/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/difference-det.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 19:56:48,115 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 19:56:48,117 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 19:56:48,155 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 19:56:48,209 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-13 19:56:48,228 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 19:56:48,228 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 19:56:48,229 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 19:56:48,229 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 19:56:48,230 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 19:56:48,230 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 19:56:48,230 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 19:56:48,230 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 19:56:48,230 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 19:56:48,230 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 19:56:48,230 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 19:56:48,231 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 19:56:48,231 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 19:56:48,231 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 19:56:48,231 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 19:56:48,231 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 19:56:48,231 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 19:56:48,231 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 19:56:48,231 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 19:56:48,246 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 19:56:48,246 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 19:56:48,246 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 19:56:48,247 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 19:56:48,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 19:56:48,247 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 19:56:48,247 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 19:56:48,248 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 19:56:48,248 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 19:56:48,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 19:56:48,248 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 19:56:48,248 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 19:56:48,249 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 19:56:48,551 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 19:56:48,586 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 19:56:48,589 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 19:56:48,590 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 19:56:48,592 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 19:56:48,593 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/difference-det.wvr.bpl [2021-07-13 19:56:48,593 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/difference-det.wvr.bpl' [2021-07-13 19:56:48,634 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 19:56:48,635 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 19:56:48,641 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 19:56:48,641 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 19:56:48,641 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 19:56:48,651 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:56:48" (1/1) ... [2021-07-13 19:56:48,656 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:56:48" (1/1) ... [2021-07-13 19:56:48,662 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 19:56:48,664 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 19:56:48,664 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 19:56:48,664 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 19:56:48,670 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:56:48" (1/1) ... [2021-07-13 19:56:48,670 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:56:48" (1/1) ... [2021-07-13 19:56:48,671 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:56:48" (1/1) ... [2021-07-13 19:56:48,671 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:56:48" (1/1) ... [2021-07-13 19:56:48,673 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:56:48" (1/1) ... [2021-07-13 19:56:48,676 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:56:48" (1/1) ... [2021-07-13 19:56:48,677 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:56:48" (1/1) ... [2021-07-13 19:56:48,678 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 19:56:48,678 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 19:56:48,679 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 19:56:48,679 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 19:56:48,680 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:56:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 19:56:48,736 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 19:56:48,736 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 19:56:48,736 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 19:56:48,736 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 19:56:48,736 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 19:56:48,737 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 19:56:48,737 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 19:56:48,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 19:56:48,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 19:56:48,737 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-13 19:56:48,737 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-13 19:56:48,737 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-13 19:56:48,737 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-07-13 19:56:48,737 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-07-13 19:56:48,738 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-07-13 19:56:48,738 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 19:56:48,976 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 19:56:48,977 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-13 19:56:48,978 INFO L202 PluginConnector]: Adding new model difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 07:56:48 BoogieIcfgContainer [2021-07-13 19:56:48,978 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 19:56:48,980 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 19:56:48,980 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 19:56:48,982 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 19:56:48,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:56:48" (1/2) ... [2021-07-13 19:56:48,983 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a24a85c and model type difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 07:56:48, skipping insertion in model container [2021-07-13 19:56:48,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 07:56:48" (2/2) ... [2021-07-13 19:56:48,984 INFO L111 eAbstractionObserver]: Analyzing ICFG difference-det.wvr.bpl [2021-07-13 19:56:48,989 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 19:56:48,989 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 19:56:48,989 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 19:56:48,989 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 19:56:49,071 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-07-13 19:56:49,106 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-07-13 19:56:49,139 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 19:56:49,140 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 19:56:49,140 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 19:56:49,140 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 19:56:49,140 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 19:56:49,140 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 19:56:49,140 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 19:56:49,140 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 19:56:49,154 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 49 places, 40 transitions, 112 flow [2021-07-13 19:56:49,232 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 436 states, 435 states have (on average 3.8160919540229883) internal successors, (1660), 435 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:49,234 INFO L276 IsEmpty]: Start isEmpty. Operand has 436 states, 435 states have (on average 3.8160919540229883) internal successors, (1660), 435 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:49,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:56:49,256 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:49,257 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:49,257 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:49,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:49,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1286358700, now seen corresponding path program 1 times [2021-07-13 19:56:49,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:49,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055344249] [2021-07-13 19:56:49,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:49,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:49,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:49,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:49,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055344249] [2021-07-13 19:56:49,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055344249] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:56:49,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:56:49,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 19:56:49,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580397694] [2021-07-13 19:56:49,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:56:49,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:49,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:56:49,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:56:49,492 INFO L87 Difference]: Start difference. First operand has 436 states, 435 states have (on average 3.8160919540229883) internal successors, (1660), 435 states have internal predecessors, (1660), 0 states have call successors, (0), 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 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:49,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:49,566 INFO L93 Difference]: Finished difference Result 1268 states and 4623 transitions. [2021-07-13 19:56:49,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 19:56:49,568 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 [2021-07-13 19:56:49,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:49,593 INFO L225 Difference]: With dead ends: 1268 [2021-07-13 19:56:49,593 INFO L226 Difference]: Without dead ends: 1057 [2021-07-13 19:56:49,594 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:56:49,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2021-07-13 19:56:49,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 776. [2021-07-13 19:56:49,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 775 states have (on average 3.7716129032258063) internal successors, (2923), 775 states have internal predecessors, (2923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:49,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 2923 transitions. [2021-07-13 19:56:49,692 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 2923 transitions. Word has length 26 [2021-07-13 19:56:49,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:49,693 INFO L482 AbstractCegarLoop]: Abstraction has 776 states and 2923 transitions. [2021-07-13 19:56:49,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:49,694 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 2923 transitions. [2021-07-13 19:56:49,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:56:49,697 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:49,697 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:49,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 19:56:49,698 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:49,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:49,699 INFO L82 PathProgramCache]: Analyzing trace with hash -642766254, now seen corresponding path program 1 times [2021-07-13 19:56:49,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:49,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071495351] [2021-07-13 19:56:49,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:49,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:49,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:49,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:49,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071495351] [2021-07-13 19:56:49,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071495351] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:49,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720026064] [2021-07-13 19:56:49,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:49,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:49,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 19:56:49,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:50,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:50,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720026064] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:50,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:50,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-07-13 19:56:50,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116638407] [2021-07-13 19:56:50,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:56:50,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:50,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:56:50,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:56:50,104 INFO L87 Difference]: Start difference. First operand 776 states and 2923 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:50,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:50,243 INFO L93 Difference]: Finished difference Result 1233 states and 4561 transitions. [2021-07-13 19:56:50,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:56:50,243 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 19:56:50,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:50,254 INFO L225 Difference]: With dead ends: 1233 [2021-07-13 19:56:50,254 INFO L226 Difference]: Without dead ends: 1233 [2021-07-13 19:56:50,255 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 125.7ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:56:50,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2021-07-13 19:56:50,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 868. [2021-07-13 19:56:50,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 3.795847750865052) internal successors, (3291), 867 states have internal predecessors, (3291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:50,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 3291 transitions. [2021-07-13 19:56:50,298 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 3291 transitions. Word has length 28 [2021-07-13 19:56:50,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:50,299 INFO L482 AbstractCegarLoop]: Abstraction has 868 states and 3291 transitions. [2021-07-13 19:56:50,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:50,299 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 3291 transitions. [2021-07-13 19:56:50,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:56:50,302 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:50,303 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:50,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-07-13 19:56:50,517 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:50,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:50,518 INFO L82 PathProgramCache]: Analyzing trace with hash -965486860, now seen corresponding path program 1 times [2021-07-13 19:56:50,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:50,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725387874] [2021-07-13 19:56:50,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:50,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:50,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:50,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:50,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725387874] [2021-07-13 19:56:50,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725387874] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:56:50,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:56:50,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 19:56:50,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496036223] [2021-07-13 19:56:50,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:56:50,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:50,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:56:50,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:56:50,587 INFO L87 Difference]: Start difference. First operand 868 states and 3291 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:50,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:50,674 INFO L93 Difference]: Finished difference Result 1101 states and 3979 transitions. [2021-07-13 19:56:50,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:56:50,675 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 19:56:50,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:50,682 INFO L225 Difference]: With dead ends: 1101 [2021-07-13 19:56:50,683 INFO L226 Difference]: Without dead ends: 1047 [2021-07-13 19:56:50,683 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 47.5ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:56:50,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2021-07-13 19:56:50,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 912. [2021-07-13 19:56:50,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 911 states have (on average 3.773874862788145) internal successors, (3438), 911 states have internal predecessors, (3438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:50,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 3438 transitions. [2021-07-13 19:56:50,717 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 3438 transitions. Word has length 28 [2021-07-13 19:56:50,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:50,717 INFO L482 AbstractCegarLoop]: Abstraction has 912 states and 3438 transitions. [2021-07-13 19:56:50,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:50,718 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 3438 transitions. [2021-07-13 19:56:50,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:56:50,721 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:50,721 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:50,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-13 19:56:50,721 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:50,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:50,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1366009100, now seen corresponding path program 2 times [2021-07-13 19:56:50,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:50,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145425287] [2021-07-13 19:56:50,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:50,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:50,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:50,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:50,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145425287] [2021-07-13 19:56:50,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145425287] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:56:50,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:56:50,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 19:56:50,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17241428] [2021-07-13 19:56:50,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:56:50,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:50,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:56:50,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:56:50,768 INFO L87 Difference]: Start difference. First operand 912 states and 3438 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:50,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:50,822 INFO L93 Difference]: Finished difference Result 834 states and 3134 transitions. [2021-07-13 19:56:50,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 19:56:50,822 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 19:56:50,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:50,828 INFO L225 Difference]: With dead ends: 834 [2021-07-13 19:56:50,828 INFO L226 Difference]: Without dead ends: 834 [2021-07-13 19:56:50,829 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 37.0ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:56:50,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2021-07-13 19:56:50,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 774. [2021-07-13 19:56:50,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 3.8007761966364813) internal successors, (2938), 773 states have internal predecessors, (2938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:50,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 2938 transitions. [2021-07-13 19:56:50,855 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 2938 transitions. Word has length 28 [2021-07-13 19:56:50,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:50,856 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 2938 transitions. [2021-07-13 19:56:50,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:50,856 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 2938 transitions. [2021-07-13 19:56:50,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:56:50,858 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:50,858 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:50,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-13 19:56:50,859 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:50,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:50,859 INFO L82 PathProgramCache]: Analyzing trace with hash -718106448, now seen corresponding path program 2 times [2021-07-13 19:56:50,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:50,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780534347] [2021-07-13 19:56:50,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:50,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:50,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:50,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:50,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780534347] [2021-07-13 19:56:50,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780534347] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:56:50,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:56:50,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 19:56:50,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521478329] [2021-07-13 19:56:50,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:56:50,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:50,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:56:50,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:56:50,929 INFO L87 Difference]: Start difference. First operand 774 states and 2938 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:50,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:50,999 INFO L93 Difference]: Finished difference Result 878 states and 3300 transitions. [2021-07-13 19:56:50,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:56:51,000 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 19:56:51,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:51,006 INFO L225 Difference]: With dead ends: 878 [2021-07-13 19:56:51,006 INFO L226 Difference]: Without dead ends: 838 [2021-07-13 19:56:51,006 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 45.2ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:56:51,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2021-07-13 19:56:51,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 726. [2021-07-13 19:56:51,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 725 states have (on average 3.8096551724137933) internal successors, (2762), 725 states have internal predecessors, (2762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:51,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 2762 transitions. [2021-07-13 19:56:51,036 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 2762 transitions. Word has length 28 [2021-07-13 19:56:51,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:51,036 INFO L482 AbstractCegarLoop]: Abstraction has 726 states and 2762 transitions. [2021-07-13 19:56:51,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:51,036 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 2762 transitions. [2021-07-13 19:56:51,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:56:51,042 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:51,042 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:51,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-13 19:56:51,042 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:51,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:51,043 INFO L82 PathProgramCache]: Analyzing trace with hash -948436878, now seen corresponding path program 1 times [2021-07-13 19:56:51,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:51,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219900969] [2021-07-13 19:56:51,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:51,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:51,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:51,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:51,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219900969] [2021-07-13 19:56:51,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219900969] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:51,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321984418] [2021-07-13 19:56:51,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:51,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:51,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:56:51,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:51,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:51,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321984418] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:51,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:51,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2021-07-13 19:56:51,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530503773] [2021-07-13 19:56:51,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:56:51,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:51,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:56:51,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:56:51,338 INFO L87 Difference]: Start difference. First operand 726 states and 2762 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:51,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:51,442 INFO L93 Difference]: Finished difference Result 3314 states and 12458 transitions. [2021-07-13 19:56:51,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:56:51,443 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:56:51,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:51,466 INFO L225 Difference]: With dead ends: 3314 [2021-07-13 19:56:51,466 INFO L226 Difference]: Without dead ends: 3000 [2021-07-13 19:56:51,466 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 56.1ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:56:51,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3000 states. [2021-07-13 19:56:51,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3000 to 2163. [2021-07-13 19:56:51,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2163 states, 2162 states have (on average 4.01063829787234) internal successors, (8671), 2162 states have internal predecessors, (8671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:51,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2163 states to 2163 states and 8671 transitions. [2021-07-13 19:56:51,573 INFO L78 Accepts]: Start accepts. Automaton has 2163 states and 8671 transitions. Word has length 30 [2021-07-13 19:56:51,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:51,574 INFO L482 AbstractCegarLoop]: Abstraction has 2163 states and 8671 transitions. [2021-07-13 19:56:51,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:51,574 INFO L276 IsEmpty]: Start isEmpty. Operand 2163 states and 8671 transitions. [2021-07-13 19:56:51,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:56:51,581 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:51,582 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:51,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:51,782 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:51,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:51,783 INFO L82 PathProgramCache]: Analyzing trace with hash -390423246, now seen corresponding path program 2 times [2021-07-13 19:56:51,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:51,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645626065] [2021-07-13 19:56:51,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:51,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:51,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:56:51,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:51,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645626065] [2021-07-13 19:56:51,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645626065] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:56:51,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:56:51,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 19:56:51,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300991828] [2021-07-13 19:56:51,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:56:51,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:51,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:56:51,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:56:51,836 INFO L87 Difference]: Start difference. First operand 2163 states and 8671 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 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) [2021-07-13 19:56:51,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:51,917 INFO L93 Difference]: Finished difference Result 3426 states and 13470 transitions. [2021-07-13 19:56:51,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:56:51,917 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:56:51,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:51,941 INFO L225 Difference]: With dead ends: 3426 [2021-07-13 19:56:51,941 INFO L226 Difference]: Without dead ends: 3395 [2021-07-13 19:56:51,941 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 36.1ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:56:51,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3395 states. [2021-07-13 19:56:52,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3395 to 2948. [2021-07-13 19:56:52,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2948 states, 2947 states have (on average 4.058025110281642) internal successors, (11959), 2947 states have internal predecessors, (11959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:52,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2948 states to 2948 states and 11959 transitions. [2021-07-13 19:56:52,079 INFO L78 Accepts]: Start accepts. Automaton has 2948 states and 11959 transitions. Word has length 30 [2021-07-13 19:56:52,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:52,079 INFO L482 AbstractCegarLoop]: Abstraction has 2948 states and 11959 transitions. [2021-07-13 19:56:52,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 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) [2021-07-13 19:56:52,080 INFO L276 IsEmpty]: Start isEmpty. Operand 2948 states and 11959 transitions. [2021-07-13 19:56:52,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 19:56:52,090 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:52,090 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:52,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-13 19:56:52,090 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:52,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:52,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1743273360, now seen corresponding path program 3 times [2021-07-13 19:56:52,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:52,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952642569] [2021-07-13 19:56:52,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:52,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:52,186 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:52,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:52,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952642569] [2021-07-13 19:56:52,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952642569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:52,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485381215] [2021-07-13 19:56:52,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:52,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:56:52,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:52,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:56:52,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:52,354 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:52,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485381215] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:52,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:52,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-07-13 19:56:52,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280142394] [2021-07-13 19:56:52,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:56:52,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:52,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:56:52,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:56:52,356 INFO L87 Difference]: Start difference. First operand 2948 states and 11959 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:52,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:52,789 INFO L93 Difference]: Finished difference Result 10235 states and 40121 transitions. [2021-07-13 19:56:52,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:56:52,789 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-13 19:56:52,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:52,861 INFO L225 Difference]: With dead ends: 10235 [2021-07-13 19:56:52,861 INFO L226 Difference]: Without dead ends: 10235 [2021-07-13 19:56:52,861 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 278.8ms TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:56:52,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10235 states. [2021-07-13 19:56:53,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10235 to 4372. [2021-07-13 19:56:53,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4372 states, 4371 states have (on average 4.153511782200869) internal successors, (18155), 4371 states have internal predecessors, (18155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:53,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4372 states to 4372 states and 18155 transitions. [2021-07-13 19:56:53,105 INFO L78 Accepts]: Start accepts. Automaton has 4372 states and 18155 transitions. Word has length 32 [2021-07-13 19:56:53,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:53,108 INFO L482 AbstractCegarLoop]: Abstraction has 4372 states and 18155 transitions. [2021-07-13 19:56:53,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:53,108 INFO L276 IsEmpty]: Start isEmpty. Operand 4372 states and 18155 transitions. [2021-07-13 19:56:53,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 19:56:53,129 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:53,129 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:53,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:53,345 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:53,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:53,345 INFO L82 PathProgramCache]: Analyzing trace with hash 218451410, now seen corresponding path program 1 times [2021-07-13 19:56:53,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:53,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238418145] [2021-07-13 19:56:53,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:53,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:53,397 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:56:53,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:53,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238418145] [2021-07-13 19:56:53,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238418145] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:53,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766056041] [2021-07-13 19:56:53,397 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 [2021-07-13 19:56:53,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:53,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 19:56:53,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:53,591 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:56:53,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766056041] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:53,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:53,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-07-13 19:56:53,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372889083] [2021-07-13 19:56:53,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:56:53,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:53,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:56:53,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:56:53,593 INFO L87 Difference]: Start difference. First operand 4372 states and 18155 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 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) [2021-07-13 19:56:53,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:53,786 INFO L93 Difference]: Finished difference Result 8631 states and 35204 transitions. [2021-07-13 19:56:53,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:56:53,787 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 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 32 [2021-07-13 19:56:53,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:53,834 INFO L225 Difference]: With dead ends: 8631 [2021-07-13 19:56:53,834 INFO L226 Difference]: Without dead ends: 8631 [2021-07-13 19:56:53,834 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 105.8ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:56:53,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8631 states. [2021-07-13 19:56:54,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8631 to 5549. [2021-07-13 19:56:54,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5549 states, 5548 states have (on average 4.195385724585436) internal successors, (23276), 5548 states have internal predecessors, (23276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:54,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5549 states to 5549 states and 23276 transitions. [2021-07-13 19:56:54,065 INFO L78 Accepts]: Start accepts. Automaton has 5549 states and 23276 transitions. Word has length 32 [2021-07-13 19:56:54,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:54,065 INFO L482 AbstractCegarLoop]: Abstraction has 5549 states and 23276 transitions. [2021-07-13 19:56:54,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 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) [2021-07-13 19:56:54,066 INFO L276 IsEmpty]: Start isEmpty. Operand 5549 states and 23276 transitions. [2021-07-13 19:56:54,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 19:56:54,081 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:54,081 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:54,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:54,306 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:54,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:54,306 INFO L82 PathProgramCache]: Analyzing trace with hash 54399028, now seen corresponding path program 4 times [2021-07-13 19:56:54,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:54,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561583512] [2021-07-13 19:56:54,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:54,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:54,360 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:54,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:54,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561583512] [2021-07-13 19:56:54,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561583512] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:54,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370039490] [2021-07-13 19:56:54,361 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:54,396 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:56:54,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:54,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:56:54,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:54,538 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:54,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370039490] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:54,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:54,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-13 19:56:54,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150643179] [2021-07-13 19:56:54,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:56:54,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:54,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:56:54,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:56:54,540 INFO L87 Difference]: Start difference. First operand 5549 states and 23276 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 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) [2021-07-13 19:56:55,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:55,026 INFO L93 Difference]: Finished difference Result 15361 states and 62588 transitions. [2021-07-13 19:56:55,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:56:55,027 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 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 32 [2021-07-13 19:56:55,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:55,098 INFO L225 Difference]: With dead ends: 15361 [2021-07-13 19:56:55,098 INFO L226 Difference]: Without dead ends: 15091 [2021-07-13 19:56:55,098 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 349.4ms TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:56:55,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15091 states. [2021-07-13 19:56:55,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15091 to 8451. [2021-07-13 19:56:55,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8451 states, 8450 states have (on average 4.295739644970414) internal successors, (36299), 8450 states have internal predecessors, (36299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:55,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8451 states to 8451 states and 36299 transitions. [2021-07-13 19:56:55,488 INFO L78 Accepts]: Start accepts. Automaton has 8451 states and 36299 transitions. Word has length 32 [2021-07-13 19:56:55,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:55,489 INFO L482 AbstractCegarLoop]: Abstraction has 8451 states and 36299 transitions. [2021-07-13 19:56:55,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 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) [2021-07-13 19:56:55,489 INFO L276 IsEmpty]: Start isEmpty. Operand 8451 states and 36299 transitions. [2021-07-13 19:56:55,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 19:56:55,514 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:55,514 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:55,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-07-13 19:56:55,729 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:55,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:55,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1842610448, now seen corresponding path program 1 times [2021-07-13 19:56:55,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:55,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012602347] [2021-07-13 19:56:55,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:55,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:55,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:56:55,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:55,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012602347] [2021-07-13 19:56:55,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012602347] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:56:55,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:56:55,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-13 19:56:55,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874880195] [2021-07-13 19:56:55,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:56:55,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:55,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:56:55,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:56:55,777 INFO L87 Difference]: Start difference. First operand 8451 states and 36299 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:55,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:55,894 INFO L93 Difference]: Finished difference Result 11634 states and 49174 transitions. [2021-07-13 19:56:55,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:56:55,895 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-13 19:56:55,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:55,945 INFO L225 Difference]: With dead ends: 11634 [2021-07-13 19:56:55,945 INFO L226 Difference]: Without dead ends: 11496 [2021-07-13 19:56:55,946 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 33.7ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:56:55,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11496 states. [2021-07-13 19:56:56,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11496 to 9206. [2021-07-13 19:56:56,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9206 states, 9205 states have (on average 4.329277566539924) internal successors, (39851), 9205 states have internal predecessors, (39851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:56,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9206 states to 9206 states and 39851 transitions. [2021-07-13 19:56:56,458 INFO L78 Accepts]: Start accepts. Automaton has 9206 states and 39851 transitions. Word has length 32 [2021-07-13 19:56:56,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:56,458 INFO L482 AbstractCegarLoop]: Abstraction has 9206 states and 39851 transitions. [2021-07-13 19:56:56,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:56,458 INFO L276 IsEmpty]: Start isEmpty. Operand 9206 states and 39851 transitions. [2021-07-13 19:56:56,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 19:56:56,486 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:56,486 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:56,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-07-13 19:56:56,487 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:56,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:56,487 INFO L82 PathProgramCache]: Analyzing trace with hash -530233040, now seen corresponding path program 2 times [2021-07-13 19:56:56,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:56,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103924661] [2021-07-13 19:56:56,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:56,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:56,528 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:56:56,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:56,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103924661] [2021-07-13 19:56:56,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103924661] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:56:56,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:56:56,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-13 19:56:56,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926601452] [2021-07-13 19:56:56,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:56:56,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:56,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:56:56,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:56:56,530 INFO L87 Difference]: Start difference. First operand 9206 states and 39851 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:56,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:56,693 INFO L93 Difference]: Finished difference Result 10977 states and 46247 transitions. [2021-07-13 19:56:56,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 19:56:56,694 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-13 19:56:56,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:56,734 INFO L225 Difference]: With dead ends: 10977 [2021-07-13 19:56:56,734 INFO L226 Difference]: Without dead ends: 10950 [2021-07-13 19:56:56,734 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 39.9ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:56:56,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10950 states. [2021-07-13 19:56:57,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10950 to 9177. [2021-07-13 19:56:57,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9177 states, 9176 states have (on average 4.283129904097646) internal successors, (39302), 9176 states have internal predecessors, (39302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:57,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9177 states to 9177 states and 39302 transitions. [2021-07-13 19:56:57,081 INFO L78 Accepts]: Start accepts. Automaton has 9177 states and 39302 transitions. Word has length 32 [2021-07-13 19:56:57,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:57,082 INFO L482 AbstractCegarLoop]: Abstraction has 9177 states and 39302 transitions. [2021-07-13 19:56:57,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:57,082 INFO L276 IsEmpty]: Start isEmpty. Operand 9177 states and 39302 transitions. [2021-07-13 19:56:57,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 19:56:57,107 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:57,107 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:57,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-07-13 19:56:57,107 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:57,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:57,108 INFO L82 PathProgramCache]: Analyzing trace with hash -175459084, now seen corresponding path program 2 times [2021-07-13 19:56:57,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:57,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966987494] [2021-07-13 19:56:57,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:57,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:57,146 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:56:57,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:57,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966987494] [2021-07-13 19:56:57,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966987494] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:56:57,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:56:57,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-13 19:56:57,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57952801] [2021-07-13 19:56:57,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:56:57,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:57,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:56:57,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:56:57,148 INFO L87 Difference]: Start difference. First operand 9177 states and 39302 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:57,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:57,274 INFO L93 Difference]: Finished difference Result 11062 states and 46211 transitions. [2021-07-13 19:56:57,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:56:57,275 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-13 19:56:57,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:57,471 INFO L225 Difference]: With dead ends: 11062 [2021-07-13 19:56:57,471 INFO L226 Difference]: Without dead ends: 11002 [2021-07-13 19:56:57,471 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 39.6ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:56:57,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11002 states. [2021-07-13 19:56:57,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11002 to 9261. [2021-07-13 19:56:57,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9261 states, 9260 states have (on average 4.27645788336933) internal successors, (39600), 9260 states have internal predecessors, (39600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:57,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9261 states to 9261 states and 39600 transitions. [2021-07-13 19:56:57,880 INFO L78 Accepts]: Start accepts. Automaton has 9261 states and 39600 transitions. Word has length 32 [2021-07-13 19:56:57,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:57,880 INFO L482 AbstractCegarLoop]: Abstraction has 9261 states and 39600 transitions. [2021-07-13 19:56:57,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:57,881 INFO L276 IsEmpty]: Start isEmpty. Operand 9261 states and 39600 transitions. [2021-07-13 19:56:57,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 19:56:57,906 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:57,906 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:57,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-07-13 19:56:57,906 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:57,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:57,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1035058804, now seen corresponding path program 5 times [2021-07-13 19:56:57,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:57,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522491325] [2021-07-13 19:56:57,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:57,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:57,949 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:57,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:57,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522491325] [2021-07-13 19:56:57,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522491325] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:57,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494020512] [2021-07-13 19:56:57,950 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:57,987 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:56:57,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:57,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:56:57,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:58,114 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:58,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494020512] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:58,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:58,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-07-13 19:56:58,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669348566] [2021-07-13 19:56:58,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:56:58,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:58,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:56:58,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:56:58,117 INFO L87 Difference]: Start difference. First operand 9261 states and 39600 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:58,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:58,545 INFO L93 Difference]: Finished difference Result 17289 states and 70842 transitions. [2021-07-13 19:56:58,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:56:58,546 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-13 19:56:58,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:58,597 INFO L225 Difference]: With dead ends: 17289 [2021-07-13 19:56:58,597 INFO L226 Difference]: Without dead ends: 17289 [2021-07-13 19:56:58,598 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 247.6ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:56:58,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17289 states. [2021-07-13 19:56:58,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17289 to 10772. [2021-07-13 19:56:58,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10772 states, 10771 states have (on average 4.3019218271284005) internal successors, (46336), 10771 states have internal predecessors, (46336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:58,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10772 states to 10772 states and 46336 transitions. [2021-07-13 19:56:58,986 INFO L78 Accepts]: Start accepts. Automaton has 10772 states and 46336 transitions. Word has length 32 [2021-07-13 19:56:58,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:58,986 INFO L482 AbstractCegarLoop]: Abstraction has 10772 states and 46336 transitions. [2021-07-13 19:56:58,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:58,986 INFO L276 IsEmpty]: Start isEmpty. Operand 10772 states and 46336 transitions. [2021-07-13 19:56:59,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 19:56:59,143 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:59,143 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:59,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:59,353 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:59,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:59,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1682961456, now seen corresponding path program 6 times [2021-07-13 19:56:59,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:59,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048536378] [2021-07-13 19:56:59,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:59,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:59,393 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:59,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:59,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048536378] [2021-07-13 19:56:59,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048536378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:59,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774160161] [2021-07-13 19:56:59,394 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:59,435 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:56:59,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:59,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:56:59,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:59,573 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:59,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774160161] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:59,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:59,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-07-13 19:56:59,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642976780] [2021-07-13 19:56:59,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:56:59,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:59,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:56:59,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:56:59,575 INFO L87 Difference]: Start difference. First operand 10772 states and 46336 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:00,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:00,026 INFO L93 Difference]: Finished difference Result 17283 states and 70897 transitions. [2021-07-13 19:57:00,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:57:00,027 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-13 19:57:00,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:00,078 INFO L225 Difference]: With dead ends: 17283 [2021-07-13 19:57:00,078 INFO L226 Difference]: Without dead ends: 17145 [2021-07-13 19:57:00,078 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 252.6ms TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:57:00,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17145 states. [2021-07-13 19:57:00,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17145 to 10795. [2021-07-13 19:57:00,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10795 states, 10794 states have (on average 4.285158421345192) internal successors, (46254), 10794 states have internal predecessors, (46254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:00,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10795 states to 10795 states and 46254 transitions. [2021-07-13 19:57:00,442 INFO L78 Accepts]: Start accepts. Automaton has 10795 states and 46254 transitions. Word has length 32 [2021-07-13 19:57:00,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:00,442 INFO L482 AbstractCegarLoop]: Abstraction has 10795 states and 46254 transitions. [2021-07-13 19:57:00,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:00,443 INFO L276 IsEmpty]: Start isEmpty. Operand 10795 states and 46254 transitions. [2021-07-13 19:57:00,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 19:57:00,462 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:00,462 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:00,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-13 19:57:00,663 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:00,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:00,664 INFO L82 PathProgramCache]: Analyzing trace with hash -915931212, now seen corresponding path program 7 times [2021-07-13 19:57:00,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:00,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524375509] [2021-07-13 19:57:00,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:00,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:00,728 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:57:00,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:00,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524375509] [2021-07-13 19:57:00,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524375509] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:00,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228253529] [2021-07-13 19:57:00,729 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:00,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:00,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:57:00,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:00,895 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:00,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228253529] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:00,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:00,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-13 19:57:00,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127917554] [2021-07-13 19:57:00,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:57:00,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:00,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:57:00,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:57:00,898 INFO L87 Difference]: Start difference. First operand 10795 states and 46254 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 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) [2021-07-13 19:57:01,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:01,477 INFO L93 Difference]: Finished difference Result 26096 states and 108482 transitions. [2021-07-13 19:57:01,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:57:01,477 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 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 [2021-07-13 19:57:01,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:01,602 INFO L225 Difference]: With dead ends: 26096 [2021-07-13 19:57:01,602 INFO L226 Difference]: Without dead ends: 26096 [2021-07-13 19:57:01,602 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 268.9ms TimeCoverageRelationStatistics Valid=218, Invalid=484, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:57:01,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26096 states. [2021-07-13 19:57:02,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26096 to 14993. [2021-07-13 19:57:02,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14993 states, 14992 states have (on average 4.368729989327641) internal successors, (65496), 14992 states have internal predecessors, (65496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:02,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14993 states to 14993 states and 65496 transitions. [2021-07-13 19:57:02,242 INFO L78 Accepts]: Start accepts. Automaton has 14993 states and 65496 transitions. Word has length 32 [2021-07-13 19:57:02,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:02,242 INFO L482 AbstractCegarLoop]: Abstraction has 14993 states and 65496 transitions. [2021-07-13 19:57:02,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 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) [2021-07-13 19:57:02,242 INFO L276 IsEmpty]: Start isEmpty. Operand 14993 states and 65496 transitions. [2021-07-13 19:57:02,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 19:57:02,400 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:02,400 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:02,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-07-13 19:57:02,617 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:02,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:02,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1035025234, now seen corresponding path program 8 times [2021-07-13 19:57:02,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:02,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599959945] [2021-07-13 19:57:02,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:02,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:02,676 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:57:02,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:02,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599959945] [2021-07-13 19:57:02,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599959945] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:02,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765369779] [2021-07-13 19:57:02,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:02,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:57:02,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:02,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:57:02,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:02,854 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:02,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765369779] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:02,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:02,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-07-13 19:57:02,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102303030] [2021-07-13 19:57:02,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:57:02,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:02,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:57:02,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:57:02,856 INFO L87 Difference]: Start difference. First operand 14993 states and 65496 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 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) [2021-07-13 19:57:03,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:03,305 INFO L93 Difference]: Finished difference Result 19071 states and 81167 transitions. [2021-07-13 19:57:03,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:57:03,306 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 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 [2021-07-13 19:57:03,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:03,381 INFO L225 Difference]: With dead ends: 19071 [2021-07-13 19:57:03,381 INFO L226 Difference]: Without dead ends: 19009 [2021-07-13 19:57:03,382 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 224.7ms TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:57:03,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19009 states. [2021-07-13 19:57:03,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19009 to 15495. [2021-07-13 19:57:03,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15495 states, 15494 states have (on average 4.3805344004130635) internal successors, (67872), 15494 states have internal predecessors, (67872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:03,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15495 states to 15495 states and 67872 transitions. [2021-07-13 19:57:03,858 INFO L78 Accepts]: Start accepts. Automaton has 15495 states and 67872 transitions. Word has length 32 [2021-07-13 19:57:03,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:03,858 INFO L482 AbstractCegarLoop]: Abstraction has 15495 states and 67872 transitions. [2021-07-13 19:57:03,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 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) [2021-07-13 19:57:03,859 INFO L276 IsEmpty]: Start isEmpty. Operand 15495 states and 67872 transitions. [2021-07-13 19:57:03,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 19:57:03,892 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:03,892 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:04,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-13 19:57:04,099 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:04,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:04,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1628603050, now seen corresponding path program 9 times [2021-07-13 19:57:04,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:04,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091488486] [2021-07-13 19:57:04,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:04,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:04,145 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:57:04,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:04,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091488486] [2021-07-13 19:57:04,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091488486] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:04,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253420811] [2021-07-13 19:57:04,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:04,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:57:04,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:04,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:57:04,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:04,292 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:04,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253420811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:04,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:04,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-07-13 19:57:04,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514470303] [2021-07-13 19:57:04,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:57:04,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:04,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:57:04,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:57:04,293 INFO L87 Difference]: Start difference. First operand 15495 states and 67872 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:04,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:04,836 INFO L93 Difference]: Finished difference Result 25596 states and 106759 transitions. [2021-07-13 19:57:04,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:57:04,837 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-13 19:57:04,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:04,939 INFO L225 Difference]: With dead ends: 25596 [2021-07-13 19:57:04,939 INFO L226 Difference]: Without dead ends: 25518 [2021-07-13 19:57:04,939 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 217.9ms TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:57:04,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25518 states. [2021-07-13 19:57:05,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25518 to 15518. [2021-07-13 19:57:05,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15518 states, 15517 states have (on average 4.374299155764645) internal successors, (67876), 15517 states have internal predecessors, (67876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:05,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15518 states to 15518 states and 67876 transitions. [2021-07-13 19:57:05,504 INFO L78 Accepts]: Start accepts. Automaton has 15518 states and 67876 transitions. Word has length 32 [2021-07-13 19:57:05,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:05,504 INFO L482 AbstractCegarLoop]: Abstraction has 15518 states and 67876 transitions. [2021-07-13 19:57:05,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:05,504 INFO L276 IsEmpty]: Start isEmpty. Operand 15518 states and 67876 transitions. [2021-07-13 19:57:05,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 19:57:05,542 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:05,542 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:05,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-13 19:57:05,757 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:05,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:05,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1459493096, now seen corresponding path program 10 times [2021-07-13 19:57:05,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:05,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489008447] [2021-07-13 19:57:05,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:05,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:05,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:05,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:05,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489008447] [2021-07-13 19:57:05,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489008447] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:05,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204811471] [2021-07-13 19:57:05,818 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:05,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:57:05,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:05,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:57:05,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:05,965 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:05,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204811471] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:05,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:05,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-13 19:57:05,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295967026] [2021-07-13 19:57:05,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:57:05,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:05,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:57:05,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:57:05,970 INFO L87 Difference]: Start difference. First operand 15518 states and 67876 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:06,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:06,596 INFO L93 Difference]: Finished difference Result 25214 states and 104840 transitions. [2021-07-13 19:57:06,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:57:06,597 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-13 19:57:06,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:06,685 INFO L225 Difference]: With dead ends: 25214 [2021-07-13 19:57:06,685 INFO L226 Difference]: Without dead ends: 25094 [2021-07-13 19:57:06,686 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 300.7ms TimeCoverageRelationStatistics Valid=236, Invalid=576, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:57:06,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25094 states. [2021-07-13 19:57:07,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25094 to 16132. [2021-07-13 19:57:07,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16132 states, 16131 states have (on average 4.372140598846941) internal successors, (70527), 16131 states have internal predecessors, (70527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:07,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16132 states to 16132 states and 70527 transitions. [2021-07-13 19:57:07,373 INFO L78 Accepts]: Start accepts. Automaton has 16132 states and 70527 transitions. Word has length 32 [2021-07-13 19:57:07,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:07,374 INFO L482 AbstractCegarLoop]: Abstraction has 16132 states and 70527 transitions. [2021-07-13 19:57:07,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:07,374 INFO L276 IsEmpty]: Start isEmpty. Operand 16132 states and 70527 transitions. [2021-07-13 19:57:07,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 19:57:07,409 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:07,409 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:07,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:07,610 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:07,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:07,611 INFO L82 PathProgramCache]: Analyzing trace with hash 720718514, now seen corresponding path program 11 times [2021-07-13 19:57:07,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:07,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854922235] [2021-07-13 19:57:07,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:07,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:07,675 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:07,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:07,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854922235] [2021-07-13 19:57:07,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854922235] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:07,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371482451] [2021-07-13 19:57:07,676 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:07,721 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:57:07,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:07,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:57:07,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:07,867 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:07,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371482451] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:07,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:07,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2021-07-13 19:57:07,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396818127] [2021-07-13 19:57:07,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:57:07,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:07,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:57:07,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:57:07,868 INFO L87 Difference]: Start difference. First operand 16132 states and 70527 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 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) [2021-07-13 19:57:08,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:08,229 INFO L93 Difference]: Finished difference Result 30028 states and 127196 transitions. [2021-07-13 19:57:08,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:57:08,230 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 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 34 [2021-07-13 19:57:08,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:08,513 INFO L225 Difference]: With dead ends: 30028 [2021-07-13 19:57:08,513 INFO L226 Difference]: Without dead ends: 29440 [2021-07-13 19:57:08,514 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 90.6ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:57:08,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29440 states. [2021-07-13 19:57:09,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29440 to 21834. [2021-07-13 19:57:09,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21834 states, 21833 states have (on average 4.3858379517244535) internal successors, (95756), 21833 states have internal predecessors, (95756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:09,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21834 states to 21834 states and 95756 transitions. [2021-07-13 19:57:09,141 INFO L78 Accepts]: Start accepts. Automaton has 21834 states and 95756 transitions. Word has length 34 [2021-07-13 19:57:09,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:09,141 INFO L482 AbstractCegarLoop]: Abstraction has 21834 states and 95756 transitions. [2021-07-13 19:57:09,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 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) [2021-07-13 19:57:09,141 INFO L276 IsEmpty]: Start isEmpty. Operand 21834 states and 95756 transitions. [2021-07-13 19:57:09,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 19:57:09,185 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:09,186 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:09,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:09,389 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:09,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:09,389 INFO L82 PathProgramCache]: Analyzing trace with hash -554854418, now seen corresponding path program 12 times [2021-07-13 19:57:09,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:09,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390973434] [2021-07-13 19:57:09,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:09,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:09,456 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:57:09,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:09,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390973434] [2021-07-13 19:57:09,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390973434] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:09,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324941054] [2021-07-13 19:57:09,456 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:09,504 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:57:09,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:09,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:57:09,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:09,636 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:09,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324941054] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:09,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:09,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2021-07-13 19:57:09,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546571391] [2021-07-13 19:57:09,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:57:09,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:09,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:57:09,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:57:09,638 INFO L87 Difference]: Start difference. First operand 21834 states and 95756 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 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) [2021-07-13 19:57:10,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:10,570 INFO L93 Difference]: Finished difference Result 60940 states and 262767 transitions. [2021-07-13 19:57:10,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:57:10,573 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 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 34 [2021-07-13 19:57:10,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:10,884 INFO L225 Difference]: With dead ends: 60940 [2021-07-13 19:57:10,884 INFO L226 Difference]: Without dead ends: 58958 [2021-07-13 19:57:10,884 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 89.7ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:57:10,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58958 states. [2021-07-13 19:57:12,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58958 to 39850. [2021-07-13 19:57:12,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39850 states, 39849 states have (on average 4.48199452934829) internal successors, (178603), 39849 states have internal predecessors, (178603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:12,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39850 states to 39850 states and 178603 transitions. [2021-07-13 19:57:12,625 INFO L78 Accepts]: Start accepts. Automaton has 39850 states and 178603 transitions. Word has length 34 [2021-07-13 19:57:12,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:12,625 INFO L482 AbstractCegarLoop]: Abstraction has 39850 states and 178603 transitions. [2021-07-13 19:57:12,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 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) [2021-07-13 19:57:12,625 INFO L276 IsEmpty]: Start isEmpty. Operand 39850 states and 178603 transitions. [2021-07-13 19:57:12,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 19:57:12,719 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:12,720 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:12,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-07-13 19:57:12,922 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:12,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:12,923 INFO L82 PathProgramCache]: Analyzing trace with hash -403396494, now seen corresponding path program 13 times [2021-07-13 19:57:12,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:12,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973080671] [2021-07-13 19:57:12,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:12,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:12,976 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:57:12,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:12,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973080671] [2021-07-13 19:57:12,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973080671] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:12,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660343578] [2021-07-13 19:57:12,977 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:13,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:13,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:57:13,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:13,140 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:13,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660343578] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:13,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:13,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2021-07-13 19:57:13,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796466833] [2021-07-13 19:57:13,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:57:13,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:13,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:57:13,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:57:13,142 INFO L87 Difference]: Start difference. First operand 39850 states and 178603 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 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) [2021-07-13 19:57:13,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:13,958 INFO L93 Difference]: Finished difference Result 60941 states and 268418 transitions. [2021-07-13 19:57:13,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:57:13,958 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 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 34 [2021-07-13 19:57:13,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:14,452 INFO L225 Difference]: With dead ends: 60941 [2021-07-13 19:57:14,452 INFO L226 Difference]: Without dead ends: 60279 [2021-07-13 19:57:14,452 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 74.2ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:57:14,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60279 states. [2021-07-13 19:57:15,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60279 to 54948. [2021-07-13 19:57:16,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54948 states, 54947 states have (on average 4.507143247129052) internal successors, (247654), 54947 states have internal predecessors, (247654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:16,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54948 states to 54948 states and 247654 transitions. [2021-07-13 19:57:16,398 INFO L78 Accepts]: Start accepts. Automaton has 54948 states and 247654 transitions. Word has length 34 [2021-07-13 19:57:16,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:16,399 INFO L482 AbstractCegarLoop]: Abstraction has 54948 states and 247654 transitions. [2021-07-13 19:57:16,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 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) [2021-07-13 19:57:16,399 INFO L276 IsEmpty]: Start isEmpty. Operand 54948 states and 247654 transitions. [2021-07-13 19:57:16,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:57:16,538 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:16,538 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:16,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:16,739 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:16,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:16,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1103617456, now seen corresponding path program 14 times [2021-07-13 19:57:16,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:16,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717058966] [2021-07-13 19:57:16,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:16,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:16,809 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:16,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:16,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717058966] [2021-07-13 19:57:16,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717058966] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:16,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611895794] [2021-07-13 19:57:16,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:16,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:57:16,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:16,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:57:16,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:17,224 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-07-13 19:57:17,275 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:17,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611895794] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:17,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:17,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-07-13 19:57:17,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311138748] [2021-07-13 19:57:17,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:57:17,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:17,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:57:17,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:57:17,276 INFO L87 Difference]: Start difference. First operand 54948 states and 247654 transitions. Second operand has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:18,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:18,755 INFO L93 Difference]: Finished difference Result 115835 states and 498368 transitions. [2021-07-13 19:57:18,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:57:18,755 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:57:18,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:19,676 INFO L225 Difference]: With dead ends: 115835 [2021-07-13 19:57:19,676 INFO L226 Difference]: Without dead ends: 115835 [2021-07-13 19:57:19,677 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 428.3ms TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:57:19,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115835 states. [2021-07-13 19:57:22,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115835 to 56994. [2021-07-13 19:57:22,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56994 states, 56993 states have (on average 4.487621286824698) internal successors, (255763), 56993 states have internal predecessors, (255763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:22,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56994 states to 56994 states and 255763 transitions. [2021-07-13 19:57:22,781 INFO L78 Accepts]: Start accepts. Automaton has 56994 states and 255763 transitions. Word has length 36 [2021-07-13 19:57:22,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:22,781 INFO L482 AbstractCegarLoop]: Abstraction has 56994 states and 255763 transitions. [2021-07-13 19:57:22,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:22,781 INFO L276 IsEmpty]: Start isEmpty. Operand 56994 states and 255763 transitions. [2021-07-13 19:57:22,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:57:22,925 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:22,925 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:23,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-13 19:57:23,129 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:23,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:23,129 INFO L82 PathProgramCache]: Analyzing trace with hash 2089929332, now seen corresponding path program 15 times [2021-07-13 19:57:23,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:23,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644571121] [2021-07-13 19:57:23,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:23,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:23,188 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:23,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:23,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644571121] [2021-07-13 19:57:23,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644571121] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:23,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159218991] [2021-07-13 19:57:23,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:23,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:57:23,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:23,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:57:23,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:23,370 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:23,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159218991] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:23,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:23,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:57:23,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480609445] [2021-07-13 19:57:23,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:57:23,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:23,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:57:23,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:57:23,372 INFO L87 Difference]: Start difference. First operand 56994 states and 255763 transitions. Second operand has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 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) [2021-07-13 19:57:25,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:25,796 INFO L93 Difference]: Finished difference Result 148781 states and 646238 transitions. [2021-07-13 19:57:25,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 19:57:25,797 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 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 36 [2021-07-13 19:57:25,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:26,625 INFO L225 Difference]: With dead ends: 148781 [2021-07-13 19:57:26,625 INFO L226 Difference]: Without dead ends: 147463 [2021-07-13 19:57:26,626 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 845.5ms TimeCoverageRelationStatistics Valid=449, Invalid=1357, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:57:27,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147463 states. [2021-07-13 19:57:30,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147463 to 80557. [2021-07-13 19:57:30,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80557 states, 80556 states have (on average 4.52723571180297) internal successors, (364696), 80556 states have internal predecessors, (364696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:31,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80557 states to 80557 states and 364696 transitions. [2021-07-13 19:57:31,270 INFO L78 Accepts]: Start accepts. Automaton has 80557 states and 364696 transitions. Word has length 36 [2021-07-13 19:57:31,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:31,270 INFO L482 AbstractCegarLoop]: Abstraction has 80557 states and 364696 transitions. [2021-07-13 19:57:31,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 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) [2021-07-13 19:57:31,270 INFO L276 IsEmpty]: Start isEmpty. Operand 80557 states and 364696 transitions. [2021-07-13 19:57:31,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:57:31,901 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:31,901 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:32,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:32,102 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:32,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:32,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1053355276, now seen corresponding path program 16 times [2021-07-13 19:57:32,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:32,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965998287] [2021-07-13 19:57:32,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:32,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:32,159 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:32,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:32,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965998287] [2021-07-13 19:57:32,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965998287] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:32,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943843524] [2021-07-13 19:57:32,160 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:32,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:57:32,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:32,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:57:32,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:32,349 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:32,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943843524] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:32,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:32,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-07-13 19:57:32,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632319925] [2021-07-13 19:57:32,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:57:32,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:32,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:57:32,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:57:32,351 INFO L87 Difference]: Start difference. First operand 80557 states and 364696 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 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) [2021-07-13 19:57:34,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:34,561 INFO L93 Difference]: Finished difference Result 170107 states and 749961 transitions. [2021-07-13 19:57:34,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:57:34,561 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 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 36 [2021-07-13 19:57:34,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:35,990 INFO L225 Difference]: With dead ends: 170107 [2021-07-13 19:57:35,991 INFO L226 Difference]: Without dead ends: 170087 [2021-07-13 19:57:35,991 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 446.5ms TimeCoverageRelationStatistics Valid=387, Invalid=945, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:57:36,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170087 states. [2021-07-13 19:57:40,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170087 to 102149. [2021-07-13 19:57:41,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102149 states, 102148 states have (on average 4.5491933273289735) internal successors, (464691), 102148 states have internal predecessors, (464691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:42,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102149 states to 102149 states and 464691 transitions. [2021-07-13 19:57:42,393 INFO L78 Accepts]: Start accepts. Automaton has 102149 states and 464691 transitions. Word has length 36 [2021-07-13 19:57:42,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:42,393 INFO L482 AbstractCegarLoop]: Abstraction has 102149 states and 464691 transitions. [2021-07-13 19:57:42,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 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) [2021-07-13 19:57:42,393 INFO L276 IsEmpty]: Start isEmpty. Operand 102149 states and 464691 transitions. [2021-07-13 19:57:42,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:57:42,857 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:42,857 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:43,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-07-13 19:57:43,080 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:43,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:43,080 INFO L82 PathProgramCache]: Analyzing trace with hash -405452624, now seen corresponding path program 17 times [2021-07-13 19:57:43,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:43,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417668313] [2021-07-13 19:57:43,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:43,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:43,160 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:43,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:43,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417668313] [2021-07-13 19:57:43,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417668313] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:43,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822392576] [2021-07-13 19:57:43,161 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:43,199 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:57:43,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:43,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:57:43,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:43,376 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:43,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822392576] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:43,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:43,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-07-13 19:57:43,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069574473] [2021-07-13 19:57:43,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:57:43,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:43,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:57:43,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:57:43,378 INFO L87 Difference]: Start difference. First operand 102149 states and 464691 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 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) [2021-07-13 19:57:45,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:45,796 INFO L93 Difference]: Finished difference Result 140554 states and 618093 transitions. [2021-07-13 19:57:45,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:57:45,797 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 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 36 [2021-07-13 19:57:45,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:47,512 INFO L225 Difference]: With dead ends: 140554 [2021-07-13 19:57:47,512 INFO L226 Difference]: Without dead ends: 140250 [2021-07-13 19:57:47,512 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 486.8ms TimeCoverageRelationStatistics Valid=356, Invalid=976, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:57:47,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140250 states. [2021-07-13 19:57:51,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140250 to 98725. [2021-07-13 19:57:51,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98725 states, 98724 states have (on average 4.555366476236781) internal successors, (449724), 98724 states have internal predecessors, (449724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:52,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98725 states to 98725 states and 449724 transitions. [2021-07-13 19:57:52,182 INFO L78 Accepts]: Start accepts. Automaton has 98725 states and 449724 transitions. Word has length 36 [2021-07-13 19:57:52,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:52,182 INFO L482 AbstractCegarLoop]: Abstraction has 98725 states and 449724 transitions. [2021-07-13 19:57:52,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 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) [2021-07-13 19:57:52,182 INFO L276 IsEmpty]: Start isEmpty. Operand 98725 states and 449724 transitions. [2021-07-13 19:57:52,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:57:52,835 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:52,835 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:53,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-07-13 19:57:53,058 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:53,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:53,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1930458894, now seen corresponding path program 18 times [2021-07-13 19:57:53,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:53,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904470972] [2021-07-13 19:57:53,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:53,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:53,102 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:57:53,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:53,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904470972] [2021-07-13 19:57:53,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904470972] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:53,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380817684] [2021-07-13 19:57:53,102 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:53,150 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:57:53,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:53,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:57:53,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:53,281 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:53,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380817684] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:53,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:53,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-07-13 19:57:53,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719214134] [2021-07-13 19:57:53,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:57:53,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:53,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:57:53,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:57:53,282 INFO L87 Difference]: Start difference. First operand 98725 states and 449724 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:55,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:55,431 INFO L93 Difference]: Finished difference Result 157433 states and 697584 transitions. [2021-07-13 19:57:55,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:57:55,432 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:57:55,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:56,762 INFO L225 Difference]: With dead ends: 157433 [2021-07-13 19:57:56,762 INFO L226 Difference]: Without dead ends: 156538 [2021-07-13 19:57:56,763 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 313.9ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:57:56,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156538 states. [2021-07-13 19:58:01,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156538 to 110101. [2021-07-13 19:58:01,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110101 states, 110100 states have (on average 4.5832970027247955) internal successors, (504621), 110100 states have internal predecessors, (504621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:02,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110101 states to 110101 states and 504621 transitions. [2021-07-13 19:58:02,744 INFO L78 Accepts]: Start accepts. Automaton has 110101 states and 504621 transitions. Word has length 36 [2021-07-13 19:58:02,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:02,745 INFO L482 AbstractCegarLoop]: Abstraction has 110101 states and 504621 transitions. [2021-07-13 19:58:02,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:02,745 INFO L276 IsEmpty]: Start isEmpty. Operand 110101 states and 504621 transitions. [2021-07-13 19:58:03,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:58:03,026 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:03,026 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:03,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-13 19:58:03,229 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:03,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:03,229 INFO L82 PathProgramCache]: Analyzing trace with hash -564059436, now seen corresponding path program 19 times [2021-07-13 19:58:03,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:03,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827626021] [2021-07-13 19:58:03,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:03,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:03,286 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:03,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:03,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827626021] [2021-07-13 19:58:03,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827626021] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:03,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528439425] [2021-07-13 19:58:03,286 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:03,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:03,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:58:03,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:03,492 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:03,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528439425] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:03,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:03,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-07-13 19:58:03,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48912829] [2021-07-13 19:58:03,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:58:03,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:03,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:58:03,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:58:03,493 INFO L87 Difference]: Start difference. First operand 110101 states and 504621 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 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) [2021-07-13 19:58:06,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:06,365 INFO L93 Difference]: Finished difference Result 192417 states and 850027 transitions. [2021-07-13 19:58:06,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:58:06,366 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 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 36 [2021-07-13 19:58:06,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:08,067 INFO L225 Difference]: With dead ends: 192417 [2021-07-13 19:58:08,067 INFO L226 Difference]: Without dead ends: 191725 [2021-07-13 19:58:08,068 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 468.5ms TimeCoverageRelationStatistics Valid=421, Invalid=1219, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:58:08,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191725 states. [2021-07-13 19:58:13,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191725 to 118442. [2021-07-13 19:58:13,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118442 states, 118441 states have (on average 4.604208002296502) internal successors, (545327), 118441 states have internal predecessors, (545327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:15,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118442 states to 118442 states and 545327 transitions. [2021-07-13 19:58:15,331 INFO L78 Accepts]: Start accepts. Automaton has 118442 states and 545327 transitions. Word has length 36 [2021-07-13 19:58:15,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:15,331 INFO L482 AbstractCegarLoop]: Abstraction has 118442 states and 545327 transitions. [2021-07-13 19:58:15,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 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) [2021-07-13 19:58:15,331 INFO L276 IsEmpty]: Start isEmpty. Operand 118442 states and 545327 transitions. [2021-07-13 19:58:15,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:58:15,678 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:15,678 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:16,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-07-13 19:58:16,208 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:16,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:16,209 INFO L82 PathProgramCache]: Analyzing trace with hash -689678634, now seen corresponding path program 20 times [2021-07-13 19:58:16,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:16,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326984223] [2021-07-13 19:58:16,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:16,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:16,313 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:58:16,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:16,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326984223] [2021-07-13 19:58:16,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326984223] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:16,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198713898] [2021-07-13 19:58:16,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:16,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:58:16,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:16,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:58:16,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:16,526 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:16,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198713898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:16,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:16,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:58:16,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163025433] [2021-07-13 19:58:16,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:58:16,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:16,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:58:16,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:58:16,528 INFO L87 Difference]: Start difference. First operand 118442 states and 545327 transitions. Second operand has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 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) [2021-07-13 19:58:20,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:20,204 INFO L93 Difference]: Finished difference Result 221192 states and 968042 transitions. [2021-07-13 19:58:20,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:58:20,204 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 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 36 [2021-07-13 19:58:20,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:22,500 INFO L225 Difference]: With dead ends: 221192 [2021-07-13 19:58:22,501 INFO L226 Difference]: Without dead ends: 221192 [2021-07-13 19:58:22,501 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 497.6ms TimeCoverageRelationStatistics Valid=414, Invalid=1068, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:58:22,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221192 states. [2021-07-13 19:58:28,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221192 to 115584. [2021-07-13 19:58:29,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115584 states, 115583 states have (on average 4.562331830805569) internal successors, (527328), 115583 states have internal predecessors, (527328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:30,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115584 states to 115584 states and 527328 transitions. [2021-07-13 19:58:30,370 INFO L78 Accepts]: Start accepts. Automaton has 115584 states and 527328 transitions. Word has length 36 [2021-07-13 19:58:30,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:30,370 INFO L482 AbstractCegarLoop]: Abstraction has 115584 states and 527328 transitions. [2021-07-13 19:58:30,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 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) [2021-07-13 19:58:30,370 INFO L276 IsEmpty]: Start isEmpty. Operand 115584 states and 527328 transitions. [2021-07-13 19:58:30,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:58:30,667 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:30,667 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:30,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-13 19:58:30,868 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:30,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:30,868 INFO L82 PathProgramCache]: Analyzing trace with hash -26712938, now seen corresponding path program 21 times [2021-07-13 19:58:30,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:30,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652988425] [2021-07-13 19:58:30,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:30,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:30,916 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:58:30,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:30,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652988425] [2021-07-13 19:58:30,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652988425] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:30,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122191322] [2021-07-13 19:58:30,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:30,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:58:30,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:30,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:58:30,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:31,093 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:31,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122191322] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:31,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:31,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-07-13 19:58:31,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5575684] [2021-07-13 19:58:31,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:58:31,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:31,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:58:31,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:58:31,096 INFO L87 Difference]: Start difference. First operand 115584 states and 527328 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:33,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:33,134 INFO L93 Difference]: Finished difference Result 149434 states and 659887 transitions. [2021-07-13 19:58:33,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:58:33,135 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:58:33,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:34,464 INFO L225 Difference]: With dead ends: 149434 [2021-07-13 19:58:34,465 INFO L226 Difference]: Without dead ends: 149030 [2021-07-13 19:58:34,465 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 400.5ms TimeCoverageRelationStatistics Valid=318, Invalid=1014, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:58:34,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149030 states. [2021-07-13 19:58:38,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149030 to 114434. [2021-07-13 19:58:38,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114434 states, 114433 states have (on average 4.564548687878497) internal successors, (522335), 114433 states have internal predecessors, (522335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:39,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114434 states to 114434 states and 522335 transitions. [2021-07-13 19:58:39,976 INFO L78 Accepts]: Start accepts. Automaton has 114434 states and 522335 transitions. Word has length 36 [2021-07-13 19:58:39,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:39,976 INFO L482 AbstractCegarLoop]: Abstraction has 114434 states and 522335 transitions. [2021-07-13 19:58:39,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:39,976 INFO L276 IsEmpty]: Start isEmpty. Operand 114434 states and 522335 transitions. [2021-07-13 19:58:40,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:58:40,661 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:40,661 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:40,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:40,861 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:40,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:40,862 INFO L82 PathProgramCache]: Analyzing trace with hash -498320652, now seen corresponding path program 22 times [2021-07-13 19:58:40,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:40,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284769517] [2021-07-13 19:58:40,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:40,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:40,921 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:58:40,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:40,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284769517] [2021-07-13 19:58:40,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284769517] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:40,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339784078] [2021-07-13 19:58:40,922 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:40,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:58:40,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:40,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:58:40,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:41,103 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:41,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339784078] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:41,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:41,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-07-13 19:58:41,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578664901] [2021-07-13 19:58:41,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:58:41,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:41,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:58:41,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:58:41,104 INFO L87 Difference]: Start difference. First operand 114434 states and 522335 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) [2021-07-13 19:58:45,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:45,672 INFO L93 Difference]: Finished difference Result 262218 states and 1170693 transitions. [2021-07-13 19:58:45,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:58:45,672 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 36 [2021-07-13 19:58:45,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:47,865 INFO L225 Difference]: With dead ends: 262218 [2021-07-13 19:58:47,865 INFO L226 Difference]: Without dead ends: 262218 [2021-07-13 19:58:47,866 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 524.3ms TimeCoverageRelationStatistics Valid=520, Invalid=1202, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:58:48,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262218 states. [2021-07-13 19:58:58,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262218 to 187390. [2021-07-13 19:58:58,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187390 states, 187389 states have (on average 4.617053295550966) internal successors, (865185), 187389 states have internal predecessors, (865185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:00,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187390 states to 187390 states and 865185 transitions. [2021-07-13 19:59:00,042 INFO L78 Accepts]: Start accepts. Automaton has 187390 states and 865185 transitions. Word has length 36 [2021-07-13 19:59:00,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:00,042 INFO L482 AbstractCegarLoop]: Abstraction has 187390 states and 865185 transitions. [2021-07-13 19:59:00,042 INFO L483 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) [2021-07-13 19:59:00,042 INFO L276 IsEmpty]: Start isEmpty. Operand 187390 states and 865185 transitions. [2021-07-13 19:59:00,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:59:00,930 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:00,931 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:01,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-07-13 19:59:01,141 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:01,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:01,141 INFO L82 PathProgramCache]: Analyzing trace with hash 2046213610, now seen corresponding path program 23 times [2021-07-13 19:59:01,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:01,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547342880] [2021-07-13 19:59:01,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:01,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:01,198 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:59:01,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:01,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547342880] [2021-07-13 19:59:01,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547342880] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:01,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381999673] [2021-07-13 19:59:01,199 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:01,244 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:59:01,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:01,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:59:01,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:01,381 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:01,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381999673] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:01,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:01,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-07-13 19:59:01,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363603832] [2021-07-13 19:59:01,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:59:01,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:01,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:59:01,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:59:01,384 INFO L87 Difference]: Start difference. First operand 187390 states and 865185 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 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) [2021-07-13 19:59:04,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:04,929 INFO L93 Difference]: Finished difference Result 254683 states and 1137807 transitions. [2021-07-13 19:59:04,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:59:04,929 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 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 36 [2021-07-13 19:59:04,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:07,162 INFO L225 Difference]: With dead ends: 254683 [2021-07-13 19:59:07,162 INFO L226 Difference]: Without dead ends: 254373 [2021-07-13 19:59:07,162 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 348.8ms TimeCoverageRelationStatistics Valid=342, Invalid=848, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:59:08,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254373 states. [2021-07-13 19:59:16,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254373 to 187000. [2021-07-13 19:59:17,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187000 states, 186999 states have (on average 4.611853539323739) internal successors, (862412), 186999 states have internal predecessors, (862412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:19,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187000 states to 187000 states and 862412 transitions. [2021-07-13 19:59:19,173 INFO L78 Accepts]: Start accepts. Automaton has 187000 states and 862412 transitions. Word has length 36 [2021-07-13 19:59:19,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:19,173 INFO L482 AbstractCegarLoop]: Abstraction has 187000 states and 862412 transitions. [2021-07-13 19:59:19,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 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) [2021-07-13 19:59:19,173 INFO L276 IsEmpty]: Start isEmpty. Operand 187000 states and 862412 transitions. [2021-07-13 19:59:19,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:59:19,589 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:19,589 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:19,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:19,790 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:19,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:19,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1041882536, now seen corresponding path program 24 times [2021-07-13 19:59:19,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:19,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108002344] [2021-07-13 19:59:19,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:19,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:19,847 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:59:19,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:19,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108002344] [2021-07-13 19:59:19,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108002344] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:19,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86528333] [2021-07-13 19:59:19,848 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:19,889 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:59:19,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:19,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:59:19,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:20,028 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:20,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86528333] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:20,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:20,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-07-13 19:59:20,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881601774] [2021-07-13 19:59:20,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:59:20,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:20,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:59:20,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:59:20,029 INFO L87 Difference]: Start difference. First operand 187000 states and 862412 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 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) [2021-07-13 19:59:25,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:25,615 INFO L93 Difference]: Finished difference Result 283294 states and 1263502 transitions. [2021-07-13 19:59:25,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:59:25,616 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 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 36 [2021-07-13 19:59:25,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:28,699 INFO L225 Difference]: With dead ends: 283294 [2021-07-13 19:59:28,700 INFO L226 Difference]: Without dead ends: 282784 [2021-07-13 19:59:28,700 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 759.6ms TimeCoverageRelationStatistics Valid=404, Invalid=1078, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:59:29,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282784 states. [2021-07-13 19:59:39,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282784 to 207055. [2021-07-13 19:59:40,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207055 states, 207054 states have (on average 4.6254455359471445) internal successors, (957717), 207054 states have internal predecessors, (957717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:42,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207055 states to 207055 states and 957717 transitions. [2021-07-13 19:59:42,376 INFO L78 Accepts]: Start accepts. Automaton has 207055 states and 957717 transitions. Word has length 36 [2021-07-13 19:59:42,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:42,377 INFO L482 AbstractCegarLoop]: Abstraction has 207055 states and 957717 transitions. [2021-07-13 19:59:42,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 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) [2021-07-13 19:59:42,377 INFO L276 IsEmpty]: Start isEmpty. Operand 207055 states and 957717 transitions. [2021-07-13 19:59:43,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:59:43,172 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:43,172 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:43,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-07-13 19:59:43,385 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:43,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:43,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1862781996, now seen corresponding path program 25 times [2021-07-13 19:59:43,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:43,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517910583] [2021-07-13 19:59:43,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:43,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:43,580 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:43,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:43,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517910583] [2021-07-13 19:59:43,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517910583] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:43,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501124447] [2021-07-13 19:59:43,580 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:43,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:43,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:59:43,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:43,881 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:43,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501124447] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:43,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:43,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:59:43,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421414571] [2021-07-13 19:59:43,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:59:43,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:43,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:59:43,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:59:43,884 INFO L87 Difference]: Start difference. First operand 207055 states and 957717 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 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) [2021-07-13 19:59:48,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:48,408 INFO L93 Difference]: Finished difference Result 290122 states and 1295399 transitions. [2021-07-13 19:59:48,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 19:59:48,409 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 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 36 [2021-07-13 19:59:48,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:50,982 INFO L225 Difference]: With dead ends: 290122 [2021-07-13 19:59:50,982 INFO L226 Difference]: Without dead ends: 289652 [2021-07-13 19:59:50,983 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 722.7ms TimeCoverageRelationStatistics Valid=575, Invalid=1587, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 19:59:51,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289652 states. [2021-07-13 20:00:02,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289652 to 218816. [2021-07-13 20:00:03,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218816 states, 218815 states have (on average 4.624737792198889) internal successors, (1011962), 218815 states have internal predecessors, (1011962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:06,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218816 states to 218816 states and 1011962 transitions. [2021-07-13 20:00:06,462 INFO L78 Accepts]: Start accepts. Automaton has 218816 states and 1011962 transitions. Word has length 36 [2021-07-13 20:00:06,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:00:06,462 INFO L482 AbstractCegarLoop]: Abstraction has 218816 states and 1011962 transitions. [2021-07-13 20:00:06,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 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) [2021-07-13 20:00:06,462 INFO L276 IsEmpty]: Start isEmpty. Operand 218816 states and 1011962 transitions. [2021-07-13 20:00:07,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-13 20:00:07,430 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:00:07,432 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:00:07,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-07-13 20:00:07,653 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:00:07,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:00:07,653 INFO L82 PathProgramCache]: Analyzing trace with hash 688625138, now seen corresponding path program 26 times [2021-07-13 20:00:07,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:00:07,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527994939] [2021-07-13 20:00:07,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:00:07,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:07,736 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:07,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:00:07,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527994939] [2021-07-13 20:00:07,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527994939] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:07,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628670113] [2021-07-13 20:00:07,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:07,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:00:07,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:00:07,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 20:00:07,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:00:07,969 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:07,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628670113] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:07,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:00:07,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 14 [2021-07-13 20:00:07,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61685072] [2021-07-13 20:00:07,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:00:07,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:00:07,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:00:07,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:00:07,972 INFO L87 Difference]: Start difference. First operand 218816 states and 1011962 transitions. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 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) [2021-07-13 20:00:13,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:00:13,701 INFO L93 Difference]: Finished difference Result 275767 states and 1260077 transitions. [2021-07-13 20:00:13,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:00:13,711 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 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 38 [2021-07-13 20:00:13,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:00:17,043 INFO L225 Difference]: With dead ends: 275767 [2021-07-13 20:00:17,043 INFO L226 Difference]: Without dead ends: 274998 [2021-07-13 20:00:17,043 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 133.7ms TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:00:17,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274998 states. [2021-07-13 20:00:31,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274998 to 238003. [2021-07-13 20:00:32,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238003 states, 238002 states have (on average 4.6232090486634565) internal successors, (1100333), 238002 states have internal predecessors, (1100333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:35,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238003 states to 238003 states and 1100333 transitions. [2021-07-13 20:00:35,781 INFO L78 Accepts]: Start accepts. Automaton has 238003 states and 1100333 transitions. Word has length 38 [2021-07-13 20:00:35,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:00:35,782 INFO L482 AbstractCegarLoop]: Abstraction has 238003 states and 1100333 transitions. [2021-07-13 20:00:35,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 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) [2021-07-13 20:00:35,782 INFO L276 IsEmpty]: Start isEmpty. Operand 238003 states and 1100333 transitions. [2021-07-13 20:00:36,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-13 20:00:36,850 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:00:36,850 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:00:37,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-13 20:00:37,080 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:00:37,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:00:37,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1727044438, now seen corresponding path program 27 times [2021-07-13 20:00:37,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:00:37,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968869330] [2021-07-13 20:00:37,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:00:37,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:37,162 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:00:37,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:00:37,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968869330] [2021-07-13 20:00:37,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968869330] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:37,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914216059] [2021-07-13 20:00:37,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:37,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:00:37,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:00:37,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 20:00:37,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:00:37,377 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:37,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914216059] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:37,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:00:37,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 14 [2021-07-13 20:00:37,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526942567] [2021-07-13 20:00:37,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:00:37,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:00:37,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:00:37,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:00:37,379 INFO L87 Difference]: Start difference. First operand 238003 states and 1100333 transitions. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 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) [2021-07-13 20:00:45,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:00:45,134 INFO L93 Difference]: Finished difference Result 394201 states and 1792824 transitions. [2021-07-13 20:00:45,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:00:45,135 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 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 38 [2021-07-13 20:00:45,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:00:52,517 INFO L225 Difference]: With dead ends: 394201 [2021-07-13 20:00:52,517 INFO L226 Difference]: Without dead ends: 392734 [2021-07-13 20:00:52,518 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 148.7ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:00:53,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392734 states. [2021-07-13 20:01:13,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392734 to 306278. [2021-07-13 20:01:15,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306278 states, 306277 states have (on average 4.624082121739471) internal successors, (1416250), 306277 states have internal predecessors, (1416250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:18,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306278 states to 306278 states and 1416250 transitions. [2021-07-13 20:01:18,396 INFO L78 Accepts]: Start accepts. Automaton has 306278 states and 1416250 transitions. Word has length 38 [2021-07-13 20:01:18,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:18,396 INFO L482 AbstractCegarLoop]: Abstraction has 306278 states and 1416250 transitions. [2021-07-13 20:01:18,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 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) [2021-07-13 20:01:18,396 INFO L276 IsEmpty]: Start isEmpty. Operand 306278 states and 1416250 transitions. [2021-07-13 20:01:19,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-13 20:01:19,663 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:19,663 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:01:19,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-13 20:01:19,864 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:19,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:19,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1495021836, now seen corresponding path program 1 times [2021-07-13 20:01:19,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:19,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543961975] [2021-07-13 20:01:19,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:19,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:19,922 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:01:19,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:19,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543961975] [2021-07-13 20:01:19,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543961975] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:19,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461160284] [2021-07-13 20:01:19,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:19,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:19,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 20:01:19,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:20,093 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:20,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461160284] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:20,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:20,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 15 [2021-07-13 20:01:20,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949420550] [2021-07-13 20:01:20,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:01:20,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:20,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:01:20,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:01:20,094 INFO L87 Difference]: Start difference. First operand 306278 states and 1416250 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:31,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:31,513 INFO L93 Difference]: Finished difference Result 586179 states and 2672233 transitions. [2021-07-13 20:01:31,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:01:31,514 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:01:31,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:38,664 INFO L225 Difference]: With dead ends: 586179 [2021-07-13 20:01:38,664 INFO L226 Difference]: Without dead ends: 583951 [2021-07-13 20:01:38,664 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 116.7ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:01:39,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583951 states. [2021-07-13 20:02:11,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583951 to 425975. [2021-07-13 20:02:13,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425975 states, 425974 states have (on average 4.631465770211327) internal successors, (1972884), 425974 states have internal predecessors, (1972884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)