17:19:02,039 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:02,039 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:02,239 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-02-19 17:19:02,239 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:02,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:02,239 INFO L82 PathProgramCache]: Analyzing trace with hash -2081749737, now seen corresponding path program 130 times [2021-02-19 17:19:02,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:02,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449098055] [2021-02-19 17:19:02,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:02,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:02,374 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:19:02,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449098055] [2021-02-19 17:19:02,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380144788] [2021-02-19 17:19:02,375 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:02,392 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:19:02,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:02,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:19:02,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:02,652 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-02-19 17:19:02,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:02,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-02-19 17:19:02,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753763081] [2021-02-19 17:19:02,652 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 17:19:02,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:02,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 17:19:02,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:19:02,652 INFO L87 Difference]: Start difference. First operand 53169 states and 119843 transitions. Second operand has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:03,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:03,284 INFO L93 Difference]: Finished difference Result 57178 states and 128792 transitions. [2021-02-19 17:19:03,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:19:03,284 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-02-19 17:19:03,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:03,359 INFO L225 Difference]: With dead ends: 57178 [2021-02-19 17:19:03,359 INFO L226 Difference]: Without dead ends: 57113 [2021-02-19 17:19:03,359 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:19:03,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57113 states. [2021-02-19 17:19:04,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57113 to 52644. [2021-02-19 17:19:04,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52644 states, 52643 states have (on average 2.2556085329483504) internal successors, (118742), 52643 states have internal predecessors, (118742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:04,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52644 states to 52644 states and 118742 transitions. [2021-02-19 17:19:04,169 INFO L78 Accepts]: Start accepts. Automaton has 52644 states and 118742 transitions. Word has length 42 [2021-02-19 17:19:04,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:04,169 INFO L480 AbstractCegarLoop]: Abstraction has 52644 states and 118742 transitions. [2021-02-19 17:19:04,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:04,169 INFO L276 IsEmpty]: Start isEmpty. Operand 52644 states and 118742 transitions. [2021-02-19 17:19:04,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-19 17:19:04,198 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:04,198 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:04,399 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:04,399 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:04,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:04,399 INFO L82 PathProgramCache]: Analyzing trace with hash 683973407, now seen corresponding path program 131 times [2021-02-19 17:19:04,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:04,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806533101] [2021-02-19 17:19:04,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:04,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:04,535 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:19:04,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806533101] [2021-02-19 17:19:04,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743050356] [2021-02-19 17:19:04,535 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:04,554 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-02-19 17:19:04,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:04,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:19:04,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:04,843 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:19:04,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:04,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-02-19 17:19:04,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15888082] [2021-02-19 17:19:04,844 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 17:19:04,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:04,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 17:19:04,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:19:04,844 INFO L87 Difference]: Start difference. First operand 52644 states and 118742 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:05,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:05,682 INFO L93 Difference]: Finished difference Result 54729 states and 123160 transitions. [2021-02-19 17:19:05,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:19:05,683 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-02-19 17:19:05,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:05,747 INFO L225 Difference]: With dead ends: 54729 [2021-02-19 17:19:05,747 INFO L226 Difference]: Without dead ends: 54629 [2021-02-19 17:19:05,747 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=174, Invalid=1086, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 17:19:06,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54629 states. [2021-02-19 17:19:06,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54629 to 52701. [2021-02-19 17:19:06,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52701 states, 52700 states have (on average 2.2552182163187857) internal successors, (118850), 52700 states have internal predecessors, (118850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:06,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52701 states to 52701 states and 118850 transitions. [2021-02-19 17:19:06,573 INFO L78 Accepts]: Start accepts. Automaton has 52701 states and 118850 transitions. Word has length 42 [2021-02-19 17:19:06,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:06,573 INFO L480 AbstractCegarLoop]: Abstraction has 52701 states and 118850 transitions. [2021-02-19 17:19:06,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:06,573 INFO L276 IsEmpty]: Start isEmpty. Operand 52701 states and 118850 transitions. [2021-02-19 17:19:06,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-19 17:19:06,603 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:06,603 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:06,805 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:06,805 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:06,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:06,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1816756951, now seen corresponding path program 132 times [2021-02-19 17:19:06,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:06,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042607812] [2021-02-19 17:19:06,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:06,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:06,940 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:19:06,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042607812] [2021-02-19 17:19:06,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470715878] [2021-02-19 17:19:06,940 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:06,958 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 17:19:06,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:06,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:19:06,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:07,205 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:19:07,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:07,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-02-19 17:19:07,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730757027] [2021-02-19 17:19:07,206 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 17:19:07,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:07,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 17:19:07,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:19:07,206 INFO L87 Difference]: Start difference. First operand 52701 states and 118850 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:07,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:07,987 INFO L93 Difference]: Finished difference Result 56271 states and 126636 transitions. [2021-02-19 17:19:07,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:19:07,987 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-02-19 17:19:07,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:08,052 INFO L225 Difference]: With dead ends: 56271 [2021-02-19 17:19:08,052 INFO L226 Difference]: Without dead ends: 56195 [2021-02-19 17:19:08,052 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:19:08,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56195 states. [2021-02-19 17:19:08,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56195 to 54531. [2021-02-19 17:19:08,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54531 states, 54530 states have (on average 2.256684393911608) internal successors, (123057), 54530 states have internal predecessors, (123057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:08,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54531 states to 54531 states and 123057 transitions. [2021-02-19 17:19:08,969 INFO L78 Accepts]: Start accepts. Automaton has 54531 states and 123057 transitions. Word has length 42 [2021-02-19 17:19:08,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:08,969 INFO L480 AbstractCegarLoop]: Abstraction has 54531 states and 123057 transitions. [2021-02-19 17:19:08,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:08,969 INFO L276 IsEmpty]: Start isEmpty. Operand 54531 states and 123057 transitions. [2021-02-19 17:19:08,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-19 17:19:08,999 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:08,999 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:09,199 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:09,199 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:09,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:09,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1275173281, now seen corresponding path program 133 times [2021-02-19 17:19:09,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:09,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039510278] [2021-02-19 17:19:09,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:09,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:09,334 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:19:09,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039510278] [2021-02-19 17:19:09,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466193319] [2021-02-19 17:19:09,335 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:09,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:09,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:19:09,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:09,600 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:19:09,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:09,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2021-02-19 17:19:09,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864174878] [2021-02-19 17:19:09,600 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 17:19:09,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:09,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 17:19:09,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:19:09,601 INFO L87 Difference]: Start difference. First operand 54531 states and 123057 transitions. Second operand has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 20 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:10,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:10,121 INFO L93 Difference]: Finished difference Result 56394 states and 127052 transitions. [2021-02-19 17:19:10,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:19:10,122 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 20 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-02-19 17:19:10,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:10,194 INFO L225 Difference]: With dead ends: 56394 [2021-02-19 17:19:10,194 INFO L226 Difference]: Without dead ends: 56355 [2021-02-19 17:19:10,195 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:19:10,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56355 states. [2021-02-19 17:19:10,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56355 to 55760. [2021-02-19 17:19:11,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55760 states, 55759 states have (on average 2.2566222493229793) internal successors, (125827), 55759 states have internal predecessors, (125827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:11,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55760 states to 55760 states and 125827 transitions. [2021-02-19 17:19:11,105 INFO L78 Accepts]: Start accepts. Automaton has 55760 states and 125827 transitions. Word has length 42 [2021-02-19 17:19:11,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:11,105 INFO L480 AbstractCegarLoop]: Abstraction has 55760 states and 125827 transitions. [2021-02-19 17:19:11,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 20 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:11,105 INFO L276 IsEmpty]: Start isEmpty. Operand 55760 states and 125827 transitions. [2021-02-19 17:19:11,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-19 17:19:11,138 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:11,138 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:11,338 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:11,339 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:11,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:11,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1043437827, now seen corresponding path program 134 times [2021-02-19 17:19:11,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:11,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412107507] [2021-02-19 17:19:11,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:11,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:11,478 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:19:11,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412107507] [2021-02-19 17:19:11,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422405114] [2021-02-19 17:19:11,478 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:11,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:19:11,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:11,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:19:11,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:11,763 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:19:11,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:11,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-02-19 17:19:11,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332175141] [2021-02-19 17:19:11,764 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 17:19:11,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:11,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 17:19:11,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:19:11,764 INFO L87 Difference]: Start difference. First operand 55760 states and 125827 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:12,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:12,507 INFO L93 Difference]: Finished difference Result 57019 states and 128491 transitions. [2021-02-19 17:19:12,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:19:12,508 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-02-19 17:19:12,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:12,577 INFO L225 Difference]: With dead ends: 57019 [2021-02-19 17:19:12,577 INFO L226 Difference]: Without dead ends: 56955 [2021-02-19 17:19:12,577 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-02-19 17:19:12,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56955 states. [2021-02-19 17:19:13,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56955 to 55709. [2021-02-19 17:19:13,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55709 states, 55708 states have (on average 2.2564981690241974) internal successors, (125705), 55708 states have internal predecessors, (125705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:13,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55709 states to 55709 states and 125705 transitions. [2021-02-19 17:19:13,478 INFO L78 Accepts]: Start accepts. Automaton has 55709 states and 125705 transitions. Word has length 42 [2021-02-19 17:19:13,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:13,478 INFO L480 AbstractCegarLoop]: Abstraction has 55709 states and 125705 transitions. [2021-02-19 17:19:13,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:13,478 INFO L276 IsEmpty]: Start isEmpty. Operand 55709 states and 125705 transitions. [2021-02-19 17:19:13,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-19 17:19:13,510 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:13,510 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:13,710 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-02-19 17:19:13,711 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:13,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:13,711 INFO L82 PathProgramCache]: Analyzing trace with hash 2012520829, now seen corresponding path program 135 times [2021-02-19 17:19:13,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:13,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130729701] [2021-02-19 17:19:13,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:13,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:13,854 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:19:13,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130729701] [2021-02-19 17:19:13,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628780859] [2021-02-19 17:19:13,855 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:13,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-02-19 17:19:13,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:13,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:19:13,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:14,150 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:19:14,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:14,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-02-19 17:19:14,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356422852] [2021-02-19 17:19:14,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 17:19:14,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:14,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 17:19:14,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:19:14,151 INFO L87 Difference]: Start difference. First operand 55709 states and 125705 transitions. Second operand has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 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) [2021-02-19 17:19:15,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:15,246 INFO L93 Difference]: Finished difference Result 59486 states and 133971 transitions. [2021-02-19 17:19:15,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 17:19:15,256 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 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 42 [2021-02-19 17:19:15,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:15,355 INFO L225 Difference]: With dead ends: 59486 [2021-02-19 17:19:15,355 INFO L226 Difference]: Without dead ends: 59421 [2021-02-19 17:19:15,356 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 17:19:15,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59421 states. [2021-02-19 17:19:16,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59421 to 55326. [2021-02-19 17:19:16,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55326 states, 55325 states have (on average 2.257279710799819) internal successors, (124884), 55325 states have internal predecessors, (124884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:16,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55326 states to 55326 states and 124884 transitions. [2021-02-19 17:19:16,230 INFO L78 Accepts]: Start accepts. Automaton has 55326 states and 124884 transitions. Word has length 42 [2021-02-19 17:19:16,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:16,230 INFO L480 AbstractCegarLoop]: Abstraction has 55326 states and 124884 transitions. [2021-02-19 17:19:16,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 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) [2021-02-19 17:19:16,230 INFO L276 IsEmpty]: Start isEmpty. Operand 55326 states and 124884 transitions. [2021-02-19 17:19:16,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-19 17:19:16,262 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:16,262 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:16,462 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-02-19 17:19:16,463 INFO L428 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:16,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:16,463 INFO L82 PathProgramCache]: Analyzing trace with hash 163254149, now seen corresponding path program 136 times [2021-02-19 17:19:16,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:16,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821586876] [2021-02-19 17:19:16,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:16,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:16,602 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:19:16,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821586876] [2021-02-19 17:19:16,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460132450] [2021-02-19 17:19:16,603 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:16,620 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:19:16,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:16,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:19:16,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:16,886 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:19:16,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:16,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-02-19 17:19:16,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960861632] [2021-02-19 17:19:16,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 17:19:16,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:16,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 17:19:16,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:19:16,887 INFO L87 Difference]: Start difference. First operand 55326 states and 124884 transitions. Second operand has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:17,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:17,474 INFO L93 Difference]: Finished difference Result 56537 states and 127438 transitions. [2021-02-19 17:19:17,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:19:17,475 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-02-19 17:19:17,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:17,549 INFO L225 Difference]: With dead ends: 56537 [2021-02-19 17:19:17,549 INFO L226 Difference]: Without dead ends: 56480 [2021-02-19 17:19:17,549 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:19:17,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56480 states. [2021-02-19 17:19:18,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56480 to 55326. [2021-02-19 17:19:18,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55326 states, 55325 states have (on average 2.257279710799819) internal successors, (124884), 55325 states have internal predecessors, (124884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:18,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55326 states to 55326 states and 124884 transitions. [2021-02-19 17:19:18,443 INFO L78 Accepts]: Start accepts. Automaton has 55326 states and 124884 transitions. Word has length 42 [2021-02-19 17:19:18,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:18,443 INFO L480 AbstractCegarLoop]: Abstraction has 55326 states and 124884 transitions. [2021-02-19 17:19:18,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:18,443 INFO L276 IsEmpty]: Start isEmpty. Operand 55326 states and 124884 transitions. [2021-02-19 17:19:18,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-19 17:19:18,474 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:18,474 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:18,675 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-02-19 17:19:18,675 INFO L428 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:18,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:18,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1668927729, now seen corresponding path program 137 times [2021-02-19 17:19:18,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:18,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761006966] [2021-02-19 17:19:18,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:18,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:18,815 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:19:18,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761006966] [2021-02-19 17:19:18,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269922989] [2021-02-19 17:19:18,816 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:18,834 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 17:19:18,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:18,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:19:18,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:19,095 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:19:19,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:19,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-02-19 17:19:19,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017626859] [2021-02-19 17:19:19,096 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 17:19:19,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:19,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 17:19:19,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:19:19,096 INFO L87 Difference]: Start difference. First operand 55326 states and 124884 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:19,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:19,976 INFO L93 Difference]: Finished difference Result 56317 states and 126979 transitions. [2021-02-19 17:19:19,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:19:19,977 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-02-19 17:19:19,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:20,042 INFO L225 Difference]: With dead ends: 56317 [2021-02-19 17:19:20,042 INFO L226 Difference]: Without dead ends: 56270 [2021-02-19 17:19:20,042 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:19:20,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56270 states. [2021-02-19 17:19:20,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56270 to 55585. [2021-02-19 17:19:20,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55585 states, 55584 states have (on average 2.257304260218768) internal successors, (125470), 55584 states have internal predecessors, (125470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:20,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55585 states to 55585 states and 125470 transitions. [2021-02-19 17:19:20,690 INFO L78 Accepts]: Start accepts. Automaton has 55585 states and 125470 transitions. Word has length 42 [2021-02-19 17:19:20,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:20,690 INFO L480 AbstractCegarLoop]: Abstraction has 55585 states and 125470 transitions. [2021-02-19 17:19:20,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:20,690 INFO L276 IsEmpty]: Start isEmpty. Operand 55585 states and 125470 transitions. [2021-02-19 17:19:20,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-19 17:19:20,721 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:20,721 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:20,921 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-02-19 17:19:20,921 INFO L428 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:20,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:20,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1069895841, now seen corresponding path program 138 times [2021-02-19 17:19:20,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:20,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007275928] [2021-02-19 17:19:20,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:20,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:21,065 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:19:21,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007275928] [2021-02-19 17:19:21,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788198036] [2021-02-19 17:19:21,065 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:21,083 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-02-19 17:19:21,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:21,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:19:21,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:21,467 WARN L202 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-02-19 17:19:21,615 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:19:21,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:21,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-02-19 17:19:21,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838314714] [2021-02-19 17:19:21,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 17:19:21,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:21,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 17:19:21,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:19:21,616 INFO L87 Difference]: Start difference. First operand 55585 states and 125470 transitions. Second operand has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 23 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) [2021-02-19 17:19:22,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:22,825 INFO L93 Difference]: Finished difference Result 61301 states and 138297 transitions. [2021-02-19 17:19:22,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 17:19:22,826 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 23 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 42 [2021-02-19 17:19:22,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:22,908 INFO L225 Difference]: With dead ends: 61301 [2021-02-19 17:19:22,909 INFO L226 Difference]: Without dead ends: 61234 [2021-02-19 17:19:22,909 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=157, Invalid=1249, Unknown=0, NotChecked=0, Total=1406 [2021-02-19 17:19:22,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61234 states. [2021-02-19 17:19:23,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61234 to 55915. [2021-02-19 17:19:23,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55915 states, 55914 states have (on average 2.256268555281325) internal successors, (126157), 55914 states have internal predecessors, (126157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:23,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55915 states to 55915 states and 126157 transitions. [2021-02-19 17:19:23,713 INFO L78 Accepts]: Start accepts. Automaton has 55915 states and 126157 transitions. Word has length 42 [2021-02-19 17:19:23,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:23,713 INFO L480 AbstractCegarLoop]: Abstraction has 55915 states and 126157 transitions. [2021-02-19 17:19:23,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 23 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) [2021-02-19 17:19:23,713 INFO L276 IsEmpty]: Start isEmpty. Operand 55915 states and 126157 transitions. [2021-02-19 17:19:23,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-19 17:19:23,744 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:23,744 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:23,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-02-19 17:19:23,944 INFO L428 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:23,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:23,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1247212837, now seen corresponding path program 139 times [2021-02-19 17:19:23,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:23,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221732241] [2021-02-19 17:19:23,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:23,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:24,095 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:19:24,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221732241] [2021-02-19 17:19:24,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688065518] [2021-02-19 17:19:24,095 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:24,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:24,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 17:19:24,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:24,356 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:19:24,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:24,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-02-19 17:19:24,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241755104] [2021-02-19 17:19:24,356 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 17:19:24,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:24,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 17:19:24,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:19:24,357 INFO L87 Difference]: Start difference. First operand 55915 states and 126157 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:25,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:25,133 INFO L93 Difference]: Finished difference Result 56362 states and 127061 transitions. [2021-02-19 17:19:25,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:19:25,134 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-02-19 17:19:25,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:25,209 INFO L225 Difference]: With dead ends: 56362 [2021-02-19 17:19:25,209 INFO L226 Difference]: Without dead ends: 56322 [2021-02-19 17:19:25,210 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:19:25,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56322 states. [2021-02-19 17:19:25,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56322 to 56135. [2021-02-19 17:19:25,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56135 states, 56134 states have (on average 2.256546834360637) internal successors, (126669), 56134 states have internal predecessors, (126669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:26,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56135 states to 56135 states and 126669 transitions. [2021-02-19 17:19:26,059 INFO L78 Accepts]: Start accepts. Automaton has 56135 states and 126669 transitions. Word has length 42 [2021-02-19 17:19:26,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:26,059 INFO L480 AbstractCegarLoop]: Abstraction has 56135 states and 126669 transitions. [2021-02-19 17:19:26,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:26,059 INFO L276 IsEmpty]: Start isEmpty. Operand 56135 states and 126669 transitions. [2021-02-19 17:19:26,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-02-19 17:19:26,091 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:26,091 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:26,291 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:26,292 INFO L428 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:26,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:26,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1417311605, now seen corresponding path program 8 times [2021-02-19 17:19:26,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:26,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634774714] [2021-02-19 17:19:26,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:26,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:26,353 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 12 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:26,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634774714] [2021-02-19 17:19:26,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492083931] [2021-02-19 17:19:26,354 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:26,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:19:26,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:26,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 11 conjunts are in the unsatisfiable core [2021-02-19 17:19:26,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:26,456 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 22 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:26,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:26,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-02-19 17:19:26,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643157756] [2021-02-19 17:19:26,457 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:19:26,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:26,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:19:26,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:19:26,457 INFO L87 Difference]: Start difference. First operand 56135 states and 126669 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:26,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:26,790 INFO L93 Difference]: Finished difference Result 59240 states and 132696 transitions. [2021-02-19 17:19:26,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:19:26,791 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-02-19 17:19:26,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:27,105 INFO L225 Difference]: With dead ends: 59240 [2021-02-19 17:19:27,105 INFO L226 Difference]: Without dead ends: 59240 [2021-02-19 17:19:27,105 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:19:27,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59240 states. [2021-02-19 17:19:27,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59240 to 56220. [2021-02-19 17:19:27,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56220 states, 56219 states have (on average 2.256176737401946) internal successors, (126840), 56219 states have internal predecessors, (126840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:27,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56220 states to 56220 states and 126840 transitions. [2021-02-19 17:19:27,740 INFO L78 Accepts]: Start accepts. Automaton has 56220 states and 126840 transitions. Word has length 43 [2021-02-19 17:19:27,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:27,740 INFO L480 AbstractCegarLoop]: Abstraction has 56220 states and 126840 transitions. [2021-02-19 17:19:27,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:27,740 INFO L276 IsEmpty]: Start isEmpty. Operand 56220 states and 126840 transitions. [2021-02-19 17:19:27,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 17:19:27,774 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:27,774 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:27,974 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:27,974 INFO L428 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:27,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:27,975 INFO L82 PathProgramCache]: Analyzing trace with hash -975916982, now seen corresponding path program 140 times [2021-02-19 17:19:27,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:27,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316287691] [2021-02-19 17:19:27,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:27,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:28,249 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:28,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316287691] [2021-02-19 17:19:28,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765385141] [2021-02-19 17:19:28,250 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:28,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:19:28,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:28,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 17:19:28,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:28,498 WARN L202 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-02-19 17:19:28,878 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:19:28,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:28,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-02-19 17:19:28,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941644883] [2021-02-19 17:19:28,879 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 17:19:28,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:28,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 17:19:28,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=689, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:19:28,879 INFO L87 Difference]: Start difference. First operand 56220 states and 126840 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:29,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:29,970 INFO L93 Difference]: Finished difference Result 57581 states and 129835 transitions. [2021-02-19 17:19:29,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 17:19:29,970 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-02-19 17:19:29,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:30,047 INFO L225 Difference]: With dead ends: 57581 [2021-02-19 17:19:30,047 INFO L226 Difference]: Without dead ends: 57564 [2021-02-19 17:19:30,047 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=120, Invalid=1212, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 17:19:30,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57564 states. [2021-02-19 17:19:30,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57564 to 57088. [2021-02-19 17:19:30,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57088 states, 57087 states have (on average 2.2573440538126017) internal successors, (128865), 57087 states have internal predecessors, (128865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:30,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57088 states to 57088 states and 128865 transitions. [2021-02-19 17:19:30,876 INFO L78 Accepts]: Start accepts. Automaton has 57088 states and 128865 transitions. Word has length 44 [2021-02-19 17:19:30,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:30,877 INFO L480 AbstractCegarLoop]: Abstraction has 57088 states and 128865 transitions. [2021-02-19 17:19:30,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:30,877 INFO L276 IsEmpty]: Start isEmpty. Operand 57088 states and 128865 transitions. [2021-02-19 17:19:30,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 17:19:30,915 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:30,915 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:31,115 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:31,116 INFO L428 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:31,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:31,116 INFO L82 PathProgramCache]: Analyzing trace with hash -399183598, now seen corresponding path program 141 times [2021-02-19 17:19:31,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:31,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710718616] [2021-02-19 17:19:31,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:31,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:31,354 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:31,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710718616] [2021-02-19 17:19:31,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932756939] [2021-02-19 17:19:31,354 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:31,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-02-19 17:19:31,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:31,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 17:19:31,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:31,830 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:19:31,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:31,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-02-19 17:19:31,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155334748] [2021-02-19 17:19:31,831 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 17:19:31,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:31,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 17:19:31,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=858, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:19:31,831 INFO L87 Difference]: Start difference. First operand 57088 states and 128865 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:34,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:34,220 INFO L93 Difference]: Finished difference Result 64602 states and 145282 transitions. [2021-02-19 17:19:34,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-02-19 17:19:34,220 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-02-19 17:19:34,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:34,301 INFO L225 Difference]: With dead ends: 64602 [2021-02-19 17:19:34,301 INFO L226 Difference]: Without dead ends: 64568 [2021-02-19 17:19:34,301 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=157, Invalid=2005, Unknown=0, NotChecked=0, Total=2162 [2021-02-19 17:19:34,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64568 states. [2021-02-19 17:19:35,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64568 to 60075. [2021-02-19 17:19:35,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60075 states, 60074 states have (on average 2.265805506541932) internal successors, (136116), 60074 states have internal predecessors, (136116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:35,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60075 states to 60075 states and 136116 transitions. [2021-02-19 17:19:35,240 INFO L78 Accepts]: Start accepts. Automaton has 60075 states and 136116 transitions. Word has length 44 [2021-02-19 17:19:35,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:35,240 INFO L480 AbstractCegarLoop]: Abstraction has 60075 states and 136116 transitions. [2021-02-19 17:19:35,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:35,240 INFO L276 IsEmpty]: Start isEmpty. Operand 60075 states and 136116 transitions. [2021-02-19 17:19:35,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 17:19:35,272 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:35,272 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:35,473 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:35,473 INFO L428 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:35,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:35,473 INFO L82 PathProgramCache]: Analyzing trace with hash 347922506, now seen corresponding path program 142 times [2021-02-19 17:19:35,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:35,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348421122] [2021-02-19 17:19:35,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:35,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:35,714 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:35,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348421122] [2021-02-19 17:19:35,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176418782] [2021-02-19 17:19:35,714 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:35,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:19:35,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:35,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 17:19:35,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:36,116 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:19:36,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:36,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-02-19 17:19:36,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847999869] [2021-02-19 17:19:36,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 17:19:36,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:36,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 17:19:36,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:19:36,117 INFO L87 Difference]: Start difference. First operand 60075 states and 136116 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:37,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:37,794 INFO L93 Difference]: Finished difference Result 61117 states and 138361 transitions. [2021-02-19 17:19:37,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 17:19:37,795 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-02-19 17:19:37,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:37,865 INFO L225 Difference]: With dead ends: 61117 [2021-02-19 17:19:37,865 INFO L226 Difference]: Without dead ends: 61100 [2021-02-19 17:19:37,865 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=137, Invalid=1503, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 17:19:37,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61100 states. [2021-02-19 17:19:38,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61100 to 60610. [2021-02-19 17:19:38,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60610 states, 60609 states have (on average 2.26736953257767) internal successors, (137423), 60609 states have internal predecessors, (137423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:38,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60610 states to 60610 states and 137423 transitions. [2021-02-19 17:19:38,587 INFO L78 Accepts]: Start accepts. Automaton has 60610 states and 137423 transitions. Word has length 44 [2021-02-19 17:19:38,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:38,587 INFO L480 AbstractCegarLoop]: Abstraction has 60610 states and 137423 transitions. [2021-02-19 17:19:38,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:38,587 INFO L276 IsEmpty]: Start isEmpty. Operand 60610 states and 137423 transitions. [2021-02-19 17:19:38,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 17:19:38,622 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:38,622 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:38,822 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:38,822 INFO L428 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:38,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:38,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1446378514, now seen corresponding path program 143 times [2021-02-19 17:19:38,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:38,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539775735] [2021-02-19 17:19:38,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:38,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:39,275 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:39,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539775735] [2021-02-19 17:19:39,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991486589] [2021-02-19 17:19:39,276 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:39,295 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 17:19:39,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:39,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 17:19:39,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:39,885 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:19:39,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:39,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 32 [2021-02-19 17:19:39,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859326560] [2021-02-19 17:19:39,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 17:19:39,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:39,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 17:19:39,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=975, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 17:19:39,886 INFO L87 Difference]: Start difference. First operand 60610 states and 137423 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:41,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:41,537 INFO L93 Difference]: Finished difference Result 62141 states and 140673 transitions. [2021-02-19 17:19:41,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-02-19 17:19:41,538 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-02-19 17:19:41,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:41,623 INFO L225 Difference]: With dead ends: 62141 [2021-02-19 17:19:41,623 INFO L226 Difference]: Without dead ends: 62124 [2021-02-19 17:19:41,623 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=183, Invalid=2169, Unknown=0, NotChecked=0, Total=2352 [2021-02-19 17:19:41,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62124 states. [2021-02-19 17:19:42,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62124 to 61220. [2021-02-19 17:19:42,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61220 states, 61219 states have (on average 2.269083127787125) internal successors, (138911), 61219 states have internal predecessors, (138911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:42,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61220 states to 61220 states and 138911 transitions. [2021-02-19 17:19:42,471 INFO L78 Accepts]: Start accepts. Automaton has 61220 states and 138911 transitions. Word has length 44 [2021-02-19 17:19:42,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:42,471 INFO L480 AbstractCegarLoop]: Abstraction has 61220 states and 138911 transitions. [2021-02-19 17:19:42,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:42,471 INFO L276 IsEmpty]: Start isEmpty. Operand 61220 states and 138911 transitions. [2021-02-19 17:19:42,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 17:19:42,504 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:42,504 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:42,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:42,705 INFO L428 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:42,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:42,705 INFO L82 PathProgramCache]: Analyzing trace with hash -967854774, now seen corresponding path program 144 times [2021-02-19 17:19:42,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:42,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109643628] [2021-02-19 17:19:42,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:42,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:42,942 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:42,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109643628] [2021-02-19 17:19:42,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720604609] [2021-02-19 17:19:42,943 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:42,961 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-02-19 17:19:42,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:42,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 17:19:42,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:43,537 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:19:43,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:43,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 33 [2021-02-19 17:19:43,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650124668] [2021-02-19 17:19:43,537 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 17:19:43,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:43,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 17:19:43,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1040, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 17:19:43,538 INFO L87 Difference]: Start difference. First operand 61220 states and 138911 transitions. Second operand has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:45,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:45,779 INFO L93 Difference]: Finished difference Result 67577 states and 152697 transitions. [2021-02-19 17:19:45,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-02-19 17:19:45,779 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-02-19 17:19:45,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:45,866 INFO L225 Difference]: With dead ends: 67577 [2021-02-19 17:19:45,866 INFO L226 Difference]: Without dead ends: 67543 [2021-02-19 17:19:45,866 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=223, Invalid=2747, Unknown=0, NotChecked=0, Total=2970 [2021-02-19 17:19:45,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67543 states. [2021-02-19 17:19:46,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67543 to 63075. [2021-02-19 17:19:46,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63075 states, 63074 states have (on average 2.2736151187494054) internal successors, (143406), 63074 states have internal predecessors, (143406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:46,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63075 states to 63075 states and 143406 transitions. [2021-02-19 17:19:46,827 INFO L78 Accepts]: Start accepts. Automaton has 63075 states and 143406 transitions. Word has length 44 [2021-02-19 17:19:46,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:46,827 INFO L480 AbstractCegarLoop]: Abstraction has 63075 states and 143406 transitions. [2021-02-19 17:19:46,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:46,827 INFO L276 IsEmpty]: Start isEmpty. Operand 63075 states and 143406 transitions. [2021-02-19 17:19:46,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 17:19:46,863 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:46,863 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:47,063 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:47,063 INFO L428 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:47,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:47,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1008571630, now seen corresponding path program 145 times [2021-02-19 17:19:47,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:47,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588784115] [2021-02-19 17:19:47,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:47,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:47,338 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:47,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588784115] [2021-02-19 17:19:47,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714747060] [2021-02-19 17:19:47,339 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:47,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:47,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 17:19:47,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:47,770 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:19:47,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:47,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 28 [2021-02-19 17:19:47,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164199501] [2021-02-19 17:19:47,771 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-02-19 17:19:47,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:47,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-02-19 17:19:47,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=741, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:19:47,771 INFO L87 Difference]: Start difference. First operand 63075 states and 143406 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 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) [2021-02-19 17:19:49,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:49,061 INFO L93 Difference]: Finished difference Result 64664 states and 146868 transitions. [2021-02-19 17:19:49,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 17:19:49,062 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 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 44 [2021-02-19 17:19:49,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:49,147 INFO L225 Difference]: With dead ends: 64664 [2021-02-19 17:19:49,147 INFO L226 Difference]: Without dead ends: 64630 [2021-02-19 17:19:49,147 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=126, Invalid=1280, Unknown=0, NotChecked=0, Total=1406 [2021-02-19 17:19:49,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64630 states. [2021-02-19 17:19:49,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64630 to 64028. [2021-02-19 17:19:50,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64028 states, 64027 states have (on average 2.2752901119840065) internal successors, (145680), 64027 states have internal predecessors, (145680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:50,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64028 states to 64028 states and 145680 transitions. [2021-02-19 17:19:50,156 INFO L78 Accepts]: Start accepts. Automaton has 64028 states and 145680 transitions. Word has length 44 [2021-02-19 17:19:50,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:50,157 INFO L480 AbstractCegarLoop]: Abstraction has 64028 states and 145680 transitions. [2021-02-19 17:19:50,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 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) [2021-02-19 17:19:50,157 INFO L276 IsEmpty]: Start isEmpty. Operand 64028 states and 145680 transitions. [2021-02-19 17:19:50,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 17:19:50,194 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:50,194 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:50,395 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-02-19 17:19:50,395 INFO L428 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:50,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:50,395 INFO L82 PathProgramCache]: Analyzing trace with hash -606090678, now seen corresponding path program 146 times [2021-02-19 17:19:50,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:50,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932928284] [2021-02-19 17:19:50,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:50,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:50,633 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:50,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932928284] [2021-02-19 17:19:50,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532285418] [2021-02-19 17:19:50,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:50,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:19:50,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:50,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 17:19:50,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:51,159 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:19:51,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:51,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-02-19 17:19:51,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715112150] [2021-02-19 17:19:51,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 17:19:51,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:51,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 17:19:51,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=796, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:19:51,160 INFO L87 Difference]: Start difference. First operand 64028 states and 145680 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:52,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:52,387 INFO L93 Difference]: Finished difference Result 65329 states and 148442 transitions. [2021-02-19 17:19:52,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 17:19:52,388 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-02-19 17:19:52,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:52,485 INFO L225 Difference]: With dead ends: 65329 [2021-02-19 17:19:52,485 INFO L226 Difference]: Without dead ends: 65295 [2021-02-19 17:19:52,485 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=129, Invalid=1353, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 17:19:52,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65295 states. [2021-02-19 17:19:53,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65295 to 64699. [2021-02-19 17:19:53,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64699 states, 64698 states have (on average 2.276160004946057) internal successors, (147263), 64698 states have internal predecessors, (147263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:53,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64699 states to 64699 states and 147263 transitions. [2021-02-19 17:19:53,482 INFO L78 Accepts]: Start accepts. Automaton has 64699 states and 147263 transitions. Word has length 44 [2021-02-19 17:19:53,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:53,482 INFO L480 AbstractCegarLoop]: Abstraction has 64699 states and 147263 transitions. [2021-02-19 17:19:53,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:53,482 INFO L276 IsEmpty]: Start isEmpty. Operand 64699 states and 147263 transitions. [2021-02-19 17:19:53,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 17:19:53,517 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:53,517 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:53,717 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:53,717 INFO L428 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:53,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:53,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1285982702, now seen corresponding path program 147 times [2021-02-19 17:19:53,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:53,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849775717] [2021-02-19 17:19:53,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:53,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:54,167 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:54,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849775717] [2021-02-19 17:19:54,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79509893] [2021-02-19 17:19:54,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:54,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-02-19 17:19:54,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:54,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 17:19:54,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:54,663 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:19:54,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:54,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-02-19 17:19:54,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188006731] [2021-02-19 17:19:54,664 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 17:19:54,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:54,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 17:19:54,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=859, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:19:54,664 INFO L87 Difference]: Start difference. First operand 64699 states and 147263 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:56,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:56,465 INFO L93 Difference]: Finished difference Result 75604 states and 171475 transitions. [2021-02-19 17:19:56,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-02-19 17:19:56,466 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-02-19 17:19:56,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:56,557 INFO L225 Difference]: With dead ends: 75604 [2021-02-19 17:19:56,557 INFO L226 Difference]: Without dead ends: 75535 [2021-02-19 17:19:56,557 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=167, Invalid=2089, Unknown=0, NotChecked=0, Total=2256 [2021-02-19 17:19:56,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75535 states. [2021-02-19 17:19:57,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75535 to 69950. [2021-02-19 17:19:57,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69950 states, 69949 states have (on average 2.2841355844972764) internal successors, (159773), 69949 states have internal predecessors, (159773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:57,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69950 states to 69950 states and 159773 transitions. [2021-02-19 17:19:57,823 INFO L78 Accepts]: Start accepts. Automaton has 69950 states and 159773 transitions. Word has length 44 [2021-02-19 17:19:57,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:57,823 INFO L480 AbstractCegarLoop]: Abstraction has 69950 states and 159773 transitions. [2021-02-19 17:19:57,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:57,823 INFO L276 IsEmpty]: Start isEmpty. Operand 69950 states and 159773 transitions. [2021-02-19 17:19:57,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 17:19:57,859 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:57,859 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:58,059 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-02-19 17:19:58,059 INFO L428 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:58,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:58,060 INFO L82 PathProgramCache]: Analyzing trace with hash -5074056, now seen corresponding path program 148 times [2021-02-19 17:19:58,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:58,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767638666] [2021-02-19 17:19:58,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:58,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:58,332 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:58,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767638666] [2021-02-19 17:19:58,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239814720] [2021-02-19 17:19:58,332 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:58,350 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:19:58,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:58,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 17:19:58,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:58,900 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:19:58,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:58,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-02-19 17:19:58,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848108199] [2021-02-19 17:19:58,901 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 17:19:58,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:58,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 17:19:58,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:19:58,901 INFO L87 Difference]: Start difference. First operand 69950 states and 159773 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:00,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:00,155 INFO L93 Difference]: Finished difference Result 70952 states and 161947 transitions. [2021-02-19 17:20:00,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 17:20:00,156 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-02-19 17:20:00,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:00,251 INFO L225 Difference]: With dead ends: 70952 [2021-02-19 17:20:00,251 INFO L226 Difference]: Without dead ends: 70935 [2021-02-19 17:20:00,251 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=134, Invalid=1506, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 17:20:00,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70935 states. [2021-02-19 17:20:01,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70935 to 70483. [2021-02-19 17:20:01,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70483 states, 70482 states have (on average 2.285392014982549) internal successors, (161079), 70482 states have internal predecessors, (161079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:01,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70483 states to 70483 states and 161079 transitions. [2021-02-19 17:20:01,295 INFO L78 Accepts]: Start accepts. Automaton has 70483 states and 161079 transitions. Word has length 44 [2021-02-19 17:20:01,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:01,296 INFO L480 AbstractCegarLoop]: Abstraction has 70483 states and 161079 transitions. [2021-02-19 17:20:01,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:01,296 INFO L276 IsEmpty]: Start isEmpty. Operand 70483 states and 161079 transitions. [2021-02-19 17:20:01,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 17:20:01,337 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:01,337 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:01,537 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:01,538 INFO L428 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:01,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:01,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1855145764, now seen corresponding path program 149 times [2021-02-19 17:20:01,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:01,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521887508] [2021-02-19 17:20:01,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:01,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:01,820 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:20:01,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521887508] [2021-02-19 17:20:01,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313227090] [2021-02-19 17:20:01,821 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:01,840 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-02-19 17:20:01,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:20:01,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 17:20:01,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:02,432 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:20:02,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:02,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 32 [2021-02-19 17:20:02,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145486683] [2021-02-19 17:20:02,432 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 17:20:02,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:02,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 17:20:02,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=975, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 17:20:02,433 INFO L87 Difference]: Start difference. First operand 70483 states and 161079 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:04,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:04,190 INFO L93 Difference]: Finished difference Result 71720 states and 163724 transitions. [2021-02-19 17:20:04,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-02-19 17:20:04,191 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-02-19 17:20:04,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:04,285 INFO L225 Difference]: With dead ends: 71720 [2021-02-19 17:20:04,286 INFO L226 Difference]: Without dead ends: 71703 [2021-02-19 17:20:04,286 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=183, Invalid=2169, Unknown=0, NotChecked=0, Total=2352 [2021-02-19 17:20:04,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71703 states. [2021-02-19 17:20:05,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71703 to 71032. [2021-02-19 17:20:05,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71032 states, 71031 states have (on average 2.2866494910672803) internal successors, (162423), 71031 states have internal predecessors, (162423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:05,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71032 states to 71032 states and 162423 transitions. [2021-02-19 17:20:05,315 INFO L78 Accepts]: Start accepts. Automaton has 71032 states and 162423 transitions. Word has length 44 [2021-02-19 17:20:05,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:05,315 INFO L480 AbstractCegarLoop]: Abstraction has 71032 states and 162423 transitions. [2021-02-19 17:20:05,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:05,315 INFO L276 IsEmpty]: Start isEmpty. Operand 71032 states and 162423 transitions. [2021-02-19 17:20:05,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 17:20:05,357 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:05,357 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:05,557 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2021-02-19 17:20:05,557 INFO L428 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:05,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:05,558 INFO L82 PathProgramCache]: Analyzing trace with hash 577754996, now seen corresponding path program 150 times [2021-02-19 17:20:05,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:05,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523780183] [2021-02-19 17:20:05,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:05,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:05,808 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:20:05,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523780183] [2021-02-19 17:20:05,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093919518] [2021-02-19 17:20:05,808 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:05,828 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-02-19 17:20:05,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:20:05,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 17:20:05,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:06,345 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:20:06,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:06,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-02-19 17:20:06,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841800457] [2021-02-19 17:20:06,346 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 17:20:06,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:06,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 17:20:06,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=860, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:20:06,346 INFO L87 Difference]: Start difference. First operand 71032 states and 162423 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:08,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:08,709 INFO L93 Difference]: Finished difference Result 79207 states and 180098 transitions. [2021-02-19 17:20:08,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-02-19 17:20:08,710 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-02-19 17:20:08,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:08,804 INFO L225 Difference]: With dead ends: 79207 [2021-02-19 17:20:08,804 INFO L226 Difference]: Without dead ends: 79173 [2021-02-19 17:20:08,804 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=167, Invalid=2185, Unknown=0, NotChecked=0, Total=2352 [2021-02-19 17:20:08,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79173 states. [2021-02-19 17:20:09,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79173 to 73877. [2021-02-19 17:20:09,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73877 states, 73876 states have (on average 2.292016351724511) internal successors, (169325), 73876 states have internal predecessors, (169325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:09,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73877 states to 73877 states and 169325 transitions. [2021-02-19 17:20:09,876 INFO L78 Accepts]: Start accepts. Automaton has 73877 states and 169325 transitions. Word has length 44 [2021-02-19 17:20:09,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:09,876 INFO L480 AbstractCegarLoop]: Abstraction has 73877 states and 169325 transitions. [2021-02-19 17:20:09,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:09,876 INFO L276 IsEmpty]: Start isEmpty. Operand 73877 states and 169325 transitions. [2021-02-19 17:20:09,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 17:20:09,914 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:09,914 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:10,114 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:10,115 INFO L428 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:10,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:10,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1676211004, now seen corresponding path program 151 times [2021-02-19 17:20:10,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:10,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536388656] [2021-02-19 17:20:10,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:10,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:10,427 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:20:10,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536388656] [2021-02-19 17:20:10,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82062942] [2021-02-19 17:20:10,428 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:10,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:10,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 17:20:10,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:10,890 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:20:10,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:10,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-02-19 17:20:10,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380489244] [2021-02-19 17:20:10,890 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 17:20:10,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:10,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 17:20:10,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:20:10,891 INFO L87 Difference]: Start difference. First operand 73877 states and 169325 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:12,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:12,505 INFO L93 Difference]: Finished difference Result 74738 states and 171189 transitions. [2021-02-19 17:20:12,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 17:20:12,506 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-02-19 17:20:12,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:12,600 INFO L225 Difference]: With dead ends: 74738 [2021-02-19 17:20:12,600 INFO L226 Difference]: Without dead ends: 74721 [2021-02-19 17:20:12,600 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=135, Invalid=1587, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 17:20:12,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74721 states. [2021-02-19 17:20:13,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74721 to 74366. [2021-02-19 17:20:13,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74366 states, 74365 states have (on average 2.2927990318025953) internal successors, (170504), 74365 states have internal predecessors, (170504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:13,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74366 states to 74366 states and 170504 transitions. [2021-02-19 17:20:13,672 INFO L78 Accepts]: Start accepts. Automaton has 74366 states and 170504 transitions. Word has length 44 [2021-02-19 17:20:13,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:13,672 INFO L480 AbstractCegarLoop]: Abstraction has 74366 states and 170504 transitions. [2021-02-19 17:20:13,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:13,672 INFO L276 IsEmpty]: Start isEmpty. Operand 74366 states and 170504 transitions. [2021-02-19 17:20:13,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 17:20:13,709 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:13,709 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:13,910 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:13,910 INFO L428 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:13,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:13,910 INFO L82 PathProgramCache]: Analyzing trace with hash -738022284, now seen corresponding path program 152 times [2021-02-19 17:20:13,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:13,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966527885] [2021-02-19 17:20:13,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:13,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:14,152 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:20:14,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966527885] [2021-02-19 17:20:14,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191504641] [2021-02-19 17:20:14,153 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:14,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:20:14,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:20:14,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 17:20:14,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:14,571 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:20:14,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:14,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-02-19 17:20:14,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709608243] [2021-02-19 17:20:14,571 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 17:20:14,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:14,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 17:20:14,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:20:14,572 INFO L87 Difference]: Start difference. First operand 74366 states and 170504 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:16,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:16,478 INFO L93 Difference]: Finished difference Result 78636 states and 179826 transitions. [2021-02-19 17:20:16,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-02-19 17:20:16,479 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-02-19 17:20:16,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:16,583 INFO L225 Difference]: With dead ends: 78636 [2021-02-19 17:20:16,583 INFO L226 Difference]: Without dead ends: 78602 [2021-02-19 17:20:16,584 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=167, Invalid=1995, Unknown=0, NotChecked=0, Total=2162 [2021-02-19 17:20:16,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78602 states. [2021-02-19 17:20:17,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78602 to 75625. [2021-02-19 17:20:17,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75625 states, 75624 states have (on average 2.2950782820268696) internal successors, (173563), 75624 states have internal predecessors, (173563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:17,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75625 states to 75625 states and 173563 transitions. [2021-02-19 17:20:17,771 INFO L78 Accepts]: Start accepts. Automaton has 75625 states and 173563 transitions. Word has length 44 [2021-02-19 17:20:17,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:17,772 INFO L480 AbstractCegarLoop]: Abstraction has 75625 states and 173563 transitions. [2021-02-19 17:20:17,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:17,772 INFO L276 IsEmpty]: Start isEmpty. Operand 75625 states and 173563 transitions. [2021-02-19 17:20:17,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 17:20:17,814 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:17,814 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:18,014 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:18,014 INFO L428 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:18,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:18,015 INFO L82 PathProgramCache]: Analyzing trace with hash -778739140, now seen corresponding path program 153 times [2021-02-19 17:20:18,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:18,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165567691] [2021-02-19 17:20:18,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:18,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:18,253 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:20:18,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165567691] [2021-02-19 17:20:18,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082664670] [2021-02-19 17:20:18,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:18,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-02-19 17:20:18,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:20:18,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 17:20:18,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:18,760 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:20:18,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:18,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-02-19 17:20:18,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361678410] [2021-02-19 17:20:18,761 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 17:20:18,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:18,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 17:20:18,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=859, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:20:18,761 INFO L87 Difference]: Start difference. First operand 75625 states and 173563 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:21,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:21,395 INFO L93 Difference]: Finished difference Result 84081 states and 191944 transitions. [2021-02-19 17:20:21,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-02-19 17:20:21,396 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-02-19 17:20:21,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:21,499 INFO L225 Difference]: With dead ends: 84081 [2021-02-19 17:20:21,499 INFO L226 Difference]: Without dead ends: 84034 [2021-02-19 17:20:21,499 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=184, Invalid=2266, Unknown=0, NotChecked=0, Total=2450 [2021-02-19 17:20:21,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84034 states. [2021-02-19 17:20:22,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84034 to 78487. [2021-02-19 17:20:22,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78487 states, 78486 states have (on average 2.2985245776316794) internal successors, (180402), 78486 states have internal predecessors, (180402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:22,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78487 states to 78487 states and 180402 transitions. [2021-02-19 17:20:22,636 INFO L78 Accepts]: Start accepts. Automaton has 78487 states and 180402 transitions. Word has length 44 [2021-02-19 17:20:22,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:22,636 INFO L480 AbstractCegarLoop]: Abstraction has 78487 states and 180402 transitions. [2021-02-19 17:20:22,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:22,636 INFO L276 IsEmpty]: Start isEmpty. Operand 78487 states and 180402 transitions. [2021-02-19 17:20:22,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 17:20:22,675 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:22,676 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:22,876 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:22,876 INFO L428 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:22,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:22,877 INFO L82 PathProgramCache]: Analyzing trace with hash -376258188, now seen corresponding path program 154 times [2021-02-19 17:20:22,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:22,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202566524] [2021-02-19 17:20:22,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:22,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:23,209 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:20:23,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202566524] [2021-02-19 17:20:23,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93882513] [2021-02-19 17:20:23,210 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:23,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:20:23,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:20:23,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 17:20:23,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:23,722 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:20:23,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:23,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-02-19 17:20:23,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128089337] [2021-02-19 17:20:23,723 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 17:20:23,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:23,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 17:20:23,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=796, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:20:23,723 INFO L87 Difference]: Start difference. First operand 78487 states and 180402 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:25,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:25,278 INFO L93 Difference]: Finished difference Result 79146 states and 181810 transitions. [2021-02-19 17:20:25,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 17:20:25,279 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-02-19 17:20:25,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:25,389 INFO L225 Difference]: With dead ends: 79146 [2021-02-19 17:20:25,389 INFO L226 Difference]: Without dead ends: 79112 [2021-02-19 17:20:25,390 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=137, Invalid=1423, Unknown=0, NotChecked=0, Total=1560 [2021-02-19 17:20:25,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79112 states. [2021-02-19 17:20:26,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79112 to 79027. [2021-02-19 17:20:26,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79027 states, 79026 states have (on average 2.2979146103813934) internal successors, (181595), 79026 states have internal predecessors, (181595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:26,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79027 states to 79027 states and 181595 transitions. [2021-02-19 17:20:26,503 INFO L78 Accepts]: Start accepts. Automaton has 79027 states and 181595 transitions. Word has length 44 [2021-02-19 17:20:26,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:26,504 INFO L480 AbstractCegarLoop]: Abstraction has 79027 states and 181595 transitions. [2021-02-19 17:20:26,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:26,504 INFO L276 IsEmpty]: Start isEmpty. Operand 79027 states and 181595 transitions. [2021-02-19 17:20:26,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 17:20:26,541 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:26,541 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:26,741 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2021-02-19 17:20:26,742 INFO L428 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:26,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:26,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1971359906, now seen corresponding path program 155 times [2021-02-19 17:20:26,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:26,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108062393] [2021-02-19 17:20:26,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:26,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:26,985 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:20:26,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108062393] [2021-02-19 17:20:26,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626543974] [2021-02-19 17:20:26,986 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:27,004 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-02-19 17:20:27,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:20:27,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 17:20:27,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:27,491 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:20:27,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:27,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-02-19 17:20:27,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121114564] [2021-02-19 17:20:27,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 17:20:27,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:27,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 17:20:27,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=853, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:20:27,492 INFO L87 Difference]: Start difference. First operand 79027 states and 181595 transitions. Second operand has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 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) [2021-02-19 17:20:29,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:29,156 INFO L93 Difference]: Finished difference Result 87645 states and 201012 transitions. [2021-02-19 17:20:29,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 17:20:29,157 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 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 44 [2021-02-19 17:20:29,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:29,266 INFO L225 Difference]: With dead ends: 87645 [2021-02-19 17:20:29,267 INFO L226 Difference]: Without dead ends: 87602 [2021-02-19 17:20:29,267 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=140, Invalid=1500, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 17:20:29,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87602 states. [2021-02-19 17:20:30,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87602 to 84874. [2021-02-19 17:20:30,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84874 states, 84873 states have (on average 2.3016742662566423) internal successors, (195350), 84873 states have internal predecessors, (195350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:30,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84874 states to 84874 states and 195350 transitions. [2021-02-19 17:20:30,513 INFO L78 Accepts]: Start accepts. Automaton has 84874 states and 195350 transitions. Word has length 44 [2021-02-19 17:20:30,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:30,513 INFO L480 AbstractCegarLoop]: Abstraction has 84874 states and 195350 transitions. [2021-02-19 17:20:30,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 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) [2021-02-19 17:20:30,513 INFO L276 IsEmpty]: Start isEmpty. Operand 84874 states and 195350 transitions. [2021-02-19 17:20:30,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 17:20:30,553 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:30,553 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:30,753 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-02-19 17:20:30,753 INFO L428 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:30,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:30,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1291697870, now seen corresponding path program 156 times [2021-02-19 17:20:30,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:30,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803494011] [2021-02-19 17:20:30,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:30,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:31,005 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:20:31,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803494011] [2021-02-19 17:20:31,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34538879] [2021-02-19 17:20:31,005 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:31,024 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-02-19 17:20:31,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:20:31,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 17:20:31,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:31,443 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:20:31,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:31,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-02-19 17:20:31,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18289388] [2021-02-19 17:20:31,443 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 17:20:31,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:31,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 17:20:31,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:20:31,444 INFO L87 Difference]: Start difference. First operand 84874 states and 195350 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:33,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:33,382 INFO L93 Difference]: Finished difference Result 87816 states and 201709 transitions. [2021-02-19 17:20:33,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-02-19 17:20:33,383 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-02-19 17:20:33,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:33,486 INFO L225 Difference]: With dead ends: 87816 [2021-02-19 17:20:33,487 INFO L226 Difference]: Without dead ends: 87799 [2021-02-19 17:20:33,487 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=151, Invalid=1829, Unknown=0, NotChecked=0, Total=1980 [2021-02-19 17:20:33,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87799 states. [2021-02-19 17:20:34,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87799 to 85630. [2021-02-19 17:20:34,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85630 states, 85629 states have (on average 2.3027479008279905) internal successors, (197182), 85629 states have internal predecessors, (197182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:34,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85630 states to 85630 states and 197182 transitions. [2021-02-19 17:20:34,731 INFO L78 Accepts]: Start accepts. Automaton has 85630 states and 197182 transitions. Word has length 44 [2021-02-19 17:20:34,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:34,731 INFO L480 AbstractCegarLoop]: Abstraction has 85630 states and 197182 transitions. [2021-02-19 17:20:34,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:34,731 INFO L276 IsEmpty]: Start isEmpty. Operand 85630 states and 197182 transitions. [2021-02-19 17:20:34,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 17:20:34,769 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:34,769 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:34,970 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:34,970 INFO L428 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:34,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:34,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1649701624, now seen corresponding path program 157 times [2021-02-19 17:20:34,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:34,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471500931] [2021-02-19 17:20:34,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:34,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:35,214 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:20:35,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471500931] [2021-02-19 17:20:35,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300373278] [2021-02-19 17:20:35,215 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:35,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:35,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 17:20:35,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:35,647 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:20:35,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:35,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-02-19 17:20:35,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511400759] [2021-02-19 17:20:35,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 17:20:35,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:35,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 17:20:35,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:20:35,648 INFO L87 Difference]: Start difference. First operand 85630 states and 197182 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:36,573 WARN L202 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2021-02-19 17:20:37,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:37,258 INFO L93 Difference]: Finished difference Result 86430 states and 198919 transitions. [2021-02-19 17:20:37,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 17:20:37,259 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-02-19 17:20:37,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:37,363 INFO L225 Difference]: With dead ends: 86430 [2021-02-19 17:20:37,364 INFO L226 Difference]: Without dead ends: 86413 [2021-02-19 17:20:37,364 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=136, Invalid=1586, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 17:20:37,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86413 states. [2021-02-19 17:20:38,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86413 to 86134. [2021-02-19 17:20:38,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86134 states, 86133 states have (on average 2.303333217233813) internal successors, (198393), 86133 states have internal predecessors, (198393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:38,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86134 states to 86134 states and 198393 transitions. [2021-02-19 17:20:38,571 INFO L78 Accepts]: Start accepts. Automaton has 86134 states and 198393 transitions. Word has length 44 [2021-02-19 17:20:38,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:38,571 INFO L480 AbstractCegarLoop]: Abstraction has 86134 states and 198393 transitions. [2021-02-19 17:20:38,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:38,571 INFO L276 IsEmpty]: Start isEmpty. Operand 86134 states and 198393 transitions. [2021-02-19 17:20:38,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 17:20:38,612 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:38,613 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:38,813 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-02-19 17:20:38,813 INFO L428 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:38,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:38,813 INFO L82 PathProgramCache]: Analyzing trace with hash 224758434, now seen corresponding path program 158 times [2021-02-19 17:20:38,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:38,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072145424] [2021-02-19 17:20:38,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:38,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:39,077 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:20:39,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072145424] [2021-02-19 17:20:39,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265584561] [2021-02-19 17:20:39,077 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:39,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:20:39,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:20:39,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 17:20:39,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:39,507 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:20:39,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:39,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-02-19 17:20:39,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985096877] [2021-02-19 17:20:39,508 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 17:20:39,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:39,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 17:20:39,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:20:39,508 INFO L87 Difference]: Start difference. First operand 86134 states and 198393 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:41,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:41,124 INFO L93 Difference]: Finished difference Result 86926 states and 200105 transitions. [2021-02-19 17:20:41,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 17:20:41,125 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-02-19 17:20:41,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:41,231 INFO L225 Difference]: With dead ends: 86926 [2021-02-19 17:20:41,231 INFO L226 Difference]: Without dead ends: 86909 [2021-02-19 17:20:41,232 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=131, Invalid=1509, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 17:20:41,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86909 states. [2021-02-19 17:20:42,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86909 to 86615. [2021-02-19 17:20:42,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86615 states, 86614 states have (on average 2.3039000623455794) internal successors, (199550), 86614 states have internal predecessors, (199550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:42,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86615 states to 86615 states and 199550 transitions. [2021-02-19 17:20:42,453 INFO L78 Accepts]: Start accepts. Automaton has 86615 states and 199550 transitions. Word has length 44 [2021-02-19 17:20:42,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:42,453 INFO L480 AbstractCegarLoop]: Abstraction has 86615 states and 199550 transitions. [2021-02-19 17:20:42,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:42,453 INFO L276 IsEmpty]: Start isEmpty. Operand 86615 states and 199550 transitions. [2021-02-19 17:20:42,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 17:20:42,492 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:42,492 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:42,693 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-02-19 17:20:42,693 INFO L428 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:42,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:42,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1455782574, now seen corresponding path program 159 times [2021-02-19 17:20:42,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:42,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993589565] [2021-02-19 17:20:42,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:42,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:42,950 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:20:42,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993589565] [2021-02-19 17:20:42,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997891823] [2021-02-19 17:20:42,950 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:42,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-02-19 17:20:42,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:20:42,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 17:20:42,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:43,599 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:20:43,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:43,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 33 [2021-02-19 17:20:43,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087399139] [2021-02-19 17:20:43,600 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 17:20:43,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:43,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 17:20:43,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1042, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 17:20:43,600 INFO L87 Difference]: Start difference. First operand 86615 states and 199550 transitions. Second operand has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:46,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:46,122 INFO L93 Difference]: Finished difference Result 91083 states and 209196 transitions. [2021-02-19 17:20:46,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-02-19 17:20:46,123 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-02-19 17:20:46,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:46,243 INFO L225 Difference]: With dead ends: 91083 [2021-02-19 17:20:46,243 INFO L226 Difference]: Without dead ends: 91049 [2021-02-19 17:20:46,243 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=198, Invalid=2772, Unknown=0, NotChecked=0, Total=2970 [2021-02-19 17:20:46,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91049 states. [2021-02-19 17:20:47,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91049 to 87931. [2021-02-19 17:20:47,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87931 states, 87930 states have (on average 2.305606732628227) internal successors, (202732), 87930 states have internal predecessors, (202732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:47,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87931 states to 87931 states and 202732 transitions. [2021-02-19 17:20:47,513 INFO L78 Accepts]: Start accepts. Automaton has 87931 states and 202732 transitions. Word has length 44 [2021-02-19 17:20:47,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:47,513 INFO L480 AbstractCegarLoop]: Abstraction has 87931 states and 202732 transitions. [2021-02-19 17:20:47,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:47,513 INFO L276 IsEmpty]: Start isEmpty. Operand 87931 states and 202732 transitions. [2021-02-19 17:20:47,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 17:20:47,553 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:47,554 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:47,754 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2021-02-19 17:20:47,754 INFO L428 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:47,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:47,754 INFO L82 PathProgramCache]: Analyzing trace with hash -357326566, now seen corresponding path program 160 times [2021-02-19 17:20:47,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:47,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746250393] [2021-02-19 17:20:47,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:47,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:48,269 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:20:48,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746250393] [2021-02-19 17:20:48,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594978766] [2021-02-19 17:20:48,269 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:20:48,299 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:20:48,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:20:48,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 17:20:48,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:48,736 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:20:48,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:48,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-02-19 17:20:48,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336460912] [2021-02-19 17:20:48,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 17:20:48,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:48,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 17:20:48,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=692, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:20:48,737 INFO L87 Difference]: Start difference. First operand 87931 states and 202732 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:50,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:50,063 INFO L93 Difference]: Finished difference Result 88810 states and 204621 transitions. [2021-02-19 17:20:50,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 17:20:50,064 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-02-19 17:20:50,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:50,175 INFO L225 Difference]: With dead ends: 88810 [2021-02-19 17:20:50,176 INFO L226 Difference]: Without dead ends: 88793 [2021-02-19 17:20:50,176 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=115, Invalid=1291, Unknown=0, NotChecked=0, Total=1406 [2021-02-19 17:20:50,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88793 states. [2021-02-19 17:20:51,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88793 to 88408. [2021-02-19 17:20:51,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88408 states, 88407 states have (on average 2.3060843598357597) internal successors, (203874), 88407 states have internal predecessors, (203874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:51,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88408 states to 88408 states and 203874 transitions. [2021-02-19 17:20:51,427 INFO L78 Accepts]: Start accepts. Automaton has 88408 states and 203874 transitions. Word has length 44 [2021-02-19 17:20:51,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:51,427 INFO L480 AbstractCegarLoop]: Abstraction has 88408 states and 203874 transitions. [2021-02-19 17:20:51,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:51,427 INFO L276 IsEmpty]: Start isEmpty. Operand 88408 states and 203874 transitions. [2021-02-19 17:20:51,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 17:20:51,466 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:51,466 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:51,666 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:51,666 INFO L428 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:51,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:51,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1523407442, now seen corresponding path program 161 times [2021-02-19 17:20:51,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:51,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005047860] [2021-02-19 17:20:51,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:51,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:52,120 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:20:52,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005047860] [2021-02-19 17:20:52,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619404044] [2021-02-19 17:20:52,121 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:52,177 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 17:20:52,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:20:52,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 17:20:52,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:52,803 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:20:52,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:52,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 32 [2021-02-19 17:20:52,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302182669] [2021-02-19 17:20:52,803 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 17:20:52,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:52,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 17:20:52,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=977, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 17:20:52,804 INFO L87 Difference]: Start difference. First operand 88408 states and 203874 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:55,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:55,392 INFO L93 Difference]: Finished difference Result 94594 states and 217166 transitions. [2021-02-19 17:20:55,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-02-19 17:20:55,394 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-02-19 17:20:55,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:55,717 INFO L225 Difference]: With dead ends: 94594 [2021-02-19 17:20:55,718 INFO L226 Difference]: Without dead ends: 94560 [2021-02-19 17:20:55,718 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=244, Invalid=3178, Unknown=0, NotChecked=0, Total=3422 [2021-02-19 17:20:55,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94560 states. [2021-02-19 17:20:56,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94560 to 89603. [2021-02-19 17:20:56,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89603 states, 89602 states have (on average 2.307281087475726) internal successors, (206737), 89602 states have internal predecessors, (206737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:56,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89603 states to 89603 states and 206737 transitions. [2021-02-19 17:20:56,916 INFO L78 Accepts]: Start accepts. Automaton has 89603 states and 206737 transitions. Word has length 44 [2021-02-19 17:20:56,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:56,916 INFO L480 AbstractCegarLoop]: Abstraction has 89603 states and 206737 transitions. [2021-02-19 17:20:56,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:56,916 INFO L276 IsEmpty]: Start isEmpty. Operand 89603 states and 206737 transitions. [2021-02-19 17:20:56,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 17:20:56,955 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:56,955 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:57,155 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2021-02-19 17:20:57,155 INFO L428 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:57,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:57,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1482690586, now seen corresponding path program 162 times [2021-02-19 17:20:57,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:57,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286132312] [2021-02-19 17:20:57,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:57,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:57,409 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:20:57,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286132312] [2021-02-19 17:20:57,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750707398] [2021-02-19 17:20:57,410 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:57,428 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-02-19 17:20:57,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:20:57,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 17:20:57,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:58,070 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:20:58,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:58,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 33 [2021-02-19 17:20:58,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697947167] [2021-02-19 17:20:58,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 17:20:58,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:58,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 17:20:58,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1042, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 17:20:58,071 INFO L87 Difference]: Start difference. First operand 89603 states and 206737 transitions. Second operand has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:00,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:21:00,853 INFO L93 Difference]: Finished difference Result 95030 states and 218324 transitions. [2021-02-19 17:21:00,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-02-19 17:21:00,854 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-02-19 17:21:00,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:21:00,974 INFO L225 Difference]: With dead ends: 95030 [2021-02-19 17:21:00,974 INFO L226 Difference]: Without dead ends: 94996 [2021-02-19 17:21:00,974 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=275, Invalid=3507, Unknown=0, NotChecked=0, Total=3782 [2021-02-19 17:21:01,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94996 states. [2021-02-19 17:21:02,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94996 to 90812. [2021-02-19 17:21:02,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90812 states, 90811 states have (on average 2.308002334518946) internal successors, (209592), 90811 states have internal predecessors, (209592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:02,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90812 states to 90812 states and 209592 transitions. [2021-02-19 17:21:02,304 INFO L78 Accepts]: Start accepts. Automaton has 90812 states and 209592 transitions. Word has length 44 [2021-02-19 17:21:02,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:21:02,304 INFO L480 AbstractCegarLoop]: Abstraction has 90812 states and 209592 transitions. [2021-02-19 17:21:02,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:02,304 INFO L276 IsEmpty]: Start isEmpty. Operand 90812 states and 209592 transitions. [2021-02-19 17:21:02,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 17:21:02,344 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:21:02,344 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:21:02,544 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:02,544 INFO L428 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:21:02,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:21:02,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1885171538, now seen corresponding path program 163 times [2021-02-19 17:21:02,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:21:02,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562560806] [2021-02-19 17:21:02,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:21:02,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:21:02,881 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:21:02,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562560806] [2021-02-19 17:21:02,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275550044] [2021-02-19 17:21:02,881 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:02,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:21:02,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 17:21:02,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:21:03,514 WARN L202 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-02-19 17:21:03,710 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:21:03,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:21:03,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-02-19 17:21:03,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218361048] [2021-02-19 17:21:03,711 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 17:21:03,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:21:03,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 17:21:03,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:21:03,711 INFO L87 Difference]: Start difference. First operand 90812 states and 209592 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:05,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:21:05,270 INFO L93 Difference]: Finished difference Result 91387 states and 210800 transitions. [2021-02-19 17:21:05,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-02-19 17:21:05,271 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-02-19 17:21:05,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:21:05,383 INFO L225 Difference]: With dead ends: 91387 [2021-02-19 17:21:05,383 INFO L226 Difference]: Without dead ends: 91353 [2021-02-19 17:21:05,383 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=149, Invalid=1657, Unknown=0, NotChecked=0, Total=1806 [2021-02-19 17:21:05,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91353 states. [2021-02-19 17:21:06,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91353 to 91255. [2021-02-19 17:21:06,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91255 states, 91254 states have (on average 2.3073289937975323) internal successors, (210553), 91254 states have internal predecessors, (210553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:06,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91255 states to 91255 states and 210553 transitions. [2021-02-19 17:21:06,659 INFO L78 Accepts]: Start accepts. Automaton has 91255 states and 210553 transitions. Word has length 44 [2021-02-19 17:21:06,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:21:06,659 INFO L480 AbstractCegarLoop]: Abstraction has 91255 states and 210553 transitions. [2021-02-19 17:21:06,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:06,660 INFO L276 IsEmpty]: Start isEmpty. Operand 91255 states and 210553 transitions. [2021-02-19 17:21:06,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 17:21:06,701 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:21:06,701 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:21:06,901 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:06,901 INFO L428 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:21:06,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:21:06,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1205279514, now seen corresponding path program 164 times [2021-02-19 17:21:06,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:21:06,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496964083] [2021-02-19 17:21:06,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:21:06,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:21:07,219 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:21:07,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496964083] [2021-02-19 17:21:07,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473815839] [2021-02-19 17:21:07,219 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:07,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:21:07,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:21:07,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 17:21:07,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:21:07,982 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:21:07,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:21:07,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-02-19 17:21:07,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283592576] [2021-02-19 17:21:07,983 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 17:21:07,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:21:07,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 17:21:07,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=855, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:21:07,983 INFO L87 Difference]: Start difference. First operand 91255 states and 210553 transitions. Second operand has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 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) [2021-02-19 17:21:09,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:21:09,559 INFO L93 Difference]: Finished difference Result 96202 states and 221311 transitions. [2021-02-19 17:21:09,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-02-19 17:21:09,561 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 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 44 [2021-02-19 17:21:09,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:21:09,677 INFO L225 Difference]: With dead ends: 96202 [2021-02-19 17:21:09,677 INFO L226 Difference]: Without dead ends: 96159 [2021-02-19 17:21:09,678 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=152, Invalid=1740, Unknown=0, NotChecked=0, Total=1892 [2021-02-19 17:21:09,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96159 states. [2021-02-19 17:21:10,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96159 to 93581. [2021-02-19 17:21:10,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93581 states, 93580 states have (on average 2.3081320795041678) internal successors, (215995), 93580 states have internal predecessors, (215995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:11,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93581 states to 93581 states and 215995 transitions. [2021-02-19 17:21:11,315 INFO L78 Accepts]: Start accepts. Automaton has 93581 states and 215995 transitions. Word has length 44 [2021-02-19 17:21:11,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:21:11,315 INFO L480 AbstractCegarLoop]: Abstraction has 93581 states and 215995 transitions. [2021-02-19 17:21:11,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 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) [2021-02-19 17:21:11,315 INFO L276 IsEmpty]: Start isEmpty. Operand 93581 states and 215995 transitions. [2021-02-19 17:21:11,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 17:21:11,350 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:21:11,350 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:21:11,550 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:11,551 INFO L428 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:21:11,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:21:11,551 INFO L82 PathProgramCache]: Analyzing trace with hash -741839700, now seen corresponding path program 165 times [2021-02-19 17:21:11,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:21:11,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024121748] [2021-02-19 17:21:11,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:21:11,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:21:11,813 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:21:11,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024121748] [2021-02-19 17:21:11,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928589852] [2021-02-19 17:21:11,814 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:11,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 17:21:11,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:21:11,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 17:21:11,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:21:12,266 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:21:12,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:21:12,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-02-19 17:21:12,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894998311] [2021-02-19 17:21:12,267 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 17:21:12,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:21:12,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 17:21:12,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=693, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:21:12,267 INFO L87 Difference]: Start difference. First operand 93581 states and 215995 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:13,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:21:13,726 INFO L93 Difference]: Finished difference Result 94378 states and 217720 transitions. [2021-02-19 17:21:13,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 17:21:13,727 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-02-19 17:21:13,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:21:13,839 INFO L225 Difference]: With dead ends: 94378 [2021-02-19 17:21:13,840 INFO L226 Difference]: Without dead ends: 94361 [2021-02-19 17:21:13,840 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=120, Invalid=1362, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 17:21:13,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94361 states. [2021-02-19 17:21:15,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94361 to 94068. [2021-02-19 17:21:15,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94068 states, 94067 states have (on average 2.308577928497773) internal successors, (217161), 94067 states have internal predecessors, (217161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:15,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94068 states to 94068 states and 217161 transitions. [2021-02-19 17:21:15,487 INFO L78 Accepts]: Start accepts. Automaton has 94068 states and 217161 transitions. Word has length 44 [2021-02-19 17:21:15,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:21:15,487 INFO L480 AbstractCegarLoop]: Abstraction has 94068 states and 217161 transitions. [2021-02-19 17:21:15,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:15,487 INFO L276 IsEmpty]: Start isEmpty. Operand 94068 states and 217161 transitions. [2021-02-19 17:21:15,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 17:21:15,527 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:21:15,527 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:21:15,727 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:15,727 INFO L428 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:21:15,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:21:15,728 INFO L82 PathProgramCache]: Analyzing trace with hash -383835946, now seen corresponding path program 166 times [2021-02-19 17:21:15,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:21:15,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499465618] [2021-02-19 17:21:15,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:21:15,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:21:15,992 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:21:15,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499465618] [2021-02-19 17:21:15,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359124107] [2021-02-19 17:21:15,992 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:16,010 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:21:16,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:21:16,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 17:21:16,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:21:16,534 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:21:16,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:21:16,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-02-19 17:21:16,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049573268] [2021-02-19 17:21:16,535 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 17:21:16,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:21:16,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 17:21:16,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=692, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:21:16,535 INFO L87 Difference]: Start difference. First operand 94068 states and 217161 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:17,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:21:17,851 INFO L93 Difference]: Finished difference Result 94858 states and 218871 transitions. [2021-02-19 17:21:17,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 17:21:17,852 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-02-19 17:21:17,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:21:17,967 INFO L225 Difference]: With dead ends: 94858 [2021-02-19 17:21:17,967 INFO L226 Difference]: Without dead ends: 94841 [2021-02-19 17:21:17,967 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=115, Invalid=1291, Unknown=0, NotChecked=0, Total=1406 [2021-02-19 17:21:18,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94841 states. [2021-02-19 17:21:19,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94841 to 94550. [2021-02-19 17:21:19,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94550 states, 94549 states have (on average 2.3090143734994553) internal successors, (218315), 94549 states have internal predecessors, (218315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:19,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94550 states to 94550 states and 218315 transitions. [2021-02-19 17:21:19,583 INFO L78 Accepts]: Start accepts. Automaton has 94550 states and 218315 transitions. Word has length 44 [2021-02-19 17:21:19,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:21:19,583 INFO L480 AbstractCegarLoop]: Abstraction has 94550 states and 218315 transitions. [2021-02-19 17:21:19,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:19,583 INFO L276 IsEmpty]: Start isEmpty. Operand 94550 states and 218315 transitions. [2021-02-19 17:21:19,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 17:21:19,626 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:21:19,626 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:21:19,826 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-02-19 17:21:19,826 INFO L428 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:21:19,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:21:19,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1808779136, now seen corresponding path program 167 times [2021-02-19 17:21:19,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:21:19,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037692618] [2021-02-19 17:21:19,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:21:19,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:21:20,095 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:21:20,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037692618] [2021-02-19 17:21:20,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886079854] [2021-02-19 17:21:20,095 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:20,114 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 17:21:20,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:21:20,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 17:21:20,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:21:20,749 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:21:20,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:21:20,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 32 [2021-02-19 17:21:20,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698278466] [2021-02-19 17:21:20,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 17:21:20,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:21:20,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 17:21:20,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=977, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 17:21:20,750 INFO L87 Difference]: Start difference. First operand 94550 states and 218315 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:22,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:21:22,993 INFO L93 Difference]: Finished difference Result 95875 states and 221116 transitions. [2021-02-19 17:21:22,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-02-19 17:21:22,994 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-02-19 17:21:22,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:21:23,111 INFO L225 Difference]: With dead ends: 95875 [2021-02-19 17:21:23,111 INFO L226 Difference]: Without dead ends: 95858 [2021-02-19 17:21:23,111 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=177, Invalid=2273, Unknown=0, NotChecked=0, Total=2450 [2021-02-19 17:21:23,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95858 states. [2021-02-19 17:21:24,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95858 to 95022. [2021-02-19 17:21:24,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95022 states, 95021 states have (on average 2.3094368613253913) internal successors, (219445), 95021 states have internal predecessors, (219445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:24,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95022 states to 95022 states and 219445 transitions. [2021-02-19 17:21:24,455 INFO L78 Accepts]: Start accepts. Automaton has 95022 states and 219445 transitions. Word has length 44 [2021-02-19 17:21:24,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:21:24,455 INFO L480 AbstractCegarLoop]: Abstraction has 95022 states and 219445 transitions. [2021-02-19 17:21:24,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:24,455 INFO L276 IsEmpty]: Start isEmpty. Operand 95022 states and 219445 transitions. [2021-02-19 17:21:24,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 17:21:24,498 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:21:24,498 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:21:24,698 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-02-19 17:21:24,698 INFO L428 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:21:24,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:21:24,698 INFO L82 PathProgramCache]: Analyzing trace with hash 103084028, now seen corresponding path program 168 times [2021-02-19 17:21:24,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:21:24,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595401855] [2021-02-19 17:21:24,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:21:24,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:21:24,961 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:21:24,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595401855] [2021-02-19 17:21:24,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752314194] [2021-02-19 17:21:24,962 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:24,985 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-02-19 17:21:24,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:21:24,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 17:21:24,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:21:25,527 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:21:25,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:21:25,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-02-19 17:21:25,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190750289] [2021-02-19 17:21:25,527 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 17:21:25,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:21:25,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 17:21:25,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=860, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:21:25,528 INFO L87 Difference]: Start difference. First operand 95022 states and 219445 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:28,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:21:28,002 INFO L93 Difference]: Finished difference Result 102468 states and 235515 transitions. [2021-02-19 17:21:28,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-02-19 17:21:28,003 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-02-19 17:21:28,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:21:28,141 INFO L225 Difference]: With dead ends: 102468 [2021-02-19 17:21:28,141 INFO L226 Difference]: Without dead ends: 102434 [2021-02-19 17:21:28,142 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=154, Invalid=2102, Unknown=0, NotChecked=0, Total=2256 [2021-02-19 17:21:28,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102434 states. [2021-02-19 17:21:29,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102434 to 96867. [2021-02-19 17:21:29,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96867 states, 96866 states have (on average 2.3116573410691057) internal successors, (223921), 96866 states have internal predecessors, (223921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:29,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96867 states to 96867 states and 223921 transitions. [2021-02-19 17:21:29,577 INFO L78 Accepts]: Start accepts. Automaton has 96867 states and 223921 transitions. Word has length 44 [2021-02-19 17:21:29,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:21:29,577 INFO L480 AbstractCegarLoop]: Abstraction has 96867 states and 223921 transitions. [2021-02-19 17:21:29,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:29,577 INFO L276 IsEmpty]: Start isEmpty. Operand 96867 states and 223921 transitions. [2021-02-19 17:21:29,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 17:21:29,959 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:21:29,959 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:21:30,173 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-02-19 17:21:30,173 INFO L428 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:21:30,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:21:30,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1983818036, now seen corresponding path program 169 times [2021-02-19 17:21:30,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:21:30,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492907321] [2021-02-19 17:21:30,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:21:30,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:21:30,479 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:21:30,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492907321] [2021-02-19 17:21:30,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465288371] [2021-02-19 17:21:30,479 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:30,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:21:30,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 17:21:30,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:21:30,939 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:21:30,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:21:30,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-02-19 17:21:30,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179729015] [2021-02-19 17:21:30,940 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 17:21:30,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:21:30,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 17:21:30,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:21:30,940 INFO L87 Difference]: Start difference. First operand 96867 states and 223921 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:32,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:21:32,696 INFO L93 Difference]: Finished difference Result 98052 states and 226487 transitions. [2021-02-19 17:21:32,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-02-19 17:21:32,697 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-02-19 17:21:32,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:21:32,820 INFO L225 Difference]: With dead ends: 98052 [2021-02-19 17:21:32,820 INFO L226 Difference]: Without dead ends: 98018 [2021-02-19 17:21:32,821 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=133, Invalid=1507, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 17:21:32,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98018 states. [2021-02-19 17:21:34,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98018 to 97513. [2021-02-19 17:21:34,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97513 states, 97512 states have (on average 2.3119000738370663) internal successors, (225438), 97512 states have internal predecessors, (225438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:34,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97513 states to 97513 states and 225438 transitions. [2021-02-19 17:21:34,488 INFO L78 Accepts]: Start accepts. Automaton has 97513 states and 225438 transitions. Word has length 44 [2021-02-19 17:21:34,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:21:34,488 INFO L480 AbstractCegarLoop]: Abstraction has 97513 states and 225438 transitions. [2021-02-19 17:21:34,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:34,488 INFO L276 IsEmpty]: Start isEmpty. Operand 97513 states and 225438 transitions. [2021-02-19 17:21:34,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 17:21:34,533 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:21:34,533 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:21:34,733 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:34,733 INFO L428 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:21:34,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:21:34,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1943101180, now seen corresponding path program 170 times [2021-02-19 17:21:34,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:21:34,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656423691] [2021-02-19 17:21:34,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:21:34,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:21:34,996 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:21:34,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656423691] [2021-02-19 17:21:34,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612725960] [2021-02-19 17:21:34,996 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:35,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:21:35,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:21:35,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 17:21:35,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:21:35,494 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:21:35,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:21:35,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 28 [2021-02-19 17:21:35,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185761676] [2021-02-19 17:21:35,494 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-02-19 17:21:35,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:21:35,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-02-19 17:21:35,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=742, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:21:35,495 INFO L87 Difference]: Start difference. First operand 97513 states and 225438 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 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) [2021-02-19 17:21:36,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:21:36,979 INFO L93 Difference]: Finished difference Result 97953 states and 226362 transitions. [2021-02-19 17:21:36,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 17:21:36,981 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 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 44 [2021-02-19 17:21:36,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:21:37,099 INFO L225 Difference]: With dead ends: 97953 [2021-02-19 17:21:37,100 INFO L226 Difference]: Without dead ends: 97919 [2021-02-19 17:21:37,100 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=139, Invalid=1501, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 17:21:37,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97919 states. [2021-02-19 17:21:38,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97919 to 97846. [2021-02-19 17:21:38,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97846 states, 97845 states have (on average 2.3113802442638867) internal successors, (226157), 97845 states have internal predecessors, (226157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:38,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97846 states to 97846 states and 226157 transitions. [2021-02-19 17:21:38,770 INFO L78 Accepts]: Start accepts. Automaton has 97846 states and 226157 transitions. Word has length 44 [2021-02-19 17:21:38,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:21:38,770 INFO L480 AbstractCegarLoop]: Abstraction has 97846 states and 226157 transitions. [2021-02-19 17:21:38,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 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) [2021-02-19 17:21:38,770 INFO L276 IsEmpty]: Start isEmpty. Operand 97846 states and 226157 transitions. [2021-02-19 17:21:38,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 17:21:38,813 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:21:38,813 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:21:39,014 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:39,014 INFO L428 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:21:39,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:21:39,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1665690108, now seen corresponding path program 171 times [2021-02-19 17:21:39,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:21:39,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627920464] [2021-02-19 17:21:39,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:21:39,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:21:39,277 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:21:39,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627920464] [2021-02-19 17:21:39,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162240343] [2021-02-19 17:21:39,277 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:39,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-02-19 17:21:39,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:21:39,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 17:21:39,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:21:39,843 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:21:39,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:21:39,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-02-19 17:21:39,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210875119] [2021-02-19 17:21:39,843 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 17:21:39,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:21:39,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 17:21:39,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=860, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:21:39,843 INFO L87 Difference]: Start difference. First operand 97846 states and 226157 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:42,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:21:42,388 INFO L93 Difference]: Finished difference Result 107624 states and 247584 transitions. [2021-02-19 17:21:42,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-02-19 17:21:42,389 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-02-19 17:21:42,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:21:42,536 INFO L225 Difference]: With dead ends: 107624 [2021-02-19 17:21:42,537 INFO L226 Difference]: Without dead ends: 107555 [2021-02-19 17:21:42,537 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=178, Invalid=2272, Unknown=0, NotChecked=0, Total=2450 [2021-02-19 17:21:42,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107555 states. [2021-02-19 17:21:43,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107555 to 101908. [2021-02-19 17:21:43,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101908 states, 101907 states have (on average 2.3131286368944233) internal successors, (235724), 101907 states have internal predecessors, (235724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:44,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101908 states to 101908 states and 235724 transitions. [2021-02-19 17:21:44,117 INFO L78 Accepts]: Start accepts. Automaton has 101908 states and 235724 transitions. Word has length 44 [2021-02-19 17:21:44,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:21:44,117 INFO L480 AbstractCegarLoop]: Abstraction has 101908 states and 235724 transitions. [2021-02-19 17:21:44,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:44,117 INFO L276 IsEmpty]: Start isEmpty. Operand 101908 states and 235724 transitions. [2021-02-19 17:21:44,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 17:21:44,161 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:21:44,161 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:21:44,362 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:44,362 INFO L428 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:21:44,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:21:44,362 INFO L82 PathProgramCache]: Analyzing trace with hash -662545160, now seen corresponding path program 172 times [2021-02-19 17:21:44,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:21:44,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277430978] [2021-02-19 17:21:44,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:21:44,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:21:44,627 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:21:44,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277430978] [2021-02-19 17:21:44,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077523312] [2021-02-19 17:21:44,627 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:44,645 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:21:44,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:21:44,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 17:21:44,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:21:45,589 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:21:45,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:21:45,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-02-19 17:21:45,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763898611] [2021-02-19 17:21:45,590 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 17:21:45,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:21:45,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 17:21:45,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=797, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:21:45,590 INFO L87 Difference]: Start difference. First operand 101908 states and 235724 transitions. Second operand has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 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) [2021-02-19 17:21:47,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:21:47,462 INFO L93 Difference]: Finished difference Result 105337 states and 243024 transitions. [2021-02-19 17:21:47,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-02-19 17:21:47,464 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 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 44 [2021-02-19 17:21:47,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:21:47,605 INFO L225 Difference]: With dead ends: 105337 [2021-02-19 17:21:47,605 INFO L226 Difference]: Without dead ends: 105303 [2021-02-19 17:21:47,605 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=165, Invalid=1905, Unknown=0, NotChecked=0, Total=2070 [2021-02-19 17:21:47,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105303 states. [2021-02-19 17:21:49,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105303 to 102649. [2021-02-19 17:21:49,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102649 states, 102648 states have (on average 2.3128361000701427) internal successors, (237408), 102648 states have internal predecessors, (237408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:49,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102649 states to 102649 states and 237408 transitions. [2021-02-19 17:21:49,414 INFO L78 Accepts]: Start accepts. Automaton has 102649 states and 237408 transitions. Word has length 44 [2021-02-19 17:21:49,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:21:49,414 INFO L480 AbstractCegarLoop]: Abstraction has 102649 states and 237408 transitions. [2021-02-19 17:21:49,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 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) [2021-02-19 17:21:49,414 INFO L276 IsEmpty]: Start isEmpty. Operand 102649 states and 237408 transitions. [2021-02-19 17:21:49,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 17:21:49,457 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:21:49,457 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:21:49,657 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:49,657 INFO L428 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:21:49,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:21:49,658 INFO L82 PathProgramCache]: Analyzing trace with hash -281429106, now seen corresponding path program 173 times [2021-02-19 17:21:49,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:21:49,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912102136] [2021-02-19 17:21:49,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:21:49,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:21:49,928 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:21:49,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912102136] [2021-02-19 17:21:49,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955626109] [2021-02-19 17:21:49,928 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:49,949 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 17:21:49,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:21:49,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 17:21:49,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:21:50,607 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:21:50,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:21:50,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 32 [2021-02-19 17:21:50,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679336342] [2021-02-19 17:21:50,608 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 17:21:50,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:21:50,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 17:21:50,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=977, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 17:21:50,608 INFO L87 Difference]: Start difference. First operand 102649 states and 237408 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:53,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:21:53,283 INFO L93 Difference]: Finished difference Result 106385 states and 245433 transitions. [2021-02-19 17:21:53,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-02-19 17:21:53,285 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-02-19 17:21:53,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:21:53,429 INFO L225 Difference]: With dead ends: 106385 [2021-02-19 17:21:53,429 INFO L226 Difference]: Without dead ends: 106368 [2021-02-19 17:21:53,430 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=206, Invalid=2656, Unknown=0, NotChecked=0, Total=2862 [2021-02-19 17:21:53,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106368 states. [2021-02-19 17:21:54,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106368 to 103417. [2021-02-19 17:21:54,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103417 states, 103416 states have (on average 2.313549160671463) internal successors, (239258), 103416 states have internal predecessors, (239258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:54,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103417 states to 103417 states and 239258 transitions. [2021-02-19 17:21:54,951 INFO L78 Accepts]: Start accepts. Automaton has 103417 states and 239258 transitions. Word has length 44 [2021-02-19 17:21:54,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:21:54,951 INFO L480 AbstractCegarLoop]: Abstraction has 103417 states and 239258 transitions. [2021-02-19 17:21:54,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:54,952 INFO L276 IsEmpty]: Start isEmpty. Operand 103417 states and 239258 transitions. [2021-02-19 17:21:54,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 17:21:54,994 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:21:54,994 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:21:55,195 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:55,195 INFO L428 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:21:55,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:21:55,195 INFO L82 PathProgramCache]: Analyzing trace with hash -559901294, now seen corresponding path program 174 times [2021-02-19 17:21:55,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:21:55,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581397276] [2021-02-19 17:21:55,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:21:55,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:21:55,471 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:21:55,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581397276] [2021-02-19 17:21:55,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245280314] [2021-02-19 17:21:55,471 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:21:55,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 17:21:55,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:21:55,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 17:21:55,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:21:56,060 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:21:56,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:21:56,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-02-19 17:21:56,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154146253] [2021-02-19 17:21:56,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 17:21:56,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:21:56,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 17:21:56,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=860, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:21:56,061 INFO L87 Difference]: Start difference. First operand 103417 states and 239258 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:21:58,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:21:58,760 INFO L93 Difference]: Finished difference Result 113434 states and 261363 transitions. [2021-02-19 17:21:58,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-02-19 17:21:58,761 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-02-19 17:21:58,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:21:58,913 INFO L225 Difference]: With dead ends: 113434 [2021-02-19 17:21:58,913 INFO L226 Difference]: Without dead ends: 113400 [2021-02-19 17:21:58,914 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=170, Invalid=2280, Unknown=0, NotChecked=0, Total=2450 [2021-02-19 17:21:59,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113400 states. [2021-02-19 17:22:00,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113400 to 107359. [2021-02-19 17:22:00,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107359 states, 107358 states have (on average 2.3174612045678944) internal successors, (248798), 107358 states have internal predecessors, (248798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:01,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107359 states to 107359 states and 248798 transitions. [2021-02-19 17:22:01,033 INFO L78 Accepts]: Start accepts. Automaton has 107359 states and 248798 transitions. Word has length 44 [2021-02-19 17:22:01,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:01,033 INFO L480 AbstractCegarLoop]: Abstraction has 107359 states and 248798 transitions. [2021-02-19 17:22:01,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:01,033 INFO L276 IsEmpty]: Start isEmpty. Operand 107359 states and 248798 transitions. [2021-02-19 17:22:01,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 17:22:01,108 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:01,108 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:01,308 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:01,308 INFO L428 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:01,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:01,309 INFO L82 PathProgramCache]: Analyzing trace with hash -600618150, now seen corresponding path program 175 times [2021-02-19 17:22:01,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:01,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782848827] [2021-02-19 17:22:01,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:01,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:01,664 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:01,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782848827] [2021-02-19 17:22:01,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652610501] [2021-02-19 17:22:01,664 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:01,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:01,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 17:22:01,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:02,185 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:22:02,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:02,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 28 [2021-02-19 17:22:02,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748567045] [2021-02-19 17:22:02,186 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-02-19 17:22:02,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:02,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-02-19 17:22:02,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=742, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:22:02,186 INFO L87 Difference]: Start difference. First operand 107359 states and 248798 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 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) [2021-02-19 17:22:04,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:04,169 INFO L93 Difference]: Finished difference Result 107947 states and 250062 transitions. [2021-02-19 17:22:04,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-02-19 17:22:04,171 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 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 44 [2021-02-19 17:22:04,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:04,315 INFO L225 Difference]: With dead ends: 107947 [2021-02-19 17:22:04,315 INFO L226 Difference]: Without dead ends: 107913 [2021-02-19 17:22:04,315 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=147, Invalid=1575, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 17:22:04,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107913 states. [2021-02-19 17:22:05,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107913 to 107616. [2021-02-19 17:22:05,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107616 states, 107615 states have (on average 2.3171490963155694) internal successors, (249360), 107615 states have internal predecessors, (249360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:05,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107616 states to 107616 states and 249360 transitions. [2021-02-19 17:22:05,817 INFO L78 Accepts]: Start accepts. Automaton has 107616 states and 249360 transitions. Word has length 44 [2021-02-19 17:22:05,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:05,817 INFO L480 AbstractCegarLoop]: Abstraction has 107616 states and 249360 transitions. [2021-02-19 17:22:05,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 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) [2021-02-19 17:22:05,818 INFO L276 IsEmpty]: Start isEmpty. Operand 107616 states and 249360 transitions. [2021-02-19 17:22:05,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 17:22:05,860 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:05,860 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:06,061 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:06,061 INFO L428 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:06,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:06,061 INFO L82 PathProgramCache]: Analyzing trace with hash -198137198, now seen corresponding path program 176 times [2021-02-19 17:22:06,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:06,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620780146] [2021-02-19 17:22:06,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:06,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:06,343 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:06,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620780146] [2021-02-19 17:22:06,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946771779] [2021-02-19 17:22:06,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:06,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:22:06,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:22:06,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 17:22:06,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:06,904 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:22:06,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:06,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-02-19 17:22:06,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87501913] [2021-02-19 17:22:06,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 17:22:06,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:06,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 17:22:06,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=797, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:22:06,905 INFO L87 Difference]: Start difference. First operand 107616 states and 249360 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:09,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:09,178 INFO L93 Difference]: Finished difference Result 108285 states and 250781 transitions. [2021-02-19 17:22:09,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 17:22:09,179 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-02-19 17:22:09,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:09,326 INFO L225 Difference]: With dead ends: 108285 [2021-02-19 17:22:09,326 INFO L226 Difference]: Without dead ends: 108251 [2021-02-19 17:22:09,326 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=161, Invalid=1819, Unknown=0, NotChecked=0, Total=1980 [2021-02-19 17:22:09,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108251 states. [2021-02-19 17:22:10,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108251 to 107958. [2021-02-19 17:22:10,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107958 states, 107957 states have (on average 2.316616801133785) internal successors, (250095), 107957 states have internal predecessors, (250095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:10,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107958 states to 107958 states and 250095 transitions. [2021-02-19 17:22:10,949 INFO L78 Accepts]: Start accepts. Automaton has 107958 states and 250095 transitions. Word has length 44 [2021-02-19 17:22:10,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:10,950 INFO L480 AbstractCegarLoop]: Abstraction has 107958 states and 250095 transitions. [2021-02-19 17:22:10,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:10,950 INFO L276 IsEmpty]: Start isEmpty. Operand 107958 states and 250095 transitions. [2021-02-19 17:22:11,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 17:22:11,373 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:11,373 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:11,593 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:11,593 INFO L428 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:11,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:11,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1198051750, now seen corresponding path program 177 times [2021-02-19 17:22:11,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:11,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331782962] [2021-02-19 17:22:11,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:11,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:11,876 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:11,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331782962] [2021-02-19 17:22:11,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255836549] [2021-02-19 17:22:11,876 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:11,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-02-19 17:22:11,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:22:11,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 17:22:11,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:12,474 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:22:12,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:12,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-02-19 17:22:12,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875076416] [2021-02-19 17:22:12,474 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 17:22:12,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:12,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 17:22:12,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=858, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:22:12,475 INFO L87 Difference]: Start difference. First operand 107958 states and 250095 transitions. Second operand has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:14,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:14,828 INFO L93 Difference]: Finished difference Result 113083 states and 261318 transitions. [2021-02-19 17:22:14,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-02-19 17:22:14,830 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-02-19 17:22:14,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:14,987 INFO L225 Difference]: With dead ends: 113083 [2021-02-19 17:22:14,987 INFO L226 Difference]: Without dead ends: 113048 [2021-02-19 17:22:14,988 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=190, Invalid=2360, Unknown=0, NotChecked=0, Total=2550 [2021-02-19 17:22:15,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113048 states. [2021-02-19 17:22:16,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113048 to 110015. [2021-02-19 17:22:16,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110015 states, 110014 states have (on average 2.316923300670824) internal successors, (254894), 110014 states have internal predecessors, (254894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:16,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110015 states to 110015 states and 254894 transitions. [2021-02-19 17:22:16,734 INFO L78 Accepts]: Start accepts. Automaton has 110015 states and 254894 transitions. Word has length 44 [2021-02-19 17:22:16,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:16,734 INFO L480 AbstractCegarLoop]: Abstraction has 110015 states and 254894 transitions. [2021-02-19 17:22:16,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:16,734 INFO L276 IsEmpty]: Start isEmpty. Operand 110015 states and 254894 transitions. [2021-02-19 17:22:16,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 17:22:16,779 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:16,779 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:16,979 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:16,980 INFO L428 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:16,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:16,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1181954262, now seen corresponding path program 178 times [2021-02-19 17:22:16,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:16,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742110049] [2021-02-19 17:22:16,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:16,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:17,272 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:17,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742110049] [2021-02-19 17:22:17,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698775614] [2021-02-19 17:22:17,273 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:17,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:22:17,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:22:17,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 17:22:17,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:17,762 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 3 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:22:17,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:17,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-02-19 17:22:17,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535977235] [2021-02-19 17:22:17,762 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 17:22:17,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:17,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 17:22:17,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:22:17,763 INFO L87 Difference]: Start difference. First operand 110015 states and 254894 transitions. Second operand has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:19,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:19,620 INFO L93 Difference]: Finished difference Result 113021 states and 261647 transitions. [2021-02-19 17:22:19,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 17:22:19,621 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-02-19 17:22:19,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:19,774 INFO L225 Difference]: With dead ends: 113021 [2021-02-19 17:22:19,774 INFO L226 Difference]: Without dead ends: 112978 [2021-02-19 17:22:19,774 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=127, Invalid=1279, Unknown=0, NotChecked=0, Total=1406 [2021-02-19 17:22:19,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112978 states. [2021-02-19 17:22:21,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112978 to 112408. [2021-02-19 17:22:21,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112408 states, 112407 states have (on average 2.317604775503305) internal successors, (260515), 112407 states have internal predecessors, (260515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:21,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112408 states to 112408 states and 260515 transitions. [2021-02-19 17:22:21,523 INFO L78 Accepts]: Start accepts. Automaton has 112408 states and 260515 transitions. Word has length 44 [2021-02-19 17:22:21,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:21,523 INFO L480 AbstractCegarLoop]: Abstraction has 112408 states and 260515 transitions. [2021-02-19 17:22:21,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:21,523 INFO L276 IsEmpty]: Start isEmpty. Operand 112408 states and 260515 transitions. [2021-02-19 17:22:21,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 17:22:21,572 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:21,572 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:21,772 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-02-19 17:22:21,773 INFO L428 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:21,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:21,773 INFO L82 PathProgramCache]: Analyzing trace with hash -56695138, now seen corresponding path program 179 times [2021-02-19 17:22:21,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:21,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766809576] [2021-02-19 17:22:21,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:21,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:22,077 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:22,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766809576] [2021-02-19 17:22:22,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857480886] [2021-02-19 17:22:22,077 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:22,096 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-02-19 17:22:22,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:22:22,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 17:22:22,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:23,059 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 3 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:22:23,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:23,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 28 [2021-02-19 17:22:23,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881630799] [2021-02-19 17:22:23,060 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-02-19 17:22:23,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:23,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-02-19 17:22:23,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=741, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:22:23,060 INFO L87 Difference]: Start difference. First operand 112408 states and 260515 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 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) [2021-02-19 17:22:24,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:24,539 INFO L93 Difference]: Finished difference Result 113524 states and 262883 transitions. [2021-02-19 17:22:24,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 17:22:24,540 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 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 44 [2021-02-19 17:22:24,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:24,700 INFO L225 Difference]: With dead ends: 113524 [2021-02-19 17:22:24,700 INFO L226 Difference]: Without dead ends: 113481 [2021-02-19 17:22:24,701 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=140, Invalid=1500, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 17:22:24,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113481 states. [2021-02-19 17:22:26,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113481 to 113164. [2021-02-19 17:22:26,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113164 states, 113163 states have (on average 2.3171796435230596) internal successors, (262219), 113163 states have internal predecessors, (262219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:26,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113164 states to 113164 states and 262219 transitions. [2021-02-19 17:22:26,727 INFO L78 Accepts]: Start accepts. Automaton has 113164 states and 262219 transitions. Word has length 44 [2021-02-19 17:22:26,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:26,727 INFO L480 AbstractCegarLoop]: Abstraction has 113164 states and 262219 transitions. [2021-02-19 17:22:26,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 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) [2021-02-19 17:22:26,727 INFO L276 IsEmpty]: Start isEmpty. Operand 113164 states and 262219 transitions. [2021-02-19 17:22:26,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 17:22:26,768 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:26,768 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:26,973 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:26,974 INFO L428 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:26,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:26,974 INFO L82 PathProgramCache]: Analyzing trace with hash 345785814, now seen corresponding path program 180 times [2021-02-19 17:22:26,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:26,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435800455] [2021-02-19 17:22:26,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:26,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:27,264 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:27,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435800455] [2021-02-19 17:22:27,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597274051] [2021-02-19 17:22:27,264 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:27,283 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-02-19 17:22:27,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:22:27,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 17:22:27,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:27,848 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 3 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:22:27,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:27,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-02-19 17:22:27,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166091432] [2021-02-19 17:22:27,848 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 17:22:27,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:27,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 17:22:27,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=796, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:22:27,849 INFO L87 Difference]: Start difference. First operand 113164 states and 262219 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:30,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:30,083 INFO L93 Difference]: Finished difference Result 122596 states and 283278 transitions. [2021-02-19 17:22:30,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-02-19 17:22:30,085 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-02-19 17:22:30,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:30,244 INFO L225 Difference]: With dead ends: 122596 [2021-02-19 17:22:30,244 INFO L226 Difference]: Without dead ends: 122544 [2021-02-19 17:22:30,244 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=161, Invalid=1819, Unknown=0, NotChecked=0, Total=1980 [2021-02-19 17:22:30,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122544 states. [2021-02-19 17:22:31,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122544 to 115729. [2021-02-19 17:22:31,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115729 states, 115728 states have (on average 2.3181425411309275) internal successors, (268274), 115728 states have internal predecessors, (268274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:31,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115729 states to 115729 states and 268274 transitions. [2021-02-19 17:22:31,875 INFO L78 Accepts]: Start accepts. Automaton has 115729 states and 268274 transitions. Word has length 44 [2021-02-19 17:22:31,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:31,875 INFO L480 AbstractCegarLoop]: Abstraction has 115729 states and 268274 transitions. [2021-02-19 17:22:31,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:31,875 INFO L276 IsEmpty]: Start isEmpty. Operand 115729 states and 268274 transitions. [2021-02-19 17:22:31,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 17:22:31,923 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:31,923 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:32,126 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2021-02-19 17:22:32,126 INFO L428 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:32,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:32,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1379981564, now seen corresponding path program 181 times [2021-02-19 17:22:32,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:32,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987845537] [2021-02-19 17:22:32,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:32,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:32,418 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:32,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987845537] [2021-02-19 17:22:32,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038900180] [2021-02-19 17:22:32,418 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:32,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:32,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 17:22:32,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:32,959 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:22:32,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:32,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 28 [2021-02-19 17:22:32,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791026746] [2021-02-19 17:22:32,960 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-02-19 17:22:32,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:32,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-02-19 17:22:32,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=742, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:22:32,960 INFO L87 Difference]: Start difference. First operand 115729 states and 268274 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 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) [2021-02-19 17:22:34,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:34,714 INFO L93 Difference]: Finished difference Result 116567 states and 270039 transitions. [2021-02-19 17:22:34,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 17:22:34,716 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 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 44 [2021-02-19 17:22:34,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:34,877 INFO L225 Difference]: With dead ends: 116567 [2021-02-19 17:22:34,878 INFO L226 Difference]: Without dead ends: 116541 [2021-02-19 17:22:34,878 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=123, Invalid=1283, Unknown=0, NotChecked=0, Total=1406 [2021-02-19 17:22:34,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116541 states. [2021-02-19 17:22:36,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116541 to 116235. [2021-02-19 17:22:36,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116235 states, 116234 states have (on average 2.317944835418208) internal successors, (269424), 116234 states have internal predecessors, (269424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:36,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116235 states to 116235 states and 269424 transitions. [2021-02-19 17:22:36,961 INFO L78 Accepts]: Start accepts. Automaton has 116235 states and 269424 transitions. Word has length 44 [2021-02-19 17:22:36,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:36,962 INFO L480 AbstractCegarLoop]: Abstraction has 116235 states and 269424 transitions. [2021-02-19 17:22:36,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 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) [2021-02-19 17:22:36,962 INFO L276 IsEmpty]: Start isEmpty. Operand 116235 states and 269424 transitions. [2021-02-19 17:22:37,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 17:22:37,007 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:37,007 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:37,216 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:37,216 INFO L428 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:37,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:37,216 INFO L82 PathProgramCache]: Analyzing trace with hash -977500612, now seen corresponding path program 182 times [2021-02-19 17:22:37,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:37,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68630435] [2021-02-19 17:22:37,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:37,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:37,509 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:37,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68630435] [2021-02-19 17:22:37,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725009893] [2021-02-19 17:22:37,509 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:37,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:22:37,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:22:37,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 17:22:37,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:38,094 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:22:38,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:38,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-02-19 17:22:38,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848960456] [2021-02-19 17:22:38,095 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 17:22:38,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:38,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 17:22:38,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=797, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:22:38,095 INFO L87 Difference]: Start difference. First operand 116235 states and 269424 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:40,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:40,074 INFO L93 Difference]: Finished difference Result 120186 states and 278104 transitions. [2021-02-19 17:22:40,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 17:22:40,075 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-02-19 17:22:40,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:40,560 INFO L225 Difference]: With dead ends: 120186 [2021-02-19 17:22:40,561 INFO L226 Difference]: Without dead ends: 120151 [2021-02-19 17:22:40,561 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=131, Invalid=1429, Unknown=0, NotChecked=0, Total=1560 [2021-02-19 17:22:40,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120151 states. [2021-02-19 17:22:41,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120151 to 118696. [2021-02-19 17:22:41,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118696 states, 118695 states have (on average 2.3184548633051096) internal successors, (275189), 118695 states have internal predecessors, (275189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:42,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118696 states to 118696 states and 275189 transitions. [2021-02-19 17:22:42,185 INFO L78 Accepts]: Start accepts. Automaton has 118696 states and 275189 transitions. Word has length 44 [2021-02-19 17:22:42,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:42,185 INFO L480 AbstractCegarLoop]: Abstraction has 118696 states and 275189 transitions. [2021-02-19 17:22:42,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:42,185 INFO L276 IsEmpty]: Start isEmpty. Operand 118696 states and 275189 transitions. [2021-02-19 17:22:42,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 17:22:42,233 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:42,233 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:42,433 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:42,434 INFO L428 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:42,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:42,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1062555622, now seen corresponding path program 183 times [2021-02-19 17:22:42,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:42,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803934442] [2021-02-19 17:22:42,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:42,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:42,730 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:42,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803934442] [2021-02-19 17:22:42,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183435007] [2021-02-19 17:22:42,730 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:42,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-02-19 17:22:42,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:22:42,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 17:22:42,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:43,356 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:22:43,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:43,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-02-19 17:22:43,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192969110] [2021-02-19 17:22:43,356 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 17:22:43,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:43,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 17:22:43,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=860, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:22:43,357 INFO L87 Difference]: Start difference. First operand 118696 states and 275189 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:46,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:46,529 INFO L93 Difference]: Finished difference Result 121717 states and 281691 transitions. [2021-02-19 17:22:46,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-02-19 17:22:46,530 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-02-19 17:22:46,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:46,695 INFO L225 Difference]: With dead ends: 121717 [2021-02-19 17:22:46,695 INFO L226 Difference]: Without dead ends: 121674 [2021-02-19 17:22:46,696 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=166, Invalid=2284, Unknown=0, NotChecked=0, Total=2450 [2021-02-19 17:22:46,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121674 states. [2021-02-19 17:22:48,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121674 to 120316. [2021-02-19 17:22:48,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120316 states, 120315 states have (on average 2.3182146864480737) internal successors, (278916), 120315 states have internal predecessors, (278916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:48,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120316 states to 120316 states and 278916 transitions. [2021-02-19 17:22:48,701 INFO L78 Accepts]: Start accepts. Automaton has 120316 states and 278916 transitions. Word has length 44 [2021-02-19 17:22:48,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:48,701 INFO L480 AbstractCegarLoop]: Abstraction has 120316 states and 278916 transitions. [2021-02-19 17:22:48,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:48,701 INFO L276 IsEmpty]: Start isEmpty. Operand 120316 states and 278916 transitions. [2021-02-19 17:22:48,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 17:22:48,744 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:48,744 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:48,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2021-02-19 17:22:48,945 INFO L428 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:48,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:48,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1299992892, now seen corresponding path program 184 times [2021-02-19 17:22:48,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:48,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411914687] [2021-02-19 17:22:48,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:48,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:49,243 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:49,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411914687] [2021-02-19 17:22:49,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810704644] [2021-02-19 17:22:49,244 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:49,261 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:22:49,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:22:49,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 17:22:49,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:49,839 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:22:49,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:49,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 29 [2021-02-19 17:22:49,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299254204] [2021-02-19 17:22:49,840 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 17:22:49,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:49,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 17:22:49,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=796, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:22:49,840 INFO L87 Difference]: Start difference. First operand 120316 states and 278916 transitions. Second operand has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 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) [2021-02-19 17:22:51,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:51,723 INFO L93 Difference]: Finished difference Result 124683 states and 288562 transitions. [2021-02-19 17:22:51,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 17:22:51,724 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 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 44 [2021-02-19 17:22:51,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:51,889 INFO L225 Difference]: With dead ends: 124683 [2021-02-19 17:22:51,889 INFO L226 Difference]: Without dead ends: 124640 [2021-02-19 17:22:51,889 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=129, Invalid=1353, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 17:22:51,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124640 states. [2021-02-19 17:22:53,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124640 to 123298. [2021-02-19 17:22:53,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123298 states, 123297 states have (on average 2.3185722280347454) internal successors, (285873), 123297 states have internal predecessors, (285873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:53,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123298 states to 123298 states and 285873 transitions. [2021-02-19 17:22:53,603 INFO L78 Accepts]: Start accepts. Automaton has 123298 states and 285873 transitions. Word has length 44 [2021-02-19 17:22:53,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:53,603 INFO L480 AbstractCegarLoop]: Abstraction has 123298 states and 285873 transitions. [2021-02-19 17:22:53,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 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) [2021-02-19 17:22:53,603 INFO L276 IsEmpty]: Start isEmpty. Operand 123298 states and 285873 transitions. [2021-02-19 17:22:53,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 17:22:53,649 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:53,649 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:53,849 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:53,849 INFO L428 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:53,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:53,850 INFO L82 PathProgramCache]: Analyzing trace with hash -813421320, now seen corresponding path program 185 times [2021-02-19 17:22:53,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:53,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469787741] [2021-02-19 17:22:53,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:53,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:54,160 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:54,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469787741] [2021-02-19 17:22:54,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613039928] [2021-02-19 17:22:54,161 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:54,179 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-02-19 17:22:54,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:22:54,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 17:22:54,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:55,147 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:22:55,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:55,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-02-19 17:22:55,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296055447] [2021-02-19 17:22:55,147 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 17:22:55,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:55,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 17:22:55,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:22:55,147 INFO L87 Difference]: Start difference. First operand 123298 states and 285873 transitions. Second operand has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:56,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:56,875 INFO L93 Difference]: Finished difference Result 124836 states and 289269 transitions. [2021-02-19 17:22:56,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-02-19 17:22:56,876 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-02-19 17:22:56,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:57,044 INFO L225 Difference]: With dead ends: 124836 [2021-02-19 17:22:57,044 INFO L226 Difference]: Without dead ends: 124802 [2021-02-19 17:22:57,044 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=131, Invalid=1351, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 17:22:57,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124802 states. [2021-02-19 17:22:58,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124802 to 124438. [2021-02-19 17:22:58,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124438 states, 124437 states have (on average 2.3188521099030033) internal successors, (288551), 124437 states have internal predecessors, (288551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:59,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124438 states to 124438 states and 288551 transitions. [2021-02-19 17:22:59,041 INFO L78 Accepts]: Start accepts. Automaton has 124438 states and 288551 transitions. Word has length 44 [2021-02-19 17:22:59,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:59,042 INFO L480 AbstractCegarLoop]: Abstraction has 124438 states and 288551 transitions. [2021-02-19 17:22:59,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:59,042 INFO L276 IsEmpty]: Start isEmpty. Operand 124438 states and 288551 transitions. [2021-02-19 17:22:59,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 17:22:59,097 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:59,097 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:59,297 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:59,297 INFO L428 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:59,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:59,297 INFO L82 PathProgramCache]: Analyzing trace with hash -2052070720, now seen corresponding path program 186 times [2021-02-19 17:22:59,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:59,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076058185] [2021-02-19 17:22:59,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:59,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:59,598 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:59,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076058185] [2021-02-19 17:22:59,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685793491] [2021-02-19 17:22:59,598 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:59,619 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-02-19 17:22:59,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:22:59,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 17:22:59,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:00,374 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:00,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:00,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 33 [2021-02-19 17:23:00,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972948044] [2021-02-19 17:23:00,374 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 17:23:00,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:00,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 17:23:00,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1042, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 17:23:00,375 INFO L87 Difference]: Start difference. First operand 124438 states and 288551 transitions. Second operand has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:01,992 WARN L202 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 21 [2021-02-19 17:23:03,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:03,865 INFO L93 Difference]: Finished difference Result 131445 states and 303815 transitions. [2021-02-19 17:23:03,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-02-19 17:23:03,867 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-02-19 17:23:03,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:04,044 INFO L225 Difference]: With dead ends: 131445 [2021-02-19 17:23:04,044 INFO L226 Difference]: Without dead ends: 131411 [2021-02-19 17:23:04,044 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=208, Invalid=2654, Unknown=0, NotChecked=0, Total=2862 [2021-02-19 17:23:04,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131411 states. [2021-02-19 17:23:05,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131411 to 127435. [2021-02-19 17:23:05,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127435 states, 127434 states have (on average 2.3191299025377843) internal successors, (295536), 127434 states have internal predecessors, (295536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:06,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127435 states to 127435 states and 295536 transitions. [2021-02-19 17:23:06,102 INFO L78 Accepts]: Start accepts. Automaton has 127435 states and 295536 transitions. Word has length 44 [2021-02-19 17:23:06,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:06,102 INFO L480 AbstractCegarLoop]: Abstraction has 127435 states and 295536 transitions. [2021-02-19 17:23:06,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:06,102 INFO L276 IsEmpty]: Start isEmpty. Operand 127435 states and 295536 transitions. [2021-02-19 17:23:06,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 17:23:06,158 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:06,158 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:06,358 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:06,358 INFO L428 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:06,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:06,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1649589768, now seen corresponding path program 187 times [2021-02-19 17:23:06,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:06,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850209257] [2021-02-19 17:23:06,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:06,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:06,666 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:06,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850209257] [2021-02-19 17:23:06,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090197491] [2021-02-19 17:23:06,666 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:06,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:06,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 17:23:06,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:07,288 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:07,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:07,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-02-19 17:23:07,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073560701] [2021-02-19 17:23:07,288 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 17:23:07,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:07,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 17:23:07,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:23:07,289 INFO L87 Difference]: Start difference. First operand 127435 states and 295536 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:09,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:09,422 INFO L93 Difference]: Finished difference Result 127848 states and 296398 transitions. [2021-02-19 17:23:09,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-02-19 17:23:09,423 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-02-19 17:23:09,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:09,596 INFO L225 Difference]: With dead ends: 127848 [2021-02-19 17:23:09,596 INFO L226 Difference]: Without dead ends: 127814 [2021-02-19 17:23:09,596 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=158, Invalid=1822, Unknown=0, NotChecked=0, Total=1980 [2021-02-19 17:23:09,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127814 states. [2021-02-19 17:23:11,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127814 to 127775. [2021-02-19 17:23:11,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127775 states, 127774 states have (on average 2.318585940801728) internal successors, (296255), 127774 states have internal predecessors, (296255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:11,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127775 states to 127775 states and 296255 transitions. [2021-02-19 17:23:11,872 INFO L78 Accepts]: Start accepts. Automaton has 127775 states and 296255 transitions. Word has length 44 [2021-02-19 17:23:11,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:11,872 INFO L480 AbstractCegarLoop]: Abstraction has 127775 states and 296255 transitions. [2021-02-19 17:23:11,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:11,873 INFO L276 IsEmpty]: Start isEmpty. Operand 127775 states and 296255 transitions. [2021-02-19 17:23:11,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 17:23:11,922 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:11,922 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:12,122 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2021-02-19 17:23:12,123 INFO L428 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:12,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:12,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1965485504, now seen corresponding path program 188 times [2021-02-19 17:23:12,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:12,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170973263] [2021-02-19 17:23:12,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:12,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:12,429 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:12,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170973263] [2021-02-19 17:23:12,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847734100] [2021-02-19 17:23:12,429 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:12,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:23:12,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:12,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 17:23:12,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:13,086 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:23:13,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:13,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-02-19 17:23:13,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217288791] [2021-02-19 17:23:13,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 17:23:13,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:13,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 17:23:13,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=855, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:23:13,087 INFO L87 Difference]: Start difference. First operand 127775 states and 296255 transitions. Second operand has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 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) [2021-02-19 17:23:15,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:15,596 INFO L93 Difference]: Finished difference Result 135363 states and 313182 transitions. [2021-02-19 17:23:15,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-02-19 17:23:15,598 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 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 44 [2021-02-19 17:23:15,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:15,764 INFO L225 Difference]: With dead ends: 135363 [2021-02-19 17:23:15,764 INFO L226 Difference]: Without dead ends: 135320 [2021-02-19 17:23:15,764 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=174, Invalid=2082, Unknown=0, NotChecked=0, Total=2256 [2021-02-19 17:23:15,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135320 states. [2021-02-19 17:23:17,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135320 to 127786. [2021-02-19 17:23:17,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127786 states, 127785 states have (on average 2.3186211214148766) internal successors, (296285), 127785 states have internal predecessors, (296285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:17,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127786 states to 127786 states and 296285 transitions. [2021-02-19 17:23:17,496 INFO L78 Accepts]: Start accepts. Automaton has 127786 states and 296285 transitions. Word has length 44 [2021-02-19 17:23:17,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:17,496 INFO L480 AbstractCegarLoop]: Abstraction has 127786 states and 296285 transitions. [2021-02-19 17:23:17,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 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) [2021-02-19 17:23:17,496 INFO L276 IsEmpty]: Start isEmpty. Operand 127786 states and 296285 transitions. [2021-02-19 17:23:17,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 17:23:17,553 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:17,553 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:17,753 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-02-19 17:23:17,753 INFO L428 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:17,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:17,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1125314418, now seen corresponding path program 189 times [2021-02-19 17:23:17,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:17,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053853087] [2021-02-19 17:23:17,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:17,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:18,484 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:18,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053853087] [2021-02-19 17:23:18,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173523642] [2021-02-19 17:23:18,484 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:18,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 17:23:18,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:18,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 17:23:18,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:19,061 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:19,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:19,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-02-19 17:23:19,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992192178] [2021-02-19 17:23:19,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 17:23:19,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:19,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 17:23:19,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:23:19,062 INFO L87 Difference]: Start difference. First operand 127786 states and 296285 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:20,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:20,938 INFO L93 Difference]: Finished difference Result 128874 states and 298650 transitions. [2021-02-19 17:23:20,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-02-19 17:23:20,939 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-02-19 17:23:20,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:21,123 INFO L225 Difference]: With dead ends: 128874 [2021-02-19 17:23:21,123 INFO L226 Difference]: Without dead ends: 128840 [2021-02-19 17:23:21,123 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=133, Invalid=1507, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 17:23:21,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128840 states. [2021-02-19 17:23:22,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128840 to 128388. [2021-02-19 17:23:22,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128388 states, 128387 states have (on average 2.3188562704946762) internal successors, (297711), 128387 states have internal predecessors, (297711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:23,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128388 states to 128388 states and 297711 transitions. [2021-02-19 17:23:23,179 INFO L78 Accepts]: Start accepts. Automaton has 128388 states and 297711 transitions. Word has length 44 [2021-02-19 17:23:23,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:23,180 INFO L480 AbstractCegarLoop]: Abstraction has 128388 states and 297711 transitions. [2021-02-19 17:23:23,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:23,180 INFO L276 IsEmpty]: Start isEmpty. Operand 128388 states and 297711 transitions. [2021-02-19 17:23:23,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 17:23:23,239 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:23,239 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:23,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:23,440 INFO L428 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:23,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:23,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1166031274, now seen corresponding path program 190 times [2021-02-19 17:23:23,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:23,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611375201] [2021-02-19 17:23:23,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:23,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:23,833 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:23,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611375201] [2021-02-19 17:23:23,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400718899] [2021-02-19 17:23:23,834 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:23,852 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:23:23,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:23,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 17:23:23,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:24,434 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:24,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:24,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 28 [2021-02-19 17:23:24,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638858623] [2021-02-19 17:23:24,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-02-19 17:23:24,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:24,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-02-19 17:23:24,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=742, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:23:24,435 INFO L87 Difference]: Start difference. First operand 128388 states and 297711 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 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) [2021-02-19 17:23:26,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:26,502 INFO L93 Difference]: Finished difference Result 128806 states and 298588 transitions. [2021-02-19 17:23:26,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 17:23:26,503 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 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 44 [2021-02-19 17:23:26,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:26,670 INFO L225 Difference]: With dead ends: 128806 [2021-02-19 17:23:26,670 INFO L226 Difference]: Without dead ends: 128772 [2021-02-19 17:23:26,670 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=139, Invalid=1501, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 17:23:26,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128772 states. [2021-02-19 17:23:28,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128772 to 128723. [2021-02-19 17:23:28,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128723 states, 128722 states have (on average 2.318407109895744) internal successors, (298430), 128722 states have internal predecessors, (298430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:29,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128723 states to 128723 states and 298430 transitions. [2021-02-19 17:23:29,156 INFO L78 Accepts]: Start accepts. Automaton has 128723 states and 298430 transitions. Word has length 44 [2021-02-19 17:23:29,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:29,156 INFO L480 AbstractCegarLoop]: Abstraction has 128723 states and 298430 transitions. [2021-02-19 17:23:29,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 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) [2021-02-19 17:23:29,156 INFO L276 IsEmpty]: Start isEmpty. Operand 128723 states and 298430 transitions. [2021-02-19 17:23:29,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 17:23:29,230 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:29,230 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:29,447 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-02-19 17:23:29,447 INFO L428 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:29,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:29,448 INFO L82 PathProgramCache]: Analyzing trace with hash -763550322, now seen corresponding path program 191 times [2021-02-19 17:23:29,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:29,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414554448] [2021-02-19 17:23:29,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:29,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:29,854 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:29,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414554448] [2021-02-19 17:23:29,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154832389] [2021-02-19 17:23:29,854 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:23:29,880 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-02-19 17:23:29,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:29,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 17:23:29,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:30,679 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:30,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:30,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-02-19 17:23:30,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979189604] [2021-02-19 17:23:30,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 17:23:30,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:30,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 17:23:30,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=797, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:23:30,680 INFO L87 Difference]: Start difference. First operand 128723 states and 298430 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:32,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:32,968 INFO L93 Difference]: Finished difference Result 131900 states and 305203 transitions. [2021-02-19 17:23:32,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-02-19 17:23:32,970 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-02-19 17:23:32,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:33,150 INFO L225 Difference]: With dead ends: 131900 [2021-02-19 17:23:33,150 INFO L226 Difference]: Without dead ends: 131866 [2021-02-19 17:23:33,151 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=165, Invalid=1905, Unknown=0, NotChecked=0, Total=2070 [2021-02-19 17:23:33,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131866 states. [2021-02-19 17:23:34,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131866 to 129310. [2021-02-19 17:23:34,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129310 states, 129309 states have (on average 2.3184310450162013) internal successors, (299794), 129309 states have internal predecessors, (299794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:35,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129310 states to 129310 states and 299794 transitions. [2021-02-19 17:23:35,034 INFO L78 Accepts]: Start accepts. Automaton has 129310 states and 299794 transitions. Word has length 44 [2021-02-19 17:23:35,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:35,034 INFO L480 AbstractCegarLoop]: Abstraction has 129310 states and 299794 transitions. [2021-02-19 17:23:35,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:35,035 INFO L276 IsEmpty]: Start isEmpty. Operand 129310 states and 299794 transitions. [2021-02-19 17:23:35,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 17:23:35,093 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:35,093 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:35,293 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-02-19 17:23:35,293 INFO L428 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:35,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:35,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1584067772, now seen corresponding path program 192 times [2021-02-19 17:23:35,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:35,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142195988] [2021-02-19 17:23:35,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:35,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:35,634 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:35,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142195988] [2021-02-19 17:23:35,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364239242] [2021-02-19 17:23:35,634 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:35,653 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-02-19 17:23:35,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:35,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 17:23:35,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:36,307 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:23:36,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:36,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-02-19 17:23:36,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276030297] [2021-02-19 17:23:36,308 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 17:23:36,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:36,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 17:23:36,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=854, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:23:36,308 INFO L87 Difference]: Start difference. First operand 129310 states and 299794 transitions. Second operand has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 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) [2021-02-19 17:23:38,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:38,860 INFO L93 Difference]: Finished difference Result 138710 states and 320991 transitions. [2021-02-19 17:23:38,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 17:23:38,861 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 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 44 [2021-02-19 17:23:38,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:39,054 INFO L225 Difference]: With dead ends: 138710 [2021-02-19 17:23:39,055 INFO L226 Difference]: Without dead ends: 138667 [2021-02-19 17:23:39,055 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=156, Invalid=1824, Unknown=0, NotChecked=0, Total=1980 [2021-02-19 17:23:39,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138667 states. [2021-02-19 17:23:40,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138667 to 135897. [2021-02-19 17:23:41,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135897 states, 135896 states have (on average 2.319663566256549) internal successors, (315233), 135896 states have internal predecessors, (315233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:41,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135897 states to 135897 states and 315233 transitions. [2021-02-19 17:23:41,286 INFO L78 Accepts]: Start accepts. Automaton has 135897 states and 315233 transitions. Word has length 44 [2021-02-19 17:23:41,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:41,287 INFO L480 AbstractCegarLoop]: Abstraction has 135897 states and 315233 transitions. [2021-02-19 17:23:41,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 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) [2021-02-19 17:23:41,287 INFO L276 IsEmpty]: Start isEmpty. Operand 135897 states and 315233 transitions. [2021-02-19 17:23:41,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 17:23:41,347 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:41,347 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:41,547 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2021-02-19 17:23:41,547 INFO L428 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:41,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:41,548 INFO L82 PathProgramCache]: Analyzing trace with hash -803926002, now seen corresponding path program 193 times [2021-02-19 17:23:41,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:41,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225306228] [2021-02-19 17:23:41,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:41,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:41,865 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:41,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225306228] [2021-02-19 17:23:41,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156697936] [2021-02-19 17:23:41,865 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:41,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:41,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 17:23:41,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:42,430 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:42,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:42,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-02-19 17:23:42,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687535488] [2021-02-19 17:23:42,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 17:23:42,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:42,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 17:23:42,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:23:42,430 INFO L87 Difference]: Start difference. First operand 135897 states and 315233 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:44,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:44,947 INFO L93 Difference]: Finished difference Result 136993 states and 317620 transitions. [2021-02-19 17:23:44,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-02-19 17:23:44,949 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-02-19 17:23:44,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:45,139 INFO L225 Difference]: With dead ends: 136993 [2021-02-19 17:23:45,139 INFO L226 Difference]: Without dead ends: 136959 [2021-02-19 17:23:45,139 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=133, Invalid=1507, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 17:23:45,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136959 states. [2021-02-19 17:23:47,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136959 to 136501. [2021-02-19 17:23:47,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136501 states, 136500 states have (on average 2.319919413919414) internal successors, (316669), 136500 states have internal predecessors, (316669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:47,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136501 states to 136501 states and 316669 transitions. [2021-02-19 17:23:47,490 INFO L78 Accepts]: Start accepts. Automaton has 136501 states and 316669 transitions. Word has length 44 [2021-02-19 17:23:47,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:47,490 INFO L480 AbstractCegarLoop]: Abstraction has 136501 states and 316669 transitions. [2021-02-19 17:23:47,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:47,490 INFO L276 IsEmpty]: Start isEmpty. Operand 136501 states and 316669 transitions. [2021-02-19 17:23:47,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 17:23:47,550 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:47,550 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:47,750 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:47,750 INFO L428 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:47,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:47,750 INFO L82 PathProgramCache]: Analyzing trace with hash -844642858, now seen corresponding path program 194 times [2021-02-19 17:23:47,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:47,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571595941] [2021-02-19 17:23:47,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:47,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:48,073 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:48,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571595941] [2021-02-19 17:23:48,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979996011] [2021-02-19 17:23:48,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:48,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:23:48,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:48,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 17:23:48,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:48,682 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:48,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:48,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 28 [2021-02-19 17:23:48,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828274941] [2021-02-19 17:23:48,682 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-02-19 17:23:48,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:48,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-02-19 17:23:48,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=742, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:23:48,683 INFO L87 Difference]: Start difference. First operand 136501 states and 316669 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 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) [2021-02-19 17:23:50,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:50,926 INFO L93 Difference]: Finished difference Result 136923 states and 317558 transitions. [2021-02-19 17:23:50,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 17:23:50,927 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 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 44 [2021-02-19 17:23:50,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:51,121 INFO L225 Difference]: With dead ends: 136923 [2021-02-19 17:23:51,121 INFO L226 Difference]: Without dead ends: 136889 [2021-02-19 17:23:51,121 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=139, Invalid=1501, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 17:23:51,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136889 states. [2021-02-19 17:23:52,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136889 to 136832. [2021-02-19 17:23:52,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136832 states, 136831 states have (on average 2.3195620875386425) internal successors, (317388), 136831 states have internal predecessors, (317388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:53,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136832 states to 136832 states and 317388 transitions. [2021-02-19 17:23:53,485 INFO L78 Accepts]: Start accepts. Automaton has 136832 states and 317388 transitions. Word has length 44 [2021-02-19 17:23:53,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:53,485 INFO L480 AbstractCegarLoop]: Abstraction has 136832 states and 317388 transitions. [2021-02-19 17:23:53,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 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) [2021-02-19 17:23:53,486 INFO L276 IsEmpty]: Start isEmpty. Operand 136832 states and 317388 transitions. [2021-02-19 17:23:53,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 17:23:53,577 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:53,577 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:53,794 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-02-19 17:23:53,794 INFO L428 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:53,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:53,794 INFO L82 PathProgramCache]: Analyzing trace with hash -442161906, now seen corresponding path program 195 times [2021-02-19 17:23:53,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:53,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443928098] [2021-02-19 17:23:53,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:53,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:54,119 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:54,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443928098] [2021-02-19 17:23:54,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4388194] [2021-02-19 17:23:54,119 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:54,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-02-19 17:23:54,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:54,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 17:23:54,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:54,823 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:54,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:54,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-02-19 17:23:54,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785600292] [2021-02-19 17:23:54,823 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 17:23:54,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:54,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 17:23:54,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=860, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:23:54,824 INFO L87 Difference]: Start difference. First operand 136832 states and 317388 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:58,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:58,422 INFO L93 Difference]: Finished difference Result 141699 states and 328059 transitions. [2021-02-19 17:23:58,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-02-19 17:23:58,423 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-02-19 17:23:58,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:58,617 INFO L225 Difference]: With dead ends: 141699 [2021-02-19 17:23:58,617 INFO L226 Difference]: Without dead ends: 141665 [2021-02-19 17:23:58,617 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=187, Invalid=2363, Unknown=0, NotChecked=0, Total=2550 [2021-02-19 17:23:58,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141665 states. [2021-02-19 17:24:00,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141665 to 138137. [2021-02-19 17:24:00,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138137 states, 138136 states have (on average 2.3198876469566225) internal successors, (320460), 138136 states have internal predecessors, (320460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-02-19 17:24:01,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:01,064 WARN L545 AbstractCegarLoop]: Verification canceled [2021-02-19 17:24:01,068 WARN L224 ceAbstractionStarter]: Timeout [2021-02-19 17:24:01,068 INFO L202 PluginConnector]: Adding new model clever.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.02 05:24:01 BasicIcfg [2021-02-19 17:24:01,068 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-19 17:24:01,068 INFO L168 Benchmark]: Toolchain (without parser) took 501838.66 ms. Allocated memory was 335.5 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 316.4 MB in the beginning and 12.5 GB in the end (delta: -12.2 GB). Peak memory consumption was 4.2 GB. Max. memory is 16.0 GB. [2021-02-19 17:24:01,069 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.15 ms. Allocated memory is still 335.5 MB. Free memory was 317.5 MB in the beginning and 317.4 MB in the end (delta: 76.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 17:24:01,069 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.00 ms. Allocated memory is still 335.5 MB. Free memory was 315.9 MB in the beginning and 314.4 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 17:24:01,069 INFO L168 Benchmark]: Boogie Preprocessor took 15.61 ms. Allocated memory is still 335.5 MB. Free memory was 314.4 MB in the beginning and 313.4 MB in the end (delta: 961.1 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. [2021-02-19 17:24:01,069 INFO L168 Benchmark]: RCFGBuilder took 246.74 ms. Allocated memory is still 335.5 MB. Free memory was 313.4 MB in the beginning and 302.7 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-02-19 17:24:01,069 INFO L168 Benchmark]: TraceAbstraction took 501197.50 ms. Allocated memory was 335.5 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 302.3 MB in the beginning and 12.5 GB in the end (delta: -12.2 GB). Peak memory consumption was 4.2 GB. Max. memory is 16.0 GB. [2021-02-19 17:24:01,069 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 0.15 ms. Allocated memory is still 335.5 MB. Free memory was 317.5 MB in the beginning and 317.4 MB in the end (delta: 76.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 22.00 ms. Allocated memory is still 335.5 MB. Free memory was 315.9 MB in the beginning and 314.4 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 15.61 ms. Allocated memory is still 335.5 MB. Free memory was 314.4 MB in the beginning and 313.4 MB in the end (delta: 961.1 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. * RCFGBuilder took 246.74 ms. Allocated memory is still 335.5 MB. Free memory was 313.4 MB in the beginning and 302.7 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 501197.50 ms. Allocated memory was 335.5 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 302.3 MB in the beginning and 12.5 GB in the end (delta: -12.2 GB). Peak memory consumption was 4.2 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 48]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 48). Cancelled while ReachableStatesComputation was computing reachable states (100242 states constructedinput type DoubleDeckerAutomaton). - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 501.0s, OverallIterations: 207, TraceHistogramMax: 6, AutomataDifference: 213.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 17094 SDtfs, 34689 SDslu, 234810 SDs, 0 SdLazy, 181447 SolverSat, 4179 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 69.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12286 GetRequests, 5732 SyntacticMatches, 443 SemanticMatches, 6111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39256 ImplicationChecksByTransitivity, 136.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=136832occurred in iteration=206, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 137.2s AutomataMinimizationTime, 207 MinimizatonAttempts, 262798 StatesRemovedByMinimization, 206 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.6s SsaConstructionTime, 2.0s SatisfiabilityAnalysisTime, 97.3s InterpolantComputationTime, 15454 NumberOfCodeBlocks, 15434 NumberOfCodeBlocksAsserted, 897 NumberOfCheckSat, 15043 ConstructedInterpolants, 0 QuantifiedInterpolants, 7223010 SizeOfPredicates, 892 NumberOfNonLiveVariables, 14358 ConjunctsInSsa, 4287 ConjunctsInUnsatCore, 411 InterpolantComputations, 3 PerfectInterpolantSequences, 1602/16643 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